[CentOS-announce] CESA-2010:0125 Moderate CentOS 4 i386 systemtap - security update
CentOS Errata and Security Advisory CESA-2010:0125 systemtap security update for CentOS 4 i386: https://rhn.redhat.com/errata/RHSA-2010-0125.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/systemtap-0.6.2-2.el4_8.1.i386.rpm updates/i386/RPMS/systemtap-runtime-0.6.2-2.el4_8.1.i386.rpm updates/i386/RPMS/systemtap-testsuite-0.6.2-2.el4_8.1.i386.rpm source: updates/SRPMS/systemtap-0.6.2-2.el4_8.1.src.rpm You may update your CentOS-4 i386 installations by running the command: yum update systemtap\* Tru -- Tru Huynh (mirrors, CentOS-3 i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0xBEFA581B pgpIvl9SD69H2.pgp Description: PGP signature ___ CentOS-announce mailing list CentOS-announce@centos.org http://lists.centos.org/mailman/listinfo/centos-announce
Re: [CentOS-virt] [CentOS] Very unresponsive, sometimes stalling domU (5.4, x86_64)
On Tue, Mar 02, 2010 at 09:30:50AM +0100, Timo Schoeler wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi list, please forgive cross posting, but I cannot specify the problem enough to say whether list it fits perfectly, so I'll ask on both. I have some machines based with following specs (see at the end of the email). They run CentOS 5.4 x86_64 with the latest patches applied, Xen-enabled and should host one or more domUs. I put the domUs' storage on LVM, as I learnt ages ago (what never caused any problems) and is way faster than using file-based 'images'. However, there's something special about these machines: They have the new WD EARS series drives, which use 4K sector sizes. So, I booted a rescue system and used fdisk to start at sector 64 instead of 63 (long story made short: Due to overhead causing the drive to do much more, inefficient writes when starting at sector 63, the performance collapses; with 'normal' geometry (sector 63), the drive achieves about 25MiByte/sec writes, with starting at sector 64 partition, it achieves almost 100MiByte/sec writes): [r...@server2 ~]# fdisk -ul /dev/sda Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Device Boot Start End Blocks Id System /dev/sda1 * 64 2097223 1048580 fd Linux raid autodetect Partition 1 does not end on cylinder boundary. /dev/sda2 209722418876487 8389632 82 Linux swap / Solaris /dev/sda318876488 1953525167 967324340 fd Linux raid autodetect On top of those (two per machine) WD EARS HDs there's ``md'' providing two RAID1, /boot and LVM, as well as swap per HD (i.e. non-RAIDed). LVM provides the / partition as well as LVs for Xen domUs. I have about 60 machines running that style and never had any problems. They run like a charm. On these machines, however, domUs are *very* slow, have a steady (!) load of about two -- 50% stating in 'wait' -- and all operations take ages, e.g. a ``yum update'' with the recently released updates. Now, can that be due to 4K issues I didn't see, nestet now in LVM? Help is very appreciated. Maybe the default LVM alignment is wrong for these drives.. did you check/verify that? See: http://thunk.org/tytso/blog/2009/02/20/aligning-filesystems-to-an-ssds-erase-block-size/ Especially the --metadatasize option. -- Pasi ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-es] LVM
Hola, 2010/3/2 wcerv...@gmail.com No creo que tenga algo de malo, al contrario, tiene mas beneficios que el particionado estándar Enviado desde mi dispositivo movil BlackBerry® de Digitel. 1. Puedes ampliar el espacio entre partificiones lógicas. 2. Puedes añadir discos y ampliar la partificón física y luego las lógicas. 3. Puedes copias en caliente de las particiones. Más beneficios que penas :) Yo siempre uso LVM en CentOS y fedora...a día de hoy ningún problema...por ejemplo, un día un cliente solicito ampliar la memoria RAM y gracias a que todo estaba en LVM se redimensiono la memoria swap. Si hubiera estado todo con el particionado normal o reinstalamos todo o se queda la swap con la medida que tenía. -- Oscar Osta Pueyo oostap.lis...@gmail.com _kiakli_ http://fedoraproject.org/ca/ ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] LVM
¿Con que herramientas es posible hacer backup de las particiones? ¿Es posible hacer back-up de las particiones del LVM que corresponden al sistema? Un saludo, Benjamin De: centos-es-boun...@centos.org [mailto:centos-es-boun...@centos.org] En nombre de Oscar Osta Pueyo Enviado el: martes, 02 de marzo de 2010 11:41 Para: centos-es@centos.org; wcerv...@gmail.com Asunto: Re: [CentOS-es] LVM Hola, 2010/3/2 wcerv...@gmail.com No creo que tenga algo de malo, al contrario, tiene mas beneficios que el particionado estándar Enviado desde mi dispositivo movil BlackBerry® de Digitel. 1. Puedes ampliar el espacio entre partificiones lógicas. 2. Puedes añadir discos y ampliar la partificón física y luego las lógicas. 3. Puedes copias en caliente de las particiones. Más beneficios que penas :) Yo siempre uso LVM en CentOS y fedora...a día de hoy ningún problema...por ejemplo, un día un cliente solicito ampliar la memoria RAM y gracias a que todo estaba en LVM se redimensiono la memoria swap. Si hubiera estado todo con el particionado normal o reinstalamos todo o se queda la swap con la medida que tenía. -- Oscar Osta Pueyo oostap.lis...@gmail.com _kiakli_ http://fedoraproject.org/ca/ ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] CentOS 4 en un antiguo PC
Hola: Este es un hilo que inicié con una consulta ya hace más de un mes. Deje estancado el tema y ahora lo he retomado. El tema era que la instalación de CentOS 4.8 i386 se quedaba colgada. El PC era un Pentium III 600MHz 384MB de RAM Siguiendo algunos de vuestros comentarios, he instalado Centos 5.3 (en verdad Elastix que viene en 1 solo CD) y todo funciona bien. Solo quería agradeceros vuestras sugerencias y comentaros el resultado. Un saludo, Benjamin -Mensaje original- De: centos-es-boun...@centos.org [mailto:centos-es-boun...@centos.org] En nombre de Santi Saez Enviado el: miércoles, 20 de enero de 2010 20:55 Para: centos-es@centos.org Asunto: Re: [CentOS-es] CentOS 4 en un antiguo PC El 19/01/10 18:45, Benjamin Pinazo escribió: (..) Emite una secuencia de líneas y despues de la que pone running /sbin/loader aparece una ventana de fondo azul que pone Welcom to CentOS, y al cabo de unos cuantos segundos un mensaje que dice To beging testing the CD media before installation press OK y ya no responde al teclado para seleccionar la opcion. Alguien tiene idea de que puede ser y que puedo hacer para proseguir con la instalación?. ¿Por que no meterle directamente CentOS-5? Como te decían recuerda arrancar con linux text. ¿Es un teclado USB? En cualquier caso, sería extraño que te dejara de funcionar una vez arrancada la instalación. Si sospechas que este es el problema, te recomiendo que localices algun parámetro en el documento Documentation/kernel-parameters.txt que te permita jugar con las opciones del teclado durante el arranque. Si no.. siempre te quedará tirar de una instalación por puerto serie, por PXE, vía Kickstart, pinchar el disco en otro ordenador, etc.. ;-) Saludos, -- Santi Saez http://woop.es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] LVM
2010/3/2 Benjamin Pinazo bpin...@comet-ingenieria.es: ¿Con que herramientas es posible hacer backup de las particiones? ¿Es posible hacer back-up de las particiones del LVM que corresponden al sistema? Te refieres: 1) al volumen lógico donde reside el sistema de archivos? O 2) a obtener un respaldo del esquema de volúmenes (y no de su contenido)? Esto podría parecer útil para reproducir el esquema en un equipo nuevo (tal como uno saca réplica de la tabla de particiones para reproducir un esquema de particionado en otro disco). 3) a realizar un snapshot del filesystem raíz con ténicas de LVM? En principio, tanto particiones como volúmenes LVM son transparentes a nivel de sistema de archivos, o sea, para respaldar archivos no hace falta tener en cuenta de qué forma están definidos los volúmenes o particiones. Es decir, no hay problema en hacer backup de los archivos de no importa qué volumen, sea de sistema o no. Por favor acláranos más tu pregunta, Benjamín. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] Enjaular grupos por FTP
On Martes 02 Marzo 2010 08:56:00 Gonzalo Cabello escribió: Buenas, Tengo un servidor con CentOS 5.4 y Plesk 9.3, en el que deseo crear dos grupos de usuarios (administradores y tecnicos) y en cada uno de ellos, por ejemplo, tres usuarios: - admin1, admin2 y admin3 en el grupo administradores - tec1, tec2 y tec3 en el grupo tecnicos Estos usuarios no tendrán acceso por ssh, solamente deseamos que se pueda acceder por FTP de forma que los creamos de la siguiente forma: useradd -d /var/www/vhosts/dominio.net/carpeta -g administradores -s /sbin/nologin admin1 Y los tecnicos: useradd -d /var/www/vhosts/dominio.net/carpeta/carpeta2 -g tecnicos -s /sbin/nologin tec1 Como se puede ver en la estructura de carpetas, deseamos que los tecnicos solo puedan ver desde carpeta2 para abajo, y los administradores desde carpeta para abajo. El problema es que los tecnicos deben ver su carpeta home, y carpeta2 que será general a todos los tecnicos, pero aun forzando los permisos a 755 de la carpeta, no se ven entre los grupos administradores y tecnicos. El servidor que trae por defecto es ProFTP pero en vez de estar instalado como stand alone, esta como ¿servicio? inetd. He probado a modificar los limites en la configuración, modificar la variable DefaultRoot pero no he conseguido gran cosa. ¿Alguna idea? Gracias de antemano por su ayuda, Double Probablemente con ACL's podrías solucionar tu problema. Saludos!. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] LVM
Muchas gracias por la aclaración.
-Mensaje original-
De: centos-es-boun...@centos.org [mailto:centos-es-boun...@centos.org] En
nombre de Eduardo Grosclaude
Enviado el: martes, 02 de marzo de 2010 14:31
Para: centos-es@centos.org
Asunto: Re: [CentOS-es] LVM
2010/3/2 Benjamin Pinazo bpin...@comet-ingenieria.es:
Con el tratamiento usual yo realizo los siguientes back-ups:
- de datos: lo realizo actualmente con rsync a partir de un directorio
que cuelgan todos los datos, y por lo que comentas ('los volúmenes LVM son
transparentes a nivel de sistema de archivos') por lo tanto esto se puede
seguir haciendo.
Sí.
- el sistema: lo tengo alojado en 1 solo HD y lo realizo sobre otro
disco
idéntico con el comando 'dd' tras arrancar con un liveCD(rescue CD).
También he utilizado clonezilla alguna vez.
Mi duda es como realizar el back-up del sistema con LVM, porque según he
leído, no se pueden copiar algunos ficheros del sistema arrancado ya que
Linux los bloquea.
Hummm... Desde este punto de vista, no veo diferencia entre
filesystems soportados por particiones y por volúmenes. Un volumen
lógico es lo más equivalente a una partición que te puedas imaginar,
sólo que implementada por software. O sea, sin los inconvenientes de
rigidez de las particiones.
Entiendo que si arranco con un LiveCD no va a reconocer
ese sistema de volúmenes lógicos y no puedo realizar la copia?. Porque
supongo que la información de LVM se guarda en el propio sistema.
El LiveCD debería contar con soporte de LVM. Con un disco de arranque
de CentOS o Fedora, por ejemplo, arrancando en modo rescate tienes
automáticamente montado el disco rígido. Si se trata de otra distro, y
tiene soporte de LVM, puede ser que te dé los comandos lvscan, vgscan,
etc., o bien una consola lvm donde pides scan de los volúmenes; y a
partir de allí puedes operar sobre ellos como en el sistema normal.
Por lo del punto 2 que detallas, ni me lo he planteado, no llego a tanto.
El punto 3 de realizar un snapshot del filesystem raíz, serviría para
hacer
respaldo de todo. Lo único que la frecuencia del respaldo de datos
prefiero
que sea diaria y la de sistema, como varía poco, anual. Por eso prefiero
tener copias separadas.
En el caso que comentas, dada la forma como haces las copias con dd
desde un sistema de rescate, la técnica de snapshots te permitiría
hacer el respaldo del filesystem alojado en un volumen lógico en
estado consistente, sin parar el equipo. Lo cual posiblemente no estás
obteniendo ahora con tus backups de datos.
Si instalas la guía correspondiente (yum install
Deployment_Guide-es-ES.noarch) te podrás sacar todas las dudas sobre
LVM. LVM mejora la disponibilidad en muchos sentidos. No es que sea
una tecnología indispensable para todos los casos, pero para quienes
administran servidores es una herramienta que viene muy bien conocer.
Aunque quizás en un futuro se porte ZFS, lo que sería una superación,
o de alguna otra forma se incorporen las funciones de LVM al
filesystem.
--
Eduardo Grosclaude
Universidad Nacional del Comahue
Neuquen, Argentina
___
CentOS-es mailing list
CentOS-es@centos.org
http://lists.centos.org/mailman/listinfo/centos-es
___
CentOS-es mailing list
CentOS-es@centos.org
http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] Enjaular grupos por FTP
Listo Pepe ... hoy entre 7:00 y 7:30 PM estoy en tu office. Saludos, Javier. -Mensaje original- De: centos-es-boun...@centos.org [mailto:centos-es-boun...@centos.org] En nombre de César Sepúlveda Barra Enviado el: martes, 02 de marzo de 2010 10:42 a.m. Para: centos-es@centos.org Asunto: Re: [CentOS-es] Enjaular grupos por FTP On Martes 02 Marzo 2010 08:56:00 Gonzalo Cabello escribió: Buenas, Tengo un servidor con CentOS 5.4 y Plesk 9.3, en el que deseo crear dos grupos de usuarios (administradores y tecnicos) y en cada uno de ellos, por ejemplo, tres usuarios: - admin1, admin2 y admin3 en el grupo administradores - tec1, tec2 y tec3 en el grupo tecnicos Estos usuarios no tendrán acceso por ssh, solamente deseamos que se pueda acceder por FTP de forma que los creamos de la siguiente forma: useradd -d /var/www/vhosts/dominio.net/carpeta -g administradores -s /sbin/nologin admin1 Y los tecnicos: useradd -d /var/www/vhosts/dominio.net/carpeta/carpeta2 -g tecnicos -s /sbin/nologin tec1 Como se puede ver en la estructura de carpetas, deseamos que los tecnicos solo puedan ver desde carpeta2 para abajo, y los administradores desde carpeta para abajo. El problema es que los tecnicos deben ver su carpeta home, y carpeta2 que será general a todos los tecnicos, pero aun forzando los permisos a 755 de la carpeta, no se ven entre los grupos administradores y tecnicos. El servidor que trae por defecto es ProFTP pero en vez de estar instalado como stand alone, esta como ¿servicio? inetd. He probado a modificar los limites en la configuración, modificar la variable DefaultRoot pero no he conseguido gran cosa. ¿Alguna idea? Gracias de antemano por su ayuda, Double Probablemente con ACL's podrías solucionar tu problema. Saludos!. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es __ Información de ESET NOD32 Antivirus, versión de la base de firmas de virus 4909 (20100302) __ ESET NOD32 Antivirus ha comprobado este mensaje. http://www.eset.com __ Información de ESET NOD32 Antivirus, versión de la base de firmas de virus 4909 (20100302) __ ESET NOD32 Antivirus ha comprobado este mensaje. http://www.eset.com ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] Enjaular grupos por FTP
Hola Lista, Mil disculpas por favor, fue un error de dedo. Saludos, Javier. -Mensaje original- De: centos-es-boun...@centos.org [mailto:centos-es-boun...@centos.org] En nombre de Javier Aquino H. Enviado el: martes, 02 de marzo de 2010 11:36 a.m. Para: centos-es@centos.org Asunto: Re: [CentOS-es] Enjaular grupos por FTP Listo Pepe ... hoy entre 7:00 y 7:30 PM estoy en tu office. Saludos, Javier. -Mensaje original- De: centos-es-boun...@centos.org [mailto:centos-es-boun...@centos.org] En nombre de César Sepúlveda Barra Enviado el: martes, 02 de marzo de 2010 10:42 a.m. Para: centos-es@centos.org Asunto: Re: [CentOS-es] Enjaular grupos por FTP On Martes 02 Marzo 2010 08:56:00 Gonzalo Cabello escribió: Buenas, Tengo un servidor con CentOS 5.4 y Plesk 9.3, en el que deseo crear dos grupos de usuarios (administradores y tecnicos) y en cada uno de ellos, por ejemplo, tres usuarios: - admin1, admin2 y admin3 en el grupo administradores - tec1, tec2 y tec3 en el grupo tecnicos Estos usuarios no tendrán acceso por ssh, solamente deseamos que se pueda acceder por FTP de forma que los creamos de la siguiente forma: useradd -d /var/www/vhosts/dominio.net/carpeta -g administradores -s /sbin/nologin admin1 Y los tecnicos: useradd -d /var/www/vhosts/dominio.net/carpeta/carpeta2 -g tecnicos -s /sbin/nologin tec1 Como se puede ver en la estructura de carpetas, deseamos que los tecnicos solo puedan ver desde carpeta2 para abajo, y los administradores desde carpeta para abajo. El problema es que los tecnicos deben ver su carpeta home, y carpeta2 que será general a todos los tecnicos, pero aun forzando los permisos a 755 de la carpeta, no se ven entre los grupos administradores y tecnicos. El servidor que trae por defecto es ProFTP pero en vez de estar instalado como stand alone, esta como ¿servicio? inetd. He probado a modificar los limites en la configuración, modificar la variable DefaultRoot pero no he conseguido gran cosa. ¿Alguna idea? Gracias de antemano por su ayuda, Double Probablemente con ACL's podrías solucionar tu problema. Saludos!. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es __ Información de ESET NOD32 Antivirus, versión de la base de firmas de virus 4909 (20100302) __ ESET NOD32 Antivirus ha comprobado este mensaje. http://www.eset.com __ Información de ESET NOD32 Antivirus, versión de la base de firmas de virus 4909 (20100302) __ ESET NOD32 Antivirus ha comprobado este mensaje. http://www.eset.com ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es __ Información de ESET NOD32 Antivirus, versión de la base de firmas de virus 4909 (20100302) __ ESET NOD32 Antivirus ha comprobado este mensaje. http://www.eset.com __ Información de ESET NOD32 Antivirus, versión de la base de firmas de virus 4909 (20100302) __ ESET NOD32 Antivirus ha comprobado este mensaje. http://www.eset.com ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
[CentOS-es] OpenLDAP
Hola amigos en esta ocasión con la siguiente duda, tengo mi servidor OpenLdap con samba haciendo un dominio, mi pregunta es porque cuando agrego maquinas Windows al dominio se me modifica el perfil y el escritorio, y si hay alguna manera de evitar esta situación, ya que las carpetas de Mis documentos ya no aparecen, los correos, y demás configuraciones. saludos ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] OpenLDAP
On Tue, 2010-03-02 at 16:15 -0600, Alejandro Marin Maturano wrote: Hola amigos en esta ocasión con la siguiente duda, tengo mi servidor OpenLdap con samba haciendo un dominio, mi pregunta es porque cuando agrego maquinas Windows al dominio se me modifica el perfil y el escritorio, y si hay alguna manera de evitar esta situación, ya que las carpetas de Mis documentos ya no aparecen, los correos, y demás configuraciones. eso te pasara asi uses como controlador de dominio Samba/LDAP, NT4 o Active Directory. lo normal es q se cree un nuevo perfil para el usuario en el dominio pq en esencia al asociarte al dominio y loguearte como un usuario del dominio estas creando un nuevo usuario en la estacion de trabajo. ese ya es un tema q escapa de CentOS y tiene mas q ver con administracion de redes windows (el q uses Samba no quita q sea una red windows) y tendras q buscar herramientas q permitan mover perfiles locales a dominio (lo mas basico es usar en el caso de XP la herramienta para copiar respaldo de un perfil cuando lo vas a trasladar a otra maquina y una vez logueado al dominio, restaurar el perfil desde esa copia de respaldo, hay otras tecnicas, tb manuales con las cuales copias la data y luego le metes mano al registro y a los permisos de archivo y sobre eso herramientas para automatizar todos esos procesos) -- Black Hand ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
[CentOS] Very unresponsive, sometimes stalling domU (5.4, x86_64)
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi list, please forgive cross posting, but I cannot specify the problem enough to say whether list it fits perfectly, so I'll ask on both. I have some machines based with following specs (see at the end of the email). They run CentOS 5.4 x86_64 with the latest patches applied, Xen-enabled and should host one or more domUs. I put the domUs' storage on LVM, as I learnt ages ago (what never caused any problems) and is way faster than using file-based 'images'. However, there's something special about these machines: They have the new WD EARS series drives, which use 4K sector sizes. So, I booted a rescue system and used fdisk to start at sector 64 instead of 63 (long story made short: Due to overhead causing the drive to do much more, inefficient writes when starting at sector 63, the performance collapses; with 'normal' geometry (sector 63), the drive achieves about 25MiByte/sec writes, with starting at sector 64 partition, it achieves almost 100MiByte/sec writes): [r...@server2 ~]# fdisk -ul /dev/sda Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Device Boot Start End Blocks Id System /dev/sda1 * 64 2097223 1048580 fd Linux raid autodetect Partition 1 does not end on cylinder boundary. /dev/sda2 209722418876487 8389632 82 Linux swap / Solaris /dev/sda318876488 1953525167 967324340 fd Linux raid autodetect On top of those (two per machine) WD EARS HDs there's ``md'' providing two RAID1, /boot and LVM, as well as swap per HD (i.e. non-RAIDed). LVM provides the / partition as well as LVs for Xen domUs. I have about 60 machines running that style and never had any problems. They run like a charm. On these machines, however, domUs are *very* slow, have a steady (!) load of about two -- 50% stating in 'wait' -- and all operations take ages, e.g. a ``yum update'' with the recently released updates. Now, can that be due to 4K issues I didn't see, nestet now in LVM? Help is very appreciated. Cheers, Timo - --- Linux server2.blah.org 2.6.18-164.11.1.el5xen #1 SMP Wed Jan 20 08:06:04 EST 2010 x86_64 x86_64 x86_64 GNU/Linux - --- [r...@server2 ~]# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Quad CPUQ9400 @ 2.66GHz stepping: 10 cpu MHz : 1998.000 cache size : 3072 KB physical id : 0 siblings: 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx smx est tm2 cx16 xtpr lahf_lm bogomips: 6668.58 clflush size: 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Quad CPUQ9400 @ 2.66GHz stepping: 10 cpu MHz : 1998.000 cache size : 3072 KB physical id : 1 siblings: 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx smx est tm2 cx16 xtpr lahf_lm bogomips: 6668.58 clflush size: 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 2 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Quad CPUQ9400 @ 2.66GHz stepping: 10 cpu MHz : 1998.000 cache size : 3072 KB physical id : 2 siblings: 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx smx est tm2 cx16 xtpr lahf_lm bogomips: 6668.58 clflush size: 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Quad CPUQ9400 @ 2.66GHz stepping: 10 cpu MHz : 1998.000 cache size : 3072 KB physical id : 3 siblings: 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu tsc msr pae mce cx8 apic mtrr mca
Re: [CentOS] Success moving Xen LVMs from 32 to 64bit host
On Mon, Mar 01, 2010 at 02:47:23PM -0500, Kwan Lowe wrote: Just wanted to share some success I had moving some Xen guests from one server to another. Problem Recap We had Xen host on a single core 32-bit CentOS 5.4 installation on an AMD Athlon 2.1 GhZ system that was giving hard drive errors and needed to move the LVM-backed Xen images to another server. The replacement server was a quad-core AMD Phenom system running 64-bit CentOS 5.4. Our original plan was to use LVM snapshots so that we wouldn't need a maintenance window. This worked fine in test, but we decided to bring down the Xen guests after all. After shutting down the systems we backed up the LVMs. To show the backing LV: lvdisplay /dev/rootvg/xm_c32_001 From this, we grabbed the Current LE field and LV Size. We used LV Size to create a temporary mount point. We used the Current LE parameter to create an identically sized LV on the replacement server . On the failing server: dd if=/dev/rootvg/xm_c32_001 of=/mnt/backup/xm_c32_001.out We gzip'ed the resulting .out file and saved it as a backup. +++Footnote BTW, there are many recommendations to do the following on the virtual machine: dd if=/dev/zero bs=1024 count= of=/partition.out rm partition.out By creating the large empty file on each partition *in the guest istance* (/var, /, /home, etc.), it will improve the image compression. Space was not much of a concern and we were worried about blowing out a production system, so we opted not to do this. +++Footnote Once the backing LVM was created, we created the LV on the replacement server: lvcreate -l xxx -n xm_c32_001 rootvg Then used dd to recreate the file: dd if=xm_c32_001.out of=/dev/rootvg/xm_c32_001 Next, we copied the /etc/xen/xm_c32_001 configuration file to the replacement server. We generated a new UUID using the uuidgen utility. We also created a new MAC address. ^ Finally, we started the instance: xm create xm_c32_001 Everything came up, but no network. From the root console we logged in then edited the /etc/sysconfig/network-scripts/ifcfg-eth0. Xen had apparently renamed the script and put in a DHCP configuration. It's not Xen renaming the script :) You changed the MAC address, so the centos network init scripts will rename the ifcfg file, and generate new default one (with dhcp). rhel/centos ifcfg-eth* are based on MAC addresses. -- Pasi We just renamed the backup file and commented out the MAC address line and restarted networking, *and* ifdown eth0 then ifup eth0. It took a few seconds for the network to properly discover the new MAC address. Once that was done, everything worked beautifully. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How do I create a new menu category in GNOME ?
JohnS a écrit : No no No... Here I found my link I used to do it amnually: It is for system wide... http://wiki.matusov.sk/howto/gnome-menu-edit This is what I went by to do it so I could include the files in my rpm build, which took a whole afternoon about. Thanks very much for the link! That did the trick. Now I have a shiny new entry 'Medintux' in my 'Applications' menu. Have a nice day, Niki ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Very unresponsive, sometimes stalling domU (5.4, x86_64)
On Tue, Mar 02, 2010 at 09:30:50AM +0100, Timo Schoeler wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi list, please forgive cross posting, but I cannot specify the problem enough to say whether list it fits perfectly, so I'll ask on both. I have some machines based with following specs (see at the end of the email). They run CentOS 5.4 x86_64 with the latest patches applied, Xen-enabled and should host one or more domUs. I put the domUs' storage on LVM, as I learnt ages ago (what never caused any problems) and is way faster than using file-based 'images'. However, there's something special about these machines: They have the new WD EARS series drives, which use 4K sector sizes. So, I booted a rescue system and used fdisk to start at sector 64 instead of 63 (long story made short: Due to overhead causing the drive to do much more, inefficient writes when starting at sector 63, the performance collapses; with 'normal' geometry (sector 63), the drive achieves about 25MiByte/sec writes, with starting at sector 64 partition, it achieves almost 100MiByte/sec writes): [r...@server2 ~]# fdisk -ul /dev/sda Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Device Boot Start End Blocks Id System /dev/sda1 * 64 2097223 1048580 fd Linux raid autodetect Partition 1 does not end on cylinder boundary. /dev/sda2 209722418876487 8389632 82 Linux swap / Solaris /dev/sda318876488 1953525167 967324340 fd Linux raid autodetect On top of those (two per machine) WD EARS HDs there's ``md'' providing two RAID1, /boot and LVM, as well as swap per HD (i.e. non-RAIDed). LVM provides the / partition as well as LVs for Xen domUs. I have about 60 machines running that style and never had any problems. They run like a charm. On these machines, however, domUs are *very* slow, have a steady (!) load of about two -- 50% stating in 'wait' -- and all operations take ages, e.g. a ``yum update'' with the recently released updates. Now, can that be due to 4K issues I didn't see, nestet now in LVM? Help is very appreciated. Maybe the default LVM alignment is wrong for these drives.. did you check/verify that? See: http://thunk.org/tytso/blog/2009/02/20/aligning-filesystems-to-an-ssds-erase-block-size/ Especially the --metadatasize option. -- Pasi ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] kexec for CentOS 4?
I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to do is, from the currently-running system, to invoke an installation kernel and initrd in just the same way that GRUB would, giving it a boot command line that specifies a remote kickstart file, installation tree, and other required info. It looks like kexec is the right tool to do this, but I have only been able to find it for CentOS 5. Does anyone know where I could get kexec for CentOS 4? Does the CentOS 4 kernel support it? If not, are there any other ways to achieve what I've described? Thanks Tony -- Tony Mountifield Work: t...@softins.co.uk - http://www.softins.co.uk Play: t...@mountifield.org - http://tony.mountifield.org ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Perl 5.10 as default version of Perl
No. http://www.centos.org/modules/smartfaq/faq.php?faqid=5 Kai -- Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Sendmail analyser
Greetings, I have a message file from a certain sendmail server. I am expected to report about delivery failures and the reasons thereof. Any already invented wheels? I need to do it offline and not on the sendmail server. any ides? TIA Regards, Rajagopal ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Sendmail analyser
Am 02.03.2010 12:33, schrieb Rajagopal Swaminathan: I have a message file from a certain sendmail server. I am expected to report about delivery failures and the reasons thereof. Any already invented wheels? I need to do it offline and not on the sendmail server. any ides? A search for sendmail analyzer at freshmeat shows some results: http://freshmeat.net/search?q=sendmail+analyzersubmit=Search Regards, Peter signature.asc Description: OpenPGP digital signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Sendmail analyser
Greetings, On Tue, Mar 2, 2010 at 5:18 PM, Peter Hinse l...@d0pefish.de wrote: Am 02.03.2010 12:33, schrieb Rajagopal Swaminathan: A search for sendmail analyzer at freshmeat shows some results: http://freshmeat.net/search?q=sendmail+analyzersubmit=Search Thanks Peter. In IRc somebody pointed out http://sareport.darold.net/ currently investigating it. Regards, Rajagopal ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kexec for CentOS 4?
On 03/02/2010 05:10 AM, Tony Mountifield wrote: I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to do is, from the currently-running system, to invoke an installation kernel and initrd in just the same way that GRUB would, giving it a boot command line that specifies a remote kickstart file, installation tree, and other required info. If not, are there any other ways to achieve what I've described? I would use cobbler and koan for this. Once you have a cobbler server setup for the kickstart (which is super easy to do), you can use koan with the --replace-self and -k options and do exactly what you want. Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Problem.
Greetings all, I am using Centos-5.3 in my server which is running dns, apache and mail. When the power went off and back then all of my services are not be able to run, i visited log files esp for httpd it says read-only and httpd cant start, this cause all of my services to stop. i tried to fix by fsck but still i cant be able to log in my mails via web access because httpd is not running, in short all services stopped. I need help, what to do so that to change the read-only mode, i cant even delete any file. After running fsck and reboot now it reached:- (none) login: and if i type root gives incorrect. Please help me so that to get back my mail server online (mails are in this server). regards, Damas -- ICT4Community, in Community, with Community. dama...@hotmail.com/aim.com/juasun.net +255 (0) 715 /784 /767 464 678 QQ 860719395, skype: damas.ally ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem.
On Tue, Mar 02, 2010 at 05:08:22PM +0300, Damas Ally wrote: Greetings all, I am using Centos-5.3 in my server which is running dns, apache and mail. When the power went off and back then all of my services are not be able to run, i visited log files esp for httpd it says read-only and httpd cant start, this cause all of my services to stop. i tried to fix by fsck but still i cant be able to log in my mails via web access because httpd is not running, in short all services stopped. I need help, what to do so that to change the read-only mode, i cant even delete any file. After running fsck and reboot now it reached:- (none) login: and if i type root gives incorrect. Please help me so that to get back my mail server online (mails are in this server). Hi, Did you checked appriopriate (/var) partition with fsck? -- Dominik Zyla pgpP0kuPlbmLF.pgp Description: PGP signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kexec for CentOS 4?
In article 4b8d1650.1060...@mcclatchyinteractive.com, Tom Georgoulias t...@mcclatchyinteractive.com wrote: On 03/02/2010 05:10 AM, Tony Mountifield wrote: I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to do is, from the currently-running system, to invoke an installation kernel and initrd in just the same way that GRUB would, giving it a boot command line that specifies a remote kickstart file, installation tree, and other required info. If not, are there any other ways to achieve what I've described? I would use cobbler and koan for this. Once you have a cobbler server setup for the kickstart (which is super easy to do), you can use koan with the --replace-self and -k options and do exactly what you want. Can this be done even if I can't put the cobbler server on the same network as the box I want to re-install? The information I found on cobbler suggested to me that it was a tying together of DHCP, PXE, kickstart and install tree. As I understand it, the DHCP and PXE/TFTP servers have to be local, and also I have to have the box able to perform a PXE boot. So if the box in question is remote and on a network that I don't control or have any other boxes on, I suspect cobbler and koan wouldn't work. I could well have misunderstood - I found very little detail about koan apart from the command line options. Cheers Tony -- Tony Mountifield Work: t...@softins.co.uk - http://www.softins.co.uk Play: t...@mountifield.org - http://tony.mountifield.org ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Using USB Tape drive on Centos 5.3 (kernel 2.6.18-164.10.1.el5PAE)
Hello there I have been trying to install HP Storageworks DAT72 on CentOS 5 in vain. On system reboot, neither /dev/st not /dev/sg is available. May you please lead me through as this is my first time trying to do it lsmod Module Size Used by ipv6 267617 40 xfrm_nalgo 13381 1 ipv6 crypto_api 12609 1 xfrm_nalgo autofs429253 2 hidp 23105 2 dahdi_echocan_mg2 10248 0 wanec 306712 0 af_wanpipe 38080 0 wanpipe 459296 64 wanrouter 42336 6 wanec,af_wanpipe,wanpipe dahdi 192392 128 dahdi_echocan_mg2,wanpipe crc_ccitt 6337 1 dahdi sdladrv79648 2 wanpipe,wanrouter rfcomm 42457 0 l2cap 29505 10 hidp,rfcomm bluetooth 53925 5 hidp,rfcomm,l2cap sunrpc145533 1 dm_multipath 24909 0 scsi_dh11713 1 dm_multipath video 21193 0 hwmon 7365 0 backlight 10049 1 video sbs18533 0 i2c_ec 9025 1 sbs i2c_core 23745 1 i2c_ec button 10705 0 battery13637 0 asus_acpi 19289 0 ac 9157 0 parport_pc 29157 0 lp 15849 0 parport37513 2 parport_pc,lp hpilo 13389 0 bnx2 173133 0 serio_raw 10693 0 pcspkr 7105 0 dm_raid45 67145 0 dm_message 6977 1 dm_raid45 dm_region_hash 15681 1 dm_raid45 dm_mem_cache9537 1 dm_raid45 dm_snapshot22885 0 dm_zero 6209 0 dm_mirror 24265 0 dm_log 14657 3 dm_raid45,dm_region_hash,dm_mirror dm_mod 63225 11 dm_multipath,dm_raid45,dm_snapshot,dm_zero,dm_mirror,dm_log cciss 67909 3 sd_mod 25281 0 scsi_mod 141717 3 scsi_dh,cciss,sd_mod ext3 125001 2 jbd57065 1 ext3 uhci_hcd 25549 0 ohci_hcd 24809 0 ehci_hcd 34125 0 #cat /etc/modprobe.conf alias eth0 bnx2 alias eth1 bnx2 alias eth2 bnx2 alias eth3 bnx2 alias scsi_hostadapter cciss alias scsi_hostadapter1 usb-storage install usb-storage : --- #ls -l /dev [r...@scb-dr-pbx01 ~]# ll /dev/ total 0 crw--- 1 root root 10,62 Mar 2 18:06 autofs drwxr-xr-x 3 root root 60 Mar 2 18:06 bus drwxr-xr-x 2 root root100 Mar 2 18:06 cciss crw--- 1 root root 5, 1 Mar 2 18:07 console lrwxrwxrwx 1 root root 11 Mar 2 18:06 core - /proc/kcore drwxr-xr-x 2 asterisk asterisk 1360 Mar 2 18:06 dahdi drwxr-xr-x 4 root root 80 Mar 2 18:06 disk lrwxrwxrwx 1 root root 13 Mar 2 18:06 fd - /proc/self/fd crw-rw-rw- 1 root root 1, 7 Mar 2 18:06 full srwxrwxrwx 1 root root 0 Mar 2 18:06 gpmctl crw--- 1 root root 10, 228 Mar 2 18:06 hpet drwxr-xr-x 2 root root200 Mar 2 18:06 hpilo prw--- 1 root root 0 Mar 2 18:06 initctl drwxr-xr-x 2 root root160 Mar 2 18:06 input crw--- 1 root root 1,11 Mar 2 18:06 kmsg srw-rw-rw- 1 root root 0 Mar 2 18:06 log brw-r- 1 root disk 7, 0 Mar 2 18:06 loop0 brw-r- 1 root disk 7, 1 Mar 2 18:06 loop1 brw-r- 1 root disk 7, 2 Mar 2 18:06 loop2 brw-r- 1 root disk 7, 3 Mar 2 18:06 loop3 brw-r- 1 root disk 7, 4 Mar 2 18:06 loop4 brw-r- 1 root disk 7, 5 Mar 2 18:06 loop5 brw-r- 1 root disk 7, 6 Mar 2 18:06 loop6 brw-r- 1 root disk 7, 7 Mar 2 18:06 loop7 lrwxrwxrwx 1 root root 13 Mar 2 18:06 MAKEDEV - /sbin/MAKEDEV drwxr-xr-x 2 root root100 Mar 2 18:06 mapper brw-r- 1 root disk 9, 0 Mar 2 18:06 md0 crw-r- 1 root kmem 1, 1 Mar 2 18:06 mem drwxr-xr-x 2 root root 60 Mar 2 18:06 net crw-rw-rw- 1 root root 1, 3 Mar 2 18:06 null crw-rw 1 root root 10, 144 Mar 2 18:06 nvram crw--- 1 root root 1,12 Mar 2 18:06 oldmem crw-rw 1 root lp99, 0 Mar 2 18:06 parport0 crw-rw 1 root lp99, 1 Mar 2 18:06 parport1 crw-rw 1 root lp99, 2 Mar 2 18:06 parport2 crw-rw 1 root lp99, 3 Mar 2 18:06 parport3 crw-r- 1 root kmem 1, 4 Mar 2 18:06 port crw--- 1 root root 108, 0 Mar 2 18:06 ppp crw-rw-rw- 1 root tty5, 2
Re: [CentOS] kexec for CentOS 4?
On Tue, Mar 02, 2010 at 03:04:06PM +, Tony Mountifield wrote: In article 4b8d1650.1060...@mcclatchyinteractive.com, Tom Georgoulias t...@mcclatchyinteractive.com wrote: On 03/02/2010 05:10 AM, Tony Mountifield wrote: I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to do is, from the currently-running system, to invoke an installation kernel and initrd in just the same way that GRUB would, giving it a boot command line that specifies a remote kickstart file, installation tree, and other required info. If not, are there any other ways to achieve what I've described? I would use cobbler and koan for this. Once you have a cobbler server setup for the kickstart (which is super easy to do), you can use koan with the --replace-self and -k options and do exactly what you want. Can this be done even if I can't put the cobbler server on the same network as the box I want to re-install? The information I found on cobbler suggested to me that it was a tying together of DHCP, PXE, kickstart and install tree. As I understand it, the DHCP and PXE/TFTP servers have to be local, and also I have to have the box able to perform a PXE boot. So if the box in question is remote and on a network that I don't control or have any other boxes on, I suspect cobbler and koan wouldn't work. I could well have misunderstood - I found very little detail about koan apart from the command line options. Hi, Yes, It must be the same network/vlan. -- Dominik Zyla pgpmQMYO7b7qH.pgp Description: PGP signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Success moving Xen LVMs from 32 to 64bit host
Thanks Henry... On Tue, Mar 2, 2010 at 2:10 AM, henry ritzlmayr cen...@rc0.at wrote: Next, we copied the /etc/xen/xm_c32_001 configuration file to the replacement server. We generated a new UUID using the uuidgen utility. We also created a new MAC address. Finally, we started the instance: Since you moved your virtual machine, you wouldn´t have to create a new UUID and no new MAC address. This is only required if you copy a virtual machine and if you want both up at the same time. Yes.. It's possible that we may have multiple copies of these systems.. Also, I un xm create xm_c32_001 Everything came up, but no network. From the root console we logged in then edited the /etc/sysconfig/network-scripts/ifcfg-eth0. Xen had apparently renamed the script and put in a DHCP configuration. We just renamed the backup file and commented out the MAC address line and restarted networking, *and* ifdown eth0 then ifup eth0. This is because you changed the MAC address. If you would have left it at the original value, the network would have started right away with the old config. :D Yes.. My error caused by re-using a script that autogenerated the config file. I had been playing with VMWare Lab Manager recently and was looking to emulate the template functionality in Xen. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Success moving Xen LVMs from 32 to 64bit host
On Tue, Mar 2, 2010 at 4:14 AM, Pasi Kärkkäinen pa...@iki.fi wrote: It's not Xen renaming the script :) You changed the MAC address, so the centos network init scripts will rename the ifcfg file, and generate new default one (with dhcp). rhel/centos ifcfg-eth* are based on MAC addresses. Thanks Pasi... Pretty cool feature... I was overly enthusiastic in trying to figure out why I couldn't see the vm after I booted it. If I'd waited or re-arp'ed it would have worked without my meddling. Chalk a point up for CentOS :P ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kexec for CentOS 4?
On 03/02/2010 10:04 AM, Tony Mountifield wrote: In article4b8d1650.1060...@mcclatchyinteractive.com, Tom Georgouliast...@mcclatchyinteractive.com wrote: On 03/02/2010 05:10 AM, Tony Mountifield wrote: I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to do is, from the currently-running system, to invoke an installation kernel and initrd in just the same way that GRUB would, giving it a boot command line that specifies a remote kickstart file, installation tree, and other required info. If not, are there any other ways to achieve what I've described? I would use cobbler and koan for this. Once you have a cobbler server setup for the kickstart (which is super easy to do), you can use koan with the --replace-self and -k options and do exactly what you want. Can this be done even if I can't put the cobbler server on the same network as the box I want to re-install? The information I found on cobbler suggested to me that it was a tying together of DHCP, PXE, kickstart and install tree. As I understand it, the DHCP and PXE/TFTP servers have to be local, and also I have to have the box able to perform a PXE boot. So if the box in question is remote and on a network that I don't control or have any other boxes on, I suspect cobbler and koan wouldn't work. I could well have misunderstood - I found very little detail about koan apart from the command line options. You can use cobbler and install clients without DHCP/PXE. When you run koan, you pass in all of the normal kickstart options you would use to configure a static network interface (ip, netmask, gateway, dns, ksdevice, etc.). Koan will download the kickstart config and initrd/vmlinuz images you need to boot up, plus add all of the grub entries you need to automatically get into the kickstart after a reboot. On your next reboot, it will choose that entry in grub, immediately go into kickstart mode, and follow the config in the ks.cfg file that it pulled from the cobbler server. Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kexec for CentOS 4?
On 03/02/2010 10:10 AM, Tony Mountifield wrote: I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to ... If not, are there any other ways to achieve what I've described? Try this ( or a process like this ) : http://www.karan.org/blog/index.php/2005/06/15/ Make sure you test the line you end up using ( like in a local VM ) before you do this on the live machine. The process works, I've used it many times in the past ( and about a dozen times in just the last 10 days ). - KB ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kexec for CentOS 4?
On Tue, 2 Mar 2010 at 10:10am, Tony Mountifield wrote I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to do is, from the currently-running system, to invoke an installation kernel and initrd in just the same way that GRUB would, giving it a boot command line that specifies a remote kickstart file, installation tree, and other required info. This is simple. Grab the vmlinuz and initrd.img files from the pxeboot directory of the repo you want to install from. Put those in /boot on the server in question. From there, there are a couple of ways you can go. The easiest is to actually put the ks.cfg on the server itself. Then you can add a stanza like the following (you'll need to tailor all the hard drive references to your own setup, of course) to your grub.conf: title reinstall root (hd0,0) kernel /boot/vmlinuz ks=hd:sda1:/ks.cfg ksdevice=eth0 initrd /boot/initrd.img Make that entry the default, reboot, and your kickstart will start. Obviously all of your network info needs to be specified in the ks.cfg file. If you want to grab the ks.cfg from a remote server, that can be done too, but you'll need to specify the network config options on the kernel line above. I don't have the exact syntax handy, but it's all documented. Install the anaconda package and look in /usr/share/doc/anaconda-$VERSION/command-line.txt and you can see all the options you can pass to the install kernel. On CentOS-5 installs I always use noipv6, since it seems to make things go much faster. For a one-off like this, installing cobbler is a bit (read: a lot) of overkill. -- Joshua Baker-LePain QB3 Shared Cluster Sysadmin UCSF ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kexec for CentOS 4?
In article 4b8d34be.3090...@mcclatchyinteractive.com, Tom Georgoulias t...@mcclatchyinteractive.com wrote: On 03/02/2010 10:04 AM, Tony Mountifield wrote: In article4b8d1650.1060...@mcclatchyinteractive.com, Tom Georgouliast...@mcclatchyinteractive.com wrote: On 03/02/2010 05:10 AM, Tony Mountifield wrote: I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to do is, from the currently-running system, to invoke an installation kernel and initrd in just the same way that GRUB would, giving it a boot command line that specifies a remote kickstart file, installation tree, and other required info. If not, are there any other ways to achieve what I've described? I would use cobbler and koan for this. Once you have a cobbler server setup for the kickstart (which is super easy to do), you can use koan with the --replace-self and -k options and do exactly what you want. Can this be done even if I can't put the cobbler server on the same network as the box I want to re-install? The information I found on cobbler suggested to me that it was a tying together of DHCP, PXE, kickstart and install tree. As I understand it, the DHCP and PXE/TFTP servers have to be local, and also I have to have the box able to perform a PXE boot. So if the box in question is remote and on a network that I don't control or have any other boxes on, I suspect cobbler and koan wouldn't work. I could well have misunderstood - I found very little detail about koan apart from the command line options. You can use cobbler and install clients without DHCP/PXE. When you run koan, you pass in all of the normal kickstart options you would use to configure a static network interface (ip, netmask, gateway, dns, ksdevice, etc.). Koan will download the kickstart config and initrd/vmlinuz images you need to boot up, plus add all of the grub entries you need to automatically get into the kickstart after a reboot. On your next reboot, it will choose that entry in grub, immediately go into kickstart mode, and follow the config in the ks.cfg file that it pulled from the cobbler server. Cool, that makes sense - thanks! It hadn't occurred to me that I could add a new kernel and initrd to grub.conf with the required append line, and then just reboot. Obvious when you think about it! Cheers Tony -- Tony Mountifield Work: t...@softins.co.uk - http://www.softins.co.uk Play: t...@mountifield.org - http://tony.mountifield.org ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kexec for CentOS 4?
In article 4b8d36f8.2070...@karan.org, Karanbir Singh mail-li...@karan.org wrote: On 03/02/2010 10:10 AM, Tony Mountifield wrote: I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to ... If not, are there any other ways to achieve what I've described? Try this ( or a process like this ) : http://www.karan.org/blog/index.php/2005/06/15/ Make sure you test the line you end up using ( like in a local VM ) before you do this on the live machine. The process works, I've used it many times in the past ( and about a dozen times in just the last 10 days ). Excellent, thanks! Obvious once you've seen it. :-) Cheers Tony -- Tony Mountifield Work: t...@softins.co.uk - http://www.softins.co.uk Play: t...@mountifield.org - http://tony.mountifield.org ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kexec for CentOS 4?
On 03/02/2010 11:20 AM, Tony Mountifield wrote: You can use cobbler and install clients without DHCP/PXE. When you run koan, you pass in all of the normal kickstart options you would use to configure a static network interface (ip, netmask, gateway, dns, ksdevice, etc.). Koan will download the kickstart config and initrd/vmlinuz images you need to boot up, plus add all of the grub entries you need to automatically get into the kickstart after a reboot. On your next reboot, it will choose that entry in grub, immediately go into kickstart mode, and follow the config in the ks.cfg file that it pulled from the cobbler server. Cool, that makes sense - thanks! It hadn't occurred to me that I could add a new kernel and initrd to grub.conf with the required append line, and then just reboot. Obvious when you think about it! Also, look into Joshua's reply for setting up the same thing that koan does up w/o the cobbler server part. If you are just going to do this a single time and don't think you'd want cobbler or have something else for kickstarts, his advice is great. Good luck. Tom ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] {Disarmed} Problem.
Damas Ally wrote on Tue, 2 Mar 2010 17:08:22 +0300: After running fsck and reboot now it reached:- (none) login: and if i type root gives incorrect. Haven't seen this prompt for a while. Is it possible that it just wants the root password? (not root by itself, it will log you in as root anyway!) Kai -- Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Using USB Tape drive on Centos 5.3 (kernel 2.6.18-164.10.1.el5PAE)
From: Muro, Sam resea...@businesstz.com I have been trying to install HP Storageworks DAT72 on CentOS 5 in vain. On system reboot, neither /dev/st not /dev/sg is available. May you please lead me through as this is my first time trying to do it What does lsusb show? Just a thought; did you check in the BIOS if there are USB options (legacy and such)? Maybe install 'HP StorageWorks LTT' (Library and Tape Tools); it might help testing... JD ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] CentOS-announce Digest, Vol 61, Issue 1
Send CentOS-announce mailing list submissions to
centos-annou...@centos.org
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.centos.org/mailman/listinfo/centos-announce
or, via email, send a message with subject or body 'help' to
centos-announce-requ...@centos.org
You can reach the person managing the list at
centos-announce-ow...@centos.org
When replying, please edit your Subject line so it is more specific
than Re: Contents of CentOS-announce digest...
Today's Topics:
1. CESA-2010:0109 Moderate CentOS 5 i386 mysql Update
(Karanbir Singh)
2. CESA-2010:0109 Moderate CentOS 5 x86_64 mysql Update
(Karanbir Singh)
3. CEBA-2010:0120 CentOS 5 i386 coreutils Update (Karanbir Singh)
4. CEBA-2010:0120 CentOS 5 x86_64 coreutils Update (Karanbir Singh)
5. CESA-2010:0122 Important CentOS 5 i386 sudo Update
(Karanbir Singh)
6. CESA-2010:0122 Important CentOS 5 x86_64 sudo Update
(Karanbir Singh)
7. CEBA-2010:0123 CentOS 5 i386 openssh Update (Karanbir Singh)
8. CEBA-2010:0123 CentOS 5 x86_64 openssh Update (Karanbir Singh)
9. CESA-2010:0125 Moderate CentOS 4 i386 systemtap - security
update (Tru Huynh)
10. CESA-2010:0125 Moderate CentOS 4 x86_64 systemtap - security
update (Tru Huynh)
--
Message: 1
Date: Mon, 1 Mar 2010 18:43:17 +
From: Karanbir Singh kbsi...@centos.org
Subject: [CentOS-announce] CESA-2010:0109 Moderate CentOS 5 i386 mysql
Update
To: centos-annou...@centos.org
Message-ID: 20100301184317.ga12...@chakra.karan.org
Content-Type: text/plain; charset=us-ascii
CentOS Errata and Security Advisory 2010:0109 Moderate
Upstream details at : http://rhn.redhat.com/errata/RHSA-2010-0109.html
The following updated files have been uploaded and are currently
syncing to the mirrors: ( md5sum Filename )
i386:
37200089252dddfb4a98ed63c2d50cbc mysql-5.0.77-4.el5_4.2.i386.rpm
bc12d83158cecdbd67370b187a4422db mysql-bench-5.0.77-4.el5_4.2.i386.rpm
92123a9b03b1b46ada811bc9ad880cf2 mysql-devel-5.0.77-4.el5_4.2.i386.rpm
d17190eb584546cd6619212007f0a4b6 mysql-server-5.0.77-4.el5_4.2.i386.rpm
9995578eb7a594110e7acaadd60702c9 mysql-test-5.0.77-4.el5_4.2.i386.rpm
Source:
a4e45550d082ec47db11f4abb02359b5 mysql-5.0.77-4.el5_4.2.src.rpm
--
Karanbir Singh
CentOS Project { http://www.centos.org/ }
irc: z00dax, #cen...@irc.freenode.net
--
Message: 2
Date: Mon, 1 Mar 2010 18:43:17 +
From: Karanbir Singh kbsi...@centos.org
Subject: [CentOS-announce] CESA-2010:0109 Moderate CentOS 5 x86_64
mysql Update
To: centos-annou...@centos.org
Message-ID: 20100301184317.ga12...@chakra.karan.org
Content-Type: text/plain; charset=us-ascii
CentOS Errata and Security Advisory 2010:0109 Moderate
Upstream details at : http://rhn.redhat.com/errata/RHSA-2010-0109.html
The following updated files have been uploaded and are currently
syncing to the mirrors: ( md5sum Filename )
x86_64:
d3793de989c2bb288faf17fbe0b17131 mysql-5.0.77-4.el5_4.2.i386.rpm
8f2e404cb17cac0b712b73e9d5519487 mysql-5.0.77-4.el5_4.2.x86_64.rpm
0402f2b2fed77e2cb538194fba693494 mysql-bench-5.0.77-4.el5_4.2.x86_64.rpm
993ee197369a1c277e238d61b4ea03d6 mysql-devel-5.0.77-4.el5_4.2.i386.rpm
89246a1a1fd6b6bd85c58bed28576e50 mysql-devel-5.0.77-4.el5_4.2.x86_64.rpm
be976f972a100f1a1edf6e8cd490d9e6 mysql-server-5.0.77-4.el5_4.2.x86_64.rpm
e45474e49ff5d82c444bd9227459ef9d mysql-test-5.0.77-4.el5_4.2.x86_64.rpm
Source:
a4e45550d082ec47db11f4abb02359b5 mysql-5.0.77-4.el5_4.2.src.rpm
--
Karanbir Singh
CentOS Project { http://www.centos.org/ }
irc: z00dax, #cen...@irc.freenode.net
--
Message: 3
Date: Mon, 1 Mar 2010 18:44:02 +
From: Karanbir Singh kbsi...@centos.org
Subject: [CentOS-announce] CEBA-2010:0120 CentOS 5 i386 coreutils
Update
To: centos-annou...@centos.org
Message-ID: 20100301184402.ga12...@chakra.karan.org
Content-Type: text/plain; charset=us-ascii
CentOS Errata and Bugfix Advisory 2010:0120
Upstream details at : http://rhn.redhat.com/errata/RHBA-2010-0120.html
The following updated files have been uploaded and are currently
syncing to the mirrors: ( md5sum Filename )
i386:
110d59f05de91ad9ac566bc60bc466f0 coreutils-5.97-23.el5_4.2.i386.rpm
Source:
e9e6230d000ed3240098a70bee60766d coreutils-5.97-23.el5_4.2.src.rpm
--
Karanbir Singh
CentOS Project { http://www.centos.org/ }
irc: z00dax, #cen...@irc.freenode.net
--
Message: 4
Date: Mon, 1 Mar 2010 18:44:02 +
From: Karanbir Singh kbsi...@centos.org
Subject: [CentOS-announce] CEBA-2010:0120 CentOS 5 x86_64 coreutils
Update
To: centos-annou...@centos.org
Message-ID: 20100301184402.ga12...@chakra.karan.org
Content-Type: text/plain; charset=us-ascii
CentOS Errata and Bugfix Advisory 2010:0120
Upstream details at :
Re: [CentOS] Problem.
From: Damas Ally dama...@gmail.com When the power went off and back then all of my services are not be able to run, i visited log files esp for httpd it says read-only and httpd cant start, this cause all of my services to stop. i tried to fix by fsck but still i cant be able to log in my mails via web access because httpd is not running, in short all services stopped. I need help, what to do so that to change the read-only mode, i cant even delete any file. I think it is read-only because the filesystem has errors... How did you run fsck? automaticaly or interactively? You could 'mount -n -o remount,rw /' but it is unsafe if the filesystem is unclean... JD ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] kexec for CentOS 4?
In article alpine.lrh.2.00.1003021050260.7...@hogwarts.egr.duke.edu, Joshua Baker-LePain jl...@duke.edu wrote: On Tue, 2 Mar 2010 at 10:10am, Tony Mountifield wrote I have a remote CentOS 4 machine on a network where I can't put a DHCP or PXE server, and I want to do a complete reinstall. So what I want to do is, from the currently-running system, to invoke an installation kernel and initrd in just the same way that GRUB would, giving it a boot command line that specifies a remote kickstart file, installation tree, and other required info. This is simple. Grab the vmlinuz and initrd.img files from the pxeboot directory of the repo you want to install from. Put those in /boot on the server in question. From there, there are a couple of ways you can go. The easiest is to actually put the ks.cfg on the server itself. Then you can add a stanza like the following (you'll need to tailor all the hard drive references to your own setup, of course) to your grub.conf: title reinstall root (hd0,0) kernel /boot/vmlinuz ks=hd:sda1:/ks.cfg ksdevice=eth0 initrd /boot/initrd.img Make that entry the default, reboot, and your kickstart will start. Obviously all of your network info needs to be specified in the ks.cfg file. If you want to grab the ks.cfg from a remote server, that can be done too, but you'll need to specify the network config options on the kernel line above. I don't have the exact syntax handy, but it's all documented. Install the anaconda package and look in /usr/share/doc/anaconda-$VERSION/command-line.txt and you can see all the options you can pass to the install kernel. On CentOS-5 installs I always use noipv6, since it seems to make things go much faster. For a one-off like this, installing cobbler is a bit (read: a lot) of overkill. Thanks - much appreciated! Tony -- Tony Mountifield Work: t...@softins.co.uk - http://www.softins.co.uk Play: t...@mountifield.org - http://tony.mountifield.org ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Virtual Machine Path Issue
All, I'm running CentOS 5.3 x86_64 and I decided to install VMware Server 2.0.2 and all went without a hitch. I then created a Virtual Machine and used CentOS 5.4 x86_32 ISO image to build it. While I was customizing the built image, I attempted a 'find' command and received a message that the command could not be found. I checked root's path statement and found some strange entries (i.e. /usr/bini). Once I corrected those entries all seems to be working fine now. I don't have a physical platform to test the ISO on, so I must remain in the virtual arena. How can I tell if this is an error with the ISO or something going crazy during the VM build? Thanks, Gene Poole ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] DHCP client not working with Windows DHCP / dynamic DNS server
# Broadcom Corporation NetXtreme BCM5754 Gigabit Ethernet PCI Express DEVICE=eth0 BOOTPROTO=dhcp HWADDR=00:22:19:XX:XX:XX ONBOOT=yes DHCP_HOSTNAME=centos.XX.local In this particular instance, it's a place where Windows is used for DHCP and DNS servers. :( I have no control over the Windows side of things. The Windows sysadmins claim I don't need a fixed IP address, because DNS will pick up the name after I make the DHCP request. The problem is, that doesn't happen, even though the DHCP client is correctly configured (see above). The system is vanilla CentOS 5.4, text-mode install, fully updated. I boot the CentOS system. Then, on another Linux machine, I do host centos.XXX.local and it returns host not found. However, if I do the same for other hostnames, DNS resolution works fine. Is there anything else I can do on my side to make it happen? Any particular options in dhclient.conf or something like that? -- Florin Andrei http://florin.myip.org/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] DHCP client not working with Windows DHCP / dynamic DNS server
Florin Andrei wrote: Is there anything else I can do on my side to make it happen? Any particular options in dhclient.conf or something like that? See the man page ? DYNAMIC DNS The client now has some very limited support for doing DNS updates when a lease is acquired. This is prototypical, and probably doesn't do what you want. It also only works if you happen to have control over your DNS server, which isn't very likely. To make it work, you have to declare a key and zone as in the DHCP server (see dhcpd.conf(5) for details). You also need to configure the fqdn option on the client, as follows: send fqdn.fqdn grosse.fugue.com.; send fqdn.encoded on; send fqdn.server-update off; The fqdn.fqdn option MUST be a fully-qualified domain name. You MUST define a zone statement for the zone to be updated. The fqdn.encoded option may need to be set to on or off, depending on the DHCP server you are using. -- On my company's windows network the IT guy just assigns static IPs via MAC addresses to those that want a fixed IP and create a DNS name associated with it. Myself I've never liked dynamic DNS, never used it, I like my zone files organized(and plain text, no binary crap) and I suspect dynamic DNS would screw it all up. I've seen how horribly polluted zones can get on windows networks with dynamic DNS, overlapping names, multiple DNS entries for the same IP etc. nate ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Using USB Tape drive on Centos 5.3 (kernel 2.6.18-164.10.1.el5PAE)
John Doe wrote: From: Muro, Sam resea...@businesstz.com I have been trying to install HP Storageworks DAT72 on CentOS 5 in vain. On system reboot, neither /dev/st not /dev/sg is available. May you please lead me through as this is my first time trying to do it What does lsusb show? I have lost the connection to the server but I will post this output later today Just a thought; did you check in the BIOS if there are USB options (legacy and such)? Maybe install 'HP StorageWorks LTT' (Library and Tape Tools); it might help testing... I have also downloaded the utility and shall let you know how it goes JD ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Wireless Made Easy (for Home Desktops)
For those of you who use a wireless router and may work on one or two (or even several) machines in your computer room, an AP Client is a nice solution. When you move to another machine you can just move the wireless net adapter to the new machine and you're up and running on the network immediately. I've been using a D-Link G730AP for a while -- but it's not really made for this -- it's a pocket adapter meant to carry with you laptop. And, unlike my old Asus WL-330, it won't hook up to a switch. Asus also makes a more powerful, larger, wireless AP/Client/Bridge/Reapeater, the WL-320gE. I bought two of these on eBay and they work great as Clients (network adapters) or Stations in Asus talk. They have a range of 850 meters (as compared to the pocket AP's range of 40 meters) so, in my room, I've got the full speed of my Cable wirelessly. It's three to four times faster than the D-Link G730AP, and it's solid (the D-Link was iffy). But, more importantly, I can hook it up to a wired (standard) switch and have as many simultaneous network connections as ports in the switch (in this case, four -- but I only use two). I've also set one up in the back of the house with a switch for my son's computers -- through several walls they're still getting very fast service. This is the only way I've used this device, but a lot of people buy them as repeaters. (I could mine up a repeater/client and my kids would have an even stronger single, but it's not necessary.) Another feature of Asus is that you can use it simultaneously as a bridge and as a wired client. It works well, the documentation is a bit inadequate, but it doesn't take long to translate. Anyhow, I've rambled again. The reason I bring this up is that these things are currently selling for $25 on eBay -- which is about the cost of mid-range USB adapter. The seller has nearly 800 of them. (I have no relationship with the seller, except I'm a customer.) The eBay link is at http://tinyurl.com/ykysncw -- RonB -- Using CentOS 5.4 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Back to apcupsd
Ok, so another apc UPS 3000 complained about bad batteries, and I changed them out from the same order that I'd gotten in a couple of months ago. The APC SmartUPS 3000 started connecting and disconnecting the USB connection. I brought down and up the service, no joy. Finally, after googling, I found a *completely* undocumented way to start apcupsd, that a few years ago someone was told to try, so as to log debugging info, to send to a developer: apcupsd -d1000 -T I've just skimmed the man page, and the online docs, and there is *no* mention of either parm. I found nothing in the logs. However, when I kill -HUPped it, and restarted the service, the USB stuff had stopped. Ok, one problem down. The change battery light's still on. I'll see if it still is in the morning. One thing I did note, while skimming the docs, and comparing my results from apcaccess, was that while the nominal voltage for the APC SmartUPS 3000 is 48V, the new batteries are showing 55.4V. Anyone have any idea if this could be why the replace battery light's on - it's more than 5V difference? mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Back to apcupsd
m.r...@5-cent.us wrote: ...that while the nominal voltage for the APC SmartUPS 3000 is 48V, the new batteries are showing 55.4V. lead acid batteries are 2.1-2.15V per cell when fully charged, and the trickle charging float voltage is more like 2.3V per cell. 2.3 * 6 cells/battery * 4 batteries == 55 V to read the batteries charge state, you would need to disconnect them from the charger(UPS) for about 4-6 hours before reading the voltage, this lets the surface charge dissipate. After doing this, you should see 12.6-12.8V per 12v battery, or 50.4 to 51.2V for your stack of 4 * 12V. All these voltages assume 68-72F battery temperature.48V is nearly totally discharged ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Success moving Xen LVMs from 32 to 64bit host
The network should not have been an issue, are you sure you used the same vm config on both hosts? That means the mac address would stay the same, and their should not be any L2 related issues, that are related to vm anyway. Ted On Mar 1, 2010, at 2:47 PM, Kwan Lowe wrote: Just wanted to share some success I had moving some Xen guests from one server to another. Problem Recap We had Xen host on a single core 32-bit CentOS 5.4 installation on an AMD Athlon 2.1 GhZ system that was giving hard drive errors and needed to move the LVM-backed Xen images to another server. The replacement server was a quad-core AMD Phenom system running 64-bit CentOS 5.4. Our original plan was to use LVM snapshots so that we wouldn't need a maintenance window. This worked fine in test, but we decided to bring down the Xen guests after all. After shutting down the systems we backed up the LVMs. To show the backing LV: lvdisplay /dev/rootvg/xm_c32_001 From this, we grabbed the Current LE field and LV Size. We used LV Size to create a temporary mount point. We used the Current LE parameter to create an identically sized LV on the replacement server . On the failing server: dd if=/dev/rootvg/xm_c32_001 of=/mnt/backup/xm_c32_001.out We gzip'ed the resulting .out file and saved it as a backup. +++Footnote BTW, there are many recommendations to do the following on the virtual machine: dd if=/dev/zero bs=1024 count= of=/partition.out rm partition.out By creating the large empty file on each partition *in the guest istance* (/var, /, /home, etc.), it will improve the image compression. Space was not much of a concern and we were worried about blowing out a production system, so we opted not to do this. +++Footnote Once the backing LVM was created, we created the LV on the replacement server: lvcreate -l xxx -n xm_c32_001 rootvg Then used dd to recreate the file: dd if=xm_c32_001.out of=/dev/rootvg/xm_c32_001 Next, we copied the /etc/xen/xm_c32_001 configuration file to the replacement server. We generated a new UUID using the uuidgen utility. We also created a new MAC address. Finally, we started the instance: xm create xm_c32_001 Everything came up, but no network. From the root console we logged in then edited the /etc/sysconfig/network-scripts/ifcfg-eth0. Xen had apparently renamed the script and put in a DHCP configuration. We just renamed the backup file and commented out the MAC address line and restarted networking, *and* ifdown eth0 then ifup eth0. It took a few seconds for the network to properly discover the new MAC address. Once that was done, everything worked beautifully. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem.
That is the root password you need to specify. then you need to look BEFORE that line and find out what fsck cannot check with the -a flag set. You need to run fsck on the partition in question, then correct all errors and type exit at the end. the machine will then reboot. jobst On Tue, Mar 02, 2010 at 05:08:22PM +0300, Damas Ally (dama...@gmail.com) wrote: Greetings all, I am using Centos-5.3 in my server which is running dns, apache and mail. When the power went off and back then all of my services are not be able to run, i visited log files esp for httpd it says read-only and httpd cant start, this cause all of my services to stop. i tried to fix by fsck but still i cant be able to log in my mails via web access because httpd is not running, in short all services stopped. I need help, what to do so that to change the read-only mode, i cant even delete any file. After running fsck and reboot now it reached:- (none) login: and if i type root gives incorrect. Please help me so that to get back my mail server online (mails are in this server). regards, Damas -- ICT4Community, in Community, with Community. dama...@hotmail.com/aim.com/juasun.net +255 (0) 715 /784 /767 464 678 QQ 860719395, skype: damas.ally ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- C is a write-only language. | |0| | Jobst Schmalenbach, jo...@barrett.com.au, General Manager | | |0| Barrett Consulting Group P/L The Meditation Room P/L |0|0|0| +61 3 9532 7677, POBox 277, Caulfield South, 3162, Australia ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Using USB Tape drive on Centos 5.3 (kernel 2.6.18-164.10.1.el5PAE)
I use a lot of tapes but never a USB, but from my knowledge I would try lsusb then read the output and look at the id's, find the one that has the usb tape drive attached to it, then use lsusb -vv and find the matching id to get more info. You could also try: modprobe usb_storage then modbrobe st and then do lsmod | grep storage lsmod | grep st that they are loaded (st should require to load the scsi stuff too). You could also look into /dev and look at the major numbers (from memory 9 is tapes??). ls -al /dev/tape/by-id and ls -la /dev/.udev and look through all of those. check whether there is something with usb-st or so. jobst On Tue, Mar 02, 2010 at 06:13:01PM +0300, Muro, Sam (resea...@businesstz.com) wrote: Hello there I have been trying to install HP Storageworks DAT72 on CentOS 5 in vain. On system reboot, neither /dev/st not /dev/sg is available. May you please lead me through as this is my first time trying to do it lsmod Module Size Used by ipv6 267617 40 xfrm_nalgo 13381 1 ipv6 crypto_api 12609 1 xfrm_nalgo autofs429253 2 hidp 23105 2 dahdi_echocan_mg2 10248 0 wanec 306712 0 af_wanpipe 38080 0 wanpipe 459296 64 wanrouter 42336 6 wanec,af_wanpipe,wanpipe dahdi 192392 128 dahdi_echocan_mg2,wanpipe crc_ccitt 6337 1 dahdi sdladrv79648 2 wanpipe,wanrouter rfcomm 42457 0 l2cap 29505 10 hidp,rfcomm bluetooth 53925 5 hidp,rfcomm,l2cap sunrpc145533 1 dm_multipath 24909 0 scsi_dh11713 1 dm_multipath video 21193 0 hwmon 7365 0 backlight 10049 1 video sbs18533 0 i2c_ec 9025 1 sbs i2c_core 23745 1 i2c_ec button 10705 0 battery13637 0 asus_acpi 19289 0 ac 9157 0 parport_pc 29157 0 lp 15849 0 parport37513 2 parport_pc,lp hpilo 13389 0 bnx2 173133 0 serio_raw 10693 0 pcspkr 7105 0 dm_raid45 67145 0 dm_message 6977 1 dm_raid45 dm_region_hash 15681 1 dm_raid45 dm_mem_cache9537 1 dm_raid45 dm_snapshot22885 0 dm_zero 6209 0 dm_mirror 24265 0 dm_log 14657 3 dm_raid45,dm_region_hash,dm_mirror dm_mod 63225 11 dm_multipath,dm_raid45,dm_snapshot,dm_zero,dm_mirror,dm_log cciss 67909 3 sd_mod 25281 0 scsi_mod 141717 3 scsi_dh,cciss,sd_mod ext3 125001 2 jbd57065 1 ext3 uhci_hcd 25549 0 ohci_hcd 24809 0 ehci_hcd 34125 0 #cat /etc/modprobe.conf alias eth0 bnx2 alias eth1 bnx2 alias eth2 bnx2 alias eth3 bnx2 alias scsi_hostadapter cciss alias scsi_hostadapter1 usb-storage install usb-storage : --- #ls -l /dev [r...@scb-dr-pbx01 ~]# ll /dev/ total 0 crw--- 1 root root 10,62 Mar 2 18:06 autofs drwxr-xr-x 3 root root 60 Mar 2 18:06 bus drwxr-xr-x 2 root root100 Mar 2 18:06 cciss crw--- 1 root root 5, 1 Mar 2 18:07 console lrwxrwxrwx 1 root root 11 Mar 2 18:06 core - /proc/kcore drwxr-xr-x 2 asterisk asterisk 1360 Mar 2 18:06 dahdi drwxr-xr-x 4 root root 80 Mar 2 18:06 disk lrwxrwxrwx 1 root root 13 Mar 2 18:06 fd - /proc/self/fd crw-rw-rw- 1 root root 1, 7 Mar 2 18:06 full srwxrwxrwx 1 root root 0 Mar 2 18:06 gpmctl crw--- 1 root root 10, 228 Mar 2 18:06 hpet drwxr-xr-x 2 root root200 Mar 2 18:06 hpilo prw--- 1 root root 0 Mar 2 18:06 initctl drwxr-xr-x 2 root root160 Mar 2 18:06 input crw--- 1 root root 1,11 Mar 2 18:06 kmsg srw-rw-rw- 1 root root 0 Mar 2 18:06 log brw-r- 1 root disk 7, 0 Mar 2 18:06 loop0 brw-r- 1 root disk 7, 1 Mar 2 18:06 loop1 brw-r- 1 root disk 7, 2 Mar 2 18:06 loop2 brw-r- 1 root disk 7, 3 Mar 2 18:06 loop3 brw-r- 1 root disk 7, 4 Mar 2 18:06 loop4 brw-r- 1 root disk 7, 5 Mar 2 18:06 loop5 brw-r- 1 root disk 7, 6 Mar 2 18:06 loop6 brw-r- 1 root disk 7, 7 Mar 2 18:06 loop7 lrwxrwxrwx 1 root root 13 Mar 2
