On Mon, Jul 03, 2006 at 11:11:02AM +0200, dmanye wrote: > Herbert Poetzl wrote: > >On Fri, Jun 30, 2006 at 01:12:50PM +0200, dmanye wrote: > > > >>hi, > >> > >>i've a debian etch host with kernel 2.6.16-2-vserver-686 original from > >>debian. util-vserver version is 0.30.210-10 original from debian also. > >> > >>i've created some vservers (debian sarge) with no problems but now i > >>want to build a rembo [v]server on a debian sarge guest. rembo is a > >>comercial/closed-source (sorry) pxe server from www.rembo.com. all went > >>fine until i tried to start the daemon: > >> > >># ./rembo > >>Rembo Server 2.0 Toolkit (build 058.2) > >>(c) 1999-2003 Rembo Technology SaRL, Geneva, Switzerland > >>Error on interface 10.20.102.239 > >># strace ./rembo -d 2>&1 | tail -n 25 > >>open("./rembo", O_RDONLY) = 3 > >>lseek(3, 0, SEEK_END) = 1238692 > >>lseek(3, 0, SEEK_SET) = 0 > >>mmap2(NULL, 1241088, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, > >>-1, 0) = 0xb7cd6000 > >>read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\2\0\3\0\1\0\0\0\0\241\4"..., > >>1238692) = 1238692 > >>open("rembo.conf", O_RDONLY) = 4 > >>fstat64(4, {st_mode=S_IFREG|0644, st_size=91, ...}) = 0 > >>mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, > >>0) = 0xb7f87000 > >>fstat64(4, {st_mode=S_IFREG|0644, st_size=91, ...}) = 0 > >>_llseek(4, 0, [0], SEEK_SET) = 0 > >>read(4, "\n BaseDir \"/rembo\"\n "..., 91) = 91 > >>_llseek(4, 91, [91], SEEK_SET) = 0 > >>close(4) = 0 > >>munmap(0xb7f87000, 4096) = 0 > >>socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 4 > >>bind(4, {sa_family=AF_INET, sin_port=htons(0), > >>sin_addr=inet_addr("127.0.0.1")}, 16) = 0 > >>getsockname(4, {sa_family=AF_INET, sin_port=htons(33007), > >> > > > >it looks like it is looking up 'lo' inside the guest, > >you might try to add 127.0.0.1 as a separate 'nodev' > >entry to the guest, or to disable the hide_netif flag > > > this is what i have on the host: > > # cd /etc/vservers/alf/interfaces/ > mosques:/etc/vservers/alf/interfaces# ls > 0 1 > mosques:/etc/vservers/alf/interfaces# ls 1/ > dev ip mask nodev > mosques:/etc/vservers/alf/interfaces# cat 1/* > lo > 127.0.0.1 > 8 ~~~ looks like a 'prefix' to me, the mask would be 255.0.0.0, no?
> i can ping localhost and 127.0.0.1 inside the vserver but this > does not work: the rembo daemon does not start. also, i've added > CAP_NET_ADMIN and got the same result. > > what i think may bring some light is the following: > if i try to execute the server (it is statically linked) on the host > it works! > so i've compared the output of strace and i get: > > alf (vserver): > ... > socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 4 > bind(4, {sa_family=AF_INET, sin_port=htons(0), > sin_addr=inet_addr("127.0.0.1")}, 16) = 0 > getsockname(4, {sa_family=AF_INET, sin_port=htons(33018), > sin_addr=inet_addr("10.20.102.239")}, [16]) = 0 > futex(0xb7f5b1f0, FUTEX_WAKE, 2147483647) = 0 > write(2, "Error on interface 10.20.102.239"..., 33Error on interface > 10.20.102.239 > > and it dies. > > mosques(host): > ... > socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 4 > bind(4, {sa_family=AF_INET, sin_port=htons(0), > sin_addr=inet_addr("127.0.0.1")}, 16) = 0 > getsockname(4, {sa_family=AF_INET, sin_port=htons(33018), > sin_addr=inet_addr("127.0.0.1")}, [16]) = 0 > close(4) = 0 > uname({sys="Linux", node="mosques", ...}) = 0 > ... and continue ahead. > > > after the 'bind' call, why does alf execute a getsockname with > 10.20.102.239 (just before die) while mosques pass 127.0.0.1 and > continues successfully? is it due to chbind? probably, the src address rewriting does the expected thing here, mapping 127.0.0.1 to the first assigned ip of the guest ... > once more is clear that not having the source code is like selling > your soul, but we have no other viable alternative. > > >>sin_addr=inet_addr("10.20.102.239")}, [16]) = 0 > >>futex(0xb7f3a1f0, FUTEX_WAKE, 2147483647) = 0 > >>write(2, "Error on interface 10.20.102.239"..., 33Error on interface > >>10.20.102.239) = 33 > >>write(1, "Rembo Server 2.0 Toolkit (build "..., 96Rembo Server 2.0 > >>Toolkit (build 058.2) > >>(c) 1999-2003 Rembo Technology SaRL, Geneva, Switzerland) = 96 > >>munmap(0xb7f88000, 4096) = 0 > >>exit_group(0) = ? > >> > >>i've have a couple of non-vserver servers with sarge+rembo running > >>perfectly so i think is a rembo-vserver compatibility issue. > >> > > > >you might also try to 'change' the configuration of > >that pxe server to _not_ use 127.0.0.1 (and use localhost > >or the first assigned ip instead) > > > > > don't know why that code looks for 127.0.0.1. on the other 'real' > rembo servers i have there's nothing in the config about the 'lo' > interface. probably because folks there confused 'localhost' with 127.0.0.1 and simply substituted ... a not really uncommon lapse > >>the vserver has a couple of bcapabilities in order to run also a > >>dhcp server: CAP_NET_RAW and CAP_NET_BROADCAST. > >> > > > >CAP_NET_BROADCAST is not used, so it's unlikely you need > >that one ... but it doesn't hurt either :) > > > i need it because i run a dhcpd server on the same vserser (as i do in > the 'real' other rembo servers). well, what I meant was, the kernel does not use it anymore, so having it has no advantage whatsoever compared to missing it :) best, Herbert > >>thanks in advance. > >> > > > >HTH, > >Herbert > > > > > >>begin:vcard > >>fn;quoted-printable:david many=C3=A9 > >>n;quoted-printable:many=C3=A9;david > >>org;quoted-printable:Universitat Rovira i Virgili;Departament > >>d'Enginyeria Inform=C3=A0tica i Matem=C3=A0tiques > >>adr;quoted-printable;dom:;;Av. dels Pa=C3=AFsos Catalans, > >>26;Tarragona;;43007 > >>email;internet:[EMAIL PROTECTED] > >>tel;work:977559706 > >>version:2.1 > >>end:vcard > >> > >> > > > > > >>_______________________________________________ > >>Vserver mailing list > >>Vserver@list.linux-vserver.org > >>http://list.linux-vserver.org/mailman/listinfo/vserver > >> > > > > > > begin:vcard > fn;quoted-printable:david many=C3=A9 > n;quoted-printable:many=C3=A9;david > org;quoted-printable:Universitat Rovira i Virgili;Departament d'Enginyeria > Inform=C3=A0tica i Matem=C3=A0tiques > adr;quoted-printable;dom:;;Av. dels Pa=C3=AFsos Catalans, 26;Tarragona;;43007 > email;internet:[EMAIL PROTECTED] > tel;work:977559706 > version:2.1 > end:vcard > _______________________________________________ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver