[Vserver] ideal setup
Hello, I've been using linux-vserver for years and years. I'm getting ready to put a couple servers into use and it seems things have changed greatly since I last configured it. Namely, you can do lots of cool stuff that couldn't be done before. I'll admit, I'm using a budget colo facility. I want to keep my bandwidth down. To achieve this, I've connected the servers via eth1 to each other to create a private lan. Ideally, all traffic between the hosts would use this lan. I first started struggling with the idea of setting up multihomed vhosts when I realized it was pure insanity to do so. It would be so much better to create all the vservers on the private lan segment and use the hosts as routers to the outside world. By using SNAT rules, I can keep all my vhost traffic quiet and I can even install different services on different vhosts. Smart, right? Am I on the right track here, or should I just use multi-homed vservers? Anyone here seen a scenario like this documented? I'd love to be able to stand on the shoulders of giants. Additionally, I would love to use both quota and have the benefits of unification. I understand that to use quotas you need a separate filesystem. Of course, this makes unification impossible. So I had a bright idea. Most of the user data, everything I think I need to count against quotas as a matter of fact, will be in /home. So what if I create a filesystem (loop for example) and somehow mount it so that it is /home in the vserver. Would this allow me to enable quotas on the /home area of the disk? Lastly, what is the best way to share user accounts across several vservers? (possibly spanning two physical hosts) Best being simple, reliable, non resource intensive and secure. Thanks for your suggestions and help. -- Matthew Nuzum newz2000 on freenode ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] Re: Nagios 2.x on a vserver. Anyone?
on 2.x kernels, the raw_icmp capability replaces the insecure CAP_NET_RAW. raw_icmp is given by default on mainline util-vserver since (at least) 0.30.208 (and we now have 0.30.209) What I did to get it to work was: * Add CAP_NET_RAW to the capabilities of the vserver (in /etc/vservers) again, are we talking about 1.2.x or 2.x kernels here? This confused the heck out of me when I first read it... to clarify to anyone else who didn't get it at first, and I may be the only one, 1.x kernels means Linux 2.4.x kernels patched with the linux vserver 1.2.x version patches (i.e. vserver 1.2.x). 2.x kernels means Linux 2.6.x kernels patched with the linux vserver 2.x version patches (i.e. vserver 2.x). Kernel 1.x == Linux 2.4, vserver 1.2.x Kernel 2.x == Linux 2.6, vserver 2.x -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] Fake packages for removing useless dependency packagesfrom RHEL/CentOS/Fedora vservers [scanned]
Hi list! I have got created a bundle of RPM packages that allow one to remove packages that are absolutely useless inside vservers: vps-dev-3.999-1.cru contains the usual vserver /dev structure and provides dev, hence allowing one to remove the following packages: - udev - hwdata - usbutils - hotplug - MAKEDEV vps-fakekernel-2.6.999-1.cru is able to replace any real kernel package. vps-fakepackages-1.0-2.cru contains just a few fake compatibility files for initscripts and allows the dependency-aware removal/replacement of these packages: - module-init-tools - mkinitrd - lvm2 - device-mapper - mingetty For a usual CentOS 4.2 minimum installation this results in saving 28% disk usage (before: 116MB, after: 84MB) and a much cleaner filesystem. ... Best regards, // Veit Veit, I don't use CentOS and I'm phasing out my RPM based distros, so I don't need the packages, but I want to say that this is an excellent thing you've done. Brilliant, really. Good idea and good work, -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] solaris zones vs. vserver
Given news like http://www.heise.de/newsticker/meldung/65815 I'd be interested in an informal comparison of Solaris zones and VServer. We actually discussed this several months ago at length. Check the archives for the history of that conversation. In a nutshell, here is my *opinion* [1] on the matter: The Linux Vserver project and Solaris Containers serve a very similar role. They both: * have little system overhead * serve as an excellent way to partition a server into logical servers isolated from each other, especially with the goal of placing applications meant for different servers onto the same box * is great when you want all of the logical servers to run the same os/kernel [2]. Some people use Linux Vserver as a general purpose virtual server solution allowing them to sell or give a virtual server to customers who want root access. However, some of the traits needed to market this type of product are new, immature, or in development, such as quotas, memory limits and cpu limits. I think Solaris' containers may have a slight advantage if you need these features. Some people use Linux Vserver as a way to mirror applications across physical servers so that downtime can be minimized. I think the Linux Vserver project has an advantage over Solaris here. Neither tool will allow you to run completely different operating systems or kernels. For example, with Solaris, your containers use Solaris. If you have a box running Linux 2.6.12 then all of your linux vservers on that box use Linux 2.6.12. The only solution to this is a different tool such as Xen, UML, VMWare and the like. With those you basically run an entire OS on a virtual computer, meaning resource utilization is much higher. NOTES: [1] I don't use Solaris containers, but I have evaluated them. I also don't use the most modern release of the Linux Vserver project nor its tools, but again, I have evaluated them. I do run several physical servers that make use of the Linux Vserver project and it's tools to run several virtual servers. [2] You can run different Linux distributions on separate vservers, but they will all use the same kernel. This can cause difficulty with some newer linux distributions but largely these can be worked around. Running Fedora Core 3 vservers on a Fedora Core 3 host, or running Debian vservers on a Debian host (and etc) seems to work better than, for example, running Fedora Core 3 vservers on a Debian host. Again, it can be done, it just seems to take a little extra effort to get things going. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] Re: VServer forum
If people are not smart enough to check at the bottom of a thread for new/updated/corrected info, they should not be allowed near any electrical/electronic device... 8-) umm... yes, Mr. CEO? Yes sir, I've been told that I must confiscate all of your electronic devices, so can you please finish checking your e-mail because I have take your computer. Oh, is that your PDA? I need that too. And your cell-phone. No, you can keep the lamp. Thanks, we're sure this will be better for everyone in the long run. I know you'll understand. BTW, let's change the word smart to diligent. I know a lot of smart people who are too busy to read the whole e-mail. Uh... actually, I might qualify as one of those people. :-] It's actually kind of funny that I read this particular message because it's only the second one in this thread I've actually glanced at. Good thing you top-posted. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] is DMZ on dummy[0-9] good practice
I wanted to have a DMZ and installed an additional network card to bind all these vservers to. But then I discovered the dummy device and want to change eth1 against dummy0 (after installing the dummy module ;-) and remove the additional network card from the server if it can be done. But first I want to know, if this is common =good) practice. Or should I rather tinker with bridge and tun devices? The mailing list shows many things possible (vlan, bridge, dummy), but I can't see, what the best practices are. If I can gather all th information needed, the I am willing to write some doku in the wiki at linux-vserver.org :-) Dirk, If you feel capable and have the time, I suspect many would enjoy reading a mini how to explaining the set up of a virtual LAN like you're doing. It seems like the subject comes up often enough for it to be a useful reference. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] V_xxxx not running ?
Also, it is easy to check the existing services running on a given host and to create the v_* scripts in order to make sure that no port conflict will occur between the vservers and the host. This is a general solution to this kind of problem whereas fixing each application individually can be, IMHO, a pain... Then I would suggest that perhaps you are running too many services on the host? My philosophy is to keep the host as minimal as possible and run everything inside a guest (generally one guest per service). The only two services I run on my hosts are sshd and ntpd. Every other service that I might want to run on the host can be run inside a guest. good points and excellent suggestions! thanks, Herbert Is this the official direction of the linux-vserver project? Regarding the post from about a month ago relating linux-vserver and the Solaris containers, it seems there is a huge potential for a tool that allows running virtual machines on a workstation. I ask if this is the official direction because if so, the tools will be engineered with this in mind. However, if the official direction is to allow running on stripped down hosts (ala Xen) and also general purpose workstations (ala Solaris containers) the tools will be designed more flexibly. This is just my $0.02 and food for thought. About every 12 - 18 months I switch from Windows to Linux on my desktop and this fall, when its due to happen again I plan on experimenting with a Solaris containers type of setup on my workstation. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] How to build first vserver ?
When WhiteBox Enterprise Linux is like RHEL, you should now be able to create new vservers with | # vserver ... build -m yum ... -- -d wbel4 out-of-the-box (although it is strongly recommended to patch yum). Okay - I'll try to see if I can get something up and running ... Otherwise I'll be back for more info ;-) I may be wrong, but I think that WBEL uses Yum as the backend to up2date. Up2date by default is hardwired to RH servers, so they changed it to work the same but use yum instead. I might be mixing this up with one of the other RHEL clones, so forgive me if I'm off on this. ... Ah, just confirmed: http://www.whiteboxlinux.org/faq.html WBEL does use yum, which means I'm not crazy. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] Limiting a vserver's ressources
I tried to backup my system remotely using rsync and the system load did temporarly go up to 60 (and higher). Consequently my system was not available for several hours. Therefore I would like to know how I can restrict the ressources a vserver is allowed to use (e.g. ram etc.). I know this doesn't answer your question; I don't use that feature myself. I do use rsync for my backups, and what I've noticed is that the first time I do a backup it uses a lot of system resources, especially I/O, which causes a high server load. After that, rsync doesn't take too long and there's not much additional load. You may not need the limiting features unless you will be doing a full backup every day, and if you are, don't use rsync. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
[Vserver] v2 time frame
Bertl et all, Would you be willing to guess at a release date for v2? Were planning a server upgrade and it may be wise for us to consider this when setting our dates. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
[Vserver] solaris containers/zones
I just saw this article come through the big-admin newsletter. I don't currently have any Solaris computers and I haven't used Solaris 10 (or 9 for that matter), so all I can do is read about it. This seems kind of cool and in-line with what my ideal linux-vserver usage would look like. I just use vservers to logically separate applications so that as they grow they can spin off to their own server w/out hassle. Of course, vserver is great for that because it has so little resource overhead. http://www.sun.com/bigadmin/content/submitted/dollar_container.html The feature that strikes me as so intriguing is the ability to allocate CPU resources to zones. Also, look how they create a zone for tomcat. That strikes me as a very easy to use tool (no editing config files, just use set). Not that I'm trying to critique any of the work being done on vserver; I just thought you might like a glimpse of one other way someone is doing this sort of thing. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] solaris containers/zones
I just thought you might like a glimpse of one other way someone is doing this sort of thing. hmm, you sure you know what linux-vserver 2.6/vs2.0 can do? anyway, thanks for the input! best, Herbert :-[ I guess I don't... I'm running out of hardware to experiment with, so I haven't been playing with the new stuff too much. You know, if a distro wanted to get some media attention, they could put some effort behind the vserver project and roll it into their distro as an optional module with a nice config tool. Of course, I don't know if vserver can be built as an optional module, I've only built it into a vanilla kernel, but still... they could raise a lot of hype and woo some enterprise (aka paying customer) market share, I think. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] Ubuntu Guest Image
-Original Message- From: [EMAIL PROTECTED] [mailto:vserver- [EMAIL PROTECTED] On Behalf Of Darryl Ross Sent: Thursday, April 28, 2005 8:10 PM To: vserver@list.linux-vserver.org Heyas All, Does anyone have a Ubuntu Hoary guest image built? Alternatively, is it possible to use the debian-newvserver.sh script to build a hoary vserver? I started the process of documenting using Ubuntu guests. Here is what I've done so far: http://list.linux-vserver.org/archive/vserver/msg09330.html Part C steps 6-8 might be helpful, Create the new ubuntu disk image. If you want to use debian, google for debootstrap and you should see alternate syntax to use for the debootstrap program. (i.e. to create a virtual server named vsa with the ip address 192.168.1.99 and the host name vsa.mynetwork.com use this command: vserver vsa build -m debootstrap --hostname vsa.mynetwork.com --netdev eth0 --interface 192.168.1.99/24 -- -d warty -m http://archive.ubuntulinux.org/ubuntu) Yes, I realize this is for warty, but you should get by just fine by changing the reference from warty to hoary. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
[Vserver] FW: Oracle 10g... any Production Environments on VServer?
Sadly, Postgres is missing these important features; - bitmap indexes - OLAP query re-writing I'm a big postgres fan and closely follow the performance mailing list. These features sound intriguing so I'm going to enquire about their status. Interestingly, I've heard recent discussions about both bitmap indexes and materialized views and my belief was that many people on the list are using materialized views now, though I'm not sure if that is provided by a contributed module. I'm not trying to convince you to switch to PG, I'm just curious if these features are available to me. BTW, one interesting feature that Oracle has is the ability to store hierarchical data in a flat db table and pull it out in one query. For example: It can take this data: And sort it *correctly* like this: Id Parent Name Id Name 0 Home 0 Home 1 0 Documents1 Documents 2 0 Applications 4Work 3 0 Pictures 5Personal 4 1 Work 2 Applications 5 1 Personal 6Photoshop 6 2 Photoshop7OpenOffice.org 7 2 OpenOffice.org 3 Pictures 8 3 Family 8Family This takes several queries in PostgreSQL. [Pause (always Google before you post)] Oh, I knew bitmaps were fresh in my memory: http://sql-info.de/postgresql/news/weekly-news_2005-04-24.html ... Victor Y. Yegorov's on-disk bitmap indexes, which are a new index type intended to allow indexing low-cardinality attributes on large tables. The two features together should greatly improve performance of descision support / business intelligence workloads. And: http://jonathangardner.net/PostgreSQL/materialized_views/matviews.html Materialized views are certainly possible in PostgreSQL. Because of PostgreSQL's powerful PL/pgSQL language, and the functional trigger system, materialized views are somewhat easy to implement. Thanks for describing these features; they look like areas where I can improve some aspects of my application. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
[Vserver] partial vserver 1.9.5 setup instructions
for debootstrap and you should see alternate syntax to use for the debootstrap program. (i.e. to create a virtual server named vsa with the ip address 192.168.1.99 and the host name vsa.mynetwork.com use this command: vserver vsa build -m debootstrap --hostname vsa.mynetwork.com --netdev eth0 --interface 192.168.1.99/24 -- -d warty -m http://archive.ubuntulinux.org/ubuntu) After much installing and configuring you will be prompted with a message similar to I: Base system installed successfully. which means your vserver is setup. Start the vserver named vsa by running the command vserver vsa start Enter the vserver named vsa by issuing the command vserver vsa enter -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.elitecms.com ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
Re: [Vserver] Linux Vserver - Feature Question
On Thu, Mar 31, 2005 at 09:22:10PM -0600, Matthew Nuzum wrote: I think I can create a test case for this. I have a server that is not currently running any vserver stuff that will be ok with a reboot now and then. sounds good, please try to get 1.9.5.5 working there, because it already contains some blkio accounting and it would be very interesting to monitor those values ... (maybe with rrdtools) TIA, Herbert I'm still doing my month-end backup, but when that's done I'll start installing the vserver 1.9.5.5. Here is the test case that seems most logical to me, but advice on how to actually do concrete tests would be useful. 1. Create two vservers (vsa and vsb), start both. 2. In vsa start some heavily i/o intensive operation 3. In vsb try to do some tasks and notice how much i/o bandwidth I have available. Alternative plan: 1. Create 1 vserver and start it 2. In the vserver, start some heavily i/o intensive operation 3. In the host server try to do some tasks and notice how much i/o bandwidth I have available 4. After step 2 completes, in host server start a heavily i/o intensive operation 5. In vserver, try to do some tasks and notice how much i/o bandwidth I have available I have two ideas on heavily i/o intensive operation 1. I have a database with 35 million records. Doing any aggregate function such as max() requires several sequential scans and takes a significant amount of time. 2. Preparing my month end backup requires copying 13 GB of data. Any other suggestions? Question: I have only subjectively noticed a dramatic decrease in server performance when a vserver is performing i/o intensive tasks. How can I objectively measure and produce concrete numbers? -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] Linux Vserver - Feature Question
I would also keep measurements of CPU ticks used. Since IO requires CPU cycles - is it possible that a CPU sched_hard indirectly limits IO just as well? Grisha How do you do that? P.S. I'm still compiling the vanilla kernel (I haven't even applied the vserver patch yet). At this rate I'll probably get back to you on Sunday. FYI Pii 350 MHz, 128 MB RAM, Ubuntu 4.1, 120 GB UDMA 133 hard drive. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [RE:] Re: [Vserver] Linux Vserver - Feature Question
I do think that this would be an interesting feature. http://www.theshore.net/~caker/uml/patches/ (seems to have updated patches regarding this stuff) http://www.theshore.net/~caker/uml/patches/token-limiter.README will look into it .. anybody volunteering to test such stuff? TIA, Herbert I think I can create a test case for this. I have a server that is not currently running any vserver stuff that will be ok with a reboot now and then. I don't monitor this list that closely these days, so jog me when there's something ready for me to test. -- Matthew Nuzum [EMAIL PROTECTED] www.followers.net - Makers of Elite Content Management System View samples of Elite CMS in action by visiting http://www.followers.net/portfolio/ ___ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
Re: [Vserver] cpu limits clone vservers
On Tue, 2004-11-23 at 12:47 -0500, Gregory (Grisha) Trubetskoy wrote: On Tue, 23 Nov 2004, [iso-8859-1] J?rn Engel wrote: What most people want in plain English: o Every user gets some guaranteed lower bound. o Sum of lower bounds doesn't exceed total resources. o Most of the time, not all resources get consumed. Add them to the 'leftover' pool. o Users that demand more resources than their lower bound get serviced from the leftover pool. o Users that, on average, use less resources get a higher priority when accessing the leftover pool. ...and the big challenge is - how do you apply this to memory usage? Grisha This would be a cool thing. We could squabble over the details, but if it did what you said above and left some room for tweaking I'll bet people would be [even more] pleased [though we are already ecstatic now] with the vserver project. Of course, I'm still using CTX 17, so I'm pretty easy to please I guess. I'd be curious to know what happens when there is contention for that pool of RAM. I've got a nightly batch job that lasts 15 minutes but uses most of the server's ram during the process. Right now, everything works OK, but I suspect under this vserver panacea edition I would have problems because idle vservers will be allocated their minimum ram even though they don't need it. I guess I could just allocate 4MB of RAM as the minimum or some other small number to get the effect of what I do now... still, a bit thought provoking. Keep up the interesting conversation and work, -- Matthew Nuzum | Makers of Elite Content Management System www.followers.net | View samples of Elite CMS in action [EMAIL PROTECTED] | http://www.followers.net/portfolio/ ___ Vserver mailing list [EMAIL PROTECTED] http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] Mailing List Future ...
so, now the questions I'd like to get answered: 1) do we want an open mailing list (like lkml) instead of a closed (subscription only) list I subscribe and so does everyone who got this message (since you sent it to the list) so I suspect this will not have much impact on us who are using the list now. All of the big lists I participate in require subscription. The vserver list is relatively low traffic so why not subscribe? If people are concerned, a wiki page can be created that explains how to subscribe in digest mode if they prefer it (and if it's available) My vote is to go ahead and make it a closed subscription 2) do we want martin to maintain and further improve the existing solution Martin is doing a fine job. Martin, just so you know, being a mailing list administrator is apparently like being the sound guy in a performance... no one even knows you're there unless there's a problem. Keep up the good work. 3) are we able to tolerate/ignore the unavoidable spam every day/week/month The SPAM level is low and certainly tolerable. Please, folks, if we decide to keep the list open, just ignore the spam and don't reply to it. 4) do we want the mailing list to become a medium of communication and cooperation for linux vserver Yes, of course. It is archived and readily accessible using Google. There is no better medium than this for finding help. Matthew Nuzum | ISPs: Make $200 - $5,000 per referral by www.followers.net | recommending Elite CMS to your customers! [EMAIL PROTECTED] | http://www.followers.net/isp ___ Vserver mailing list [EMAIL PROTECTED] http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] [Release] vs1.00, vs1.22 and vs1.3.3 for 2.4.24
Time outs like that often mean dns related problems. Have you added the proper dns settings to /etc/resolv.conf in the vserver? If so, does your mailserver run in a chroot jail? (like postfix) If so, you need to copy the resolv.conf settings to the jail or your mailserver will not know about them. If you're using postfix, it might be: /var/spool/postfix/etc/resolv.conf That problem can be very frustrating and hard to track down. BTW, if it's not dns related, the next most likely problem is routing, but I've never seen that happen in a vserver. HTH, Matthew Nuzum | ISPs: Make $200 - $5,000 per referral by www.followers.net | recomending Elite CMS to your customers! [EMAIL PROTECTED] | http://www.followers.net/isp -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Alexander Goeres Sent: Tuesday, January 06, 2004 1:58 PM To: [EMAIL PROTECTED] Subject: Re: [Vserver] [Release] vs1.00, vs1.22 and vs1.3.3 for 2.4.24 Hi Christian! Could you describe how this problem looked like? I have a mail-sending problem too and have absolutely no idea anymore, how to solve it: A mailserver running on a vserver on a 2.4.23-vs1.21-host can't contact one single remote mailserver (only 1 :-\). Connection always times out... and that's it. works well with all other mailservers. A telnet to port 25 from the host itself to this single mailserver times out equally.. could this be a vserver-related problem? I'd never thought of that.. Greetings Alexander Am Dienstag, 6. Januar 2004 14:22 schrieb Christian Mayrhuber: The IPV4 bug is in vserver 1.00, but fixed in vserver 1.22, right? Recently, I had problems to send mail to a machine behind a netfilter firewall from a machine with a vserver 1.00 kernel. The firewall did not complain about corrupted packets, but the smtp server behind the firewall did. This happened with a ctx17 kernel, too. Things worked fine with a standard kernel. -- --- agoeres _at_ lieblinx.net tel.: +49 (0)30 / 61 20 26 87 fax: +49 (0)30 / 61 20 26 89 --- lieblinxNET we do software a Marwood Thiele GbR --- reichenberger straße 125 10999 Berlin http://lieblinx.net --- ___ Vserver mailing list [EMAIL PROTECTED] http://list.linux-vserver.org/mailman/listinfo/vserver ___ Vserver mailing list [EMAIL PROTECTED] http://list.linux-vserver.org/mailman/listinfo/vserver
RE: [Vserver] Vserver + OpenMosix...
Be careful. You're only comparing the upfront sticker price. If you can double or triple the capacity of your mailserver (I'll bet you can) and minimize the complexity of the solution (openmosix + vserver integration + multiple boxes (multiple points of failure) sounds very complex to me), I'll bet you find the TCO of the solution flip flop with SCSI being much lower than IDE. A parallel example: I recently consulted with a fellow who was trying to run a 25,000 box mailserver on a series of aggregated DSL lines. It was easy work to show him that the TCO for a burstable T3 line was much lower than that of multiple DSL lines, even though the sticker price indicated the opposite. Matthew Nuzum | Makers of Elite Content Management System www.followers.net | View samples of Elite CMS in action [EMAIL PROTECTED] | http://www.followers.net/portfolio/ -Original Message- From: [EMAIL PROTECTED] [mailto:vserver- [EMAIL PROTECTED] On Behalf Of Lus Miguel Silva Sent: Sunday, November 09, 2003 3:26 PM To: [EMAIL PROTECTED] Subject: RE: [Vserver] Vserver + OpenMosix... Hello Mat, I know that SCSI has better performance then IDE...but...analizing the price it just doenst compensate! I can only get about 60gb SCSI disk for the price i can get a 200gb IDE disk (more or less). We used to use SCSI disks but with the hdd inovations on the last years we realised that its a waste of money (in our case) to buy scsi! Thanks, Lus -Mensagem original- De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] nome de Matthew Nuzum Enviada: domingo, 9 de Novembro de 2003 20:12 Para: [EMAIL PROTECTED] Assunto: RE: [Vserver] Vserver + OpenMosix... We have been working on an OpenMosix cluster in the computer club at the school where I'm taking classes now. I've found that the server applications that I typically use do not benefit from openmosix. The applications commonly fall into either of two categories: a) I/O bound applications that only slow down when migrated to a different node on the cluster, or b) Applications that are incompatible with Mosix for various reasons (threaded, shmem, device dependent etc.) such as Database software, Apache and other server processes. I think the audience of people who can legitimately benefit from a combined vserver/mosix installation is rather small. For those that have heavily loaded servers, why not just put fewer vservers on a server? If 6 is too many, just do 4 or 5. If you have extra boxes with spare cpu cycles, put the vserver there. Honestly, if your mailserver setup is too slow, I'm certain you can get better performance by switching from IDE disks to SCSI. In my recent tests, I/O tasks on IDE drives kept the CPU at about 53% utilization. Same tests on SCSI disks used only 14% utilization with the I/O processes taking significantly less time to complete on the SCSI. That was a system with a single IDE drive compared to the same system with a single SCSI drive. This is common knowledge among hardware people as the IDE subsystem uses system resources for the bulk of I/O where SCSI cards were designed to handle the I/O work much the same way a video card handles graphics work. Matthew Nuzum | ISPs: Make $200 - $5,000 per referral by www.followers.net | recommending Elite CMS to your customers! [EMAIL PROTECTED] | http://www.followers.net/isp -Original Message- From: [EMAIL PROTECTED] [mailto:vserver- [EMAIL PROTECTED] On Behalf Of Lus Miguel Silva Sent: Sunday, November 09, 2003 12:18 PM To: [EMAIL PROTECTED] Subject: RE: [Vserver] Vserver + OpenMosix... Yes, my server is heavily loaded. I have 2 IDE disks at 7200rpm, doing raid1. The big load comes (mainly) from the mail server (when users use imapd thru the webmail). I use kernel 2.4.21 + ctx17. I really dont believe in SMP solutions. It is far more expensive then setting up a cluster. In the past we (at my university) invested in dual processor boards but now we are convinced that it is not a $good$ $solution$ (heheh). According to the funcionality of how the openmosix kernel works (imho) it would be the best solution to load balance vservers. The vserver project is great for low'cost production servers and...*SECURITY*! I think that if you would be able to get us vserver'users a cluster'like solution...it would be the BEST system administration project *ever*! Best, +- | Lus Miguel Silva | Network Administrator@ ISPGaya.pt | Rua Antnio Rodrigues da Rocha, 291/341 | Sto. Ovdio 4400-025 V. N. de Gaia | Portugal | T: +351 22 3745730/3/5 F: +351 22 3745738 | G: +351 93 6371253 E: [EMAIL PROTECTED] | H: http://lms.ispgaya.pt/ +- -Mensagem original- De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED
RE: [Vserver] 1.0 release - I agree!
questions: how could i create a vserver by using link instead of copy so that i could share the disk space? cheers, charles Charles, forgive me if I misunderstood your question, I am by no means an expert at setting up vservers. However, regarding this issue, if you do cp -al file1 file2 (that's lower case A L ) it simply makes a hardlink from file1 to the other. That way, you can make links from the comfort of your copy command. Matthew Nuzum | ISPs: Make $200 - $5,000 per referral by www.followers.net | recomending Elite CMS to your customers! [EMAIL PROTECTED] | http://www.followers.net/isp ___ Vserver mailing list [EMAIL PROTECTED] http://list.linux-vserver.org/mailman/listinfo/vserver
