Discuss October 2009

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Centos v3.3 CD 2
by Luis-Miguel Astudillo 15 Nov '11

15 Nov '11

Sorry, I have been away for a while. has anyone fixed CD2 fotr CentOS v3.3 ? -- Luis

6 7

Lingering dhclient issue
by Alfred von Campe 22 Jun '11

22 Jun '11

I recently reconfigured some CentOS 4.3 systems that were using DHCP to use static IP addresses. At the same time, the systems were moved to a new VLAN. Here is the approximate sequence of events that took place: 1. ifdown eth0 2. edit /etc/sysconfig/network-scripts/ifcfg-eth0 with static IP address 3. wait for network folks to reconfigure switch 4. ifup eth0 I may have reversed steps 1 and 2 on some of the systems. The problem was that the dhclient process didn't go away, and kept renewing the old lease. Our DHCP server is configured to contact the DNS server and update the entry for each host it serves. So the DNS entries for these systems were pointing to the old address in the old VLAN. The eth0 interface itself just kept the static IP address for which it was configured. It took me a while to figure out what was going on. My question is, what could I have done to avoid this (other than killing the dhclient process)? Is there a better way to reconfigure an interface to use a static address? I am not interested in solutions that involve using a GUI (i.e., only command line solutions). Thanks, Alfred

9 17

what pkg contains libstdc++-libc6.2-2.so.3
by Fong Vang 02 Feb '11

02 Feb '11

In CentOS 4.1/2, what package contains this library: libstdc++-libc6.2-2.so.3? I installed a couple of the compat- packages, but this library is still missing.

8 8

Centos-release srpm
by Tom Diehl 22 Apr '10

22 Apr '10

Hi, Does anyone know where I can get centos-release-5-4.el5.centos.1.src.rpm? I have looked on several mirrors and that one seems to be MIA. Even Google does not seem to know where it is. I need it so I can rebuild it with my local yum repos in it. Regards, -- Tom Diehl tdiehl(a)rogueind.com Spamtrap address mtd123(a)rogueind.com

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openfiler (was: using CentOS as an iSCSI server?)
by Alan McKay 07 Apr '10

07 Apr '10

> Simple, it's only a NAS device, and not really a file server / web > server / data base server as well. Here is something I am currently lokoing at, and wondering if you'd considered it or if anyone here has done it. I've got a bunch of existing hardware - really good IBM stuff that is all installed with CentOS (with a few exceptions). We want to move to virtualization, but the direct-attached storage is a bit of an issue because with VMWare ESXi you cannot do some of the fancy stuff like "VMove" (moving a live running server from one host to another). So of course Openfiler comes to mine. However, most of this hardware has pretty significant CPU and RAM horsepower, so just running it as openfiler would be quite wasteful. What I se some people doing is - install ESXi (4.0) onto the bare metal - install openfiler as a virtual machine - give open filer all the disk - serve the disk out to other VMs via openfiler This may seem redundant vs just doing it without openfiler, but as mentioned a lot of the fancy features you only get with virtualized disk. I am about to do some benchmarks on this stuff to see what percentage of performance I give up for doing it this way. -- “Don't eat anything you've ever seen advertised on TV” - Michael Pollan, author of "In Defense of Food"

9 22

Don't forget to use torrents for your downloads!
by William L. Maltby 23 Feb '10

23 Feb '10

For those who may forget, usin torrents to download and share the new images will get you faster downloads (if enough folks participate) if you have a "fat" pipe and alleviate the load on the CentOS servers. I have a "chubby" pipe (~ 1.2MB/sec) and got the stuff really quickly earlier today. If your torrent has distributed hash table capability, I suggest that you also use that feature. Happy sharing! -- Bill

18 26

update of openssh-server i386 4.3p2-36.el5, dependencies
by zagiatakrapovic＠gmx.ch 21 Jan '10

21 Jan '10

thx for your help Filipe, I see the point! unfortunately I got the same for ecryptfs-utils until now no GTK stuff was needed... now even if I try your hint > yum update ecryptfs-utils I think the trousers rpm is pulling the whole stuff. Until now I didn't had to install trousers. output: --------------- Dependencies Resolved ============================================================================= Package Arch Version Repository Size ============================================================================= Updating: ecryptfs-utils i386 75-5.el5 updates 157 k Installing for dependencies: atk i386 1.12.2-1.fc6 base 222 k cairo i386 1.2.4-5.el5 base 394 k cups-libs i386 1:1.3.7-8.el5_3.6 updates 193 k fontconfig i386 2.4.1-7.el5 base 174 k freetype i386 2.2.1-21.el5_3 updates 310 k gnutls i386 1.4.1-3.el5_3.5 updates 348 k gtk2 i386 2.10.4-20.el5 base 6.5 M hicolor-icon-theme noarch 0.9-2.1 base 25 k keyutils i386 1.2-1.el5 base 36 k libX11 i386 1.0.3-9.el5 base 795 k libXau i386 1.0.1-3.1 base 18 k libXcursor i386 1.1.7-1.1 base 32 k libXdmcp i386 1.0.1-2.1 base 19 k libXext i386 1.0.1-2.1 base 35 k libXfixes i386 4.0.1-2.1 base 14 k libXft i386 2.1.10-1.1 base 44 k libXi i386 1.0.1-3.1 base 25 k libXinerama i386 1.0.1-2.1 base 9.7 k libXrandr i386 1.1.1-3.1 base 15 k libXrender i386 0.9.1-3.1 base 27 k libjpeg i386 6b-37 base 139 k libpng i386 2:1.2.10-7.1.el5_3.2 updates 241 k libtiff i386 3.8.2-7.el5_3.4 updates 306 k pango i386 1.14.9-5.el5.centos updates 335 k trousers i386 0.3.1-4.el5 base 308 k xorg-x11-filesystem noarch 7.1-2.fc6 base 5.4 k Transaction Summary ============================================================================= Install 26 Package(s) Update 1 Package(s) Remove 0 Package(s) -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

6 5

stock openjdk vs. epel
by Les Mikesell 07 Jan '10

07 Jan '10

If you have the epel repo installed and enabled during a yum update, you get java-1.6.0-openjdk-1.6.0.0-1.0.b12.el5.2 instead of the stock .b09 version. Is this intentional and desirable? I thought epel generally did not replace stock components with newer versions. -- Les Mikesell lesmikesell(a)gmail.com

12 32

Missing virtio-win in CentOS 5.4
by Sebastian Marten 26 Dec '09

26 Dec '09

Hello, I Installed 5.4 on a test system to use KVM, but i didn't find the "virtio-win" package with the Windows drivers. -> http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.4/html/Virtuali… Is this a CentOS or Upstream Problem? Regards, Sebastian

6 5

Keeping iptables in sync across multiple machines
by Karanbir Singh 17 Nov '09

17 Nov '09

hi, Just wondering what people use / recommend to keep multiple machines in sync with their iptables policy. What I use at the moment: 1) Puppet, to setup and manage a fairly complex per service type ruleset that is then maintained on the remote machines by puppet ( in that it brings together all the various bits of iptables snippets based on what manifests and roles are deployed to a machine, then builds a firewall locally on the mchine ). We also use something similar, but at a much simpler level within the .centos.org infrastructure. Problem with this is that unless one is familliar with the whole stack of machine state/policy management, its quite intimidating. Which then means that there is plenty of breakage, which in turn then means I need to maintain and run a complete set of VM's that emulate the production environment ( including their IP's ) and run cross VM tests before stuff gets rolled out. So yes, large hole and lots of potential for non-related issues to impact release. Some people even argue that having a release based workflow for firewall's is not good, I'd like to disagree :) 2) In another setup, I use puppet to basically just manage static /etc/sysconfig/iptables files. Pretty low tech, and very easy to cause damage since testing-rollout-deploy is impossible. But the other guy who also needs to manage these seems to find it easy. 3) Yet another setup I've used in the past was with a svn repo and using a post-commit hook, run some tests followed by clusterssh! to deploy the iptables files and restart services. Finally replaced that with a slack based deployment, since that allowed me to atleast run some santity tesing and rollback if I ended up locking 'core' host. The problem ofcourse was that its not easy to test remote inbound connections this way ( without using a proxy, but then the proxy creates another layer of problems and flakyness ). 4) Physically logging into machines to make policy changes(!) I do this for my laptop's :) 5) Using a 'git pull' from cron on a bunch of machines, and using a central git repository. Each machine would then do a iptables reload, the only advantage of this over (3) is that I can use metainfo like TAG's and ROLE's in the commit log's, and have only specific machines react to specific changes. Flip side: needing to track and build a knowledgebase around these TAG's meant that I almost never ever use this, and prefer to just have firewall policy that mostly works for the whole set of machines I run this on. So, what I am looking for really is feedback on what people are using in the wild on multiple machines, and bonus points for people who only use tools and mechanisms already built into the CentOS [base] repo. - KB

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Discuss October 2009