Discuss October 2005

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266 participants
334 discussions

Why not use yum mirrorlist= instead of baseurl= in CentOS-Base.repo
by Adam Gibson 17 Oct '05

17 Oct '05

Currently the default yum configuration references mirror.centos.org. When yum looks up the IP address it finds several but it will only try one and fail if that server is down or does not have the headers for whatever reason. If yum were to reference a mirrorlist it would skip servers that fail and keep trying them all until it finds one that works or exhausts all the mirrors. Centos would host a file on their web server for each repository that has a list of mirror baseurls. I created a test script to generate mirrorlists from the mirror.centos.org DNS lookup and changed yum to reference the local files that were generated as a mirrorlist= and it worked. The non-synced servers that did not have the correct directories setup were skipped and it found servers that did work. Are there any plans to provide a centos-yumconf rpm that links to a mirrorlist on centos.org instead of just using the DNS round-robin of mirror.centos.org which will cause yum to fail if it happens to get an IP that does not work? Centos would just need to change the mirrorlist file on the main website to change mirrors for clients. Each mirror would need to have a DNS entry of its own but it would make things work better for updates when 1 server is not synced properly or has some other problem(down, etc). ---- begin gen-centos-mirrorlist.sh script ---- #!/bin/sh host mirror.centos.org | grep " has address " | cut -f 4 -d " " | \ sed "s#.*#http://\0/centos/4/updates/i386/#" > \ /etc/centos-mirror-updates.list host mirror.centos.org | grep " has address " | cut -f 4 -d " " | \ sed "s#.*#http://\0/centos/4/os/i386/#" > /etc/centos-mirror-base.list host mirror.centos.org | grep " has address " | cut -f 4 -d " " | \ sed "s#.*#http://\0/centos/4/addons/i386/#" > \ /etc/centos-mirror-addons.list host mirror.centos.org | grep " has address " | cut -f 4 -d " " | \ sed "s#.*#http://\0/centos/4/extras/i386/#" > \ /etc/centos-mirror-extras.list host mirror.centos.org | grep " has address " | cut -f 4 -d " " | \ sed "s#.*#http://\0/centos/4/centosplus/i386/#" > \ /etc/centos-mirror-centosplus.list ---- end generation script ---- ---- begin changed CentOS-Base.repo yum configuration ---- [base] name=CentOS-$releasever - Base #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/ mirrorlist=file:///etc/centos-mirror-base.list gpgcheck=1 #released updates [update] name=CentOS-$releasever - Updates #baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/ mirrorlist=file:///etc/centos-mirror-updates.list gpgcheck=1 #packages used/produced in the build but not released [addons] name=CentOS-$releasever - Addons #baseurl=http://mirror.centos.org/centos/$releasever/addons/$basearch/ mirrorlist=file:///etc/centos-mirror-addons.list gpgcheck=1 #additional packages that may be useful [extras] name=CentOS-$releasever - Extras #baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/ mirrorlist=file:///etc/centos-mirror-extras.list gpgcheck=1 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-$releasever - Plus #baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/ mirrorlist=file:///etc/centos-mirror-centosplus.list gpgcheck=1 enabled=0 NOTE: My hack with using IPs from mirror.centos.org has the flaw in that the http servers in the list files are referenced by IP. If the mirror http server is using a Name Virtual Host and centos is not the default web site for that IP then it might try pulling the files from the wrong configured virtual host on that mirror. This might make some mirrors not work.

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php4/php5
by Wayne 16 Oct '05

16 Oct '05

Hey Guys, I need to run PHP4/PHP5 from the same physical server. I have apache + php5 currently. Im thinking of creating a new apache and php4 from srpms and installing It all in say /opt/apache_php4 and then running it from its own IP since The server has two external IP addresses available. Just wondering if anybody here has needed to do the same in the past and what did you do to achieve running them both from the same server? Thanks, Wayne

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CentOS Network Exception
by Yasunari Tosa 15 Oct '05

15 Oct '05

Hi, The following exception occurred. The system was upgraded from RedHat 9 Legacy (updated regularly using Fedora Legacy project) to CentOS 4.1 (Linux 2.6.9-11). When I installed yum and yum-conf, I had a problem of yum not getting $releasever. Thus I hand edited /etc/yum.repos.d/CentOS-Base.repo $releasever to 4. I did the full update using yum. Now up2date gets the following exception. I don't understand why it is looking for CNS-CA-CERT. Exception type exceptions.ValueError Exception Handler Information Traceback (most recent call last): File "/usr/share/rhn/rhn_applet/rhn_applet.py", line 586, in refresh self.model.refresh(force) File "/usr/share/rhn/rhn_applet/rhn_applet_model.py", line 447, in refresh source.refresh(force) File "/usr/share/rhn/rhn_applet/rhn_applet_source.py", line 35, in refresh self._do_refresh() File "/usr/share/rhn/rhn_applet/rhn_applet_rpc.py", line 190, in _do_refresh server = self.create_server() File "/usr/share/rhn/rhn_applet/rhn_applet_rpc.py", line 83, in create_server s.add_trusted_cert(self.__cert__) File "/usr/lib/python2.3/site-packages/rhn/rpclib.py", line 440, in add_trusted_cert self._transport.add_trusted_cert(certfile) File "/usr/lib/python2.3/site-packages/rhn/transports.py", line 253, in add_trusted_cert raise ValueError, "Certificate file %s is not accessible" % certfile ValueError: Certificate file /usr/share/rhn/CNS-CA-CERT is not accessible

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Possible to install centos keeping folders intact?
by Ian mu 15 Oct '05

15 Oct '05

Hiya all, just going to do a couple of quick conversions from redhat to centos, an going to back up the folders anyway. But basically just wondering if there's a way to install centos and keep some rather large folders intact without having to backup/restore them. They are based from the root folder, i.e /home but they aren't on a separate partition and want to do a total new install from cd on it. No problem if there is no way, just thought I'd ask to see if anyones ever gone down that route if it is (and yes bad partitioning in the first place! Partly for exactly this reason and others). Thanks in advance, Ian

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Re: yum issues
by Paul Vandenberg 15 Oct '05

15 Oct '05

I found the best way to get yum working was to manually upgrade yum along with its dependencies and then do a yum upgrade to upgrade to CentOS 4.2. With the high traffic, it still bombs a few times. But it doesn't take as long. The new Yum 2.4 is way faster than Yum in CentOS 4.1. Paul

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yum issues
by Craig White 15 Oct '05

15 Oct '05

Is this because the mirrors are busy? I did update to CentOS 4.2 yesterday but now... [root@srv1 file-4.15]# yum install php-devel php-imap Setting up Install Process Setting up repositories dag 100% |=========================| 1.1 kB 00:00 Cannot open/read repomd.xml file for repository: update failure: repodata/repomd.xml from update: [Errno 256] No more mirrors to try. Error: failure: repodata/repomd.xml from update: [Errno 256] No more mirrors to try. [root@srv1 file-4.15]# yum clean cache Cleaning up pickled cache 0 cache files removed [root@srv1 file-4.15]# yum clean metadata Cleaning up xml metadata 1 metadata files removed [root@srv1 file-4.15]# yum install php-devel php-imap Setting up Install Process Setting up repositories dag 100% |=========================| 1.1 kB 00:00 Cannot open/read repomd.xml file for repository: update failure: repodata/repomd.xml from update: [Errno 256] No more mirrors to try. Error: failure: repodata/repomd.xml from update: [Errno 256] No more mirrors to try. Suggestions? Wait? Craig -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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4.2 upgrade and kernels
by Collins Richey 15 Oct '05

15 Oct '05

Just curious about kernel requirements after the upgrade. I've been running the 2.6.9-11.106.unsupported kernel for some time. Now I see that the base kernel is up to 2.6.9-22.EL. Are there any plans to upgrade the unsupported kernel? Should I be using the newer kernel after the upgrade? Does it make any difference? Not trying to be pushy; just looking for information. Thanks for all the good work, and tons of it. -- Collins Richey Debugging is twice as hard as writing the code ... If you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. -Brian Kernighan

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Mirror
by Sam Drinkard 15 Oct '05

15 Oct '05

What would be the minimum requirements for a mirror for the CentOS distributions? I've got some resources that I might be able to utilize to help out. Can someone respond to me offline where we can discuss? Sam -- Snowman

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yum update problems
by William Warren 15 Oct '05

15 Oct '05

I am running 4.1. I have all proxies out of the way. One machine does the following: [root@enoch ~]# yum update Setting up Update Process Setting up Repos dag 100% |=========================| 1.1 kB 00:00 update 100% |=========================| 951 B 00:00 base 100% |=========================| 1.1 kB 00:00 addons 100% |=========================| 951 B 00:00 extras 100% |=========================| 1.1 kB 00:00 Reading repository metadata in from local files dag : ################################################## 2605/2605 update : ################################################## 16/16 base : ################################################## 1406/1406 extras : ################################################## 33/33 Resolving Dependencies --> Populating transaction set with selected packages. Please wait. ---> Package openssl.i686 0:0.9.7a-43.4 set to be updated ---> Package util-linux.i386 0:2.12a-16.EL4.12 set to be updated --> Running transaction check --> Processing Dependency: pam >= 0.77-66.8 for package: util-linux --> Processing Dependency: libaudit.so.0 for package: util-linux --> Finished Dependency Resolution Error: Missing Dependency: pam >= 0.77-66.8 is needed by package util-linux Error: Missing Dependency: libaudit.so.0 is needed by package util-linux Mind you both pakcages ae actually installed. For the other machine i get: [root@joshua ~]# yum update Setting up Update Process Setting up Repos dag 100% |=========================| 1.1 kB 00:00 update 100% |=========================| 951 B 00:00 base 100% |=========================| 1.1 kB 00:00 addons 100% |=========================| 951 B 00:00 extras 100% |=========================| 1.1 kB 00:00 Reading repository metadata in from local files primary.xml.gz 100% |=========================| 919 kB 00:00 MD Read : ################################################## 2605/2605 dag : ################################################## 2605/2605 primary.xml.gz 100% |=========================| 4.2 kB 00:00 MD Read : ################################################## 16/16 update : ################################################## 16/16 primary.xml.gz 100% |=========================| 466 kB 00:00 http://mirror.centos.org/centos/4/os/i386/repodata/primary.xml.gz: [Errno -1] Metadata file does not match checksum Trying other mirror. Error: failure: repodata/primary.xml.gz from base: [Errno 256] No more mirrors to try. I have used yum clean all and rebooted. no dice. Any ideas? -- My "Foundation" verse: Isa 54:17 No weapon that is formed against thee shall prosper; and every tongue that shall rise against thee in judgment thou shalt condemn. This is the heritage of the servants of the LORD, and their righteousness is of me, saith the LORD. -- carpe ductum -- "Grab the tape" CDTT (Certified Duct Tape Technician) Linux user #322099 Machines: 206822 256638 276825 http://counter.li.org/

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Wherefore SELinux?
by Benjamin Smith 15 Oct '05

15 Oct '05

I've tried to wrap my head around SELinux several times, and so far, all I've managed to do is rap my head, and then somewhat painfully. Is there a detailed "SELinux Unleashed" style book anybody can recommend? Anybody read Oreilly's book care to comment? Link: http://search.barnesandnoble.com/booksearch/isbnInquiry.asp?userid=XS0ILLMC… (Free resources preferred, but quality and readability comes first!) -Ben -- "The best way to predict the future is to invent it." - XEROX PARC slogan, circa 1978

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Discuss October 2005