Discuss December 2010

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278 participants
226 discussions

Building packages using RPMBUILD
by Keith Roberts 19 Dec '10

19 Dec '10

I have been following the MaximumRPM guide from here: http://www.rpm.org/max-rpm-snapshot/index.html and it seems a bit dated, but still very good (if fact the best all round documentation I have found so far) on using RPM package manager, and how to build rpm packages. The guide tells me to use the original paths, yet Centos wiki says otherwise. [rpmbuilder@karsites sox]$ rpm -iv ./sox-12.18.1-1.src.rpm error: cannot write to %sourcedir /usr/src/redhat/SOURCES Is there a package I need to install and run to set things up corectly? I have created a user called 'rpmbuilder' under my home dir, and created the rpmbuild dirs under that. So what build dir shall I go for? Kind Regards, Keith Roberts -- In theory, theory and practice are the same; in practice they are not. This email was sent from my laptop with Centos 5.5

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how to install Linux on an IBM xserver 335 server without graphics card?
by Rudi Ahlers 19 Dec '10

19 Dec '10

Hi All, I recently got some IBM Xseries 335 servers 2nd hand, and noticed they don't have any graphics card. Some google searched indicate they only have an uplink port, which you could connect to another (other model) IBM server and use that as the head node. But, I don't have one available. It has 2x GB NIC's, and what looks like a management port, but I can't figure out how to use it. SSH & HTTP connections to it was futile. OR, it was assigned a dedicated IP, on a different subnet than ours but it's not written down anywhere so I don't know what IP to connect to. Does anyone know how to get Linux installed onto these devices? We have a PXE server in the office which I generally use for this setting up servers over the LAN, but they always have a VGA port. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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VPN for iPad
by Ed Warner 19 Dec '10

19 Dec '10

What is the best VPN solution for both PC and iPad? I was told that OpenVPN won't work for iPad. Ed Warner

4 3

google chrome "big brother"
by S Mathias 19 Dec '10

19 Dec '10

Google Chrome Terms of Service(Google Chrome executable), BSD (source code and Chromium executable except chromium 5 beta),BSD License with proprietary parts (source code and chromium 5 beta executable, as it integrates Adobe Flash Player 10.1[1])[2] http://en.wikipedia.org/wiki/Google_Chrome in my interpretation, this means Google Chrome is fully open-source, only the flash player has proprietary codes. am i right, or i'm missing something? i would be happy if someone could correct me. thank you!! *ps.: because "they" say google is the "big brother"

4 3

Best way to set up for PHP websites
by Ruslan Sivak 19 Dec '10

19 Dec '10

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I am looking to set up a CentOS server for hosting a high traffic PHP site (specifically Drupal 6). I am trying to figure out what's the best way of setting up PHP. The standard mod_php seems to not be a good solution, as it requires apache to be in the prefork configuration, due to PHP not being thread safe. Something like mod_fcgi seems to be the way to go, but I can't seem to find a good guide on setting it up. I installed Zend Server, but seems like they are only supporting FastCGI for Apache on Windows, and only mod_php on Linux. Their admin control panel is using lighttpd and mod_fcgi on Linux. I getting it to work with Apache, but am having issues with the missing mysqli libraries. Is it recommended to use mod_fcgi on CentOS? Is there a way to get it to work with Zend Server? If not, should I try to get things working with lighttpd? I'm not sure how easy it would be to set up a config to work with Drupal. Russ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iD8DBQFNC/vIGUZBYlCheYcRAt1cAKC7c6QwD/DDAF0hgxhEi61GvLShPgCeOLLG JotWBicyAWvsDaAPyX7I1Jo= =dQWS -----END PGP SIGNATURE-----

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CentOS 5.5 Sofware RAID1
by Matt 19 Dec '10

19 Dec '10

I have the CentOS 5.5 install DVD and trying to install with software RAID1 on two 2TB SATA drives. The CentOS install only sees one drive. This is a Supermicro motherboard with fakeraid turned off in bios. I tried the trick like so: dd if=/dev/zero of=/dev/sda bs=512 count=64 dd if=/dev/zero of=/dev/sdb bs=512 count=64 Still no go. linux rescue console does see both sda and sdb. Whats going on?

3 4

Re: [CentOS] Intel NIC
by Peter Larsen 19 Dec '10

19 Dec '10

Have you considered looking into redhat enterprise virtualization? If you are interested I can put you in touch with a redhat rhev representative? Lamar Owen <lowen(a)pari.edu> wrote: >On Saturday, December 18, 2010 04:19:25 am Gerhard Schneider wrote: >> The problem with VMWare Server is that it is a discontinued product for >> longer time and they don't provide us with a suitable replacement. > >VMware wants more people to get hooked on vSphere, so their 'suggested' VMware GSX^H^H^HServer replacement is vSphere Hypervisor, aka ESXi Free Edition. If you have suitable hardware you will get better performance with ESXi, but to get any of the more advanced functionality will require $$$ and vCenter Server. > >I have been looking at transitioning from VI3 (vCenter Server 2.5 and ESX 3.5) to something else; the price of vSphere 4 is simply too large to justify, and, while I have a valid license for vCenter Server Standard 4, I don't for ESX4 (it is a long story, and involves some rather precise timing of a difference in purchase and support dates for our original VI3 purchase, done in two phases). If I had a valid license for the full vSphere 4, I'm still not sure I'd run it, as the vCenter Server hardware requirements are steep. > >So I'm very seriously considering transitioning from VI3 to CentOS 6 KVM; for my situation it might be doable, but I have a lot to learn about KVM before I can think about it. Well, and CentOS 6 has to be out, too. I use many of the more advanced VI3 features, including vMotion, that means I really have to be careful. I'd want to cluster the hosts and have shared storage on my three onsite EMC Clariions. I'd like to 'RAID' the shared storage between two Clariions, actually, which ESX won't do, AFAIK. So a learning curve is up ahead Q1 or Q2 2011..... >_______________________________________________ >CentOS mailing list >CentOS(a)centos.org >http://lists.centos.org/mailman/listinfo/centos

3 2

Disk array format for CentOS virtual host
by Chuck Munro 18 Dec '10

18 Dec '10

Hello List Members (and Holiday greetings!) This rambles a bit ... my apologies in advance. I am in the process of building a large CentOS-based VM host machine which will replace several individual boxes. I've done the usual hardware research and ended up with a SuperMicro motherboard, dual Xeons, lots of ECC RAM, solid power supply, and tons of cooling. When it comes to the best disk array layout for 7 guest instances of CentOS (mostly 64-bit) I run into the classical argument of disk I/O performance versus array robustness. I'm using Linux software RAID so I don't get locked into a vendor's controller, and because I've got CPU cycles to burn. The intent is to use CentOS-6 with KVM after climbing the usual experimental learning curve. I've got years of CentOS experience, but none with KVM. So, underneath all of this I could use RAID-10/RAID-6/RAID-60. Which one is better for the following work mix: - 4 web servers, not heavily loaded (yet), mostly CGI. - 2 independent Zimbra email servers, which seem to spend most of their time rejecting spam and malware. - A primarily-inbound FTP server with bandwidth throttling. - A batch ImageMagick video process which kicks in a couple of times/day for a few minutes. - A secondary/backup SMB server, not heavily used. - A very lightly loaded DDNS server. Two spindles will be used in RAID-1 for the host OS filesystems. I have 10 large drives for the guest machines, but because they're 2 TByte I want to ensure reasonable fault tolerance, meaning the ability to handle at least two drive failures. This really means that an array rebuild to replace *one* drive stands a good chance of succeeding. At first glance this would seem to be a system which will be doing more reads than writes, so RAID-6 or 60 might be a reasonable fit. RAID-10 offers much better write performance according to what I've been reading, but is less fault tolerant. RAID-60 is a bit of an unknown to me with regard to performance. In case you're wondering, I don't consider RAID to be a backup, so all of this will be automatically backed up to duplicate separate machines, each having tons of RAID-6 storage. Each individual guest OS will do its own rsync thing. Please forgive my lack of VM experience, but an additional question ... I'm thinking of creating a separate RAID-xx MD partition for each guest. Should I hand each over as a 'device' to KVM or is it better to place the guest filesystems in a big file on each separate MD partition? Or, is it better to create one huge RAID-xx partition and just use big filesystems-in-a-file. Either way would probably take the same amount of time (long!) to rebuild an array, if I understand this correctly. The collective wisdom of this list is most welcome. Thanks muchly, Chuck

1 0

server version on laptop
by Johan Scheepers 18 Dec '10

18 Dec '10

Good day, What can I expect if I should install a server version of a distro on my laptop, please. Thanks Johan

6 7

cobbler fails to recognize semanage rules
by bluethundr 18 Dec '10

18 Dec '10

I am having a bit of trouble setting up cobbler on this machine. cobbler check points out a few things to correct: [root@VIRTCENT04:~]#cobbler check The following are potential configuration items that you may want to fix: 1 : you need to set some SELinux content rules to ensure cobbler serves content correctly in your SELinux environment, run the following: /usr/sbin/semanage fcontext -a -t public_content_t "/tftpboot/.*" && /usr/sbin/semanage fcontext -a -t public_content_t "/var/www/cobbler/images/.*" 2 : you need to set some SELinux rules if you want to use cobbler-web (an optional package), run the following: /usr/sbin/semanage fcontext -a -t httpd_sys_content_rw_t "/var/lib/cobbler/webui_sessions/.*" 3 : some network boot-loaders are missing from /var/lib/cobbler/loaders, you may run 'cobbler get-loaders' to download them, or, if you only want to handle x86/x86_64 netbooting, you may ensure that you have installed a *recent* version of the syslinux package installed and can ignore this message entirely. Files in this directory, should you want to support all architectures, should include pxelinux.0, menu.c32, elilo.efi, and yaboot. The 'cobbler get-loaders' command is the easiest way to resolve these requirements. 4 : since iptables may be running, ensure 69, 80, and 25151 are unblocked 5 : debmirror package is not installed, it will be required to manage debian deployments and repositories 6 : The default password used by the sample templates for newly installed machines (default_password_crypted in /etc/cobbler/settings) is still set to 'cobbler' and should be changed, try: "openssl passwd -1 -salt 'random-phrase-here' 'your-password-here'" to generate new one Restart cobblerd and then run 'cobbler sync' to apply changes. I try to apply the first suggestion: [root@VIRTCENT04:~]#/usr/sbin/semanage fcontext -a -t public_content_t "/tftpboot/.*" && /usr/sbin/semanage fcontext -a -t public_content_t "/var/www/cobbler/images/.*" /usr/sbin/semanage: File context for /tftpboot/.* already defined And the system points out that the rules are already defined by semanage. the cobbler service restarts: [root@VIRTCENT04:~]#service cobblerd restart Stopping cobbler daemon: [ OK ] Starting cobbler daemon: [ OK ] [root@VIRTCENT04:~]#SERVING! sync is fine [root@VIRTCENT04:~]#cobbler sync task started: 2010-12-18_105137_sync task started (id=Sync, time=Sat Dec 18 10:51:37 2010) running pre-sync triggers cleaning trees removing: /tftpboot/pxelinux.cfg/default removing: /tftpboot/s390x/profile_list copying bootloaders copying: /usr/lib/syslinux/pxelinux.0 -> /tftpboot/pxelinux.0 copying: /usr/lib/syslinux/menu.c32 -> /tftpboot/menu.c32 copying: /boot/memtest86+-1.65 -> /tftpboot/memtest86+-1.65 copying: /usr/lib/syslinux/memdisk -> /tftpboot/memdisk copying distros copying images generating PXE configuration files rendering Rsync files generating PXE menu structure running post-sync triggers *** TASK COMPLETE *** run cobbler check again: [root@VIRTCENT04:~]#cobbler check The following are potential configuration items that you may want to fix: 1 : you need to set some SELinux content rules to ensure cobbler serves content correctly in your SELinux environment, run the following: /usr/sbin/semanage fcontext -a -t public_content_t "/tftpboot/.*" && /usr/sbin/semanage fcontext -a -t public_content_t "/var/www/cobbler/images/.*" 2 : you need to set some SELinux rules if you want to use cobbler-web (an optional package), run the following: /usr/sbin/semanage fcontext -a -t httpd_sys_content_rw_t "/var/lib/cobbler/webui_sessions/.*" 3 : some network boot-loaders are missing from /var/lib/cobbler/loaders, you may run 'cobbler get-loaders' to download them, or, if you only want to handle x86/x86_64 netbooting, you may ensure that you have installed a *recent* version of the syslinux package installed and can ignore this message entirely. Files in this directory, should you want to support all architectures, should include pxelinux.0, menu.c32, elilo.efi, and yaboot. The 'cobbler get-loaders' command is the easiest way to resolve these requirements. 4 : since iptables may be running, ensure 69, 80, and 25151 are unblocked 5 : debmirror package is not installed, it will be required to manage debian deployments and repositories 6 : The default password used by the sample templates for newly installed machines (default_password_crypted in /etc/cobbler/settings) is still set to 'cobbler' and should be changed, try: "openssl passwd -1 -salt 'random-phrase-here' 'your-password-here'" to generate new one Restart cobblerd and then run 'cobbler sync' to apply changes. same thing... what can I do to get beyond this infinite loop? -- GPG me!! gpg --keyserver pgp.mit.edu --recv-keys F186197B

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Discuss December 2010