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LVM2 Thin Provisioning: 6.3 vs 6.4 (lvm2, device-mapper-persistent-data, et al)
by Charles Butterfield 05 Dec '12

05 Dec '12

I've been running into some problems with LVM thin provisioning in CentOS 6.3. Some of these I have reported to RH Bugzilla (e.g. https://bugzilla.redhat.com/show_bug.cgi?id=883629) The upshot seems to be that in RHEL 6.3 the features are "preview" but in 6.4 they are "full featured/robust" (hopefully) and many of the bugs are fixed. This raises the following questions: 1) When will either CentOS 6.4 be available, OR selected features (e.g. thin provisioning fixes) of RHEL 6.4 be available in CentOS 6.3? 2) Is there some way that I can help with the above? 3) Lastly, should I also file duplicate CentOS Bug Tracker (http://bugs.centos.org/view_all_bug_page.php) tickets on these items? Regards -- Charlie ----------------------------------- Charles Butterfield, Chief Engineer Next Century Corporation Phone: 443-545-3100 Direct: 443-545-3113 Fax: 443-285-0799 Email: Charles.Butterfield(a)nextcentury.com <mailto:Charles.Butterfield@nextcentury.com> Web: www.nextcentury.com <http://www.nextcentury.com/>

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first boot hung
by Robert Moskowitz 05 Dec '12

05 Dec '12

I just rebooted after the install. The bar at the progress bar at the bottom of the screen is stuck. There is a white, blue, and orange bar and Centos 6.3 is in orange. I did press <alt-d> to watch the startup, and everything seemed to have been progressing OK. Then the bar came back and nothing. I tried <alt-d> again and nothing. So I switched terminals, <alt-F3> and got a login, and am now logged in as root. Nothing is being reported being added to /var/log/messages. Terminals F2-F6 are present; F7 is a blank screeen. hmmmm. I see something intersting in /var/log/Xorg.5.log it says something like: (EE) Failed to load module "fbdev" (module does not exist, 0) (II) VESA: driver for VESA chipsets: vesa (--) using VT number 7 (EE) The PCI device has a kernel module claiming it, (EE) this driver cannot operate until it has been unloaded. (EE) Try appending "nomodest" to your boot options (WW) Falling back to old probe method for vesa (EE) No devices detected. Fatal server error: no screens found ... Now what?

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Adding Update repository at install time
by Robert Moskowitz 05 Dec '12

05 Dec '12

This is easy with Fedora, as the various 'common' repos are listed and all I have to do is change the URL.... Anyway, I am doing a netinstall of Centos 6.3 i386 from my local repo. I also have the updates repo. How can I add the updates repo so that I get it up to snuff right away (like I have been doing with Fedora for quite some time)? thanks.

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CentOS-announce Digest, Vol 94, Issue 2
by centos-announce-request＠centos.org 05 Dec '12

05 Dec '12

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CEBA-2012:1515 CentOS 6 resource-agents Update (Johnny Hughes) 2. CEBA-2012:1519 CentOS 6 qemu-kvm Update (Johnny Hughes) 3. CEBA-2012:1518 CentOS 6 NetworkManager Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 4 Dec 2012 14:06:23 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:1515 CentOS 6 resource-agents Update To: centos-announce(a)centos.org Message-ID: <20121204140623.GA21392(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:1515 Upstream details at : https://rhn.redhat.com/errata/RHBA-2012-1515.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 9accc4cad486b841d84bd1ea8eeb8b4be8f113ae376d4193e95b2e0f43e6429b resource-agents-3.9.2-12.el6_3.2.i686.rpm x86_64: 8330cfd5d1ff01c6c98efbfc7d4f4476655acee0c08603fa840b9723e60d8872 resource-agents-3.9.2-12.el6_3.2.x86_64.rpm Source: 8bd42e43426c64bc033a4815fd74b3983ba79f8e464388bb6430a04f458b4b2f resource-agents-3.9.2-12.el6_3.2.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Tue, 4 Dec 2012 18:33:26 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:1519 CentOS 6 qemu-kvm Update To: centos-announce(a)centos.org Message-ID: <20121204183326.GA2620(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:1519 Upstream details at : https://rhn.redhat.com/errata/RHBA-2012-1519.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) x86_64: 9340f18a2d3d89a81630394fe5439c16fda97b32bcda42f4301cfb1e245fa9d4 qemu-guest-agent-0.12.1.2-2.295.el6_3.8.x86_64.rpm 7d5a279eb982e8f78ff975fa4d4e5042def5dc21670ad89100b3147837b1b545 qemu-img-0.12.1.2-2.295.el6_3.8.x86_64.rpm 0605fc713d93563fd35097f96383863b5cbe8681b8777914f170e9772bf1d72e qemu-kvm-0.12.1.2-2.295.el6_3.8.x86_64.rpm 0f62554ddda69c4db762dc7dac1ec5e119712ee7183c58d2974f57936204e0f7 qemu-kvm-tools-0.12.1.2-2.295.el6_3.8.x86_64.rpm Source: b5bc24aee586f6d93c6a880921443e68974ee351b2c9ac3b4b77e992cf836e68 qemu-kvm-0.12.1.2-2.295.el6_3.8.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Tue, 4 Dec 2012 18:33:49 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:1518 CentOS 6 NetworkManager Update To: centos-announce(a)centos.org Message-ID: <20121204183349.GA2741(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:1518 Upstream details at : https://rhn.redhat.com/errata/RHBA-2012-1518.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: c5ea03adf11aee28091c449f13dc763e66611dd5c0720b07708a4459b4d6a69d NetworkManager-0.8.1-34.el6_3.i686.rpm 69d58dc8d0a6b0b9df01fc16735acb0507c732ce9d49b083c0f2f8a1f7b2ae0d NetworkManager-devel-0.8.1-34.el6_3.i686.rpm 804ebdbb4e35210f28fcfbf46d1e6085d4fa3e5d0691cf32feb55e60fc68a178 NetworkManager-glib-0.8.1-34.el6_3.i686.rpm c093d8a52476cc34a9d924260afdd79a1587552ab628cab9646c3a58c58c3a69 NetworkManager-glib-devel-0.8.1-34.el6_3.i686.rpm 911cc83b21ba9e3ed9e4190c0dc3ca6de985d3f294beec0aa7d71d9dfa79e5b9 NetworkManager-gnome-0.8.1-34.el6_3.i686.rpm x86_64: 366f59672e728034a53a9136d92c69a1fc8559603c4950940a31fe8f651dc222 NetworkManager-0.8.1-34.el6_3.x86_64.rpm 69d58dc8d0a6b0b9df01fc16735acb0507c732ce9d49b083c0f2f8a1f7b2ae0d NetworkManager-devel-0.8.1-34.el6_3.i686.rpm 0c4f97b2c8b945311a17570843c83d1c117facb49a3af8c5fc8c9ab5e0af14c7 NetworkManager-devel-0.8.1-34.el6_3.x86_64.rpm 804ebdbb4e35210f28fcfbf46d1e6085d4fa3e5d0691cf32feb55e60fc68a178 NetworkManager-glib-0.8.1-34.el6_3.i686.rpm cf664cb3345ec31a6dae5123e553009936da0a2843ec3c019bc146b4fa1e057f NetworkManager-glib-0.8.1-34.el6_3.x86_64.rpm c093d8a52476cc34a9d924260afdd79a1587552ab628cab9646c3a58c58c3a69 NetworkManager-glib-devel-0.8.1-34.el6_3.i686.rpm 63f7b637a80c24212389fc6a6126dd6623b539028b957afed444e58ee49c0600 NetworkManager-glib-devel-0.8.1-34.el6_3.x86_64.rpm 78b886e2e21fbefd47551b2c6d62e017674d33791431250170a79a7cf4cc78a7 NetworkManager-gnome-0.8.1-34.el6_3.x86_64.rpm Source: 2c21bd390e492800139589cb36746ae17dde8c49333eb35c2384568816a52960 NetworkManager-0.8.1-34.el6_3.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 94, Issue 2 **********************************************

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Re: [CentOS] How to configure sendmail
by Nikos Gatsis - Qbit 05 Dec '12

05 Dec '12

On 3/12/2012 2:00 μμ, centos-request(a)centos.org wrote: > > In reading my Linux Admin books and looking at the help files I > am confused about what entries to enter into sendmail.mc. To > date I have not had to configure sendmail since I use a class in > PHP that is straight, however I am learning how to use Concrete5 > for my local Rotary club and it apparently needs sendmail. > > My smtp provider is smtp.sonic.net and it requires user name and > password. Is there a simple example that could guide me on > setting the parameters in sendmail.mc? I believe doing the > "make" after is straight forward. > > Todd > http://cri.ch/linux/docs/sk0009.html Very easy tutorial. NIkos -- Untitled Document ------------------------------------------------------------------------ *Γατσής Νίκος - Gatsis Nikos* Web developer tel.: 2108256721 - 2108256722 fax: 2108256712 email: ngatsis(a)qbit.gr http://www.qbit.gr

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Setting up NTP server
by Rajagopal Swaminathan 04 Dec '12

04 Dec '12

Greetings, Please treat this post with kid gloves as I am bit rusty of the late on centos and last NTP server that I worked on was during centos 5.1 days. I am going to have to install centos 6.3 in coming week in all windows environment. This box will be the tunning glpi and ocs-inventory. I am planning to have two NICs: one facing the raw internet and other on a Private LAN. I want this box (as NTP Client) to get time through NTP from raw internet using ADSL. I want this box to be the primary NTP server for the private LAN. none of the packet should traverse pass from LAN to Internet or vice versa. IOW, no routing should be there. If it work perhaps at a future date, may be an instance of squid proxy. I dont mind all the ports being open for the Private LAN or is that a bad idea? I am not sure if there is a DNS in this whole scenario And yes all the windows boxens (few w2k3, XP) in the LAN would have to synchronise time with this centos bo Is it possible? If so, how would typical config files for eth0, eth2, firewall(s) look like? -- Regards, Rajagopal

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Long time away for Centos installs, need some info
by Robert Moskowitz 04 Dec '12

04 Dec '12

I have not touched my Centos systems for over a year; it is time to get current to do some new, interesting things. So of course, 6.3, but which install? I run a local repo that I rsync from a mirror near me. So I believe I can use the Netinstall iso, but which one? How do I determine if I have a i386 or x86_64 processor? If x86_64 how do I determine if I use EFI or not?

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iptables 1.4 and kernel 2.6 CONFIG_IP_NF_MATCH_STATE
by Miguel González Castaños 04 Dec '12

04 Dec '12

Hi, I have a VPS running Centos 6.2 and trying to run this iptables rule: [root@myserver ~]# iptables -A INPUT -i venet0 -m state --state ESTABLISHED -j ACCEPT iptables: No chain/target/match by that name. Narrowing down the issue it seems there is no IP_CONNTRACK support but now it's called NF_CONNTRACK. However following this link: http://www.spinics.net/lists/netfilter/msg33535.html I have found that I don't have CONFIG_IP_NF_MATCH_STATE support. Unfortunately this virtuozzo VPS is not using modules: [root@vrtl13369 ~]# lsmod Module Size Used by How can I enable that CONFIG_IP_NF_MATCH_STATE support in my kernel? I prefer to stick to the kernels provided by the repos and not recompile my own kernel. Regards, Miguel

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iSCSI Question
by Steven Crothers 04 Dec '12

04 Dec '12

Hey everyone, Is anybody aware of a /true/ active/active multi-head and multi-target clustered iSCSI daemon? IE: Server 1: Hostname: host1.test.com IP Address: 10.0.0.1 Server 2: Hostname: host2.test.com IP Address: 10.0.0.2 Then they would utilize a CLVM disk between them, let's call that VG "disk" and then directly map each LUN (1,2,3,4,etc) to LV's named 1,2,3,4,... and so on. That would essentially make both host1 and host2 identical iSCSI targets. So I could hook up 30 servers to each LUN on each host1 and host2 (assuming those block devices had a cluster aware filesystem on them). However, what I wan't to accomplish is true active/active MPIO utilizing the dm driver to combine LUN 1 from both host1 and host2 as a single /dev/dm-0 device in active/active mode. This would allow me to multipath across multiple fabrics, develop true high availability and increase my throughput significantly. Any idea of an iscsi tgtd that supports this? As far as I can tell, none do (that I can find). I know some proprietary vendors have this type of functionality, which may or may not be using iSCSI code (but that's a whole set of arguments for later..). Ultimately, my goal is this. I want to take my existing Ceph cluster, expose a handful of RBDs from it to two iSCSI heads running C6 or RHEL6 or what have you, so I can use my inexpensive storage built on Linux -- for my Windows 2008 machines. Thoughts? Steven Crothers steven.crothers(a)gmail.com

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How to configure sendmail
by Todd Cary 04 Dec '12

04 Dec '12

In reading my Linux Admin books and looking at the help files I am confused about what entries to enter into sendmail.mc. To date I have not had to configure sendmail since I use a class in PHP that is straight, however I am learning how to use Concrete5 for my local Rotary club and it apparently needs sendmail. My smtp provider is smtp.sonic.net and it requires user name and password. Is there a simple example that could guide me on setting the parameters in sendmail.mc? I believe doing the "make" after is straight forward. Todd -- Ariste Software Bend, OR 97702 http://www.aristesoftware.com

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