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34753 discussions

SSH problems
by Per Qvindesland 14 Feb '09

14 Feb '09

Hi list For some odd reason after a reboot that one of my server's initiated on it's own it is now not allowing ssh logins it gives the following errors when I try to loging with ssh -v: Minor code may provide more information Unknown code krb5 195 I have googled a little and I see that other people has also had this problem and the solution seems to be to set the GSSAPIAuthentication to no and that will work, the thing that I am wondering about is if there is any ways of still being capable to login with ssh remotely I mean if there is any switch that I could use to get pass this during login. Regards Per Qvindesland

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usb network at install time
by Jerry Geis 13 Feb '09

13 Feb '09

Hi all, Is there a way to specify a usb network device at boot time for installation? I have trendnet TU2-ET100 usb network device. I have a motherboard that in the 5.2 install disk the network is not detected. However I want to use all my network kickstart files so I am looking for a way to have a USB network at install time. Is that possible? Jerry

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Re: [CentOS] text processing problem with bash/perl
by David G. Miller 13 Feb '09

13 Feb '09

Dennis Kaptain <dkaptain(a)yahoo.com.mx> wrote: >> > >> > Hi, >> > >> > Anyone has some ways for the following text processing problem? I have a text >> > file containing two stanzas attached below. I want to uncomment the stanza with >> > 'host=localhost' line, while left the other stanza unchanged. >> > >> > ... >> > >> > /* udp_send_channel { >> > host=localhost >> > port = 10017 >> > ttl = 1 >> > } */ >> > >> > /* udp_send_channel { >> > host=ganglia100.ec2.example.com >> > port = 10017 >> > ttl = 1 >> > } */ >> > >> > ... >> > >> > If I use command below then both stanza will be altered... Please help. >> > >> > sed -i -e '/^\/\* udp_send_channel/, /} \*\// {s/^\/\* >> > udp_send_channel/udp_send_channel/g; s/\} \*\//}/g; }' >> > >> > --David >> > >> > > this is probably WAY more than you wanted <SNIP> A tad simpler: #! /usr/bin/perl -w use strict; my $file; open FILE, "stuff.txt" or die; # Undefine the input record separator. undef $/; # Slurp the whole file in $file = <FILE>; close FILE; # Pattern match on the stanza we want to uncomment and uncomment it. You may need to play with # the white space in the output to get the formatting you want. $file =~ s?/*\s*udp_send_channel {\n\s*host=localhost\n\s*port = 10017\n\s*ttl = 1\n\s*} */\n?udp_send_channel {\n host=localhost\n port = 10017\n ttl = 1\n}?; # Write the result. print $file; #~~~~~~~~~~~~~~~~~End of Script~~~~~~~~~~~~~~ Cheers, Dave -- Politics, n. Strife of interests masquerading as a contest of principles. -- Ambrose Bierce

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GFS + Restarting iptables
by MARS websolutions 13 Feb '09

13 Feb '09

Dear List, I have one last little problem with setting up an cluster. My gfs Mount will hang as soon as I do an iptables restart on one of the nodes.. First, let me describe my setup: - 4 nodes, all running an updated Centos 5.2 installation - 1 Dell MD3000i ISCSI SAN - All nodes are connected by Dell?s Supplied RDAC driver Everything is running stable when the cluster is started (tested for a week or so), when I did some last changes in my firewall and did an iptables restart it all went down after a while. I reproduced the issue now several times so I am quite sure it has to do with the iptables restart. I have a custom fence script for our ipoman powerswitch, which is all tested and is working fine. When I do iptables restart the following will happen: - After approx 10 seconds the process gfs_controld will go to 100% cpu usage (at all nodes!) - I can still access my gfs Mount - The Group_tool dump gfs tells me: ---------------------- 1234541723 config_no_withdraw 0 1234541723 config_no_plock 0 1234541723 config_plock_rate_limit 100 1234541723 config_plock_ownership 0 1234541723 config_drop_resources_time 10000 1234541723 config_drop_resources_count 10 1234541723 config_drop_resources_age 10000 1234541723 protocol 1.0.0 1234541723 listen 1 1234541723 cpg 5 1234541723 groupd 6 1234541723 uevent 7 1234541723 plocks 10 1234541723 plock cpg message size: 336 bytes 1234541723 setup done 1234541737 client 6: join /setan gfs lock_dlm mars:setan rw /dev/mapper/vg_cluster-lv_cluster 1234541737 mount: /setan gfs lock_dlm mars:setan rw /dev/mapper/vg_cluster-lv_cluster 1234541737 setan cluster name matches: mars 1234541737 setan do_mount: rv 0 1234541737 groupd cb: set_id setan 20004 1234541737 groupd cb: start setan type 2 count 4 members 3 2 1 4 1234541737 setan start 3 init 1 type 2 member_count 4 1234541737 setan add member 3 1234541737 setan add member 2 1234541737 setan add member 1 1234541737 setan add member 4 1234541737 setan total members 4 master_nodeid -1 prev -1 1234541737 setan start_participant_init 1234541737 setan send_options len 1296 "rw" 1234541737 setan start_done 3 1234541737 setan receive_options from 3 len 1296 last_cb 2 1234541737 setan receive_journals from 1 to 3 len 320 count 4 cb 2 1234541737 receive nodeid 1 jid 1 opts 1 1234541737 receive nodeid 2 jid 2 opts 1 1234541737 receive nodeid 3 jid 3 opts 1 1234541737 receive nodeid 4 jid 0 opts 1 1234541737 setan received_our_jid 3 1234541737 setan retrieve_plocks 1234541737 notify_mount_client: nodir not found for lockspace setan 1234541737 notify_mount_client: ccs_disconnect 1234541737 notify_mount_client: hostdata=jid=3:id=131076:first=0 1234541737 groupd cb: finish setan 1234541737 setan finish 3 needs_recovery 0 1234541737 setan set /sys/fs/gfs/mars:setan/lock_module/block to 0 1234541737 setan set open /sys/fs/gfs/mars:setan/lock_module/block error -1 2 1234541737 kernel: add@ mars:setan 1234541737 setan ping_kernel_mount 0 1234541738 kernel: change@ mars:setan 1234541738 setan recovery_done jid 3 ignored, first 0,0 1234541738 client 6: mount_result /setan gfs 0 1234541738 setan got_mount_result: ci 6 result 0 another 0 first_mounter 0 opts 1 1234541738 setan send_mount_status kernel_mount_error 0 first_mounter 0 1234541738 client 6 fd 11 dead 1234541738 setan receive_mount_status from 3 len 288 last_cb 3 1234541738 setan _receive_mount_status from 3 kernel_mount_error 0 first_mounter 0 opts 1 1234541925 client 6: dump 1234542420 client 6: dump 1234542420 client 7 fd 11 read error -1 9 1234542424 client 6: dump 1234542424 client 7 fd 11 read error -1 9 1234542424 client 8 fd 11 read error -1 9 1234542425 client 6: dump 1234542425 client 7 fd 11 read error -1 9 1234542425 client 8 fd 11 read error -1 9 1234542425 client 9 fd 11 read error -1 9 1234542426 client 6: dump 1234542426 client 7 fd 11 read error -1 9 1234542426 client 8 fd 11 read error -1 9 1234542426 client 9 fd 11 read error -1 9 1234542426 client 10 fd 11 read error -1 9 1234542427 client 6: dump 1234542427 client 7 fd 11 read error -1 9 1234542427 client 8 fd 11 read error -1 9 1234542427 client 9 fd 11 read error -1 9 1234542427 client 10 fd 11 read error -1 9 1234542427 client 11 fd 11 read error -1 9 1234542428 client 6: dump ---------------------- - After a while the groupd process will hit 100% as well (on all nodes) - The gfs Mount will be inaccessible after a while, it hangs when trying to open it. - Group_tool still shows that all nodes are participating in the cluster and gfs service, but no problems are reported.. Does anyone has a clue to fix this completly or at least how to recover my system when it happens without a full reboot of the complete cluster? I have tried for a lot of hours and im still very new to clustering, im just testing it before I want to use it in production enviroments. I really appreciate any help! Regards, Sven Config files/settings: --------------------------- [root@badjak ~]# uname -a Linux badjak.somedomain.tld 2.6.18-92.1.22.el5 #1 SMP Tue Dec 16 11:57:43 EST 2008 x86_64 x86_64 x86_64 GNU/Linux ---------------------------- /etc/cluster/cluster.conf: ------------------------------------ <?xml version="1.0"?> <cluster alias="mars" config_version="77" name="mars"> <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/> <clusternodes> <clusternode name="gandaria.somedomain.tld" nodeid="1" votes="1"> <fence> <method name="1"> <device name="ipoman" action="Off" switch="volt" port="3"/> <device name="ipoman" action="Off" switch="ampere" port="9"/> <device name="ipoman" action="On" switch="volt" port="3"/> <device name="ipoman" action="On" switch="ampere" port="9"/> </method> </fence> </clusternode> <clusternode name="goreng.somedomain.tld" nodeid="2" votes="1"> <fence> <method name="1"> <device name="ipoman" action="Off" switch="volt" port="4"/> <device name="ipoman" action="Off" switch="ampere" port="10"/> <device name="ipoman" action="On" switch="volt" port="4"/> <device name="ipoman" action="On" switch="ampere" port="10"/> </method> </fence> </clusternode> <clusternode name="brandal.somedomain.tld" nodeid="4" votes="1"> <fence> <method name="1"> <device name="ipoman" action="Off" switch="volt" port="9"/> <device name="ipoman" action="Off" switch="ampere" port="3"/> <device name="ipoman" action="On" switch="volt" port="9"/> <device name="ipoman" action="On" switch="ampere" port="3"/> </method> </fence> </clusternode> <clusternode name="badjak.somedomain.tld" nodeid="3" votes="1"> <fence> <method name="1"> <device name="ipoman" action="Off" switch="volt" port="10"/> <device name="ipoman" action="Off" switch="ampere" port="4"/> <device name="ipoman" action="On" switch="volt" port="10"/> <device name="ipoman" action="On" switch="ampere" port="4"/> </method> </fence> </clusternode> </clusternodes> <cman/> <fencedevices> <fencedevice agent="fence_ipoman" name="ipoman"/> </fencedevices> <rm> <failoverdomains/> <resources/> </rm> </cluster> ------------------------------------ [root@badjak /]# cat /etc/fstab /dev/VolGroup00/LogVol00 / ext3 defaults 1 1 LABEL=/boot /boot ext3 defaults 1 2 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 /dev/VolGroup00/LogVol01 swap swap defaults 0 0 /dev/vg_cluster/lv_cluster /setan gfs defaults 0 0 ------------------------------------ [root@badjak ~]# group_tool type level name id state fence 0 default 00010001 none [1 2 3 4] dlm 1 clvmd 00010004 none [1 2 3 4] dlm 1 setan 00030004 none [1 2 3 4] dlm 1 rgmanager 00040004 none [1 2 3 4] gfs 2 setan 00020004 none [1 2 3 4] ------------------------------------ [root@badjak ~]# clustat Cluster Status for mars @ Fri Feb 13 17:18:58 2009 Member Status: Quorate Member Name ID Status ------ ---- ---- ------ gandaria.somedomain.tld 1 Online goreng.somedomain.tld 2 Online badjak.somedomain.tld 3 Online, Local brandal.somedomain.tld 4 Online ------------------------------------ [root@badjak ~]# SMdevices PowerVault Modular Disk Storage Manager Devices, Version 09.17.A6.01 Built Tue Mar 20 15:31:11 CST 2007 Copyright 2005-2006 Dell Inc. All rights reserved. Use is subject to license terms /dev/sdb (/dev/sg3) [Storage Array setan, Virtual Disk 1, LUN 0, Virtual Disk ID <6001ec9000f2dc860000043448bf7e20>, Preferred Path (Controller-1): In Use] ------------------------------------ [root@badjak ~]# /etc/init.d/clvmd status clvmd (pid 7433) is running... active volumes: LogVol00 LogVol01 lv_cluster ------------------------------------

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OT: Suggestions for connecting a postfix to an sms box
by Erick Perez 13 Feb '09

13 Feb '09

Hi there, I would like to hear some hardware recomendations to connect our smtp server (postfix) to an external SMS box. Basically I am looking for a SMS box that takes messages via smtp and sends them via the SMS part. Has anyone here implemented a solution like this? I must use an in house sms box (GSM), I cannot use a service provider (such as internet smtp to sms providers). thanks, -- ------------------------------------------------------------ Erick Perez Cel +(507) 6675-5083 ------------------------------------------------------------

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CentOS-announce Digest, Vol 48, Issue 7
by centos-announce-request＠centos.org 13 Feb '09

13 Feb '09

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. CESA-2009:0012 Moderate CentOS 4 s390(x) netpbm - security update (Pasi Pirhonen) 2. CESA-2009:0261 Moderate CentOS 4 s390(x) vnc - security update (Pasi Pirhonen) ---------------------------------------------------------------------- Message: 1 Date: Thu, 12 Feb 2009 19:53:57 +0200 From: Pasi Pirhonen <upi(a)centos.fi> Subject: [CentOS-announce] CESA-2009:0012 Moderate CentOS 4 s390(x) netpbm - security update To: centos-announce(a)centos.org Message-ID: <20090212175357.GN12358(a)centos.fi> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory 2009:0012 https://rhn.redhat.com/errata/RHSA-2009-0012.html The following updated files have been uploaded and are currently syncing to the mirrors: s390: updates/s390/RPMS/netpbm-10.25-2.1.c4.4.s390.rpm updates/s390/RPMS/netpbm-devel-10.25-2.1.c4.4.s390.rpm updates/s390/RPMS/netpbm-progs-10.25-2.1.c4.4.s390.rpm s390x: updates/s390x/RPMS/netpbm-10.25-2.1.c4.4.s390x.rpm updates/s390x/RPMS/netpbm-devel-10.25-2.1.c4.4.s390x.rpm updates/s390x/RPMS/netpbm-progs-10.25-2.1.c4.4.s390x.rpm -- Pasi Pirhonen - upi(a)iki.fi - http://pasi.pirhonen.eu/ Top-postings silently ignored

1 0

Monthly Newsletter
by Didi 13 Feb '09

13 Feb '09

Hey A friend asked me how he could stay up to date with CentOS and if there was a newsletter or something. After some research I found that there was a discussion on the promo list about half a year ago but nothing happened. If you look at : http://wiki.centos.org/SpecialInterestGroup/Promo/TODO you can see, that is has to be done :) Would something like this, be appreciated by the community? What would people want to see in a newsletter? Are people interested in doing this? Personally I was thinking of : - General information (Like "whats up with 5.3") - What is happening on the mailing lists / Forum - Developer interview (Developers would you do that?) - Tips/Tricks - Event reports and up coming events - Word of the Month. Something to lighten up the newsletter. - Bug fixes - Ideas welcome I would be quite happy to contribute to this and it would give people who want to give something back a nice chance to get public exposure. Is monthly a good compromise between workload and actuality? Cheers Didi -- My NEW project : http://www.hacktags.org My www page: www.ribalba.de Email / Jabber: ribalba(a)gmail.com Skype : ribalba

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Nagios: Error: Service check command ... not defined anywhere!
by Alexander Farber 13 Feb '09

13 Feb '09

Hello CentOS users, I have problems posting the question below to the Nagios mailing list (my subscription is not accepted for some reason). Has anybody of you already had this probably frequent problem with Nagios in CentOS? I can't use check_squid from command-plugins.cfg (s. below) Thank you for any hints Alex ---------- Forwarded message ---------- To: nagios-users(a)lists.sourceforge.net Dear Nagios users, I'm using: # cat /etc/*release CentOS release 5.2 (Final) <-- compatible to RHEL 5.2 # rpm -qa|grep nagios nagios-3.0.6-1.el5.rf nagios-plugins-1.4.13-1.el5.rf and have successfully added monitoring of 20 other Linux-servers by replicating the entries from /etc/nagios/objects/localhost.cfg But now I'm trying to add 2 more things: 1) monitoring Squid 2) monitoring Apache at ports 8080 and 8090 I have found the following 3 lines: command[check_http]=/usr/lib/nagios/plugins/check_http -H $HOSTADDRESS$ -I $HOSTADDRESS$ command[check_http2]=/usr/lib/nagios/plugins/check_http -H $ARG1$ -I $HOSTADDRESS$ -w $ARG2$ -c $ARG3$ ....... command[check_squid]=/usr/lib/nagios/plugins/check_http -H $HOSTADDRESS$ -p $ARG1$ -u $ARG2$ -e 'HTTP/1.0 200 OK' in the file /etc/nagios/command-plugins.cfg and have added 1 more line: command[check_http3]=/usr/lib/nagios/plugins/check_http -p $ARG1$ -I $HOSTADDRESS$ (after reading "check_http --help"). In my config files I've added: define host{ use linux-server host_name ablpdm01 alias ablpdm01 address 10.121.42.100 } define service{ use local-service host_name ablpdm01 service_description HTTP check_command check_http3!8090 notifications_enabled 0 } .......... define host{ use linux-server host_name ablprx01 alias ablprx01 address 10.121.42.32 } define service{ use local-service host_name ablprx01 service_description Proxy check_command check_squid!8080 } Unfortunately I get errors now: # nagios -v ../nagios.cfg Nagios 3.0.6 Copyright (c) 1999-2008 Ethan Galstad (http://www.nagios.org) Last Modified: 12-01-2008 License: GPL Reading configuration data... Running pre-flight check on configuration data... Checking services... Error: Service check command 'check_http3' specified in service 'HTTP' for host 'ablpdm01' not defined anywhere! Error: Service check command 'check_http3' specified in service 'HTTP' for host 'ablpdm02' not defined anywhere! Error: Service check command 'check_http3' specified in service 'HTTP' for host 'ablpdm03' not defined anywhere! Error: Service check command 'check_squid' specified in service 'Proxy' for host 'ablprx01' not defined anywhere! Checked 123 services. Checking hosts... Checked 16 hosts. Checking host groups... Checked 5 host groups. Checking service groups... Checked 0 service groups. Checking contacts... Checked 1 contacts. Checking contact groups... Checked 1 contact groups. Checking service escalations... Checked 0 service escalations. Checking service dependencies... Checked 0 service dependencies. Checking host escalations... Checked 0 host escalations. Checking host dependencies... Checked 0 host dependencies. Checking commands... Checked 24 commands. Checking time periods... Checked 5 time periods. Checking for circular paths between hosts... Checking for circular host and service dependencies... Checking global event handlers... Checking obsessive compulsive processor commands... Checking misc settings... Total Warnings: 0 Total Errors: 4 ***> One or more problems was encountered while running the pre-flight check... Check your configuration file(s) to ensure that they contain valid directives and data defintions. If you are upgrading from a previous version of Nagios, you should be aware that some variables/definitions may have been removed or modified in this version. Make sure to read the HTML documentation regarding the config files, as well as the 'Whats New' section to find out what has changed. Does anybody have an idea what's wrong? Isn't adding command[check_XXX]=YYY to command-plugins.cfg enough? I'm especially perplexed by check_squid being not found even though it's there from the start Thank you Alex

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procmail 3.22 on CentOS 5.2
by Robert Grasso 13 Feb '09

13 Feb '09

Hello, I am implementing procmail with postfix on a new SMTP server, I have too many .procmailrc from my former sendmail installation and not enough time to learn maildrop and migrate right now. It seems that LOGABSTRACT does not work : I don't get the datas LOGABSTRACT should prompt in the log, whether I don't set LOGABSTRACT (default behaviour) or if I set it to "on", "yes" : anyone have hints about that ? Regards --- Robert GRASSO System engineer CEDRAT S.A. 15 Chemin de Malacher - Inovallée - 38246 MEYLAN cedex - FRANCE Phone: +33 (0)4 76 90 50 45 - Fax: +33 (0)4 56 38 08 30 mailto:robert.grasso@cedrat.com - http://www.cedrat.com

2 3

clustering and load balancing Apache
by Anto Marky 13 Feb '09

13 Feb '09

Hi, I am new to clustering and loadbalancing in apache, What is best way of doing it? How do I do the clustering and what tools do I need to use? Do I have those tools, I use CentOS , Do i have any tools in CenOs which comes default in it? And how do I do apache load balancing? should I rely on apache forums or mailing list or is there any way or tool I can use in CentOS? Can any throw some vague Idea on how to do it so that I start reading documents before I do it? Thanks and regards Marky

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