Discuss February 2008

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286 participants
340 discussions

Command line tool to test bandwidth between 2 servers
by Dan Carl 07 Feb '08

07 Feb '08

What's the best way to do this? Daily, jpg images are added to an inhouse server. Everynight I want to backup these images to a server offsite, via rsync. What I want is to determine what to set the bwlimit to. I also want to estimate how many MB's of images I can move nightly. Thanks Dan

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PCNS for CentOS and APC ups's
by Joseph L. Casale 07 Feb '08

07 Feb '08

Apparently there is only an Itanium client for RHEL according to APC? I need to setup a few boxes to shut down safely and don't know if the PCNS 2.2.3 Linux version will do it? Anyone know why it needs Java as well? (Blegh) Assuming APC is fairly popular, how do you guys shutdown your CentOS boxes with a UPS with a management card in it? Thanks! jlc

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Re: Trouble Ticket System
by Jun Salen 07 Feb '08

07 Feb '08

>I found this on Exo; >http://www.vulnerabilityscanning.com/Exo-PHPDesk-id-Parameter-SQL-Injection… >I don't see a version or a date to check up on it. Thanks for the info Scott. I will take those into consideration. junji aisalen.wordpress.com Linux Registered User #253162 CentOS User Send instant messages to your online friends http://uk.messenger.yahoo.com

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Re: [CentOS] PCNS for CentOS and APC ups's
by Ross S. W. Walker 07 Feb '08

07 Feb '08

Well I'm not near the config, but I remember it was easy. The default timings match APC's defaults, so all you really need to do is set the UPS name (for identification purposes) and the comm type will be snmp, port will be something like <hostname>:161:<community> and set an email address to send alerts to. Testing is a little tricky as it dials directly in to the snmp interface, you could lower the "time on battery" and kick the plug on the ups and see if it initiates a safe shutdown, but that depends on how many other hosts are on the ups and if this host is in active production. It has worked in my environment though. -Ross ----- Original Message ----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: centos(a)centos.org <centos(a)centos.org> Sent: Wed Feb 06 18:50:23 2008 Subject: RE: [CentOS] PCNS for CentOS and APC ups's >I use apcupsd from epel > >-Ross Reading about that now, it sounds a lot cleaner then that silly java based one from APC. Can you elaborate on how you add it as a device into the UPS and share a config in this scenario? Thanks! jlc ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

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adapting perl check_snmp_load script for CentOS environment
by Rogelio 07 Feb '08

07 Feb '08

I'm trying to use some perl scripts on a CentOS box (Nagios03) that were previously working on a Gentoo (Nagios01) box. Any ideas on what I might to do try to resolve this? WORKS ON GENTOO nagios01 new # ./check_snmp_load.pl -H myserver.mydomain.com<http://ha-vpn-internal.clacorp.com> -C myPublicString -w 50,50,50 -c 75,75,75 -T nsc -t 15 -f CPU : 3 3 3 : OK | cpu_5_sec=3%;50;75,cpu_1_min=3%;50;75,cpu_5_min=3%;50;75 nagios01 new # DOES NOT WORK ON CENTOS [root@nagios03 plugins]# ./check_snmp_load.pl -H myserver.mydomain.com<http://ha-vpn-internal.clacorp.com/> -C myPublicString -w 50,50,50 -c 75,75,75 -T nsc -t 15 -f Unknown option: T Multiple warning without -L or -I switch Usage: ./check_snmp_load.pl [-v] -H <host> -C <snmp_community> | (-l login -x passwd) [-p <port>] -w <warn level> -c <crit level> [-L|-A|-I|N] [-f] [-t <timeout>] [-V] [root@nagios03 plugins]#

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Re: [CentOS] PCNS for CentOS and APC ups's
by Ross S. W. Walker 06 Feb '08

06 Feb '08

I use apcupsd from epel -Ross ----- Original Message ----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: 'centos(a)centos.org' <centos(a)centos.org> Sent: Wed Feb 06 18:11:12 2008 Subject: [CentOS] PCNS for CentOS and APC ups's Apparently there is only an Itanium client for RHEL according to APC? I need to setup a few boxes to shut down safely and don’t know if the PCNS 2.2.3 Linux version will do it? Anyone know why it needs Java as well? (Blegh) Assuming APC is fairly popular, how do you guys shutdown your CentOS boxes with a UPS with a management card in it? Thanks! jlc ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

2 1

yum upgrade php dependency failure
by Ed Morrison 06 Feb '08

06 Feb '08

Hi, I am trying to upgrade php to version 5. When running yum upgrade I get this failure: --> Running transaction check --> Processing Dependency: php = 4.3.9-3.22.9 for package: php-pear --> Finished Dependency Resolution Error: Missing Dependency: php = 4.3.9-3.22.9 is needed by package php-pear but the required php version is installed: [root@ftp ~]# rpm -q php php-4.3.9-3.22.9 Any suggestions on what is wrong and how to fix this? Thanks! Ed

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Installation problems with large mirrored drives
by Bowie Bailey 06 Feb '08

06 Feb '08

I am trying to install CentOS 4.6 to a pair of 750GB hard drives. I can successfully install to either of the drives as a single drive, but when I try to use both drives and mirror the partitions, I start having problems. Anaconda crashes as it is trying to format the drives. This is what I'm trying to create: /dev/md0: 200MB, /boot /dev/md1: 2GB, swap /dev/md2: rest of the drive, LVM PV LogVol00: 10GB, / LogVol01: rest of the VG, /home I uploaded the anaconda log to the CentOS bugtracker, but I don't know if or when I should expect a response from that, so I'm asking here as well. If you want to see the log, here's the link: http://bugs.centos.org/view.php?id=2652 Is there a way I can work around this problem? It has been suggested that I build the system with a single drive and then add the mirror to it. Is it possible to add a mirror to a partition that is an LVM PV? Can someone give me a link to a good set of instructions for doing this? Thanks, -- Bowie

4 3

NFS problem in the latest kernel (Was: [CentOS] MySQL issues with kernel-2.6.18-53.1.6.el5.x86_64.rpm)
by Akemi Yagi 06 Feb '08

06 Feb '08

On Jan 30, 2008 8:25 AM, Johnny Hughes <johnny(a)centos.org> wrote: > Joshua Baker-LePain wrote: > > On Wed, 30 Jan 2008 at 10:18am, Johnny Hughes wrote > > > >> Bent Terp wrote: > > > >>> Has something changed with regard to the mount options? We use > >>> (rw,noatime,rsize=8192,wsize=8192,hard,udp,context="system_u:object_r:httpd_sys_content_t:s0) > >>> > >>> which has worked fine until now. > >> > >> I am trying to duplicate your options ... and noatime is not a valid > >> option. > >> > >> Could you please double check the /etc/export options again so I can > >> try to duplicate the issue. > >> > >> Using my standard /etc/exports on 2 i686 test platforms I have no > >> problems at all. > >> > >> Here are the options I used on my test: > >> > >> (rw,insecure,sync,no_subtree_check) > > > > Those are NFS export options. The OP's list is *mount* options (i.e. on > > the client side). He stated that his NFS server is actually an EMC > > Cellera. > > > AH ... now I see. > > In any event, I can not duplicate the problem with an nfs export on c4 > or c5 and connecting with a c5 client, regardless of the kernel using i686. One other person has reported seemingly the same nfs problem in the Scientific Linux mail list: http://listserv.fnal.gov/scripts/wa.exe?A2=ind0801&L=scientific-linux-devel… According to this post, "It only seems to affect x86_64 systems, or affects them much more noticeably than it does i386 ones." Akemi

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RE: [CentOS] Installation problems with large mirrored drives
by Bowie Bailey 06 Feb '08

06 Feb '08

nate wrote: > Bowie Bailey wrote: > > > Is there a way I can work around this problem? It has been > > suggested that I build the system with a single drive and then add > > the mirror to it. Is it possible to add a mirror to a partition > > that is an LVM PV? Can someone give me a link to a good set of > > instructions for doing this? > > I work around it by not using LVM during installation. I've > experienced random crashes with anaconda going back to at least RHEL > 3 I think when LVM was used during install(kickstart specifically). > Often times if > I try a 2nd(or a 3rd) time I can get anaconda to go through without > crashing on LVM. > > If you really want LVM I'd suggest something like making your root and > boot(assuming you have seperate ones) partitions standalone mirrored > partitions, setup another pair of mirrored partitions that take up the > rest of the drive that you'll use for LVM, but don't make it LVM, just > make it a normal file system(this so it configures the software raid > end of things for you). > > Once the system is installed, then change the partition type of the > last mirrored pair to be LVM, and configure LVM. If you want your > /usr /var etc on LVM make the volumes, go to runlevel 1 and copy > the files to the new locations and re-mount the LVM volumes as > your /usr /var etc. I was able to install the system with no problems using the exact same filesystem layout (LVM and all) with a single drive. The problem only occurs when I try to mirror the partitions. I may give your suggestion a try tomorrow when I have more time to play with the system. -- Bowie

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Discuss February 2008