Discuss March 2013

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206 participants
230 discussions

nscd
by m.roth＠5-cent.us 26 Mar '13

26 Mar '13

Has anyone had problems accessing random websites since going up to 6.4? Since about the day after I got partly upgraded, if I try to access nytimes.com, or orbitz.com, I get server not found. With a lot of work, I, my manager, and the other admin, found that setting options edns0 in /etc/resolv.conf fixed it - I suspect that the network folks updated their internal nameservers (which are M$) about that time... but... we got this Thurs. Friday, I went to look, lunchtime, at a story, and back to the same. Later, and I think I was playing around, it came back. Just now, over lunch, it failed... until I restarted nscd. My manager tells me it's caching... but it seems to be caching momentary failures. So: has anyone else seen oddness that might be related to nscd? mark

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PHP Questions on move from CentOS 5.x to CentOS 6.x
by Max Pyziur 25 Mar '13

25 Mar '13

Greetings, A malfunctioning disk this past week accelerated a lingering decision to move to CentOS 6.x from CentOS 5.x. Most of our content is functioning and being presented as it should be. However, there appear to be php-related issues. Basic squirrelmail (a php-dependent package) works correctly. However, drupal, and other php-dependent parts that call postgresql and mysql databases of our site are not being presented. Apache's log files show a 503 (for postgresql) and 500 (for mysql) errors I'm troubleshooting this through obvious channels (looking at logfiles, searching google, sdiff'ing configuration files). However, if someone has suggestions or answers, please do speak up! Much thanks, Max Pyziur pyz(a)brama.com

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Bonded interfaces - testing
by Dermot 25 Mar '13

25 Mar '13

Hi, I have 2 servers running CentOS 6.3. Each has four 1gb Ethernet ports. I have bonded all four ports on each server and patched them to the same switch (following the instructions at http://wiki.centos.org/TipsAndTricks/BondingInterfaces) I have created aggregated trunks for the servers respective ports on the switch. The switch reports that the ports are up and that the Link Aggregation is enabled. I was under the impression, perhaps falsely, that I would see an improvement in the throughput. I am not sure that I am. I used a utility call nuttcp before the trunking and after to test the throughput. I am seeing miniscule differences in the Mbps. I am not sure that I am testing correctly. Perhaps the speed will not change but the available bandwidth has increased. Is there some way to demonstrate that I am able to transfer data from these two servers at a rate of 4,000Mbs? Does anyone have any thoughts? I pasted some details below increase they have a bearing. Thanks in advance Dermot. ./nuttcp otherserver 1125.6573 MB / 10.03 sec = 941.4967 Mbps 10 %TX 47 %RX cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009) Bonding Mode: IEEE 802.3ad Dynamic link aggregation Transmit Hash Policy: layer2 (0) MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 802.3ad info LACP rate: slow Aggregator selection policy (ad_select): stable Active Aggregator Info: Aggregator ID: 2 Number of ports: 4 Actor Key: 17 Partner Key: 420 Partner Mac Address: 10:0d:7f:4c:16:ca Slave Interface: eth0 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 2c:76:8a:5d:28:1c Aggregator ID: 2 Slave queue ID: 0 Slave Interface: eth1 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 2c:76:8a:5d:28:1d Aggregator ID: 2 Slave queue ID: 0 Slave Interface: eth2 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 2c:76:8a:5d:28:1e Aggregator ID: 2 Slave queue ID: 0 Slave Interface: eth3 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 2c:76:8a:5d:28:1f Aggregator ID: 2 Slave queue ID: 0

2 2

maintaining patches across releases
by Keith Keller 25 Mar '13

25 Mar '13

Hi all, I have what might be a foolish question about patching packages. I am not sure exactly how to phrase the question, so please follow up if it seems as though I'm not being clear. I was looking at this bug which my machines are currently experiencing: https://bugzilla.redhat.com/show_bug.cgi?id=883905 The proposed patch is literally one new line in the XFS codebase. So since the patch is so straightforward, I had a crazy idea that I would build my own kernel with this patch, and test it out to see if it worked. (It's been many years since I built my own kernel, so that would be an adventure in and of itself.) My worry would be, I would want to make sure that I propagated this patch every time I updated the kernel package. Is this something others do regularly? If so, is there a standard way of managing the process of applying one's own patches to a series of source packages, and being able to re-patch and rebuild updated packages? I'm guessing that I just need to build xfs.ko. Are there any gotchas beyond the wiki entry on building your own kernel modules? That page seems to target CentOS 5, not 6, but I imagine the process is quite similar. --keith -- kkeller(a)wombat.san-francisco.ca.us

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Centos 6.3 Network bnx2 Problem on HP DL360
by Woehrle Hartmut SBB CFF FFS (Extern) 25 Mar '13

25 Mar '13

Hello Mailing List I got a severe network error message at a HP DL360 Server. The kernel log says: ----------------------------------- /var/log/messages ----------------------------------------------------------------- Mar 19 15:45:06 server kernel: do_IRQ: 2.168 No irq handler for vector (irq -1) Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: intr_sem[0] PCI_CMD[00100446] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: PCI_PM[19002108] PCI_MISC_CFG[92000088] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: EMAC_TX_STATUS[00000008] EMAC_RX_STATUS[00000006] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: RPM_MGMT_PKT_CTRL[40000088] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: HC_STATS_INTERRUPT_STATUS[017f0080] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: PBA[00000000] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: <--- start MCP states dump ---> Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: MCP_STATE_P0[0003610e] MCP_STATE_P1[0003610e] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: MCP mode[0000b880] state[80008000] evt_mask[00000500] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: pc[0800adec] pc[0800aeb0] instr[8fb10014] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: shmem states: Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: drv_mb[0103000f] fw_mb[0000000f] link_status[0000006f] drv_pulse_mb[0000432b] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: dev_info_signature[44564903] reset_type[01005254] condition[0003610e] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: 000003cc: 44444444 44444444 44444444 00000a3c Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: 000003dc: 0ffeffff 0000ffff ffffffff ffffffff Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: 000003ec: 00000000 00000000 00000000 00000002 Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: DEBUG: 0x3fc[0000ffff] Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: <--- end MCP states dump ---> Mar 19 15:45:17 server kernel: bnx2 0000:02:00.1: eth1: NIC Copper Link is Down Mar 19 15:45:20 server kernel: bnx2 0000:02:00.1: eth1: NIC Copper Link is Up, 1000 Mbps full duplex ----------------------------------------------------------------------------------------------------------------------------------- Does anyone know that problem? System is Centos 6.3 Kernel Linux server 2.6.32-279.5.2.el6.centos.plus.x86_64 #1 SMP Fri Aug 24 00:25:34 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Thanks Hartmut

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OT: Please join the Centos team at http://folding.stanford.edu/
by Fred Smith 25 Mar '13

25 Mar '13

Hi all! I'm not the team captain, I'm just (one of the few remaining) active team members. There are 78 registered members, only four of us are currently active. So, come on, gang, lets show some team spirit! If you don't know what I'm talking about, please visit: http://folding.stanford.edu/ to find out. it's a big scientific project to examine the way proteins fold, and what kinds of things can (and do) go wrong when they mis-fold. Many illnesses are caused or complicated by mis-folding of proteins. It's a very computationally intensive field, and they need all the CPUs and/or GPUs they can get to be cranking away on their simulations. Check out team centos and if you can spare some CPU cycles, please join up and contribute. Team statistics page: http://fah-web.stanford.edu/cgi-bin/main.py?qtype=teampage&teamnum=48721 Team captain's page: http://www.sharons.org.uk/cf.html Note that the info there on how to set up the client is now obsolete. The home page (given above) of the project will allow you to download the latest client software and show you how to install it. Unlike earlier versions, this one is easy to install and run. Come on Centos folks, join the team! :) Fred -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ---------------------------- Do you not know? Have you not heard? The LORD is the everlasting God, the Creator of the ends of the earth. He will not grow tired or weary, and his understanding no one can fathom. ----------------------------- Isaiah 40:28 (niv) -----------------------------

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CentOS 6 : Tip for significantly increasing battery life / reducing power consumption (Thinkpad X220 Tablet)
by Mathieu Baudier 24 Mar '13

24 Mar '13

Hello, I was not happy with the power consumption of CentOS 6 x86_64 on a new Lenovo Thinkpad x220 Tablet and I worked on reducing it. I just wanted to share with the list one of the changes which gave me the most significant improvement. As per http://www.williambrownstreet.net/blog/?p=387, add the following kernel arguments to the GRUB boot configuration: pcie_aspm=force i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 (in /boot/efi/EFI/redhat/grub.conf since I use EFI, /boot/grub/grub.conf otherwise) As measured using PowerTop, this made the power consumption decrease from 20W to 11W ! (I had already decreased it from 25W to 20W with the usual tips of disabling hardware, shutting down services, switching tuned profiles, etc.) All in all, battery time was more than multiplied by two, and the computer is now much more silent since the fan is not always running like mad in order to cool the processor. The bottom of the laptop is not anymore hot as hell. I don't know whether this would have an impact on other hardware, but it may be worth looking at it (even on servers?), since the above link points to descriptions of a regression in the kernel which seems more general. As a side note, the Power Management Guide of Red Hat is a good resource (analysis tools + tuned profiles): http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Po… Cheers, Mathieu PS: Do you think I should book a bug in the upstream bug tracker?

5 8

Re: [CentOS] PHP Questions on move from CentOS 5.x to CentOS 6.x (fwd)
by Max Pyziur 24 Mar '13

24 Mar '13

---------- Forwarded message ---------- Date: Sun, 24 Mar 2013 12:52:37 -0400 (EDT) From: Max Pyziur <pyz(a)brama.com> To: Reindl Harald <h.reindl(a)thelounge.net> Cc: CentOS mailing list <centos(a)centos.org> Subject: Re: [CentOS] PHP Questions on move from CentOS 5.x to CentOS 6.x On Sun, 24 Mar 2013, Reindl Harald wrote: > > > Am 24.03.2013 17:38, schrieb Max Pyziur: >> In both mysql and postgresql I dumped to text and restored on the new >> CentOS 6 box/server. >> >> For postgresql, that's the recommendation. >> >> So far from command line and their respective command-line monitors, the >> mysql and postgresql databases are correctly functioning. >> >> It's the php-enabled interfaces that are the issue for me > > and what says "php -m" or "rpm -qa | grep php"? On CentOS 5 php-5.1.6-39.el5_8 php-cli-5.1.6-39.el5_8 php-common-5.1.6-39.el5_8 php-devel-5.1.6-39.el5_8 php-gd-5.1.6-39.el5_8 php-ldap-5.1.6-39.el5_8 php-mbstring-5.1.6-39.el5_8 php-mcrypt-5.1.6-15.el5.centos.1 phpmyadmin-2.11.11.3-2.el5.rf php-mysql-5.1.6-39.el5_8 php-pdo-5.1.6-39.el5_8 php-pgsql-5.1.6-39.el5_8 On CentOS 6 php-5.3.3-22.el6.x86_64 php-cli-5.3.3-22.el6.x86_64 php-common-5.3.3-22.el6.x86_64 php-enchant-5.3.3-22.el6.x86_64 php-gd-5.3.3-22.el6.x86_64 php-IDNA_Convert-0.8.0-1.el6.noarch php-ldap-5.3.3-22.el6.x86_64 php-mbstring-5.3.3-22.el6.x86_64 php-mcrypt-5.3.3-1.el6.x86_64 phpMyAdmin-3.5.7-1.el6.noarch php-mysql-5.3.3-22.el6.x86_64 php-pdo-5.3.3-22.el6.x86_64 php-pear-1.9.4-4.el6.noarch php-pgsql-5.3.3-22.el6.x86_64 php-php-gettext-1.0.11-3.el6.noarch php-PHPMailer-5.2.2-1.el6.noarch php-process-5.3.3-22.el6.x86_64 php-simplepie-1.3.1-3.el6.noarch php-xml-5.3.3-22.el6.x86_64 Diffing php -m results: sdiff -s phpM-CentOS6.txt phpM-CentOS5.txt Core < dom | dbase enchant < ereg < fileinfo < filter < json < > mime_magic Phar < readline | pspell sqlite3 < xmlreader < xmlwriter < xsl < zip < > > are the extensions installed/loaded? Please clarify; what extensions? MP pyz(a)brama.com

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[Fwd: Re: PHP Questions on move from CentOS 5.x to CentOS 6.x]
by Max Pyziur 24 Mar '13

24 Mar '13

---------------------------- Original Message ---------------------------- Subject: Re: [CentOS] PHP Questions on move from CentOS 5.x to CentOS 6.x From: "Max Pyziur" <pyz(a)brama.com> Date: Sun, March 24, 2013 1:14 pm To: "Reindl Harald" <h.reindl(a)thelounge.net> -------------------------------------------------------------------------- > > > Am 24.03.2013 17:52, schrieb Max Pyziur: >> Diffing php -m results: > > a diff does not interest > i requested explcitly the output of "php -m" on the new machine On CentOS 5 it is: php -m [PHP Modules] bz2 calendar ctype curl date dbase exif ftp gd gettext gmp hash iconv ldap libxml mbstring mcrypt mime_magic mysql mysqli openssl pcntl pcre PDO pdo_mysql pdo_pgsql pdo_sqlite pgsql posix pspell Reflection session shmop SimpleXML sockets SPL standard sysvmsg sysvsem sysvshm tokenizer wddx xml zlib [Zend Modules] On CentOS 6 php -m [PHP Modules] bz2 calendar Core ctype curl date dom enchant ereg exif fileinfo filter ftp gd gettext gmp hash iconv json ldap libxml mbstring mcrypt mysql mysqli openssl pcntl pcre PDO pdo_mysql pdo_pgsql pdo_sqlite pgsql Phar posix readline Reflection session shmop SimpleXML sockets SPL sqlite3 standard sysvmsg sysvsem sysvshm tokenizer wddx xml xmlreader xmlwriter xsl zip zlib [Zend Modules] > the packaging may have changed and things which are now loaded > via "extension = xyz.so" maybe built-in in the older realase > or vice versa and "php -m " shows what is loaded without make > a difference of static or loaded as module > >>> are the extensions installed/loaded? >> >> Please clarify; what extensions? > > the database-extensions you need? > > [root@centos ~]# php -m | grep mysql > mysql > mysqli > pdo_mysql Like this?: php -m | egrep '(mysql|pgsql)' mysql mysqli pdo_mysql pdo_pgsql pgsql MP pyz(a)brama.com

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Re: [CentOS] PHP Questions on move from CentOS 5.x to CentOS 6.x
by Max Pyziur 24 Mar '13

24 Mar '13

On Sun, 24 Mar 2013, Reindl Harald wrote: > > > Am 24.03.2013 17:38, schrieb Max Pyziur: >> In both mysql and postgresql I dumped to text and restored on the new >> CentOS 6 box/server. >> >> For postgresql, that's the recommendation. >> >> So far from command line and their respective command-line monitors, the >> mysql and postgresql databases are correctly functioning. >> >> It's the php-enabled interfaces that are the issue for me > > and what says "php -m" or "rpm -qa | grep php"? On CentOS 5 php-5.1.6-39.el5_8 php-cli-5.1.6-39.el5_8 php-common-5.1.6-39.el5_8 php-devel-5.1.6-39.el5_8 php-gd-5.1.6-39.el5_8 php-ldap-5.1.6-39.el5_8 php-mbstring-5.1.6-39.el5_8 php-mcrypt-5.1.6-15.el5.centos.1 phpmyadmin-2.11.11.3-2.el5.rf php-mysql-5.1.6-39.el5_8 php-pdo-5.1.6-39.el5_8 php-pgsql-5.1.6-39.el5_8 On CentOS 6 php-5.3.3-22.el6.x86_64 php-cli-5.3.3-22.el6.x86_64 php-common-5.3.3-22.el6.x86_64 php-enchant-5.3.3-22.el6.x86_64 php-gd-5.3.3-22.el6.x86_64 php-IDNA_Convert-0.8.0-1.el6.noarch php-ldap-5.3.3-22.el6.x86_64 php-mbstring-5.3.3-22.el6.x86_64 php-mcrypt-5.3.3-1.el6.x86_64 phpMyAdmin-3.5.7-1.el6.noarch php-mysql-5.3.3-22.el6.x86_64 php-pdo-5.3.3-22.el6.x86_64 php-pear-1.9.4-4.el6.noarch php-pgsql-5.3.3-22.el6.x86_64 php-php-gettext-1.0.11-3.el6.noarch php-PHPMailer-5.2.2-1.el6.noarch php-process-5.3.3-22.el6.x86_64 php-simplepie-1.3.1-3.el6.noarch php-xml-5.3.3-22.el6.x86_64 Diffing php -m results: sdiff -s phpM-CentOS6.txt phpM-CentOS5.txt Core < dom | dbase enchant < ereg < fileinfo < filter < json < > mime_magic Phar < readline | pspell sqlite3 < xmlreader < xmlwriter < xsl < zip < > > are the extensions installed/loaded? Please clarify; what extensions? MP pyz(a)brama.com

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Discuss March 2013