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interesting kvm lvm collision issue
by Iain Morris 27 Oct '10

27 Oct '10

I've been running into a reproducible problem when using default LVM volume group names to present block devices for virtual machines in KVM, and I'm wondering why it is happening. On dom0 I make a default VolGroup00 for the operating system. I make a second VolGroup01 for logical volumes that will be block devices for virtual systems. In VolGroup01, I make two lv's for one system: lv.sys1, and lv.sys1-data. I then build a new virtual machine called sys1, using lv.sys1 for the root filesystem, and lv.sys1-data for an independent data partition. Everything works great after installation, and vgdisplay on both systems looks great. If I then run vgscan, however, on the host system, it picks up the VolGroup01 I created _within_ the virtual machine, so I now have 2 VolGroup01's with different UUIDs showing up on dom0. Now I can see how vgscan would mistakenly see the VolGroup01 of sys1 on the block device lv.sys1-data, but why are the VolGroup00 vg's not colliding as well? When a pvdisplay is run, I have a new "physical volume" that is actually just a logical volume of the original VolGroup01: [root@iain2 ~]# pvdisplay WARNING: Duplicate VG name VolGroup01: Existing FNiKc9-BB3t-ziMg-prWW-n8RA-OMzk-obiKnf (created here) takes precedence over C8fNMV-aeSW-syIn-fWJZ-vJdK-N0As-Itrvfi WARNING: Duplicate VG name VolGroup01: Existing FNiKc9-BB3t-ziMg-prWW-n8RA-OMzk-obiKnf (created here) takes precedence over C8fNMV-aeSW-syIn-fWJZ-vJdK-N0As-Itrvfi --- Physical volume --- PV Name /dev/VolGroup01/lv-sys1-data VG Name VolGroup01 PV Size 40.00 GB / not usable 4.00 MB Allocatable yes (but full) PE Size (KByte) 4096 Total PE 10239 Free PE 0 Allocated PE 10239 PV UUID FTA4QU-ydZ7-e2Yy-nBsi-t4st-3jj7-IAkQH8 --- Physical volume --- PV Name /dev/sda3 VG Name VolGroup00 PV Size 39.06 GB / not usable 29.77 MB Allocatable yes (but full) PE Size (KByte) 32768 Total PE 1249 Free PE 0 Allocated PE 1249 PV UUID tTViks-3lBM-HGzV-mnN9-zRsT-fFT0-ZsJRse --- Physical volume --- PV Name /dev/sda2 VG Name VolGroup01 PV Size 240.31 GB / not usable 25.75 MB Allocatable yes PE Size (KByte) 32768 Total PE 7689 Free PE 5129 Allocated PE 2560 PV UUID ZE5Io3-WYIO-EfOQ-h03q-zGdF-Frpa-tm63fX Has anyone experienced this? It's very unnerving to know your data is intact as you add new logical volumes for kvm systems. I suppose the lesson learned here is to provide VGs with specific host names. -- -- - Iain Morris iain.t.morris(a)gmail.com

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Every user in LDAP queried when one user logs on.
by Gerrard Geldenhuis 27 Oct '10

27 Oct '10

Hi I have configured a machine to authenticate against LDAP. When I log onto the box using the newly created user I see a LDAP search request for every user that exist in the directory. If I have only 20 users even a 100 that is not a problem but when I start going to 10000 users I start getting some weird errors and timeouts because of the time it takes to download the data to the client. I have tested this against 389 Directory Server and OpenLDAP and both give the same behaviour described above. I have tried adding a nss_base directives in /etc/ldap.conf but it has had no effect. my /etc/ldap.conf: binddn uid=SysAuth,ou=Service Accounts,dc=mycompany bindpw secret pam_password clear base dc=betfair nss_base_passwd ou=people,dc=mycompany?sub nss_base_group ou=Groups,dc=mycompany?sub nss_base_group ou=PrivateGroups,dc=mycompany?sub nss_base_group ou=SystemGroups,dc=mycompany?sub sizelimit 1000 idle_timelimit 5 timelimit 10 bind_timelimit 5 nss_reconnect_tries 1 nss_reconnect_maxconntries 1 nss_reconnect_sleeptime 1 nss_reconnect_maxsleeptime 1 nss_reconnect_maxconntries 1 I have also played around with various debug levels in /etc/ldap.conf but I have not really been succesfull in matching requests I see there to requests I see in wireshark. The man page in centos (man pam_ldap and nss_ldap ) also does not make any mention of available log levels or what they do. I have also scanned the source code for some more info on log levels but did not find anything usefull. If it is in the source code then please point me to it. I have gone through the pam list logs and the closest I could find was the following thread: https://www.redhat.com/archives/pam-list/2009-September/thread.html and a similar thread in December 2010. This threads although similar is related to groups and my problem is with every user being queried. I am fairly certain (hopeful at least) that is a config error on my part but I have not been able to find that error yet and would welcome any assistance in finding the problem. My system-auth in /etc/pam.d/ looks as follows: auth required pam_env.so auth sufficient pam_unix.so nullok try_first_pass auth requisite pam_succeed_if.so uid >= 500 quiet auth sufficient pam_ldap.so use_first_pass auth required pam_deny.so account required pam_access.so account required pam_unix.so broken_shadow account sufficient pam_localuser.so account sufficient pam_succeed_if.so uid < 500 quiet account [default=bad success=ok user_unknown=ignore] pam_ldap.so debug account required pam_permit.so password requisite pam_cracklib.so try_first_pass retry=3 password sufficient pam_unix.so nullok try_first_pass use_authtok password sufficient pam_ldap.so use_authtok password required pam_deny.so session optional pam_keyinit.so revoke session required pam_limits.so session optional pam_mkhomedir.so session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid session required pam_unix.so session optional pam_ldap.so Using CentOS release 5.4 on the client and 5.5 on the server but I see the same result if the server is on 5.4. Regards ________________________________________________________________________ In order to protect our email recipients, Betfair Group use SkyScan from MessageLabs to scan all Incoming and Outgoing mail for viruses. ________________________________________________________________________

2 2

how to set ACLs on windows share
by admin lewis 27 Oct '10

27 Oct '10

Hi, I have to get/set acls on a windows share by script. I can mount the windows share by mount.cifs but I don't know how to set/get acls... anyone could help me ? thx so much. -- Admin Lewis

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OT: CreekFM - Fifty Thousand Watts of Pow Wow Power!
by Frank Cox 26 Oct '10

26 Oct '10

You may recall that in the early months of 2009 I was asking some questions about setting up a streaming audio server for a native-owned radio station. It is now up and running, and you're welcome to tune in. CHXL 95.3 CreekFM FIFTY THOUSAND WATTS of POW WOW POWER! Serving the File Hills First Nations, and the World! CreekFM is owned and operated by the Okanese First Nation on their reserve near Balcarres, Saskatchewan, Canada. It is the only native-owned and operated radio station in Saskatchewan. www.creekfm.com The webserver runs Apache on Centos 5. The audio server runs Ices and Icecast on Centos 5. -- MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com

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advice on using daemontools on centos production servers
by saurabh verma 26 Oct '10

26 Oct '10

Hi advisors , I would some suggestions on using http://cr.yp.to/daemontools.html . My requirements is to use less systems daemon checks in nagios but concentrate more on business / application level checks . We have lots of daemons like below > 1. ) snmpd > 2.) ntp > 3.) SSH > 4.) crond > 5.) php-cgi > 6.) nginx > 7.) Postfix > 8.) wackamole > 9.) spread > 10.) atop > 11.) redis > 12.) taillog-dopa > 13.) taillog-user > 14.) rsyncd ... ETC. We use nagios checks + event-handlers in case of daemon failure . My views is to use daemontool to control all these daemons , and create a single nagios check which scans /service/ directory and alerts for daemons which are getting restarting in unwanted ways. Some of my friends will argue about daemontools being non-unixy and unconventional , But I had good experience with daemontools on around 3000 servers earlier in my previous organization . Please advice what you guys think about daemontools and its pros and crons . Thanks , Saurabh Verma

2 1

RM Help
by Matt 26 Oct '10

26 Oct '10

Is there a way to tell rm -f to only remove a file if its owned by say mail? Matt

5 4

odd ClamAV error
by m.roth＠5-cent.us 26 Oct '10

26 Oct '10

Has anyone recently started seeing LibClamAV Warning: Cannot prepare for JIT, because it has already been converted to interpreter ? I can't find anything googling for that. mark

5 7

CentOS-announce Digest, Vol 68, Issue 13
by centos-announce-request＠centos.org 26 Oct '10

26 Oct '10

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-2010:0791 CentOS 5 i386 autofs Update (Karanbir Singh) 2. CEBA-2010:0791 CentOS 5 x86_64 autofs Update (Karanbir Singh) 3. CESA-2010:0792 Important CentOS 5 i386 kernel Update (Karanbir Singh) 4. CESA-2010:0792 Important CentOS 5 x86_64 kernel Update (Karanbir Singh) 5. CESA-2010:0793 Important CentOS 5 x86_64 glibc Update (Karanbir Singh) 6. CESA-2010:0793 Important CentOS 5 i386 glibc Update (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Mon, 25 Oct 2010 14:14:06 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CEBA-2010:0791 CentOS 5 i386 autofs Update To: centos-announce(a)centos.org Message-ID: <20101025141406.GA22346(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2010:0791 Upstream details at : https://rhn.redhat.com/errata/RHBA-2010-0791.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: ba2fbe8574f8205ad7467e68f0ed7145 autofs-5.0.1-0.rc2.143.el5_5.5.i386.rpm Source: aa0d697731d41b8ef9f678d2753a1721 autofs-5.0.1-0.rc2.143.el5_5.5.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Mon, 25 Oct 2010 14:14:06 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CEBA-2010:0791 CentOS 5 x86_64 autofs Update To: centos-announce(a)centos.org Message-ID: <20101025141406.GA22362(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2010:0791 Upstream details at : https://rhn.redhat.com/errata/RHBA-2010-0791.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: aba35c47f87a454ab4f328116d1926a7 autofs-5.0.1-0.rc2.143.el5_5.5.x86_64.rpm Source: aa0d697731d41b8ef9f678d2753a1721 autofs-5.0.1-0.rc2.143.el5_5.5.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Tue, 26 Oct 2010 06:38:54 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2010:0792 Important CentOS 5 i386 kernel Update To: centos-announce(a)centos.org Message-ID: <20101026063854.GA3551(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2010:0792 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0792.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: 6eed3e339f83dbc705f81dbaaa2f497e kernel-2.6.18-194.17.4.el5.i686.rpm 110496c9c3fad0e6fd1b2c20503bb6d7 kernel-debug-2.6.18-194.17.4.el5.i686.rpm 1fa92f4af990b7e451ed7471a69bf4a1 kernel-debug-devel-2.6.18-194.17.4.el5.i686.rpm 0374016b4d46383bb8f582d62dbf70a5 kernel-devel-2.6.18-194.17.4.el5.i686.rpm d668d3b3c7a5a1b15c64d8c1d9023b0c kernel-doc-2.6.18-194.17.4.el5.noarch.rpm 31ca4fe016abca86a6b31d9839fff4d5 kernel-headers-2.6.18-194.17.4.el5.i386.rpm 7df8bd1190b4b6f81f39fbd24c814cdb kernel-PAE-2.6.18-194.17.4.el5.i686.rpm 1d872f931457852424a08f172cff5308 kernel-PAE-devel-2.6.18-194.17.4.el5.i686.rpm 1b14852ed8018d97c2b94e623c9f0ca4 kernel-xen-2.6.18-194.17.4.el5.i686.rpm 7a27004b573ed631d767addf5fccb876 kernel-xen-devel-2.6.18-194.17.4.el5.i686.rpm Source: 41540d181c64557b254fc6145b9f339c kernel-2.6.18-194.17.4.el5.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 4 Date: Tue, 26 Oct 2010 06:38:54 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2010:0792 Important CentOS 5 x86_64 kernel Update To: centos-announce(a)centos.org Message-ID: <20101026063854.GA3566(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2010:0792 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0792.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: e3ba8071e4121057cc50999c5378a0b3 kernel-2.6.18-194.17.4.el5.x86_64.rpm 3aef293dd3289bc071a1f55a9748cea7 kernel-debug-2.6.18-194.17.4.el5.x86_64.rpm afc2c51be23dc7aa1af491eea8e4d5da kernel-debug-devel-2.6.18-194.17.4.el5.x86_64.rpm ca3d9f485c81aef1c1e4b3ddb9598eea kernel-devel-2.6.18-194.17.4.el5.x86_64.rpm f97d92f769e94221f843e2bd0cd0d6ef kernel-doc-2.6.18-194.17.4.el5.noarch.rpm 75c9d369a776d5fb5cf55d534e2d5949 kernel-headers-2.6.18-194.17.4.el5.x86_64.rpm bc6f6c33a7bb86c4922f3fd9e2e3acc8 kernel-xen-2.6.18-194.17.4.el5.x86_64.rpm 2b71b5bc90c47cf091ee858dbaefaa52 kernel-xen-devel-2.6.18-194.17.4.el5.x86_64.rpm Source: 41540d181c64557b254fc6145b9f339c kernel-2.6.18-194.17.4.el5.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 5 Date: Tue, 26 Oct 2010 06:41:50 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2010:0793 Important CentOS 5 x86_64 glibc Update To: centos-announce(a)centos.org Message-ID: <20101026064150.GA3731(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2010:0793 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0793.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: ece267e4a12c5f7948dd496e3d8a2270 glibc-2.5-49.el5_5.7.i686.rpm 75c95d1b7dc3f567d6423090df8d4fd8 glibc-2.5-49.el5_5.7.x86_64.rpm e4c9fd18392f84cd770b987b5010e039 glibc-common-2.5-49.el5_5.7.x86_64.rpm 0ee2261a0dce330e892db01736f93bb1 glibc-devel-2.5-49.el5_5.7.i386.rpm 17c3ec48c3d2b50960e966d86a939318 glibc-devel-2.5-49.el5_5.7.x86_64.rpm 801f24f849daa629920e166cb9c8bfaa glibc-headers-2.5-49.el5_5.7.x86_64.rpm cd108e29e1a19bac5114ca5b101a87f5 glibc-utils-2.5-49.el5_5.7.x86_64.rpm 5ab6832aadc5b6fd30c7a7070c544dce nscd-2.5-49.el5_5.7.x86_64.rpm Source: 048f01659c3b6681fd44d54422512aab glibc-2.5-49.el5_5.7.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 6 Date: Tue, 26 Oct 2010 06:41:49 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2010:0793 Important CentOS 5 i386 glibc Update To: centos-announce(a)centos.org Message-ID: <20101026064149.GA3717(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2010:0793 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0793.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: 7fa05a9d941bb75a22f4fa69cb1b06a0 glibc-2.5-49.el5_5.7.i386.rpm e28402ff6046ff33b69dcb7ac9f3aeeb glibc-2.5-49.el5_5.7.i686.rpm ade720d53f51ec224fae59d63043b67b glibc-common-2.5-49.el5_5.7.i386.rpm e87415c77c690167ca7001ce6ce0885f glibc-devel-2.5-49.el5_5.7.i386.rpm d740792eb47133d2495f87de3e75f9b3 glibc-headers-2.5-49.el5_5.7.i386.rpm 49d9e74715a0c86ac7fa00321a2875a5 glibc-utils-2.5-49.el5_5.7.i386.rpm f0cba47416c83107684da09bb235e295 nscd-2.5-49.el5_5.7.i386.rpm Source: 048f01659c3b6681fd44d54422512aab glibc-2.5-49.el5_5.7.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #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 68, Issue 13 ***********************************************

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X windows won't start after update to autofs
by Gilbert Sebenste 26 Oct '10

26 Oct '10

Hello everyone, Maybe this doesn't make sense, but after I updated autofs yesterday and rebooted this morning, X windows won't go. It tries with the old configuration---doesn't work. It tries a fresh config and fails. I can't copy and paste, but it says screens found, but no usable configuration. Couldn't start X server on card 0 Couldn't start X server with old config, (EE) NV(0): No valid initial configuration found (EE) Screen(s) found, but none have a usuble configuration. Fatal server error: No screens found Anyone have ideas? ******************************************************************************* Gilbert Sebenste ******** (My opinions only!) ****** Staff Meteorologist, Northern Illinois University **** E-mail: sebenste(a)weather.admin.niu.edu *** web: http://weather.admin.niu.edu ** *******************************************************************************

2 3

Memory warning
by m.roth＠5-cent.us 26 Oct '10

26 Oct '10

Folks, Something to watch out for: in the last few months, we've gotten a bunch of new computers (end of budget year), and several have had serious memory errors. If they were all from one manufacturer, I'd figure it was them, but we have had this happen on a Sun, a Dell, and a Penguin, and the large memory (4G, 8G) in all of them was manufactured by Hynix. mark, about to talk to Dell and Sun

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