Discuss July 2010

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242 participants
193 discussions

LVM issue
by Phil Manuel 21 Jul '10

21 Jul '10

Hi We use AoE disks for some of our systems. Currently, a 15.65Tb filesystem we have is full, I then extended the LVM by a further 4Tb but resize4fs could not handle a filesystem over 16Tb (CentOS 5.5). I then reduced the lvm by the same amount, and attempted to create a new LV, but get this error message in the process lvcreate -v -ndata2 -L2T -t aoe Test mode: Metadata will NOT be updated. Setting logging type to disk Finding volume group "aoe" Test mode: Skipping archiving of volume group. Creating logical volume data2 Test mode: Skipping volume group backup. Found volume group "aoe" Aborting. Failed to activate new LV to wipe the start of it. Found volume group "aoe" Unable to deactivate failed new LV. Manual intervention required. Test mode: Wiping internal cache Wiping internal VG cache pvs PV VG Fmt Attr PSize PFree /dev/etherd/e2.0 aoe lvm2 a- 9.10T 7.10T /dev/etherd/e2.4 aoe lvm2 a- 13.65T 0 vgs VG #PV #LV #SN Attr VSize VFree aoe 2 1 0 wz--n- 22.74T 7.10T lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert data aoe -wi-ao 15.65T I've run a vgscan but this didn't help. So any ideas what step I've missed to enable me to create the new LV ? Thanks Phil.

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Re: [CentOS] Fwd: Re: Problem with yum
by James B. Byrne 21 Jul '10

21 Jul '10

On Mon, July 19, 2010 16:01, James Hogarth wrote: > Sent from Android mobile > > ---------- Forwarded message ---------- > From: "James Hogarth" <james.hogarth(a)gmail.com> > Date: 19 Jul 2010 21:00 > Subject: Re: [CentOS] Problem with yum > To: "CentOS mailing list" <centos(a)centos.org> > > With the kernel logging an out of memory error? My first instinct > would be > to check free to see the status of RAM and swap and perhaps end > unnecessary > processes.. What I ended up doing was rebooting the server and that seems to have cleared the problem. Trying yum clear all did not work as the yum process stalled as before. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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nss_pam against centos-ds fails for non-root users
by Nicolai Stange 21 Jul '10

21 Jul '10

Hi all, I'm new to LDAP and want to use nss_ldap (version 253) against a centos directory server (version 8.1.0) running on the same host. The great mystery is, that as root everything works find, but as any other local user, it does not: root$ getent passwd [...] ldap:x:55:55:LDAP User:/var/lib/ldap:/bin/false ns:*:4000:4000:Nicolai Stange:/home/ns:/bin/bash root$ su some_local_user - some_local_user$ getent passwd [...] ldap:x:55:55:LDAP User:/var/lib/ldap:/bin/false some_local_user$ It just hangs for a while after printing the local user 'ldap' on the screen and then exits without displaying the ldap-user 'ns'. Instead /var/log/dirsrv/slapd-ldap/access the following lines appear: [20/Jul/2010:21:48:38 +0200] conn=14 fd=65 slot=65 SSL connection from 192.168.1.2 to 192.168.1.2. [20/Jul/2010:21:48:38 +0200] conn=14 op=-1 fd=65 closed - Encountered end of file. The only entries in my /etc/ldap.conf are those: tls_cacertfile /etc/nss/ca.example.org-cert.pem tls_cert /etc/nss/nss-cert.pem tls_key /etc/nss/nss-key.pem The nss-{key,cert}.pem may be used to bind at the following DN: dn: cn=nss,ou=Special Users,dc=example,dc=org objectClass: top objectClass: person cn: nss sn: nss Again: It works for user root! $ ls -l /etc/ldap.conf /etc/nss/ -rw-r--r-- 1 root root 9186 Jul 20 22:05 /etc/ldap.conf /etc/nss/: total 12 -rw------- 1 root root 1261 Jul 19 23:16 ca.example.org-cert.pem -rw------- 1 root root 1289 Jul 19 23:16 nss-cert.pem -r-------- 1 root root 1821 Jul 19 23:16 nss-key.pem $ Setting ownerships to world readable, e.g. $ ls -l /etc/ldap.conf /etc/nss/ -rw-r--r-- 1 root root 9186 Jul 20 22:05 /etc/ldap.conf /etc/nss/: total 12 -rw-r--r-- 1 root root 1261 Jul 19 23:16 ca.example.org-cert.pem -rw-r--r-- 1 root root 1289 Jul 19 23:16 nss-cert.pem -r--r--r-- 1 root root 1821 Jul 19 23:16 nss-key.pem $ doesn't change anything. Just for completeness the entry for the ldap-user 'ns': dn: uid=ns,ou=People,dc=example,dc=org objectClass: top objectClass: inetOrgPerson objectClass: posixAccount objectClass: organizationalPerson objectClass: person cn: Nicolai Stange displayName: Nicolai Stange sn: Stange givenName: Nicolai initials: NS uid: ns mail: nicolai.stange(a)example.org preferredLanguage: de, en;q=0.8 homeDirectory: /home/ns uidNumber: 4000 gidNumber: 4000 loginShell: /bin/bash userPassword: {SSHA}some_ssha_encrypted_pw I would really appreciate your help, I have no clue what the reason for this could be... Wishes Nicolai

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compilers a security risk?
by Dave Stevens 21 Jul '10

21 Jul '10

I manage a web hosting server that we've recently upgraded, in part so we could accommodate a domain that will enable community mapping. In a recent exchange of mails one developer said: "I could build the package directly on the server machine you have, provided that the potential security risk posed by having compilers installed is not an issue." and another said: "What sort of security risk is there in having compilers installed on a working server? "Obviously we can remove the compilers, however when Mapserver or postgis get updated, we will need to build new packages somewhere. One option: create a second VM for mapchat. We'll put the build environment on it, and only turn it on to make new packages." I don't have enough experience to assess the security issues. Does anyone have an opinion on this? It would be simple and feasible to allocate another domain as suggested above. Dave -- "It is no measure of health to be well adjusted to a profoundly sick society." Krishnamurti

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samba upgrade 3.0 - 3.x problem convert passdb.tdb
by camun 20 Jul '10

20 Jul '10

Hello after several days of searching, I have not found a definitive answer to the problem samba Migrating from 3.0.x to 3.3.x. (Migrating from 3.0.x to 3.3.x Can Fail to Update passdb.tdb Correctly (bug # 6195) . passdb.tdb break occurs in the file where the new samba starts. Any suggestions or someone going through the same problem? (I'm running samba 3.0.28 with upgrade to 3.5.4 (Sernet repo) []´s Camun.

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freetype bytecode interpreter
by Frank Cox 20 Jul '10

20 Jul '10

It may yet be too early to get a definite answer about this, but I'm wondering what the status of the formerly patented bytecode interpreter in freetype will be in RHEL/Centos 6 and possibly future updates to RHEL/Centos 5. The patent on the technology has apparently now expired. http://freetype.sourceforge.net/patents.html and http://apple.slashdot.org/story/10/07/19/1524250/FreeType-Project-Cheers-Tr… Effective with freetype 2.4 the technology will enabled by default at the freetype website. I just checked and the version in the RHEL 6 beta appears to be 2.3.11 -- MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com

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Re: [CentOS] boot process glitch due to missing 2nd disk
by Miguel Medalha 20 Jul '10

20 Jul '10

This is not a "Dell-specific BIOS hack". Dear child, ask your folks about PCs. I think it was only this decade that PCs would actually boot *without* a keyboard. EVERY PC EVER MADE before would not. Nah! Every BIOS since I remember (at least from 1990) had a choice on the first page, Standard BIOS Setup. "Halt on all errors, Halt on keyboard/video errors, Halt on no errors". At least these three were always present. Of course the default is always "Halt on all errors". Unless you modify the settings on purpose, that's what happens.

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Odd fsck problem
by m.roth＠5-cent.us 20 Jul '10

20 Jul '10

In the last month - definitely after going to 5.5 - I've tried to fsck a drive (340 days, or some such, unchecked). 960G RAID 5, I *think*, possibly serial port attachment to a JetStore RAID array. Every time I try, it gets to 70.0%, and stops. As in, I left it run last night, having started it late afternoon, and around 23:00, it was still exactly there, not even .1% more. On that, I also had a -dd flag, since running it the other day with a -d gave me nothing at all of debugging info; neither did the dd. Note that my manager tried to run one on another server, also attached to a JetStore, and it also stopped at the exact same point. This has never happened before, and fsck has handled these in the past. Anyone seen anything like this, and/or have ideas as to what I can do to fsck to at least *tell* me why it was gagging? mark

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Kickstart User Guide in PDF & DVI format
by Keith Roberts 20 Jul '10

20 Jul '10

Hi all. I have uploaded a PDF and DVI version of the Kickstart manual for anyone to download and use. I created this for my own personal use when learning to write kickstart files. You can grab the bits from here: http://www.karsites.net/centos/anyuser/kickstart-PDF-manual.php Feedback or any errata welcomed so I can keep this up to date. Kind Regards, Keith Roberts ----------------------------------------------------------------- Websites: http://www.php-debuggers.net http://www.karsites.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------------

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"Cannot allocate memory" java exception - apache still returns "200 OK"
by Sean Carolan 20 Jul '10

20 Jul '10

I'm configuring some monitoring for a particular java/tomcat application. We have noticed the occasional "Cannot allocate memory" error. When this occurs apache still seems to return a "200 OK" status code. Anyone know how to configure this so that when java has an error, apache will also return some kind of error?

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Discuss July 2010