Discuss September 2009

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293 discussions

Centos 5.3 32-bit and xen 3.4.0
by For＠ll 27 Sep '09

27 Sep '09

Hi, I have centos 5.3 with only text console only not X server, now I try install solaris 10 at xen with full virtualization (hvm) Now I have some like "zombie domain" Name ID Mem VCPUs State Time(s) Domain-0 0 2998 2 r----- 33.5 solekhvm 1024 1 0.0 solekhvm2 1024 1 0.0 solekhvm3 1024 0 0.4 How I can to kill this? If I reboot the server it doesn't help. virt-install -n solekhvm3 --ram 1024 --hvm --disk path=/dev/vol1/solek --vnc --cdrom /dev/cdrom --os-variant solaris10 --force Runing instalation... Create domain... | 0 B 00:01 (virt-viewer:3883): Gtk-WARNING **: cannot open display: Is any option to create a domain without a X server? Redirect X to another server? For@ll

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SUMMARY : multipath using defaults rather than multipath.conf contents for some devices (?) - why ?
by McCulloch, Alan 27 Sep '09

27 Sep '09

The reason for the behaviour observed below turned out to be that the device entry in /etc/multipath.conf was inadvertently appended *after* the devices section , rather than inside it - so that we had #devices { # device { # blah blah # } (file has a bunch of defaults commented out) # etc #} # # device { our settings } *rather than* devices { device { our settings } } Also - looking more closely at our multipath.conf.defaults, there is an entry for a product pattern HSV2.* That would explain why the multipath settings for the HSV200 looked different to the HSV400 - the HSV200 was picking up a different set of defaults. However still not exactly what we had specified. (sort of like CSS behaviour....."cascading multipath.conf defaults" ! :-) ) You also possibly need to pay attention to the basic whitespace formatting of this file - for example I had noticed the above early on and rebooted with it "fixed" , only to find that this meant the system came up unable to even recognise the ext3 filesystem, complaining about bad superblock etc etc. After recovering from that ( see below) I went back ( a week later) and a) made sure that the whitespace - tabs etc - looked like the other commented out defaults and b) added in a second device entry (from the defaults section - not a device we even have) , just in case there was some bug relating to having only one device entry in the "devices" section. Whether because of those or some other change, the system now comes up fine, and with multipath -ll now reporting the correct settings for the HSV400. So issue resolved finally. Touch wood. Here is a useful tip (not news to gurus but was to me ) : when things turn to custard on reboot and everything including the root filesystem is mounted readonly - so you can't even restore multipath.conf to the backup you made before rebooting - you can mount -n -o remount / to remount / as writeable - then you can cd /etc cp multipath.conf.bu1 multipath.conf and breathe a big sigh of relief ! If there are any multipath developers reading this - it could be handy if multipath could log some diagnostic info about how it parses the conf file , and exactly what entry it ends up using , which would then appear in /var/log/messages and /var/log/dmesg, since it seems relatively easy to end up matching a device spec you didn't expect, and the effects on performance are subtle so easy to overlook this. Cheers AMcC ------------------------ original post ------------------------ hi all We have a rh linux server connected to two HP SAN controllers, one an HSV200 (on the way out), the other an HSV400 (on the way in). (Via a Qlogic HBA). /etc/multipath.conf contains this : device { vendor "(COMPAQ|HP)" product "HSV1[01]1|HSV2[01]0|HSV300|HSV4[05]0" getuid_callout "/sbin/scsi_id -g -u -s /block/%n" prio_callout "/sbin/mpath_prio_alua /dev/%n" hardware_handler "0" path_selector "round-robin 0" path_grouping_policy group_by_prio failback immediate rr_weight uniform no_path_retry 18 rr_min_io 100 path_checker tur } - but our actual multipathing as shown by multipath -ll , and multipath -ll -v 3 looks as though for the HSV400 it is using the defaults rather than these settings. The defaults are #defaults { # udev_dir /dev # polling_interval 10 # selector "round-robin 0" # path_grouping_policy multibus # getuid_callout "/sbin/scsi_id -g -u -s /block/%n" # prio_callout /bin/true # path_checker readsector0 # rr_min_io 100 # rr_weight priorities # failback immediate # no_path_retry fail # user_friendly_name yes and multipath -ll reports : . . [snip other HSV400 paths - all similar] mpath12 (3600508b40007518f0000900000520000) dm-1 HP,HSV400 [size=150G][features=0][hwhandler=0] \_ round-robin 0 [prio=1][active] \_ 0:0:5:9 sdab 65:176 [active][ready] \_ round-robin 0 [prio=1][enabled] \_ 0:0:3:9 sdn 8:208 [active][ready] \_ round-robin 0 [prio=1][enabled] \_ 0:0:4:9 sdu 65:64 [active][ready] mpath11 (3600508b40007518f0000700000370000) dm-6 HP,HSV200 [size=200G][features=1 queue_if_no_path][hwhandler=0] \_ round-robin 0 [prio=50][active] \_ 0:0:1:7 sdd 8:48 [active][ready] \_ round-robin 0 [prio=10][enabled] \_ 0:0:2:7 sdh 8:112 [active][ready] . . [snip other HSV200 paths - all similar] multipath -ll -v 3 includes explicit statements that defaults are being used for the HSV400 (long output snipped...) sdaa: path checker = readsector0 (config file default) versus sda: path checker = tur (controller setting) sdx: getprio = NULL (internal default) versus sdd: getprio = /sbin/mpath_prio_alua %n (controller setting) - furthermore we see in the log file messages from both readsector0 *and* tur rather than just tur if the correct settings were used , which also backs that up. My questions are basically - why is it happening , and how to fix it ? The vendor and product regexps definitely do match both "HSP" and both "HSV200" and "HSV400" respectively so it doesn't seem that fiddling with the patterns will work , and I'm sure this config has been tested. Its not due to this server having to deal with two controllers - we have a second server that only mounts from the HSV400, and its multipath settings appear to be entirely the defaults, and not what we have set. (And conversely, its not due to the conf file not being read at all - since the server with two controllers is using the correct config for one of them , but not the other.) thanks for any tips and I will summarise. Cheers AMcC ======================================================================= Attention: The information contained in this message and/or attachments from AgResearch Limited is intended only for the persons or entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipients is prohibited by AgResearch Limited. If you have received this message in error, please notify the sender immediately. =======================================================================

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mounting images created using dd that contain two partitions
by Devraj Mukherjee 27 Sep '09

27 Sep '09

Hi all, I am trying to mount images that I previously created with dd and the images have two partitions (swap and LVM). I use these images to house data for my Xen Guests. For some reason (possibly Kernel conflicts for paravirtualized domains) I am unable to boot my Guest images. Failing which I would like to mount the disk images and atleast get my data out of them. dd -o loop server.img /media/diskimage asks me to provide a file system. How can I mount these images? I have been Googling around for this and have failed to find and answer, can someone please point me in the right direction. Appreciate your time. -- "The secret impresses no-one, the trick you use it for is everything" - Alfred Borden (The Prestiege)

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RPMforge.net down
by Hugh E Cruickshank 27 Sep '09

27 Sep '09

Hi All: It appears that the RPMforge.net site is down. Can someone confirm and possibly advise when it might be expected back? TIA Regards, Hugh -- Hugh E Cruickshank, Forward Software, www.forward-software.com

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CentOS-announce Digest, Vol 55, Issue 10
by centos-announce-request＠centos.org 26 Sep '09

26 Sep '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-2009:1463 Moderate CentOS 4 i386 newt Update (Johnny Hughes) 2. CESA-2009:1463 Moderate CentOS 4 x86_64 newt Update (Johnny Hughes) 3. CESA-2009:1459 Important CentOS 4 i386 cyrus-imapd Update (Johnny Hughes) 4. CESA-2009:1459 Important CentOS 4 x86_64 cyrus-imapd Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Fri, 25 Sep 2009 19:27:12 -0500 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2009:1463 Moderate CentOS 4 i386 newt Update To: CentOS-Announce <centos-announce(a)centos.org> Message-ID: <4ABD5FE0.5070805(a)centos.org> Content-Type: text/plain; charset="iso-8859-1" CentOS Errata and Security Advisory 2009:1463 Moderate Upstream details at : http://rhn.redhat.com/errata/RHSA-2009-1463.html The following updated files have been uploaded and are currently syncing to the mirrors: Source: newt-0.51.6-10.el4_8.1.src.rpm i386: newt-0.51.6-10.el4_8.1.i386.rpm newt-devel-0.51.6-10.el4_8.1.i386.rpm

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Inquiry:Problem in mounting external cdrom
by hadi motamedi 26 Sep '09

26 Sep '09

Dear All I tried to mount an external cdrom on my CentOS 5 server but un-successful . I attached the device to my USB port and then the followings have been added to my /dev folder : "cdrom -> scd0 cdrom-sr0 -> scd0 cdrw -> scd0 cdrw-sr0 -> scd0 cdwriter -> scd0 cdwriter-sr0 -> scd0" To this end , I tried to mount it as the followings (but it didn't get through) : #mount -t vfat /dev/cdrom-sr0 /mnt/cdrom Add the following line to /etc/fstab : /dev/cdrom-sr0 /mnt/cdrom vfat noauto,users,noexec,rw, uid=1000,gid=1000 0 0 #mount /mnt/cdrom Can you please do me favor and correct me for my mistakes in mounting it ? Thank you in advance

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samba file locking
by janezkosmr 26 Sep '09

26 Sep '09

Hi, I encountered an interesting problem. We have a Java application on a samba server. The folder is then shared to the clients via a samba share. So far it works OK. Until now we had windows clients and everything worked OK. But now we are trying to Linux clients and this is where the fun starts. When a developer copies a new jar to the folder which is shared via samba. And if this copying is done by scp strange things start happening. After a few clicks the application stops working returning NoClassDeffFound, even if the file is there and readable. After that it is not enough to just stop the application, you have to unmount an then mount the share. I tried turning off oplocks in the samba configuration as suggested in the samba how-to, but it doesn't fix the problem. Has anyone seen a similar error? BR

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Re: [CentOS] Centos 5.3 - kickstart configuration
by Karl Kobata 25 Sep '09

25 Sep '09

> Karl Kobata wrote: > > Can anyone tell me if this can be done? If it can, please give me > > instructions? > rpm -qa > or perhaps > rpm -qa --queryformat "%{NAME}\n" Can I take this formatted output and add it into the %packages section of my new kickstart file? I am assuming that using the kickstart GUI, the @development-tools for instance, added to the %packages section will load all packages grouped as "development-tools". > > Finally, where on the installation cd's would I place this kickstart file ? > Usually put it on a network share or floppy disk, access it via > HTTP or NFS or something. Since I do not have a floppy, only a cdrom drive, is adding to a network share or http or nfs be for upgrading? If for upgrading, how is the kickstart file launched? If I am installing from "bare metal", can I add this kickstart file to the install CD? If so where will I place this file? nate thanks very much. karl

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Storing Kerberos database in OpenLDAP
by Dan Burkland 25 Sep '09

25 Sep '09

Hi all, I have created a project for myself in that I would like to store an MIT Kerberos database inside LDAP (Using OpenLDAP). I have found some relevant results but most of them are extremely outdated and unreliable. I did however recently find an article for Ubuntu that was up to date however it wasn't focused on CentOS/Red hat-based distros. Has anybody found something like this https://help.ubuntu.com/9.04/serverguide/C/kerberos-ldap.html in regards to the topic discussed earlier? Thank you, Dan Burkland

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how to implement java in firefox ?
by MOKRANI Rachid 25 Sep '09

25 Sep '09

Hi, I have some pb for running java on my system with Firefox 3.0.12 System centos 5.3 - kernel 2.6.18-128 x86_64 When I tested my java config on http://www.java.com/en/download/installed.jsp?detect=jre&try=1 I have always the message that plugin missed : Java Runtime Environnemtn is not present. What I need to do for implemented full java in firefox ? Regards. Rachid Mokrani - http://www.ifp.fr <http://www.ifp.fr/> P avant d'imprimer, pensez à l'environnement before printing, think of environment __________________________ Ce message (et toutes ses pièces jointes éventuelles) est confidentiel et établi à l'intention exclusive de ses destinataires. Toute utilisation de ce message non conforme à sa destination, toute diffusion ou toute publication, totale ou partielle, est interdite, sauf autorisation expresse. L'IFP décline toute responsabilité au titre de ce message. This message and any attachments (the message) are confidential and intended solely for the addressees. Any unauthorised use or dissemination is prohibited. IFP should not be liable for this message. Visitez notre site Web / Visit our web site : http://www.ifp.fr __________________________

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Discuss September 2009