Re: [CentOS] RedHat to CentOS packages
How do you use nagios to cve monitoring? Is there plugin available for that? We're ussing OSSIM, as it integrates Nagios and Nessus. My guess is that you could probably write a Nagios plugin to query Nessus but we haven't needed to look into that yet ;) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] RedHat to CentOS packages
Dear all, We're trying to use Nessus to monitor our system and we're having a hard time mapping the package versions from RedHat to CentOS in order to be able to report against CVE (vulnerability reports). After some research, we think that the mapping is as follows (using HTTPD as the example): CentOS httd-2.2.3-43.el5.centos.3 is equivalent to RedHat httpd-2.2.3-43.el5_5.3 So, it looks like CentOS replaces _$MINOR_RELEASE (in this case _5) with .centos . Is this a fair assumption or are there other rules we are missing? Is this documented anywhere? Thanks Gabriel Tabares ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to strip out the title bar from xterm windows on CentOS 5 GNOME?
Hi. Running CentOS 5 with the default GNOME desktop. Is it possible to configure xterm windows not to have title bars to get the most out of the available screenspace? I don't know how to do it with Gnome but, with KDE 3, you can set up a shortcut to remove the window decorations on a per-window basis. Found a reference to Compiz but the version available through CentOS seems old (0.0.13 compared to the current around 0.8 or 0.9) and having a double zero version number, I was afraid to use it. If I remember correctly, Compiz was quite unstable at that time, but I may be wrong :) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] OT: programming language for morons (newbie friendly language in Open Source world)
Hi folks I have more than 12 years experience with UNIX system administration, but I am too stupid for programming. My only programming experience is shell scripting. I tried to learn Java, but don't understand it because it is too complicated for my limited brainpower. What programming language should I learn? First of all, what's the reason you want to learn to program? For the enjoyment of it? To be able to write more complex admin tools? To create front-end applications? If you already know shell scripting, Perl should be easy for you, as the syntax is similar (a hybrid of Shell, awk and C, if I remember correctly) and is very easy to learn. It also is installed on every Unix I've used in the last decade and has an extremely large repository of libraries, CPAN, which covers everything you may need and more (writing Perl in latin, really?). On the other hand, the OO syntax is awkward, to say the least, and reading other people's code can be difficult sometimes, as there is more than one way to it. Python is quite simple. The syntax is quite alien, compared to most C-based languages, but it seems to be simple and straightforward for most people. It also is included with most modern Unix-like OS. Both, Python and Perl are widely used in CentOS, so you should be able to open a tool and see how it works. PHP can also be useful and it's easy to learn, but it is mostly oriented towards web development so, unless that is the way you want to go, I would ignore it. It also tends to be a bit of a mess, API wise. Ruby is another language that seems to be gaining a lot of traction but I just can't stand the syntax, and that comes from someone who used to be a Perl developer. It also seems to be less in use as a systems language, as opposed to a web development language with Ruby on Rails. C can be a good language if you want to start from the bottom, learn how to use pointers, to manage memory without help and to be able to write low-level stuff. The syntax is extremely simple, but it's a difficult language to master, as it is quite low-level, compared to other languages. If you didn't get Java, I would stay well away from C# (it's mostly a Java clone, despite the fact that it now seems to have a nicer syntax a a few extra bits that Java misses) and C++ (far too complex... it does everything you may want to do but that power comes at the cost of simplicity). My personal preference would be to go for Python. While the issue with meaningful whitespace can be REALLY annoying, especially if you copy and paste from a terminal (tabs will get converted to spaces and Python doesn't like mixed tabs/spaces, indentation is meaningful), the language itself is quite clean and straightforward, there are plenty of books and tutorials online and, if you're desperate, most sysadmins seem to be picking it up as part of their arsenal these days. Even if you don't end up using Python as your main language, I see it as a very good way of learning to program. Whatever you choose, good luck and let us know what you decide. Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] upgrading Centos-Xen when version 6 comes along
Also, if you assign MACs to your VMs at installation time (I do, for DHCP- and DNS-related reasons), you should note that KVM MACs lives in a different namespace: 54:52:00:xx:xx:xx. You can change the allocated MAC address by editing the files in /etc/libvirt/qemu . Edit the mac address='54:52:00:19:f2:ef'/ section and you're all set. I am not sure if you need to restart libvirtd after making the changes, as I have not got a machine I can test that at the moment. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] upgrading Centos-Xen when version 6 comes along
The biggest single up-front difference for me on CentOS machines was that KVM hosts default to NAT on a private bridge while Xen hosts default to straight bridging. Some network tweaks are necessary to get KVM hosts to live on a straight bridge. Sorry, I forgot to add to this before. If you want to use bridging in KVM you need to set up bridge interfaces on the host (br0 and so on) and assign the main IP address to that interface, instead of to the underlying physical one. One more thing, if you assign a bridge to a VLAN interface, you do not need to add the VLAN on the guest, just treat it as a normal interface and the guest will take care of the tagging for you. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] good shell script examples?
On 15/11/2010 18:47, Kill Script wrote: I am looking for a beginner guide to shell scripting simple tasks on CentOS (e.g. ssh'ing into a server / router / switch, checking for certain things, then exiting and going to the next IP). If you don't want to use ssh keys, you will have to write scripts that interact with prompts, so you'll probably be looking at Expect, Python (pexpect or paramiko) or Perl. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] xServes are dead ;-( / SAN Question
I tought of that, and I will be needing something like this, since I have some services that need to be restarted in the event of them dying or being killed. But I'm not that much confortable scripting a modification of the initab to activate / deactivate services on a server-by-server basis. Have a look at monit. We are using it for restarting critical services (heartbeat, postfix, apache) if they fail and it has been simple to set up and stable. The most useful thing is that it emails you whenever the PID of the process changes or it has to restart it. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RPM/YUM on CentOS 5.4 issue - multiple versions of the same package installed
On 11/11/2010 13:47, Gabriel Tabares wrote: Hi all, We currently have an issue with multiple versions of a custom package being installed. The RPM contains a liquibase script (a Java-based DB change management tool) and a %post script to run liquibase. We are installing with scripts that run yum update liquibase-script. If the %post script runs correctly, it returns 0 and the application gets installed correctly but, if the %post script fails, it returns -1 and the application does get installed, but the old one does not get unistalled, so if I run rpm -qa | grep liquibase-script I get a list of all the versions that have been installed. I know that the files have been installed correctly, as the RPM contents have the same name but different content and I have checked it. Why is this happening? I thought that %post scripts failing do not prevent the application to installing and that RPM installation is atomic, so installing one package will remove the previous verison. Is there any way to prevent this issue? We're using CentOS 5.4 on x86_64 Any suggestion, guys? Thanks Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] updating to gtk+ = 2.0
In that case: yum install gtk2 gtk2-devel Funny thing is those are already installed. However I require a later version of gtk+. I'm attempting to compile from source. CentOS comes with an old version of GTK 2. Most application these days require a later version of the library, so you have two realistic options: * Compile GTK from source and install it out of the standard library path, then specify the include paths for compiling and use LD_LIBRARY_PATH before running the application. * Use another Linux distritbution or wait for CentOS 6 There's another option that is not guaranteed to work, copy all the libraries you need from another Linux distribution (Fedora?) into a directory, use LD_LIBRARY_PATH and pray that it works with CentOS, but I would not place much trust on this option. I would personally go for the latter option as compiling a new version of GTK and its dependencies is not for the faint of heart, specially for something as obsolete (by choice) as CentOS. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] RPM/YUM on CentOS 5.4 issue - multiple versions of the same package installed
Hi all, We currently have an issue with multiple versions of a custom package being installed. The RPM contains a liquibase script (a Java-based DB change management tool) and a %post script to run liquibase. We are installing with scripts that run yum update liquibase-script. If the %post script runs correctly, it returns 0 and the application gets installed correctly but, if the %post script fails, it returns -1 and the application does get installed, but the old one does not get unistalled, so if I run rpm -qa | grep liquibase-script I get a list of all the versions that have been installed. I know that the files have been installed correctly, as the RPM contents have the same name but different content and I have checked it. Why is this happening? I thought that %post scripts failing do not prevent the application to installing and that RPM installation is atomic, so installing one package will remove the previous verison. Is there any way to prevent this issue? We're using CentOS 5.4 on x86_64 Thanks Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Network cards not recognised
On 12/09/2010 14:54, Mogens Kjaer wrote: On 09/11/2010 05:04 PM, Gabriel Tabares wrote: ... Unluckily, I have no physical access to the machine, so removing cards is not an option. Do you have iLO access to the machine? Then you should be able to disable the cards in the BIOS. The cards were faulty. HP have shipped us a replacement motherboard as all the cards are on-board. Thanks for your help! Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Network cards not recognised
Hi, We have a HP DL385 G6 server that is having an issue. Two of the 4 network cards are not being recognised by Linux. We have quite a few other servers with the same hardware and no issues but, before I call HP, I would like to make sure that I am not doing anything wrong :) I have tried with the kernel that came with CentOS 5.5 and the updated one kernel-2.6.18-194.11.3. I do an lspci and they're all there: lspci | grep Eth 03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20) 03:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20) 41:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet 41:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet ifconfig -a ... eth0 Link encap:Ethernet HWaddr D8:D3:85:A7:E4:24 UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1 RX packets:185 errors:0 dropped:0 overruns:0 frame:0 TX packets:111 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:16394 (16.0 KiB) TX bytes:18384 (17.9 KiB) Interrupt:217 Memory:fa00-fa012800 eth1 Link encap:Ethernet HWaddr D8:D3:85:A7:E4:26 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Interrupt:209 Memory:f800-f8012800 (no more ethX) ... ethtool eth2 Settings for eth2: Cannot get device settings: No such device Cannot get wake-on-lan settings: No such device Cannot get message level: No such device Cannot get link status: No such device No data available If I do a search on /var/log/messages, all I get is the following Sep 11 11:38:18 gs-prod-dwh01 kernel: bonding: bond1: Unable to set eth2 as primary slave as it is not a slave. (the cards are set as two bonds, bond0 with eth0, eth1 and bond1 with eth2, eth3): lsmod shows that the bnx2 driver is loaded: lsmod | grep bnx bnx2 216653 0 /etc/modprobe.conf includes the following: alias eth0 bnx2 alias eth1 bnx2 alias eth2 bnx2 alias eth3 bnx2 I have also tried to set eth2 and eth3 to use the bnx2x in /etc/modprobe.conf, but all to no avail. Any suggestions? Thanks Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Network cards not recognised
On 11/09/2010 15:52, Larry Vaden wrote: On Sat, Sep 11, 2010 at 9:37 AM, Gabriel Tabares gabriel.taba...@roboreus.com wrote: Hi, We have a HP DL385 G6 server that is having an issue. Two of the 4 network cards are not being recognised by Linux. We have quite a few other servers with the same hardware and no issues but, before I call HP, I would like to make sure that I am not doing anything wrong :) I have tried with the kernel that came with CentOS 5.5 and the updated one kernel-2.6.18-194.11.3. I do an lspci and they're all there: lspci | grep Eth 03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20) 03:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20) 41:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet 41:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet Notice that two of the cards are Rev 20, two are not. Look at each card to determine the Rev level of each card. Then populate the machine with only the Rev 20 cards and see if you get what you would expect. Then populate the machine with only the non-Rev 20 cards and see if you get what you would expect. Unluckily, I have no physical access to the machine, so removing cards is not an option. There are a number of articles found by Google that indicate you may need to upgrade BIOS or use a later version of the driver. I have already upgraded the firmware to the latest. I will look for updated drivers for the cards. Thanks ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Wrapper package / yum repository
On 07/09/2010 17:47, Steve Huff wrote: On Sep 7, 2010, at 11:28 AM, Gabriel Tabares wrote: tomcat-6.0.26-1.13 adm-app-conf-18-2010.09.01 jdk-1.6.0_20-2.0 ant-1.8.1-1 there's your problem. in the specfile, these dependencies should be specified as: Requires: tomcat= 6.0.26 Requires: adm-app-conf= 18 ... relevant API documentation is here: http://rpm5.org/docs/api/dependencies.html Thanks, that fixed it. I never read the documentation and was fooled by the fact that it listed the rpms with the right version number. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Wrapper package / yum repository
Hi, I am setting up a yum repository for our applications and I am having a bit of trouble. I copy the files to a webserver, run createrepo and then configure the servers to use it. One of the RPMs is a release package that includes exact versions of all the binary and configuration files as dependencies so we can do packaged releases and, if we want to revert to a previous version, we can force it by installing this package (and the yum-downgrade plugin). The issue I am having is that RPM/yum seems to be unable to correctly resolve the dependencies: If I do yum install adm-release I get errors about lots of missing dependencies. EG: [r...@host01 yum.repos.d]# yum install adm-release Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Setting up Install Process Resolving Dependencies -- Running transaction check --- Package adm-release.noarch 0:1-1 set to be updated -- Processing Dependency: adm-app-conf-18-2010.09.01 for package: adm-release -- Processing Dependency: ant-1.8.1-1 for package: adm-release -- Processing Dependency: jdk-1.6.0_20-2.0 for package: adm-release -- Finished Dependency Resolution adm-release-1-1.noarch from myrepo has depsolving problems -- Missing Dependency: jdk-1.6.0_20-2.0 is needed by package adm-release-1-1.noarch (myrepo) adm-release-1-1.noarch from myrepo has depsolving problems -- Missing Dependency: adm-app-conf-18-2010.09.01 is needed by package adm-release-1-1.noarch (myrepo) adm-release-1-1.noarch from myrepo has depsolving problems -- Missing Dependency: ant-1.8.1-1 is needed by package adm-release-1-1.noarch (myrepo) adm-release-1-1.noarch from myrepo has depsolving problems -- Missing Dependency: geosweep-libquantis-0.1.0-1.1 is needed by package adm-release-1-1.noarch (myrepo) Error: Missing Dependency: ant-1.8.1-1 is needed by package adm-release-1-1.noarch (myrepo) Error: Missing Dependency: jdk-1.6.0_20-2.0 is needed by package adm-release-1-1.noarch (myrepo) Error: Missing Dependency: adm-app-conf-18-2010.09.01 is needed by package adm-release-1-1.noarch (myrepo) You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest If I try to install some of the packages on its own, they work just fine: # yum install ant-1.8.1-1 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Setting up Install Process Resolving Dependencies -- Running transaction check --- Package ant.noarch 0:1.8.1-1 set to be updated -- Finished Dependency Resolution Dependencies Resolved == Package Arch Version Repository Size == Installing: ant noarch 1.8.1-1 myrepo 2.2 M Transaction Summary == Install 1 Package(s) Upgrade 0 Package(s) Total download size: 2.2 M And, even worse, some of the packages are already installed: # yum install jdk-1.6.0_20-2.0 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Setting up Install Process Package jdk-1.6.0_20-2.0.x86_64 already installed and latest version Nothing to do Any ideas? I am quite baffled and would like to get this to work as soon as possible. Thanks Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Wrapper package / yum repository
On 07/09/2010 15:55, Steve Huff wrote: rpm -qp --requires tomcat-6.0.26-1.13 adm-app-conf-18-2010.09.01 jdk-1.6.0_20-2.0 ant-1.8.1-1 /bin/sh /bin/sh /bin/sh rpmlib(PayloadFilesHavePrefix) = 4.0-1 rpmlib(CompressedFileNames) = 3.0.4-1 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Update to base release
On 07/09/2010 16:22, John Kennedy wrote: Hello All, We have some machines running CentOS 4 Update 4 (4.4). We want to update these boxes to the stock CentOS 4 Update 8 (4.8). We have the 4.8 iso images. Is it possible to use up2date and have it use the 4.8 mounted iso images on a remote (install) server as the repository? The ISO's are accessible through http. These servers are remote with no CD/DVD option to upgrade The best way I can think of is to create a yum repository with the RPMs from the 4.8 image on the source server then create yum.repo file on the destination files and then do a yum update. There are lots of instructions online how to do it, do a search for centos create yum repo iso or something similar and you will get lots of hits. Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] ip aliasing on bonded interface possible?
On 05/09/2010 18:33, Robert Arkiletian wrote: Has anyone successfully created a bonded interface (bond0) with say two nics AND also then aliased that interface to get bond0 and bond0:1 (for an alias ip) I just want to know if it's possible and reliable Possible and seems to be quite stable. Heartbeat does exactly this for the shared IP and we haven't had any problems whatsoever since we set it up. Thanks ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] bridge
On 03/09/2010 10:41, mattias wrote: I try to use a bridge with openvz but get the following Bridging Support is not available in this kernel This message are in all kernels i tryed from the centos yum repo On a frech 5.5 It has worked before With the same install i have used Can you try to run modprobe bridge before you start networking? I have seen that error before, I just can't remember how I fixed it. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] bridge
On 03/09/2010 10:59, mattias wrote: Ifcfg-eth1 # Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ DEVICE=eth1 HWADDR=00:50:FC:F9:84:CB ONBOOT=yes DHCP_HOSTNAME=vps.mjw.se BRIDGE=br0 Ifcfg-br0 [br0] ONBOOT=yes TYPE=Bridge BOOTPROTO=dhcp Can you try adding the following line to the ifcfg-br0 file? PHYSICAL=eth1 That seems to be the only difference I can find from our working config. -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Timo Schoeler Sent: Friday, September 03, 2010 11:54 AM To: CentOS mailing list Subject: Re: [CentOS] bridge In the host Could you post you appropriate ifcfg scripts? -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Timo Schoeler Sent: Friday, September 03, 2010 11:50 AM To: CentOS mailing list Subject: Re: [CentOS] bridge For example 2.6.18-194.8.1.el5.028stab070.4 This is the openvz kernel True. So, where do you place the bridge, in the VE or in the host itself? Timo -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Timo Schoeler Sent: Friday, September 03, 2010 11:43 AM To: CentOS mailing list Subject: Re: [CentOS] bridge I try to use a bridge with openvz but get the following Bridging Support is not available in this kernel This message are in all kernels i tryed from the centos yum repo On a frech 5.5 It has worked before With the same install i have used Hi, so, you installed a fresh CentOS 5.5 and then added the OpenVZ repo from their site? Which kernel did you try (of which you say it lacks bridge support)? Regards, Timo ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Automatically detecting LUNs without a reboot
On 01/09/2010 05:00, cpol...@surewest.net wrote: On Tue, Aug 31, 2010 at 04:48:01PM +0100, Gabriel Tabares wrote: From there, I went to http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/html/Online_Storage_Reconfiguration_Guide/rescan-scsi-bus.html Where it says : In order for |rescan-scsi-bus.sh| to work properly, |LUN0| must be the first mapped logical unit. The |rescan-scsi-bus.sh| can only detect the first mapped logical unit if it is |LUN0|. The |rescan-scsi-bus.sh| will not be able to scan any other logical unit unless it detects the first mapped logical unit even if you use the |--nooptscan| option. So I went to the array interface, deleted the volumes and tried re-creating a new volume with a LUN ID of 0, and I get the following error: Unable to create volume vd01_v001. LUN zero is reserved as the SCC/SES device on this host. (vd01_v001) - The LUN specified (0) must be in the range of 1 - 511. I can't create a LUN with ID 0, which means that rescan-scsi-bus.sh will not work, as per the above text. Any more suggestions? Thanks Gabriel rescan-scsi-bus is a shell script. It accepts this argument: --luns=LIST Scan only lun(s) in LIST so it may work for you after all? OK, let me do my best Homer Simpson impersonation. DUH That worked! How did I miss that? Thank you so very much! Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Automatically detecting LUNs without a reboot
Hi everybody. I have an HP StorageWorks array connected to one of my servers, connected via an LSI controller (lspci reports: SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08)) on an HP DL385 running CentOS 5.5 x86_64. I have set up multipath and all is working but, when I create a snaphost and export it as a new LUN from the HP web interface, it does not appear as a new disk. If I reboot, I get the LUN to appear as a new SCSI device (sd[a-z]). Is there any way I can force automatic detection? One of the reasons to use snapshots is to be able to back up the system without downtime, so not being able to detect the LUNs makes the whole set up a bit pointless. I have tried kudzu, the rescan-scsi-bus.sh script and everything else I have found online, with no luck. The LSI tools only seem to be available for i386, and I would like to avoid adding the 32bit environment, if I can. Any help would be greatly appreciated. Thanks, Gabriel Tabares ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Antwort: Automatically detecting LUNs without a reboot
On 31/08/2010 11:07, Andreas Reschke wrote: centos-boun...@centos.org wrote on 31.08.2010 11:43:50: Gabriel Tabares gabriel.taba...@roboreus.com Gesendet von: centos-boun...@centos.org 31.08.2010 11:44 Bitte antworten an CentOS mailing list centos@centos.org An CentOS mailing list centos@centos.org Kopie Thema [CentOS] Automatically detecting LUNs without a reboot Hi everybody. I have an HP StorageWorks array connected to one of my servers, connected via an LSI controller (lspci reports: SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08)) on an HP DL385 running CentOS 5.5 x86_64. I have set up multipath and all is working but, when I create a snaphost and export it as a new LUN from the HP web interface, it does not appear as a new disk. If I reboot, I get the LUN to appear as a new SCSI device (sd[a-z]). Is there any way I can force automatic detection? One of the reasons to use snapshots is to be able to back up the system without downtime, so not being able to detect the LUNs makes the whole set up a bit pointless. I have tried kudzu, the rescan-scsi-bus.sh script and everything else I have found online, with no luck. The LSI tools only seem to be available for i386, and I would like to avoid adding the 32bit environment, if I can. Any help would be greatly appreciated. Thanks, Gabriel Tabares ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Hi, I do a rescan (online) on multipath with echo - - - /sys/class/scsi_host/host0/scan echo - - - /sys/class/scsi_host/host1/scan echo - - - /sys/class/scsi_host/host2/scan echo - - - /sys/class/scsi_host/host3/scan echo - - - /sys/class/scsi_host/host4/scan echo - - - /sys/class/scsi_host/host5/scan echo - - - /sys/class/scsi_host/host6/scan depends on the amount of controllers. Tried that. I only have one controller: [r...@db02 ~]# cat /proc/partitions major minor #blocks name 104 0 292935982 cciss/c0d0 104 1 265217053 cciss/c0d0p1 104 22988090 cciss/c0d0p2 8 0 683593744 sda 8 1 683589816 sda1 816 683593744 sdb 817 683589816 sdb1 832 683593744 sdc 833 683589816 sdc1 [r...@db02 ~]# echo - - - /sys/class/scsi_host/host0/scan [r...@db02 ~]# cat /proc/partitions major minor #blocks name 104 0 292935982 cciss/c0d0 104 1 265217053 cciss/c0d0p1 104 22988090 cciss/c0d0p2 8 0 683593744 sda 8 1 683589816 sda1 816 683593744 sdb 817 683589816 sdb1 832 683593744 sdc 833 683589816 sdc1 Still not appearing at all. Gruß Andreas Reschke Unix/Linux-Administration andreas.resc...@behrgroup.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Automatically detecting LUNs without a reboot
On 31/08/2010 11:20, Alexander Dalloz wrote: Hi everybody. I have an HP StorageWorks array connected to one of my servers, connected via an LSI controller (lspci reports: SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08)) on an HP DL385 running CentOS 5.5 x86_64. I have set up multipath and all is working but, when I create a snaphost and export it as a new LUN from the HP web interface, it does not appear as a new disk. If I reboot, I get the LUN to appear as a new SCSI device (sd[a-z]). Is there any way I can force automatic detection? One of the reasons to use snapshots is to be able to back up the system without downtime, so not being able to detect the LUNs makes the whole set up a bit pointless. I have tried kudzu, the rescan-scsi-bus.sh script and everything else I have found online, with no luck. The LSI tools only seem to be available for i386, and I would like to avoid adding the 32bit environment, if I can. Any help would be greatly appreciated. Thanks, Gabriel Tabares rescan-scsi-bus.sh from sg3-utils should work. I am afraid that it doesn't: [r...@db02 ~]# cat /proc/partitions major minor #blocks name 104 0 292935982 cciss/c0d0 104 1 265217053 cciss/c0d0p1 104 22988090 cciss/c0d0p2 8 0 683593744 sda 8 1 683589816 sda1 816 683593744 sdb 817 683589816 sdb1 832 683593744 sdc 833 683589816 sdc1 [r...@db02 ~]# rescan-scsi-bus.sh Host adapter 0 (mptsas) found. Scanning SCSI subsystem for new devices Scanning host 0 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs Scanning for device 0 0 0 0 ... OLD: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: HP Model: MSA2312saRev: M110 Type: EnclosureANSI SCSI revision: 05 Scanning for device 0 0 0 1 ... OLD: Host: scsi0 Channel: 00 Id: 00 Lun: 01 Vendor: HP Model: MSA2312saRev: M110 Type: Direct-AccessANSI SCSI revision: 05 Scanning for device 0 0 0 2 ... OLD: Host: scsi0 Channel: 00 Id: 00 Lun: 02 Vendor: HP Model: MSA2312saRev: M110 Type: Direct-AccessANSI SCSI revision: 05 Scanning for device 0 0 1 0 ... OLD: Host: scsi0 Channel: 00 Id: 01 Lun: 00 Vendor: HP Model: MSA2312saRev: M110 Type: EnclosureANSI SCSI revision: 05 Scanning for device 0 0 1 1 ... OLD: Host: scsi0 Channel: 00 Id: 01 Lun: 01 Vendor: HP Model: MSA2312saRev: M110 Type: Direct-AccessANSI SCSI revision: 05 0 new device(s) found. 0 device(s) removed. [r...@db02 ~]# cat /proc/partitions major minor #blocks name 104 0 292935982 cciss/c0d0 104 1 265217053 cciss/c0d0p1 104 22988090 cciss/c0d0p2 8 0 683593744 sda 8 1 683589816 sda1 816 683593744 sdb 817 683589816 sdb1 832 683593744 sdc 833 683589816 sdc1 Please see http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/html/Online_Storage_Reconfiguration_Guide/scanning_for_new_devices.html. Tried that (it lists the same command that Andreas mentioned), no luck. We're not using FC, so the second part doesn't work. From there, I went to http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/html/Online_Storage_Reconfiguration_Guide/rescan-scsi-bus.html Where it says : In order for |rescan-scsi-bus.sh| to work properly, |LUN0| must be the first mapped logical unit. The |rescan-scsi-bus.sh| can only detect the first mapped logical unit if it is |LUN0|. The |rescan-scsi-bus.sh| will not be able to scan any other logical unit unless it detects the first mapped logical unit even if you use the |--nooptscan| option. So I went to the array interface, deleted the volumes and tried re-creating a new volume with a LUN ID of 0, and I get the following error: Unable to create volume vd01_v001. LUN zero is reserved as the SCC/SES device on this host. (vd01_v001) - The LUN specified (0) must be in the range of 1 - 511. I can't create a LUN with ID 0, which means that rescan-scsi-bus.sh will not work, as per the above text. Any more suggestions? Thanks Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Slow domain resolution problem - kind of resolved
Hi everyone, I am answering this here as I found a workaround. I could not solve the solution when using the Juniper as the DNS server, so I reverted to using bind and that fixed the issue. Thanks for the help, everybody. Regards, Gabriel I've just joine the list as I am having an issue with our CentOS servers. The domain resolution is extremely slow from the application but doing an nslookup gives an immediate response. All the applications have the same issue, as do all the servers. I have been looking for the solution all over the web and all I have found are references to disabling ipv6. - By setting enable_ipv6 = no in /etc/sysconfig/network, which is already done on all the machines. - By blacklisting the ip6 module, which is not an option as it is used by the bonding module. Just for the sake of it, I tried it and, as expected, the bonding module did not come back up. If bad comes to worse, I could set up host entries for the main machines in /etc/hosts, but I really am trying to avoid that. Any suggestions? Thanks Gabriel Tabares ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Slow domain resolution problem
On 25/08/2010 17:44, Rajagopal Swaminathan wrote: Greetings, On Wed, Aug 25, 2010 at 9:08 PM, Les Mikeselllesmikes...@gmail.com wrote: On 8/23/2010 10:08 AM, Gabriel Tabares wrote: Some servers do, some don't. Have you tried google's DNS servers 8.8.8.8 IP and one more IP I can't recollect exactly External DNS is not available as the servers are firewalled from the outside. When I open DNS access to the outside, the issue does not seem to appear. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Slow domain resolution problem
On 25/08/2010 14:39, m.r...@5-cent.us wrote: Gabriel Tabares wrote: On 23/08/2010 21:25, Keith Roberts wrote: On Mon, 23 Aug 2010, Gabriel Tabares wrote: From: Gabriel Tabaresgabriel.taba...@roboreus.com On 23/08/2010 13:28, Joseph L. Casale wrote: Both files are the default ones from CentOS: snip Keith, the issue happens resolving internal IP addresses. The servers do not have DNS access to the outside world, so using this would mean that nothing is resolved ;) Really dumb question: do you have nisplus or nis running? mark There's not such a thing as a dumb question! No, I do not have NIS or NIS+ running. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] cfengine vs. puppet
On 27/08/2010 19:11, Ski Dawg wrote: Stefano Sasso wrote: 2010/8/27 Ski Dawgcen...@skidawg.org: After spending a little bit of time searching around today, I have run across 2 that seem like good options, cfengine and puppet. Does anyone have any thoughts about either of these tools? Is there snip Here's another two cents: first part of last year, I was working with Spacewalk, the released version of RedHat's satellite. While I was fighting it tooth and nail, it went from 0.4 to 0.5. With that experience, I'd say *don't* bother about it Thanks to everyone for the replies, and the links to articles for further research. I will definitely continue reading those. At this time, we are not interested in Spacewalk because of the Oracle db requirement, but I will investigate the other options as well. Have you looked into bcfg2? Of all the options have looked into, it looks like the best for what I want. My experience with Spacewalk is that is not ready yet and that it takes too much effort to set it up. It will probably be worth it but I can't dedicate the time it would take to set it up. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Slow domain resolution problem
Not sure if it is RDNS. I had similar issues on Fedora, and for me it was to do with IP6. Konqueror web browser took ages to load a page. IIRC Firefox handled it OK. Try Googling for 'uninstalling ipv6 linux' I already tried that. The /etc/sysconfig/network has the IPV6_ENABLE=no. Disabling the ip6 modules is not feasible, as the bonding module depends on it. Another thing is how many DNS IP addresses do you have in /etc/resolv.conf? I don't have an ISP DNS, but the address of the internal DNS server, which has all the mappings for our domain. Thanks for your help, I'll keep on trying :) Regards, Gabriel ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Slow domain resolution problem
On 23/08/2010 21:25, Keith Roberts wrote: On Mon, 23 Aug 2010, Gabriel Tabares wrote: To: centos@centos.org From: Gabriel Tabaresgabriel.taba...@roboreus.com Subject: Re: [CentOS] Slow domain resolution problem On 23/08/2010 13:28, Joseph L. Casale wrote: Both files are the default ones from CentOS: So what do the host names look like that the application attempts to resolve, fully qualified or not? What does your cli based query look like? My resolv.conf is: search mydomain.com nameserver 10.3.2.2 The hostname of the machines is set to a FQDN server.mydomain.com. The time it takes for the queries does not change whether we use the FQDN or just the hostname. Try this in your /etc/reolv.conf # Eclipse ISP nameserver 212.104.130.9 nameserver 212.104.130.65 # OpenDNS nameserver 208.67.222.222 nameserver 208.67.220.220 Keith, the issue happens resolving internal IP addresses. The servers do not have DNS access to the outside world, so using this would mean that nothing is resolved ;) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
