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Need kernel-debuginfo-2.6.9-67.0.20.EL.x86_64.rpm
by Jerry Amundson 15 Jul '08

15 Jul '08

Short story: Would it be possible to get kernel-debuginfo-2.6.9-67.0.20.EL.x86_64.rpm on di.c.o? I have a need to run crash on a 2.6.9-67.0.20.ELxenU xm dump-core. Long story: Two Dell 6950 (now called R905, 4 Dual-Core AMD Opteron 8200 series) heartbeat/drbd nodes running the stock CentOS 5.2 Dom0. The domU's are the only resources in heartbeat. Dom1 is a perfectly running, updated, CentOS 5.2 Apache/MySQL/Samba server (2.6.18-92.1.6.el5xen). It's xen config: name = "guinan" bootloader = "/usr/bin/pygrub" uuid = "8fa0ac9e-fe28-17f5-6a72-07f84b4daa24" memory = 4097 vcpus = 6 on_poweroff = "destroy" on_reboot = "restart" on_crash = "restart" vfb = [ "type=vnc,vncunused=1,keymap=en-us" ] disk = [ "phy:/dev/drbd1,xvda,w", "phy:/dev/drbd2,xvdb,w" ] vif = [ "mac=00:16:3e:68:16:5d,bridge=xenbr0", "bridge=xenbr1" ] Dom2 is a CentOS 4.6 software development and database server (2.6.9-67.0.20.ELxenU). Every so often, could be several hours or several days, it just hangs, locks up, becomes unresponsive. Nothing to the console. Nothing logged. When it gets to this point, the only recourse is an xm destroy. It's occurred with every combination of Dom0/DomU. The hardware of both servers checks out OK. The only sign of life, on Dom2's current Dom0, xentop shows CPU usage, and at a high percent, at that: xentop - 12:02:36 Xen 3.1.2-92.1.6.el5 2 domains: 2 running, 0 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown Mem: 16775712k total, 11629904k used, 5145808k free CPUs: 8 @ 2194MHz NAME STATE CPU(sec) CPU(%) MEM(k) MEM(%) MAXMEM(k) MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS VBD_OO VBD_RD VBD_WR SSID Domain-0 -----r 50891 1.5 901352 5.4 no limit n/a 8 4 17720114 18765713 0 0 0 0 0 monolith -----r 965342 599.2 10486632 62.5 10486784 62.5 6 2 332672635 30178285 2 0 15805538 60805435 0 I've experimented with various xen config's. Currently it's this: name = "monolith" uuid = "283746fa-c708-cfa0-f5df-cad6abea568e" memory = 10241 vcpus = 4 bootloader = "/usr/bin/pygrub" on_poweroff = "destroy" on_reboot = "restart" on_crash = "restart" vfb = [ "type=vnc,vncunused=1,keymap=en-us" ] disk = [ "phy:/dev/drbd3,xvda,w", "phy:/dev/drbd4,xvdb,w" ] vif = [ "mac=00:16:3e:08:8d:c3,bridge=xenbr0", "bridge=xenbr1" ] Previously, I'd tried adjusting memory, but the problem resurfaced. Currently, I've gone from 6 vcpus to the 4 shown above in the hopes that stabilizes it. I'm at wits end. I've committed these machines to production status, so this instability has everyone kind of on edge, and wanting to go back to bare metal... jerry -- "Your life is trite and jaded, boring and confiscated." - Twisted Sister

3 3

Any news about next kvm release for centos 5.2?
by carlopmart 11 Jul '08

11 Jul '08

Hi all, Which will be next stable release for CentOS 5.2?? Can i use on a production enviromment?? Thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

3 2

VMWare - 5.2 Update - Kernel Best Practices
by John Thomas 30 Jun '08

30 Jun '08

Thanks for all the great stuff. Executive Summary: Kernel Parameters or Special Kernel for 5.2 on VMWare? More Details: Is it the best practice to use the specially compiled kernels (when available, typically here: http://people.centos.org/~tru/kernel-vm/5/RPMS/i386/ ) or are kernel parameters now able to achieve the same thing? This bug report: http://bugs.centos.org/view.php?id=2189 seems to suggest clocksource=pit and divider=10 will crash kernels and I did not see "it's fixed" in the release notes. Thanks again! -- Sincerely, John Thomas

5 8

New open-vm-tools available
by Johnny Hughes 30 Jun '08

30 Jun '08

I have created new versions of open-vm-tools for centos-4 and centos-5: http://people.centos.org/hughesjr/open-vm-tools/ Thanks, Johnny Hughes

2 1

can I setup KVM on latest Centos 5.2 and where can I find the guide??
by rolandsun sun 29 Jun '08

29 Jun '08

2 1

gnome desktop XDMCP in domU
by David Hláčik 28 Jun '08

28 Jun '08

Hello, i have CentOS on xen as domU, i have installed "yum groupinstall Gnome Desktop ... " . I want to access Gnome Desktoup through XDMCP protocol, but unfortunately X server will not start when there is no graphical output where to start. How can i solve this problem? And of course i have edited gdm.conf and added to [XDMCP] Enable = True. Thanks in advance! David

2 1

updating to 5.2 with Xen 3.2 installed
by Kai Schaetzl 26 Jun '08

26 Jun '08

Has someone already upgraded a machine with the Xen 3.2 packages from http://www.xen.org/download/dl_32rhel5.html to CentOS 5.2? Problems? Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com

1 0

kvm under centos5.1/5.2
by carlopmart 20 Jun '08

20 Jun '08

Hi all, Somebody have tried kvm under centos 5/5.1/5.2?? How stable and usable is it?? Any tip?? After redhat news about support kvm in the future I think that software will be more releveant in virtulized environments. Thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

3 4

Migration from Windows VMs from VMWare server to Xen
by Stephen 05 Jun '08

05 Jun '08

Hi everyone, Does anyone know how to migrate virtual machines from VMWare server to Centos Xen VMs? If someone has some hints or a helpful blog they know of, that would be great. Thank you Stephen

2 4

unable to access xen guest's console
by a s p a s i a 04 Jun '08

04 Jun '08

Hello all, I am new to Xen; I followed a few techtips/technotes from How2forge and other linux sites to walk me through configuring the following: - proper installation of xen kernel on a CentOS 5.1 server - booting into the xen kernel and checking the Dom0 (all is fine): [root@dataserv3 /]# xm list Name ID Mem(MiB) VCPUs State Time(s) Domain-0 0 1737 2 r----- 1155.0 - Next instructions that attempt to walk me through installing my first guest OS via "virt-install" and/or "virtual manager" - both allowed me to get to the point of where the guest DomU is created ... and it's at 12%; the CLI install process tells me to access the console - but I am unable to console into the new guest DomU. xm list now shows: -------------------- xm list Name ID Mem(MiB) VCPUs State Time(s) Domain-0 0 1737 2 r----- 1155.0 centos50 2 255 1 ------ 0.0 xm console centos50 gives me an error: xm console centos50 xenconsole: Could not read tty from store: No such file or directory While running the Virtual Machine Mgr GUI - when I click on my guest DomU - its console window appears gray with a message "The console is currently unavailable". Questions: 1. Is there a link or some paper that I may have missed that outlines potential issues in configuring Xen guest machines using virt-install and/or Virtual Machine Mgr? 2. Any thoughts as to what steps or packages did I miss so that I am not getting a console? thanks in advance. - aspasia. -- A S P A S I A . . . . . . . . . . ..

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