Difference between revisions of "Xen"

Revision as of 09:53, 6 March 2009

Xen is an open-source virtual machine server to be run on Linux. At Maretec we recently took a course on Xen and have installed a quad-core Opteron machine with 20GB RAM and a nearly 2TB RAID 5 storage volume.

Maretec Xen server machine

Hardware

Quad-core Opteron AMD with 20GB ram and 2 TB RAID5 Physical Volume composed by 4x750GB enterprise-graded hard-drives,
Suse Enterprise Server v10.2 with Xen Hypervisor installed,
Network address at 192.168.20.125.
RAID 5 of 1.97TB with no hot-swap disk available.
Bridging: eth2<->192.168.20.125; eth1<->DMZ; eth0<->LAN;

Maretec Xen domains

Einstein: a windows server 2003 web-pages server on the DMZ.
Copernico: a windows server 2003 database server on the LAN.
VmMrtSrv06: A dedicated OpenDAP/Thredds server on the DMZ.

Accessing via VNC

Install <goto>TightVNC client</goto>.

External references

Xen homepage

@@ Line 1: / Line 1: @@
 [[Xen]] is an open-source virtual machine server to be run on Linux. At Maretec we recently took a [[Xen workshop|course on Xen]] and have installed a quad-core Opteron machine with 20GB RAM and a nearly 2TB RAID 5 storage volume.
-==Maretec xen admin quick start==
-===Quick check on VM machines, and start them if needed===
-* Download [http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe putty],
-* Connect, using putty, to host '''192.168.20.125''' on port '''22''' as user '''maretec'''; use the admin password.
-* Once in, perform the following command to check which machines are running and which are down:
- > sudo /usr/sbin/xm list
- Name                                        ID   Mem VCPUs      State   Time(s)
- Domain-0                                     0  2048     2     r-----  20156.6
- VMMRTSRV02                                   2  1024     2     -b----  75002.4
- VMMRTSRV04                                   3  1024     2     -b----   3830.1
- VMMRTSRV05                                   6  1024     2     -b----   2433.5
- VMMRTSRV06                                   4  1024     2     -b----   6656.9
-* The machines with the second ''state'' set to ''b'' are running for the amount of ''time'' indicated in seconds.
-* The machines with the second ''state'' set to ''-'' aren't running. To start them using the following command for each machine:
- > sudo /usr/sbin/xm start VMMRTSRV0[2-6]
-===Useful stuff to know===
-;How to start a VM? :  > sudo /usr/sbin/xm start VMMRTSRV0[2-6]
-;How to reboot a VM? :  > sudo /usr/sbin/xm reboot VMMRTSRV0[2-6]
-;How to shutdown a VM? :  > sudo /usr/sbin/xm shutdown VMMRTSRV0[2-6]
-;How to list installed VMs? :  > sudo /usr/sbin/xm list
-;How do I know which ''sudo'' commands are available to me? :  > sudo -l
-;How do I know which commands are available with ''xm''? :  > sudo /usr/sbin/xm -l
 ==Maretec Xen server machine==
@@ Line 37: / Line 12: @@
 ===Maretec Xen domains===
-; VMMRTSRV0[4,5]: a windows server 2003 web-pages server on the DMZ. Domain name is '''einstein.maretec.ist.utl.pt''', IP is '''192.168.21.10'''.
+; Einstein: a windows server 2003 web-pages server on the DMZ.
-; VMMRTSRV0[4,5]: a windows server 2003 database server on the LAN. Domain name is '''copernico.maretec.ist.utl.pt''', IP is '''192.168.20.10'''.
+; Copernico: a windows server 2003 database server on the LAN.
-; [[VmMrtSrv06|VMMRTSRV06]]: A dedicated [[OpenDAP]]/[[Thredds]] server on the DMZ. Domain name is '''opendap.mohid.com''', IP is '''192.168.21.20''' and VNC console access is '''192.168.20.125:3'''.
+; [[VmMrtSrv06]]: A dedicated [[OpenDAP]]/[[Thredds]] server on the DMZ.
 ==Accessing via VNC==
 *Install <goto>TightVNC client</goto>.
-*Then access to '''192.168.20.125:?''' to have console access. You need to determine which port('''?''') is allocated to the VM. You can test values ranging from [1-9], or you can check the ''xen_config'' directory in the '''192.168.20.125''' machine (access it with [[ssh]] or putty).
 ==External references==

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