Difference between revisions of "Xen"
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[[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. | [[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== | ==Maretec Xen server machine== | ||
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===Maretec Xen domains=== | ===Maretec Xen domains=== | ||
| − | ; [[VmMrtSrv06]]: A dedicated [[OpenDAP]]/[[Thredds]] server. | + | ; 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'''. |
| + | ; 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'''. | ||
| + | ; [[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'''. | ||
==Accessing via VNC== | ==Accessing via VNC== | ||
| − | *Install <goto>TightVNC client</goto> | + | *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== | ==External references== | ||
Revision as of 10:58, 5 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.
Contents
Maretec xen admin quick start
Quick check on VM machines, and start them if needed
- Download 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
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
- 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.
- 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.
- 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.
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).
