You can use virsh to manage xen virtual servers. Here are some basic commands using virsh.
To list all the xen virtual machines configured on the dom0 server :
[root@unixfoo-xen23 ~]# virsh list
Id Name State
———————————-
0 Domain-0 running
12 domU04foo blocked
14 domU02foo running
15 domU03foo blocked
19 domU05foo blocked
21 domU06foo blocked
22 domU07foo blocked
See information of a particular xen domain :
[root@unixfoo-xen23 ~]# virsh dominfo 12
Id: 12
Name: domU04foo
UUID: d3a108f2324fad2e0de2e5c20f
OS Type: hvm
State: blocked
CPU(s): 1
CPU time: 3183.1s
Max memory: 2097152 kB
Used memory: 2097152 kB
Gather the domain info in xml format :
This will be easy to develop custom monitoring scripts for xen. This gives information about
- Xen Domain name
- UUID
- Para-virt / Full-virt
- domU memory
- domU cpu count
- domU mac-id
- domU block-storage
[root@unixfoo-xen23 ~]# virsh dumpxml 12
<domain type=’xen’ id=’12’>
<name>domU04foo</name>
<uuid>d3a108f2324fad2e0de2e5c20f</uuid>
<os>
<type>hvm</type>
<loader>/usr/lib/xen/boot/hvmloader</loader>
<boot dev=’hd’/>
</os>
<memory>2097152</memory>
<vcpu>1</vcpu>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<devices>
<emulator>/usr/lib/xen/bin/qemu-dm</emulator>
<interface type=’bridge’>
<source bridge=’xenbr0’/>
<mac address=’00:XX:XX:XX:AD:XX’/>
<script path=’vif-bridge’/>
</interface>
<disk type=’file’ device=’disk’>
<driver name=’file’/>
<source file=’/xen/domU04foo/domU04foo.img’/>
<target dev=’hda’/>
</disk>
</devices>
</domain>
Print CPU information for domU :
[root@unixfoo-xen23 ~]# virsh vcpuinfo 12
VCPU: 0
CPU: 6
State: blocked
CPU time: 3184.2s
CPU Affinity: yyyyyyyy
Print the information about dom0 Xen server :
[root@unixfoo-xen23 ~]# virsh nodeinfo
CPU model: i686
CPU(s): 8
CPU frequency: 1861 MHz
CPU socket(s): 2
Core(s) per socket: 4
Thread(s) per core: 1
NUMA cell(s): 1
Memory size: 33553408 kB
Other virsh commands :
[root@unixfoo-xen23 ~]# virsh help
Commands:
connect (re)connect to hypervisor
create create a domain from an XML file
start start a (previously defined) inactive domain
destroy destroy a domain
define define (but don’t start) a domain from an XML file
domid convert a domain name or UUID to domain id
domuuid convert a domain name or id to domain UUID
dominfo domain information
domname convert a domain id or UUID to domain name
domstate domain state
dumpxml domain information in XML
help print help
list list domains
nodeinfo node information
quit quit this interactive terminal
reboot reboot a domain
restore restore a domain from a saved state in a file
resume resume a domain
save save a domain state to a file
dump dump the core of a domain to a file for analysis
shutdown gracefully shutdown a domain
setmem change memory allocation
setmaxmem change maximum memory limit
setvcpus change number of virtual CPUs
suspend suspend a domain
undefine undefine an inactive domain
vcpuinfo domain vcpu information
vcpupin control domain vcpu affinity
version show version
[root@unixfoo-xen23 ~]#
Read more on Virtualization : http://unixfoo.blogspot.com/search/label/virtualization