Virtualization in Grid'5000: Difference between revisions
Jump to navigation
Jump to search
mNo edit summary |
|||
Line 7: | Line 7: | ||
= Usage = | = Usage = | ||
=== First submit the job | === First, submit the job using habitual oarsub command === | ||
jdoe@fnancy:~$ oarsub -I | jdoe@fnancy:~$ oarsub -I | ||
Line 37: | Line 37: | ||
}} | }} | ||
=== Now, you can run the guest OS | === Now, you can run the guest OS using kvm === | ||
jdoe@griffon-37:~$ screen kvm -m 512 -hda /tmp/squeeze-x64-base.img -net nic,macaddr=$MACADDR -net tap,ifname=tap0,script=no -nographic | jdoe@griffon-37:~$ screen kvm -m 512 -hda /tmp/squeeze-x64-base.img -net nic,macaddr=$MACADDR -net tap,ifname=tap0,script=no -nographic | ||
=== Or, you can start the guest OS using libvirt === | |||
* Edit the domain file | |||
eg : <code class="file">domain.xml</code> | |||
<domain type='kvm'> | |||
<name>squeeze-vm1</name> | |||
<memory>524288</memory> | |||
<vcpu>1</vcpu> | |||
<os> | |||
<type arch="x86_64">hvm</type> | |||
</os> | |||
<clock sync="localtime"/> | |||
<devices> | |||
<disk type='file' device='disk'> | |||
<source file='/tmp/squeeze-x64-base.img'/> | |||
<target dev='hda'/> | |||
</disk> | |||
<interface type='ethernet'> | |||
<target dev='tap0'/> | |||
<script path='no'/> | |||
<mac address='00:16:3e:82:a6:ea'/> | |||
</interface> | |||
<graphics type='vnc' port='5900'/> | |||
</devices> | |||
</domain> | |||
* Now, the guest OS can be started. | |||
jdoe@griffon-37:~$ virsh create domain.xml | |||
* You can use <code class="command">virsh</code> to manage your guest OS. | |||
jdoe@griffon-37:~$ virsh list | |||
{{Note|text= Use the mac address generated with the script | |||
}} | |||
= Misc notes = | = Misc notes = | ||
* Manage console for all your guest OS with [[Screen]] | * Manage the console for all your guest OS with [[Screen]] | ||
* Use <code class="command">tunctl</code> if you need to delete a Tun/Tap device. | * Use <code class="command">tunctl</code> if you need to delete a Tun/Tap device. | ||
jdoe@griffon-37:~$ /usr/sbin/tunctl -d tap0 | jdoe@griffon-37:~$ /usr/sbin/tunctl -d tap0 |
Revision as of 15:16, 30 November 2011
Purpose
This page presents ways to use KVM on production image.
Usage
First, submit the job using habitual oarsub command
jdoe@fnancy:~$ oarsub -I
Copy the kvm disk image to /tmp on the node
jdoe@griffon-37:~$ cp /grid5000/images/KVM/squeeze-x64-base.img /tmp/
Create Tun/Tap interface for your guest OS
jdoe@griffon-37:~$ sudo create_tap
- Tun/Tap interfaces are listed by issuing the command
/sbin/ifconfig
.
jdoe@griffon-37:~$ /sbin/ifconfig
[...] tap0 Link encap:Ethernet HWaddr 5a:ff:a4:97:c6:a8 inet6 addr: fe80::58ff:a4ff:fe97:c6a8/64 Scope:Link UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:29435 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Generate a random mac address for the Tun/Tap interface
- Use the following script
jdoe@griffon-37:~$ MACADDR="00:16:3e:$(dd if=/dev/urandom count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\).*$/\1:\2:\3/')"; echo $MACADDR
![]() |
Note |
---|---|
The first three octets are important (identification for the virtualized network). Don't change it. |
Now, you can run the guest OS using kvm
jdoe@griffon-37:~$ screen kvm -m 512 -hda /tmp/squeeze-x64-base.img -net nic,macaddr=$MACADDR -net tap,ifname=tap0,script=no -nographic
Or, you can start the guest OS using libvirt
- Edit the domain file
eg : domain.xml
<domain type='kvm'> <name>squeeze-vm1</name> <memory>524288</memory> <vcpu>1</vcpu> <os> <type arch="x86_64">hvm</type> </os> <clock sync="localtime"/> <devices> <disk type='file' device='disk'>
<target dev='hda'/> </disk> <interface type='ethernet'> <target dev='tap0'/> <script path='no'/> <mac address='00:16:3e:82:a6:ea'/> </interface> <graphics type='vnc' port='5900'/> </devices> </domain>
- Now, the guest OS can be started.
jdoe@griffon-37:~$ virsh create domain.xml
- You can use
virsh
to manage your guest OS.
jdoe@griffon-37:~$ virsh list
Misc notes
- Manage the console for all your guest OS with Screen
- Use
tunctl
if you need to delete a Tun/Tap device.
jdoe@griffon-37:~$ /usr/sbin/tunctl -d tap0