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dhojgaard
Asked: 2013-05-08 04:59:18 +0800 CST

How to configure MAAS to be able to boot virtual machines

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I am running a virtual (kvm) MAAS/juju setup where most of the MAAS nodes (including MAAS master) are virtual, but some are also physical nodes. The physical Dell 1950 nodes configures automatically for boot in MAAS, so when i deploy via Juju they power on automatically. My problem lies in trying to set up boot for virtual systems. I see the posibility in the MAAS for power type. I can choose virsh. But i need to fill in information i do not know. What should i fill in for Driver and Power ID?

Anyone has experience with that?

juju

2 Answers

  1. In maas 1.2 through 1.8 the virsh power type requires only the Address and Power ID.

    MAAS 1.8 Screenshot MAAS 1.8 virsh power settings

    MAAS 1.2-1.4 Screenshot MAAS 1.2-1.4 virsh power settings

    The libvirt-bin package needs to be installed to get the virsh command

    $ sudo apt-get -y install libvirt-bin

    the Power ID is the name of the virtual machine shown by sudo virsh list --all

    The address is a normal libvirt connect string:

    qemu+ssh://[email protected]/system

    or

    qemu:///system

    If you want to use ssh you'll need to generate a ssh key pair for the maas user. By default there is no home directory created for the maas user.

    $ sudo mkdir -p ~maas
$ sudo chown maas:maas ~maas

    Add a login shell for the maas user (we'll only need this for the ssh-copy-id command later; if you're putting ssh keys in place manually or using a different mechanism, this step isn't strictly needed):

    $ sudo chsh -s /bin/bash maas

    Generate a SSH keypair as the maas user (hit enter three times to accept the default path and empty password):

    $ sudo -u maas ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/maas/.ssh/id_rsa): 
Created directory '/home/maas/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/maas/.ssh/id_rsa.
Your public key has been saved in /home/maas/.ssh/id_rsa.pub.

    Then add the public key to ~ubuntu/.ssh/authorized_keys on the vm server so virsh can use ssh without a password:

    $ sudo -u maas -i ssh-copy-id [email protected]

    As the maas user, test virsh commands against libvirt at 10.0.0.2:

    $ sudo -u maas virsh -c qemu+ssh://[email protected]/system list --all
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  2. Driver and Username are not required for virsh. They will be deleted eventually.b

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