wiki:install_kvm

Version 12 (modified by Ross, 11 years ago) (diff)

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This page documents the procedure for creating a new KVM guest on a mayfirst server.

This document is not complete! Do not use it to actually create a new KVM guest yet.

Creating a new KVM guest

  1. Install the kvm-manager scripts
  2. Run kvm-creator to create the new LV for the guest and the needed directory and files in /etc/sv/kvm/:
    USAGE: kvm-creator create|destroy|demo guestname [volumegroup [disksize [ram [tap [mac] ] ] ] 
    
  3. Initially it's a good idea to run the demo. This will give you a breakdown of how the server will be created.
    kvm-creator demo GUESTNAME
    
  4. After determining the settings you want the machine to have, run the demo command and then the 'create' command.
    EXAMPLE WITH OUTPUT:
    0 negri:~/preseed-repo/squeeze# kvm-creator demo hay vg_negri0 15G 512
    NAME : hay
    VG : vg_negri0
    SIZE : 15G
    RAM : 512
    TAP : tap5
    MAC : 02:01:00:00:00:06
    DISK : /dev/mapper/vg_negri0-hay
    0 negri:~/preseed-repo/squeeze# kvm-creator create hay vg_negri0 15G 512
    Adding user `hay' ...
    Adding new group `hay' (1005) ...
    Adding new user `hay' (1005) with group `hay' ...
    Creating home directory `/home/hay' ...
    Copying files from `/etc/skel' ...
      Logical volume "hay" created
    0 negri:~/preseed-repo/squeeze#
    
  5. Add at least one user to the access list for the new KVM guest's serial console
    1. Monkeysphere way:
      1. Add a uid to the /home/<guestname>/.monkeysphere/authorized_user_ids file
      2. Rebuild the monkeysphere-controlled SSH authorized_keys files:
        monkeysphere-authentication update-users 
        
    2. SSH key way
      1. Add an SSH key to the /home/<guestname>/.ssh/authorized_keys file
  6. If you are installing an operating system to the new KVM guest:
    1. Put the iso in the /usr/local/share/ISOs directory. Be sure to verify the checksums on downloaded ISOs!
    2. Customize the iso with details for the server you are installing
      1. First edit /root/server-specifics.cfg - change values to match the server you are building
      2. Change into /usr/local/share/ISOs: cd /usr/local/share/ISOs
      3. Run:
        di-maker install.iso /root/preseed.cfg /root/server-specifics.cfg /root/late_command
        
    3. Create a symlink called cd.iso in the /home/<guestname>/vms/<guestname>/ directory with a target of the desired ISO:
      ln -s  /usr/local/share/ISOs/<some-installer>.iso /home/<guestname/vms/<guestname>/cd.iso
      

  1. Tell runit to start the guest automatically
    update-service --add /etc/sv/kvm/SERVER-NAME
    
  2. Log into the new guest via ssh: ssh SERVER-NAME@HOST-NAME
  3. Install an OS: everything should be handled by preseed file