Upgrade to Synnefo v0.17

Upgrade Steps

The upgrade to v0.17 consists of the following steps:

  1. Upgrade Archipelago on all nodes to the latest version (0.4.4).


    For Pithos nodes see below.

     host# archipelago stop --pause
     host# apt-get upgrade
     host# archipelago start
    On Pithos node, the gunicorn must also be stopped first:
    host# service gunicorn stop
    host# archipelago stop --pause
    host# apt-get upgrade
    host# archipelago start
    host# service gunicorn start
  2. Upgrade Ganeti on all nodes to the latest version ()

    host# apt-get upgrade
    host# service gunicorn restart
  3. Upgrade Synnefo on all nodes to the latest version (0.17)

  4. Install the Ganeti and Synnefo. For the following steps, the Cyclades API must be down.

    cyclades.host# service gunicorn stop
  5. Run the migrations for the Cyclades DB:

    cyclades.host$ snf-manage migrate db
  6. Update the names of Archipelago volumes:

    cyclades.host$ /usr/lib/synnefo/tools/rename_unique_name_of_disks


    This script must not be re-run after cyclades API is started.

  7. Create helper VMs in all Ganeti clusters.

    Helper VMs are required for the deletion of detachable volumes. These helper VMs must be attributed to a user, and thus an admin account must be created. The account can be the same as the one used for the upload of the images.

    Before creating the helper VMs, you need to bring the Cyclades API back up, but firewall it from the outside world.

    In order to facilitate the creation of helper VMs, we have created an snf-manage command for this purpose:

    cyclades.host$ snf-manage helper-servers-sync --flavor <flavor_id> \
                     --image <image_id> --user <admin_user_id> \
                     --password *****

    The above script will create a helper server in all online Ganeti clusters and will immediately shut it down so that it reserves no resources.


    You must choose a flavor which has an Archipelago disk template.

  8. Once the syncing of the helper servers has finished, you can remove the firewall from the Cyclades API.

  9. On the node where pithos UI (snf-pithos-webclient) package is installed, remove existing pithos UI package and install the snf-ui-app package. The snf-pithos-webclient package is deprecated and should no longer be installed in any of your service nodes.

    (pithos-ui-node)$ apt-get remove snf-pithos-webclient --purge
    (pithos-ui-node)$ apt-get install snf-ui-app

Edit /etc/synnefo/20-snf-ui-cloudbar.conf and /etc/synnefo/20-snf-ui-settings.conf to match your deployment configuration.

Notice that the new UI application no longer redirects service root paths to the pithos UI endpoint. If you want to preserve this behaviour consider adding a rewrite rule such as the following in your apache vhost configuration.

RewriteRule ^/$ /ui [R=302]
  1. As of 0.17 admins can set their own implementation of backend allocator mechanism. Due to this change the default BACKEND_ALLOCATOR_MODULE setting is now changed to “synnefo.logic.allocators.default_allocator.DefaultAllocator”. Notice that previous default value for this setting is no longer supported.

  2. As of 0.17 VM passwords are stored to a volatile memory cache. This allows cyclades UI to inform users who accidentally forgot the password provided during vm creation process of the password once they open the machine connection info modal. The password is removed from cache once the user explicitly accepts that the password is written down or once a specific period is reached. To enable this feature add the following setting in 20-snf-cyclades-app-api.conf (you may use the same memcached server as the one in VMAPI_CACHE_BACKEND):

    CACHE_BACKEND = '<memcached-server-uri>'

    or you may use the format below to change the default timeout period:

    CACHE_BACKEND = '<memcached-server-uri>/?timeout=3600'