Upgrade to Jessie

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Debian upgrades must be performed one version change at a time. If you don't know which version you are on, or which version is next, you can find information on the entire upgrade path at Debian Upgrades.

This upgrade should only be performed if you installed from, or already ran the Upgrade to Wheezy (Debian 7).

Upgrade Debian Wheezy to Jessie

  1. Make sure your existing CanIt installation is up-to-date:
  2. Now upgrade the OS to Jessie:
    upgrade-canit-appliance jessie
    Then you'll see messages scroll by, as the machine downloads, unpacks, and re-starts assorted services. (This all only delays mail during the re-start phase).
  3. We have had troubles with some appliances failing to install the Grub bootloader after the Jessie upgrade, so be sure to generate it again for all hard drives:
    dpkg-reconfigure grub-pc
    Should Grub fail to be installed, the system will not be able to load after a reboot. The only way to recover is to configure Grub with a rescue disk.
  4. Reboot the machine.
    To check if mail is flowing use the following:
    tail -f /var/log/mail-daily/current.log or wherever they are to see if working

NOTE: The above commands are for a single machine. If you are upgrading a cluster, then you should modify the steps as follows, starting with the DataBase machine:

  1. Stop CanIt on all cluster members before each command:
    /etc/init.d/canit-system stop-gracefully
  2. After the command in step (4) above, run:
    /etc/init.d/canit-system start
  3. Also, all commands should be run in parallel. That is, run (i) and then (1) on all machines, then (i) and (2) on all machines, and so on, finishing with (ii).

Upgrade to Stretch

With the release of Stretch in June 2017, Jessie is now the Old-Stable version of Debian, however it is still considered to be the stable version for use with CanIt.

While Stretch has been tested successfully and packages are available for it, we still consider it to be experimental. A wiki has been created detailing the Upgrade to Stretch.

Jessie will still be supported by Debian and CanIt packages will be released for it for the foreseeable future, so you are under no immediate obligation to upgrade. Also, when Stretch does become stable be aware that the upgrade to Jessie MUST be done before you can upgrade to it!

We will send an announcement out when Stretch is determined to be stable. If you are not signed up for our mailing list, you can find it here.