Managing Transmission With CFEngine

Here is one way to manage a Transmission server with CFEngine.

packages:
        #This assumes you have configured CFEngine to handle packages properly for you.
        ubuntu::
                transmission                           action=install
                transmission-cli                       action=install
                transmission-common                    action=install
                transmission-daemon                    action=install
                transmission-gtk                       action=install


copy:
        # I have per hostname based configs, but transmission is tricky, you can't just edit the config file like normal
        # See the new_transmission_conf class for more
        $(master_files)/dockstars/transmission-settings-$(host).json    dest=/etc/transmission-daemon/settings.json
                                                type=checksum
                                                verify=true
                                                owner=root
                                                group=root
                                                mode=600
                                                define=new_transmission_conf

links:
        # Make sure startup and shutdown links are in place
        /var/lib/transmission-daemon/info/settings.json ->! /etc/transmission-daemon/settings.json
        /etc/rc1.d/K20transmission-daemon ->! /etc/init.d/transmission-daemon
        /etc/rc2.d/S20transmission-daemon ->! /etc/init.d/transmission-daemon

shellcommands:
        # Transmission actually overwrites changes to its config file when it stops, so you cannot edit the file
        # While it is running without some extra force:
        new_transmission_conf::
                # Make the file immutable so when we shut down transmission it won't overwrite it
                "/usr/bin/chattr +i /etc/transmission-daemon/settings.json"
                # Restart transmission to pick up the change
                "/etc/init.d/transmission-daemon restart"
                # Make sure to un-immutable the file afterwards, otherwise cfengine can't push out the next change
                "/usr/bin/chattr -i /etc/transmission-daemon/settings.json"