To test https://bugs.launchpad.net/landscape-charm/+bug/1439555 I deployed the trunk landscape-server charm with https://pastebin.canonical.com/128901/.
Verified that landscape-server/0 had RUN_CRON=yes in /etc/default/landscape-server.
I then deployed another unit of landscape-server, and verified that it had RUN_CRON=no
Finally, I destroyed the first unit, expecting the second one to become the "leader" and have RUN_CRON switched to yes. That didn't happen:
andreas@nsn7:~/deployer-configs/trusty/landscape-server$ juju destroy-unit landscape-server/0
andreas@nsn7:~/deployer-configs/trusty/landscape-server$ juju debug-log
unit-haproxy-0[902]: 2015-04-06 19:18:56 INFO unit.haproxy/0.reverseproxy-relation-departed logger.go:40 #015Reading package lists... 0%#015#015Reading package lists... 0%#015#015Reading package lists... 1%#015#015Reading package lists... 11%#015#015Reading package lists... 11%#015#015Reading package lists... 36%#015#015Reading package lists... 53%#015#015Reading package lists... 53%#015#015Reading package lists... 59%#015#015Reading package lists... 59%#015#015Reading package lists... 78%#015#015Reading package lists... 84%#015#015Reading package lists... 84%#015#015Reading package lists... 88%#015#015Reading package lists... 88%#015#015Reading package lists... 90%#015#015Reading package lists... 90%#015#015Reading package lists... 93%#015#015Reading package lists... 93%#015#015Reading package lists... 93%#015#015Reading package lists... 93%#015#015Reading package lists... 93%#015#015Reading package lists... 93%#015#015Reading package lists... 93%#015#015Reading package lists... 93%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 94%#015#015Reading package lists... 96%#015#015Reading package lists... 96%#015#015Reading package lists... 97%#015#015Reading package lists... 97%#015#015Reading package lists... 99%#015#015Reading package lists... 99%#015#015Reading package lists... 99%#015#015Reading package lists... 99%#015#015Reading package lists... Done
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.reverseproxy-relation-departed logger.go:40 #015Building dependency tree... 0%#015#015Building dependency tree... 0%#015#015Building dependency tree... 50%#015#015Building dependency tree... 50%#015#015Building dependency tree
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.reverseproxy-relation-departed logger.go:40 #015Reading state information... 0%#015#015Reading state information... 4%#015#015Reading state information... Done
machine-0: 2015-04-06 19:18:53 ERROR juju.rpc server.go:554 error writing response: write tcp 10.96.3.193:45008: broken pipe
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.juju-log cmd.go:247 reverseproxy:22: Unit 'landscape-server/1' overrides 'services', skipping further processing.
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.juju-log cmd.go:247 reverseproxy:22: Service: landscape-https
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.juju-log cmd.go:247 reverseproxy:22: Service: landscape-http
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.juju-log cmd.go:247 reverseproxy:22: Using self-signed certificate
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.juju-log cmd.go:247 reverseproxy:22: Required config not found or invalid (metrics_target, metrics_sample_interval), disabling metrics
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.reverseproxy-relation-departed logger.go:40 Configuration file is valid
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.reverseproxy-relation-departed logger.go:40 * Reloading haproxy haproxy
unit-haproxy-0[902]: 2015-04-06 19:18:57 INFO unit.haproxy/0.reverseproxy-relation-departed logger.go:40 ...done.
machine-0-lxc-7[846]: 2015-04-06 19:19:00 ERROR juju.worker runner.go:208 fatal "machiner": agent should be terminated
machine-0-lxc-7[846]: 2015-04-06 19:19:00 ERROR juju.api.watcher watcher.go:84 error trying to stop watcher: connection is shut down
machine-0-lxc-7[846]: 2015-04-06 19:19:00 ERROR juju.worker runner.go:208 fatal "api-post-upgrade": agent should be terminated
machine-0-lxc-7[846]: 2015-04-06 19:19:00 ERROR juju.worker runner.go:208 fatal "upgrader": connection is shut down
machine-0-lxc-7[846]: 2015-04-06 19:19:00 ERROR juju.worker runner.go:208 fatal "api": agent should be terminated
$ juju run --service landscape-server 'sudo grep RUN_CRON /etc/default/landscape-server'
# To run cron jobs on this server when RUN_ALL="no" set RUN_CRON to "yes".
RUN_CRON="no"
sudo: unable to resolve host juju-machine-0-lxc-10
