Rebooting units can cause the to go into an error state[0] and it seems to pop up in our CI from time to time when we enable huge pages on a machine. We can try to recover from this at least once before giving up on the test run. [0] https://bugs.launchpad.net/juju/+bug/2077936 Signed-off-by: Martin Kalcok <martin.kalcok@canonical.com>