vagrant@vagrant-ubuntu-trusty-64:~$ juju status siege
environment: local
machines:
  "2":
    agent-state: started
    agent-version: 1.23-alpha1.1
    dns-name: 10.0.3.175
    instance-id: vagrant-local-machine-2
    series: trusty
    hardware: arch=amd64
services:
  siege:
    charm: local:trusty/siege-1
    exposed: false
    units:
      siege/0:
        agent-state: error
        agent-state-info: 'hook failed: "config-changed"'
        agent-version: 1.23-alpha1.1
        machine: "2"
        public-address: 10.0.3.175
vagrant@vagrant-ubuntu-trusty-64:~$ juju resolved siege/0
ERROR unit "siege/0" is not in an error state