Exemple #1
0
// getAllUnits returns a list of all principal and subordinate units
// assigned to the given machine.
func getAllUnits(st *state.State, machineTag string) ([]string, error) {
	machine, err := st.Machine(state.MachineIdFromTag(machineTag))
	if err != nil {
		return nil, err
	}
	// Start a watcher on machine's units, read the initial event and stop it.
	watch := machine.WatchUnits()
	defer watch.Stop()
	if units, ok := <-watch.Changes(); ok {
		return units, nil
	}
	return nil, fmt.Errorf("cannot obtain units of machine %q: %v", machineTag, watch.Err())
}
Exemple #2
0
func (a *MachineAgent) Entity(st *state.State) (AgentState, error) {
	m, err := st.Machine(a.MachineId)
	if err != nil {
		return nil, err
	}
	// Check the machine nonce as provisioned matches the agent.Conf value.
	if !m.CheckProvisioned(a.Conf.MachineNonce) {
		// The agent is running on a different machine to the one it
		// should be according to state. It must stop immediately.
		log.Errorf("running machine %v agent on inappropriate instance", m)
		return nil, worker.ErrTerminateAgent
	}
	return m, nil
}
Exemple #3
0
func (a *MachineAgent) Entity(st *state.State) (AgentState, error) {
	return st.Machine(a.MachineId)
}