func (s *ResumerSuite) TestResumerCalls(c *C) {
// Shorter interval and mock help to count
// the resumer calls in a given timespan.
testInterval := 10 * time.Millisecond
resumer.SetInterval(testInterval)
defer resumer.RestoreInterval()
tr := &transactionResumerMock{[]time.Time{}}
rr := resumer.NewResumer(tr)
defer func() { c.Assert(rr.Stop(), IsNil) }()
time.Sleep(10 * testInterval)
// Check that a numner of calls has happened with a time
// difference somewhere between the interval and twice the
// interval. A more precise time behavior cannot be
// specified due to the load during the test.
c.Assert(len(tr.timestamps) > 0, Equals, true)
for i := 1; i < len(tr.timestamps); i++ {
diff := tr.timestamps[i].Sub(tr.timestamps[i-1])
c.Assert(diff >= testInterval, Equals, true)
c.Assert(diff <= 2*testInterval, Equals, true)
}
}
func (s *ResumerSuite) TestRunStopWithState(c *C) {
// Test with state ensures that state fulfills the
// TransactionResumer interface.
rr := resumer.NewResumer(s.State)
c.Assert(rr.Stop(), IsNil)
}
// StateJobs returns a worker running all the workers that require
// a *state.State connection.
func (a *MachineAgent) StateWorker() (worker.Worker, error) {
st, entity, err := openState(a.Conf.Conf, a)
if err != nil {
return nil, err
}
// If this fails, other bits will fail, so we just log the error, and
// let the other failures actually restart runners
if err := EnsureAPIInfo(a.Conf.Conf, st, entity); err != nil {
log.Warningf("failed to EnsureAPIInfo: %v", err)
}
reportOpenedState(st)
m := entity.(*state.Machine)
// TODO(rog) use more discriminating test for errors
// rather than taking everything down indiscriminately.
dataDir := a.Conf.DataDir
runner := worker.NewRunner(allFatal, moreImportant)
runner.StartWorker("upgrader", func() (worker.Worker, error) {
// TODO(rog) use id instead of *Machine (or introduce Clone method)
return NewUpgrader(st, m, dataDir), nil
})
// At this stage, since we don't embed lxc containers, just start an lxc
// provisioner task for non-lxc containers. Since we have only LXC
// containers and normal machines, this effectively means that we only
// have an LXC provisioner when we have a normally provisioned machine
// (through the environ-provisioner). With the upcoming advent of KVM
// containers, it is likely that we will want an LXC provisioner on a KVM
// machine, and once we get nested LXC containers, we can remove this
// check.
providerType := os.Getenv("JUJU_PROVIDER_TYPE")
if providerType != provider.Local && m.ContainerType() != instance.LXC {
workerName := fmt.Sprintf("%s-provisioner", provisioner.LXC)
runner.StartWorker(workerName, func() (worker.Worker, error) {
return provisioner.NewProvisioner(provisioner.LXC, st, a.MachineId, dataDir), nil
})
}
// Take advantage of special knowledge here in that we will only ever want
// the storage provider on one machine, and that is the "bootstrap" node.
if providerType == provider.Local && m.Id() == bootstrapMachineId {
runner.StartWorker("local-storage", func() (worker.Worker, error) {
return localstorage.NewWorker(), nil
})
}
for _, job := range m.Jobs() {
switch job {
case state.JobHostUnits:
runner.StartWorker("deployer", func() (worker.Worker, error) {
return newDeployer(st, m.Id(), dataDir), nil
})
case state.JobManageEnviron:
runner.StartWorker("environ-provisioner", func() (worker.Worker, error) {
return provisioner.NewProvisioner(provisioner.ENVIRON, st, a.MachineId, dataDir), nil
})
runner.StartWorker("firewaller", func() (worker.Worker, error) {
return firewaller.NewFirewaller(st), nil
})
case state.JobManageState:
runner.StartWorker("apiserver", func() (worker.Worker, error) {
// If the configuration does not have the required information,
// it is currently not a recoverable error, so we kill the whole
// agent, potentially enabling human intervention to fix
// the agent's configuration file. In the future, we may retrieve
// the state server certificate and key from the state, and
// this should then change.
if len(a.Conf.StateServerCert) == 0 || len(a.Conf.StateServerKey) == 0 {
return nil, &fatalError{"configuration does not have state server cert/key"}
}
return apiserver.NewServer(st, fmt.Sprintf(":%d", a.Conf.APIPort), a.Conf.StateServerCert, a.Conf.StateServerKey)
})
runner.StartWorker("cleaner", func() (worker.Worker, error) {
return cleaner.NewCleaner(st), nil
})
runner.StartWorker("resumer", func() (worker.Worker, error) {
// The action of resumer is so subtle that it is not tested,
// because we can't figure out how to do so without brutalising
// the transaction log.
return resumer.NewResumer(st), nil
})
default:
log.Warningf("ignoring unknown job %q", job)
}
}
return newCloseWorker(runner, st), nil
}