func (s *loginSuite) assertRemoteEnvironment(c *gc.C, st api.Connection, expected names.ModelTag) {
// Look at what the api thinks it has.
tag, err := st.ModelTag()
c.Assert(err, jc.ErrorIsNil)
c.Assert(tag, gc.Equals, expected)
// Look at what the api Client thinks it has.
client := st.Client()
// ModelUUID looks at the env tag on the api state connection.
c.Assert(client.ModelUUID(), gc.Equals, expected.Id())
// ModelInfo calls a remote method that looks up the environment.
info, err := client.ModelInfo()
c.Assert(err, jc.ErrorIsNil)
c.Assert(info.UUID, gc.Equals, expected.Id())
}
func (s *loginSuite) assertRemoteModel(c *gc.C, api api.Connection, expected names.ModelTag) {
// Look at what the api thinks it has.
tag, ok := api.ModelTag()
c.Assert(ok, jc.IsTrue)
c.Assert(tag, gc.Equals, expected)
// Look at what the api Client thinks it has.
client := api.Client()
// ModelUUID looks at the env tag on the api state connection.
uuid, ok := client.ModelUUID()
c.Assert(ok, jc.IsTrue)
c.Assert(uuid, gc.Equals, expected.Id())
// The code below is to verify that the API connection is operating on
// the expected model. We make a change in state on that model, and
// then check that it is picked up by a call to the API.
st, err := s.State.ForModel(tag)
c.Assert(err, jc.ErrorIsNil)
defer st.Close()
expectedCons := constraints.MustParse("mem=8G")
err = st.SetModelConstraints(expectedCons)
c.Assert(err, jc.ErrorIsNil)
cons, err := client.GetModelConstraints()
c.Assert(err, jc.ErrorIsNil)
c.Assert(cons, jc.DeepEquals, expectedCons)
}
// maybeSetAgentModelTag tries to update the agent configuration if
// it's missing a model tag. It doesn't *really* matter if it fails,
// because we can demonstrably connect without it, so we log any
// errors encountered and never return any to the client.
func maybeSetAgentModelTag(a agent.Agent, conn api.Connection) {
if a.CurrentConfig().Model().Id() == "" {
err := a.ChangeConfig(func(setter agent.ConfigSetter) error {
modelTag, err := conn.ModelTag()
if err != nil {
return errors.Annotate(err, "no model uuid set on api")
}
return setter.Migrate(agent.MigrateParams{
Model: modelTag,
})
})
if err != nil {
logger.Warningf("unable to save model uuid: %v", err)
// Not really fatal, just annoying.
}
}
}
// envEndpoint returns "/model/<model-uuid>/<destination>"
func envEndpoint(c *gc.C, apiState api.Connection, destination string) string {
modelTag, ok := apiState.ModelTag()
c.Assert(ok, jc.IsTrue)
return path.Join("/model", modelTag.Id(), destination)
}
// updateSupportedContainers records in state that a machine can run the specified containers.
// It starts a watcher and when a container of a given type is first added to the machine,
// the watcher is killed, the machine is set up to be able to start containers of the given type,
// and a suitable provisioner is started.
func (a *MachineAgent) updateSupportedContainers(
runner worker.Runner,
st api.Connection,
containers []instance.ContainerType,
agentConfig agent.Config,
) error {
pr := st.Provisioner()
tag := agentConfig.Tag().(names.MachineTag)
machine, err := pr.Machine(tag)
if errors.IsNotFound(err) || err == nil && machine.Life() == params.Dead {
return worker.ErrTerminateAgent
}
if err != nil {
return errors.Annotatef(err, "cannot load machine %s from state", tag)
}
if len(containers) == 0 {
if err := machine.SupportsNoContainers(); err != nil {
return errors.Annotatef(err, "clearing supported containers for %s", tag)
}
return nil
}
if err := machine.SetSupportedContainers(containers...); err != nil {
return errors.Annotatef(err, "setting supported containers for %s", tag)
}
initLock, err := cmdutil.HookExecutionLock(agentConfig.DataDir())
if err != nil {
return err
}
// Start the watcher to fire when a container is first requested on the machine.
modelUUID, err := st.ModelTag()
if err != nil {
return err
}
watcherName := fmt.Sprintf("%s-container-watcher", machine.Id())
// There may not be a CA certificate private key available, and without
// it we can't ensure that other Juju nodes can connect securely, so only
// use an image URL getter if there's a private key.
var imageURLGetter container.ImageURLGetter
if agentConfig.Value(agent.AllowsSecureConnection) == "true" {
cfg, err := pr.ModelConfig()
if err != nil {
return errors.Annotate(err, "unable to get environ config")
}
imageURLGetter = container.NewImageURLGetter(
// Explicitly call the non-named constructor so if anyone
// adds additional fields, this fails.
container.ImageURLGetterConfig{
ServerRoot: st.Addr(),
ModelUUID: modelUUID.Id(),
CACert: []byte(agentConfig.CACert()),
CloudimgBaseUrl: cfg.CloudImageBaseURL(),
Stream: cfg.ImageStream(),
ImageDownloadFunc: container.ImageDownloadURL,
})
}
params := provisioner.ContainerSetupParams{
Runner: runner,
WorkerName: watcherName,
SupportedContainers: containers,
ImageURLGetter: imageURLGetter,
Machine: machine,
Provisioner: pr,
Config: agentConfig,
InitLock: initLock,
}
handler := provisioner.NewContainerSetupHandler(params)
a.startWorkerAfterUpgrade(runner, watcherName, func() (worker.Worker, error) {
w, err := watcher.NewStringsWorker(watcher.StringsConfig{
Handler: handler,
})
if err != nil {
return nil, errors.Annotatef(err, "cannot start %s worker", watcherName)
}
return w, nil
})
return nil
}
// envEndpoint returns "/model/<model-uuid>/<destination>"
func envEndpoint(c *gc.C, apiState api.Connection, destination string) string {
modelTag, err := apiState.ModelTag()
c.Assert(err, jc.ErrorIsNil)
return path.Join("/model", modelTag.Id(), destination)
}