// EnableHASingle applies a single ControllersServersSpec specification to the current environment.
// Exported so it can be called by the legacy client API in the client package.
func EnableHASingle(st *state.State, spec params.ControllersSpec) (params.ControllersChanges, error) {
if !st.IsController() {
return params.ControllersChanges{}, errors.New("unsupported with hosted models")
}
// Check if changes are allowed and the command may proceed.
blockChecker := common.NewBlockChecker(st)
if err := blockChecker.ChangeAllowed(); err != nil {
return params.ControllersChanges{}, errors.Trace(err)
}
// Validate the environment tag if present.
if spec.ModelTag != "" {
tag, err := names.ParseModelTag(spec.ModelTag)
if err != nil {
return params.ControllersChanges{}, errors.Errorf("invalid model tag: %v", err)
}
if _, err := st.FindEntity(tag); err != nil {
return params.ControllersChanges{}, err
}
}
series := spec.Series
if series == "" {
ssi, err := st.ControllerInfo()
if err != nil {
return params.ControllersChanges{}, err
}
// We should always have at least one voting machine
// If we *really* wanted we could just pick whatever series is
// in the majority, but really, if we always copy the value of
// the first one, then they'll stay in sync.
if len(ssi.VotingMachineIds) == 0 {
// Better than a panic()?
return params.ControllersChanges{}, fmt.Errorf("internal error, failed to find any voting machines")
}
templateMachine, err := st.Machine(ssi.VotingMachineIds[0])
if err != nil {
return params.ControllersChanges{}, err
}
series = templateMachine.Series()
}
changes, err := st.EnableHA(spec.NumControllers, spec.Constraints, series, spec.Placement)
if err != nil {
return params.ControllersChanges{}, err
}
return controllersChanges(changes), nil
}
// EnableHASingle applies a single ControllersServersSpec specification to the current environment.
// Exported so it can be called by the legacy client API in the client package.
func EnableHASingle(st *state.State, spec params.ControllersSpec) (params.ControllersChanges, error) {
if !st.IsController() {
return params.ControllersChanges{}, errors.New("unsupported with hosted models")
}
// Check if changes are allowed and the command may proceed.
blockChecker := common.NewBlockChecker(st)
if err := blockChecker.ChangeAllowed(); err != nil {
return params.ControllersChanges{}, errors.Trace(err)
}
// Validate the environment tag if present.
if spec.ModelTag != "" {
tag, err := names.ParseModelTag(spec.ModelTag)
if err != nil {
return params.ControllersChanges{}, errors.Errorf("invalid model tag: %v", err)
}
if _, err := st.FindEntity(tag); err != nil {
return params.ControllersChanges{}, err
}
}
series := spec.Series
if series == "" {
ssi, err := st.ControllerInfo()
if err != nil {
return params.ControllersChanges{}, err
}
// We should always have at least one voting machine
// If we *really* wanted we could just pick whatever series is
// in the majority, but really, if we always copy the value of
// the first one, then they'll stay in sync.
if len(ssi.VotingMachineIds) == 0 {
// Better than a panic()?
return params.ControllersChanges{}, errors.Errorf("internal error, failed to find any voting machines")
}
templateMachine, err := st.Machine(ssi.VotingMachineIds[0])
if err != nil {
return params.ControllersChanges{}, err
}
series = templateMachine.Series()
}
if constraints.IsEmpty(&spec.Constraints) {
// No constraints specified, so we'll use the constraints off
// a running controller.
controllerInfo, err := st.ControllerInfo()
if err != nil {
return params.ControllersChanges{}, err
}
// We'll sort the controller ids to find the smallest.
// This will typically give the initial bootstrap machine.
var controllerIds []int
for _, id := range controllerInfo.MachineIds {
idNum, err := strconv.Atoi(id)
if err != nil {
logger.Warningf("ignoring non numeric controller id %v", id)
continue
}
controllerIds = append(controllerIds, idNum)
}
if len(controllerIds) == 0 {
errors.Errorf("internal error, failed to find any controllers")
}
sort.Ints(controllerIds)
// Load the controller machine and get its constraints.
controllerId := controllerIds[0]
controller, err := st.Machine(strconv.Itoa(controllerId))
if err != nil {
return params.ControllersChanges{}, errors.Annotatef(err, "reading controller id %v", controllerId)
}
spec.Constraints, err = controller.Constraints()
if err != nil {
return params.ControllersChanges{}, errors.Annotatef(err, "reading constraints for controller id %v", controllerId)
}
}
changes, err := st.EnableHA(spec.NumControllers, spec.Constraints, series, spec.Placement)
if err != nil {
return params.ControllersChanges{}, err
}
return controllersChanges(changes), nil
}