// applicationSetCharm sets the charm for the given for the application.
func (api *API) applicationSetCharm(
appName string,
application Application,
url string,
channel csparams.Channel,
configSettingsStrings map[string]string,
configSettingsYAML string,
forceSeries,
forceUnits bool,
resourceIDs map[string]string,
storageConstraints map[string]params.StorageConstraints,
) error {
curl, err := charm.ParseURL(url)
if err != nil {
return errors.Trace(err)
}
sch, err := api.backend.Charm(curl)
if err != nil {
return errors.Trace(err)
}
var settings charm.Settings
if configSettingsYAML != "" {
settings, err = sch.Config().ParseSettingsYAML([]byte(configSettingsYAML), appName)
} else if len(configSettingsStrings) > 0 {
settings, err = parseSettingsCompatible(sch.Config(), configSettingsStrings)
}
if err != nil {
return errors.Annotate(err, "parsing config settings")
}
var stateStorageConstraints map[string]state.StorageConstraints
if len(storageConstraints) > 0 {
stateStorageConstraints = make(map[string]state.StorageConstraints)
for name, cons := range storageConstraints {
stateCons := state.StorageConstraints{Pool: cons.Pool}
if cons.Size != nil {
stateCons.Size = *cons.Size
}
if cons.Count != nil {
stateCons.Count = *cons.Count
}
stateStorageConstraints[name] = stateCons
}
}
cfg := state.SetCharmConfig{
Charm: api.stateCharm(sch),
Channel: channel,
ConfigSettings: settings,
ForceSeries: forceSeries,
ForceUnits: forceUnits,
ResourceIDs: resourceIDs,
StorageConstraints: stateStorageConstraints,
}
return application.SetCharm(cfg)
}
// AddToUnit validates and creates additional storage instances for units.
// This method handles bulk add operations and
// a failure on one individual storage instance does not block remaining
// instances from being processed.
// A "CHANGE" block can block this operation.
func (a *API) AddToUnit(args params.StoragesAddParams) (params.ErrorResults, error) {
// Check if changes are allowed and the operation may proceed.
blockChecker := common.NewBlockChecker(a.storage)
if err := blockChecker.ChangeAllowed(); err != nil {
return params.ErrorResults{}, errors.Trace(err)
}
if len(args.Storages) == 0 {
return params.ErrorResults{}, nil
}
serverErr := func(err error) params.ErrorResult {
if errors.IsNotFound(err) {
err = common.ErrPerm
}
return params.ErrorResult{Error: common.ServerError(err)}
}
paramsToState := func(p params.StorageConstraints) state.StorageConstraints {
s := state.StorageConstraints{Pool: p.Pool}
if p.Size != nil {
s.Size = *p.Size
}
if p.Count != nil {
s.Count = *p.Count
}
return s
}
result := make([]params.ErrorResult, len(args.Storages))
for i, one := range args.Storages {
u, err := names.ParseUnitTag(one.UnitTag)
if err != nil {
result[i] = serverErr(
errors.Annotatef(err, "parsing unit tag %v", one.UnitTag))
continue
}
err = a.storage.AddStorageForUnit(u,
one.StorageName,
paramsToState(one.Constraints))
if err != nil {
result[i] = serverErr(
errors.Annotatef(err, "adding storage %v for %v", one.StorageName, one.UnitTag))
}
}
return params.ErrorResults{Results: result}, nil
}
