// Config returns the environment configuration for the environment
// with the given name. If the configuration is not
// found, an errors.NotFoundError is returned.
func (envs *Environs) Config(name string) (*config.Config, error) {
if name == "" {
name = envs.Default
if name == "" {
return nil, errors.New("no default model found")
}
}
attrs, ok := envs.rawEnvirons[name]
if !ok {
return nil, errors.NotFoundf("model %q", name)
}
if err := validateEnvironmentKind(attrs); err != nil {
return nil, errors.Trace(err)
}
// Check that we don't have any disallowed fields in new configs used for bootstrap.
for _, attr := range disallowedWithBootstrap {
if _, ok := attrs[attr]; ok {
return nil, fmt.Errorf("attribute %q is not allowed in bootstrap configurations", attr)
}
}
// If deprecated config attributes are used, log warnings so the user can know
// that they need to be fixed.
// We also look up what any new values might be so we can tell the user.
newAttrs := config.ProcessDeprecatedAttributes(attrs)
envs.logDeprecatedWarnings(attrs, newAttrs, config.ToolsMetadataURLKey, config.AgentMetadataURLKey)
// null has been renamed to manual (with an alias for existing config).
if oldType, _ := attrs["type"].(string); oldType == "null" {
logger.Warningf(
"Provider type \"null\" has been renamed to \"manual\".\n" +
"Please update your model configuration.",
)
}
// lxc-use-clone has been renamed to lxc-clone
envs.logDeprecatedWarnings(attrs, newAttrs, config.LxcUseClone, config.LxcClone)
// provisioner-safe-mode has been renamed to provisioner-harvest-mode, so log warnings to the user
envs.logDeprecatedWarnings(attrs, newAttrs, config.ProvisionerSafeModeKey, config.ProvisionerHarvestModeKey)
// tools-stream has been renamed to agent-stream, so log warnings to the user
envs.logDeprecatedWarnings(attrs, newAttrs, config.ToolsStreamKey, config.AgentStreamKey)
// Block attributes only matter if they have been used
envs.logBlockDeprecationWarnings(attrs)
cfg, err := config.New(config.UseDefaults, attrs)
if err != nil {
return nil, err
}
return cfg, nil
}
// EnvironmentSet implements the server-side part of the
// set-environment CLI command.
func (c *Client) EnvironmentSet(args params.EnvironmentSet) error {
if err := c.check.ChangeAllowed(); err != nil {
return errors.Trace(err)
}
// Make sure we don't allow changing agent-version.
checkAgentVersion := func(updateAttrs map[string]interface{}, removeAttrs []string, oldConfig *config.Config) error {
if v, found := updateAttrs["agent-version"]; found {
oldVersion, _ := oldConfig.AgentVersion()
if v != oldVersion.String() {
return fmt.Errorf("agent-version cannot be changed")
}
}
return nil
}
// Replace any deprecated attributes with their new values.
attrs := config.ProcessDeprecatedAttributes(args.Config)
// TODO(waigani) 2014-3-11 #1167616
// Add a txn retry loop to ensure that the settings on disk have not
// changed underneath us.
return c.api.state.UpdateEnvironConfig(attrs, nil, checkAgentVersion)
}
// ModelSet implements the server-side part of the
// set-model-config CLI command.
func (c *ModelConfigAPI) ModelSet(args params.ModelSet) error {
if err := c.checkCanWrite(); err != nil {
return err
}
if err := c.check.ChangeAllowed(); err != nil {
return errors.Trace(err)
}
// Make sure we don't allow changing agent-version.
checkAgentVersion := func(updateAttrs map[string]interface{}, removeAttrs []string, oldConfig *config.Config) error {
if v, found := updateAttrs["agent-version"]; found {
oldVersion, _ := oldConfig.AgentVersion()
if v != oldVersion.String() {
return errors.New("agent-version cannot be changed")
}
}
return nil
}
// Replace any deprecated attributes with their new values.
attrs := config.ProcessDeprecatedAttributes(args.Config)
return c.backend.UpdateModelConfig(attrs, nil, checkAgentVersion)
}