Golang Config.Type方法代码示例

// BootstrapConfig returns a copy of the supplied configuration with
// secret attributes removed. If the resulting config is not suitable
// for bootstrapping an environment, an error is returned.
func BootstrapConfig(cfg *config.Config) (*config.Config, error) {
	p, err := Provider(cfg.Type())
	if err != nil {
		return nil, err
	}
	secrets, err := p.SecretAttrs(cfg)
	if err != nil {
		return nil, err
	}
	m := cfg.AllAttrs()
	for k := range secrets {
		delete(m, k)
	}

	// We never want to push admin-secret or the root CA private key to the cloud.
	delete(m, "admin-secret")
	m["ca-private-key"] = ""
	if cfg, err = config.New(m); err != nil {
		return nil, err
	}
	if _, ok := cfg.AgentVersion(); !ok {
		return nil, fmt.Errorf("environment configuration has no agent-version")
	}
	return cfg, nil
}

// FinishMachineConfig sets fields on a MachineConfig that can be determined by
// inspecting a plain config.Config and the machine constraints at the last
// moment before bootstrapping. It assumes that the supplied Config comes from
// an environment that has passed through all the validation checks in the
// Bootstrap func, and that has set an agent-version (via FindBootstrapTools,
// or otherwise).
// TODO(fwereade) This function is not meant to be "good" in any serious way:
// it is better that this functionality be collected in one place here than
// that it be spread out across 3 or 4 providers, but this is its only
// redeeming feature.
func FinishMachineConfig(mcfg *cloudinit.MachineConfig, cfg *config.Config, cons constraints.Value) (err error) {
	defer utils.ErrorContextf(&err, "cannot complete machine configuration")

	// Everything needs the environment's authorized keys.
	authKeys := cfg.AuthorizedKeys()
	if authKeys == "" {
		return fmt.Errorf("environment configuration has no authorized-keys")
	}
	mcfg.AuthorizedKeys = authKeys
	if mcfg.MachineEnvironment == nil {
		mcfg.MachineEnvironment = make(map[string]string)
	}
	mcfg.MachineEnvironment[osenv.JujuProviderType] = cfg.Type()
	if !mcfg.StateServer {
		return nil
	}

	// These settings are only appropriate at bootstrap time. At the
	// moment, the only state server is the bootstrap node, but this
	// will probably change.
	if mcfg.APIInfo != nil || mcfg.StateInfo != nil {
		return fmt.Errorf("machine configuration already has api/state info")
	}
	caCert, hasCACert := cfg.CACert()
	if !hasCACert {
		return fmt.Errorf("environment configuration has no ca-cert")
	}
	password := cfg.AdminSecret()
	if password == "" {
		return fmt.Errorf("environment configuration has no admin-secret")
	}
	passwordHash := utils.PasswordHash(password)
	mcfg.APIInfo = &api.Info{Password: passwordHash, CACert: caCert}
	mcfg.StateInfo = &state.Info{Password: passwordHash, CACert: caCert}
	mcfg.StatePort = cfg.StatePort()
	mcfg.APIPort = cfg.APIPort()
	mcfg.Constraints = cons
	if mcfg.Config, err = BootstrapConfig(cfg); err != nil {
		return err
	}

	// These really are directly relevant to running a state server.
	cert, key, err := cfg.GenerateStateServerCertAndKey()
	if err != nil {
		return fmt.Errorf("cannot generate state server certificate: %v", err)
	}
	mcfg.StateServerCert = cert
	mcfg.StateServerKey = key
	return nil
}

// New returns a new environment based on the provided configuration.
func New(config *config.Config) (Environ, error) {
	p, err := Provider(config.Type())
	if err != nil {
		return nil, err
	}
	return p.Open(config)
}