Golang driver.DistroDriver類代碼示例

func updateDockerOpts(dd driver.DistroDriver, args string) error {
	log.Printf("Updating daemon args to: %s", args)
	if err := dd.ChangeOpts(args); err != nil {
		return fmt.Errorf("error updating DOCKER_OPTS: %v", err)
	}
	return nil
}

func updateDockerOpts(dd driver.DistroDriver, args string) (bool, error) {
	log.Printf("Updating daemon args to: %s", args)
	restartNeeded, err := dd.UpdateDockerArgs(args)
	if err != nil {
		return false, fmt.Errorf("error updating DOCKER_OPTS: %v", err)
	}
	return restartNeeded, nil
}

func disable(he vmextension.HandlerEnvironment, d driver.DistroDriver) error {
	log.Printf("++ stop docker daemon")
	if err := d.StopDocker(); err != nil {
		return err
	}
	log.Printf("-- stop docker daemon")
	return nil
}

func uninstall(he vmextension.HandlerEnvironment, d driver.DistroDriver) error {
	log.Println("++ uninstall docker")
	if err := d.UninstallDocker(); err != nil {
		return err
	}
	log.Println("-- uninstall docker")

	log.Println("++ uninstall docker-compose")
	if err := uninstallDockerCompose(d); err != nil {
		return err
	}
	log.Println("++ uninstall docker-compose")
	return nil
}

// getArgs provides set of arguments that should be used in updating Docker
// daemon options based on the distro.
func getArgs(s DockerHandlerSettings, dd driver.DistroDriver) string {
	args := dd.BaseOpts()

	if s.Certs.HasDockerCerts() {
		tls := []string{"--tlsverify",
			fmt.Sprintf("--tlscacert=%s", filepath.Join(dockerCfgDir, dockerCaCert)),
			fmt.Sprintf("--tlscert=%s", filepath.Join(dockerCfgDir, dockerSrvCert)),
			fmt.Sprintf("--tlskey=%s", filepath.Join(dockerCfgDir, dockerSrvKey)),
		}
		args = append(args, tls...)
	}

	if s.Docker.Port != "" {
		args = append(args, fmt.Sprintf("-H=0.0.0.0:%s", s.Docker.Port))
	}

	if len(s.Docker.Options) > 0 {
		args = append(args, s.Docker.Options...)
	}

	return strings.Join(args, " ")
}

func enable(he vmextension.HandlerEnvironment, d driver.DistroDriver) error {
	// Install docker daemon
	log.Printf("++ install docker")
	if _, err := exec.LookPath("docker"); err == nil {
		log.Printf("docker already installed. not re-installing")
	} else {
		if err := d.InstallDocker(); err != nil {
			return err
		}
	}
	log.Printf("-- install docker")

	// Install docker-compose
	log.Printf("++ install docker-compose")
	if err := installCompose(composeBinPath(d)); err != nil {
		return fmt.Errorf("error installing docker-compose: %v", err)
	}
	log.Printf("-- install docker-compose")

	// Add user to 'docker' group to user docker as non-root
	u, err := util.GetAzureUser()
	if err != nil {
		return fmt.Errorf("failed to get provisioned user: %v", err)
	}
	log.Printf("++ add user to docker group")
	if out, err := executil.Exec("usermod", "-aG", "docker", u); err != nil {
		log.Printf("%s", string(out))
		return err
	}
	log.Printf("-- add user to docker group")

	settings, err := parseSettings(he.HandlerEnvironment.ConfigFolder)
	if err != nil {
		return err
	}

	// Install docker remote access certs
	log.Printf("++ setup docker certs")
	if err := installDockerCerts(*settings, dockerCfgDir); err != nil {
		return fmt.Errorf("error installing docker certs: %v", err)
	}
	log.Printf("-- setup docker certs")

	// Update dockeropts
	log.Printf("++ update dockeropts")
	if err := updateDockerOpts(d, getArgs(*settings, d)); err != nil {
		return fmt.Errorf("failed to update dockeropts: %v", err)
	}
	log.Printf("-- update dockeropts")

	// Restart docker
	log.Printf("++ restart docker")
	if err := d.RestartDocker(); err != nil {
		return err
	}
	time.Sleep(3 * time.Second) // wait for instance to come up
	log.Printf("-- restart docker")

	// Login Docker registry server
	log.Printf("++ login docker registry")
	if err := loginRegistry(settings.Login); err != nil {
		return err
	}
	log.Printf("-- login docker registry")

	// Compose Up
	log.Printf("++ compose up")
	if err := composeUp(d, settings.ComposeJson); err != nil {
		return fmt.Errorf("'compose up' failed: %v", err)
	}
	log.Printf("-- compose up")
	return nil
}

// composeBinPath returns the path docker-compose binary should be installed at
// on the host operating system.
func composeBinPath(d driver.DistroDriver) string {
	return filepath.Join(d.DockerComposeDir(), composeBin)
}

func enable(he vmextension.HandlerEnvironment, d driver.DistroDriver) error {
	// Install docker daemon
	log.Printf("++ install docker")
	if _, err := exec.LookPath("docker"); err == nil {
		log.Printf("docker already installed. not re-installing")
	} else {
		// TODO(ahmetb) Temporary retry logic around installation for serialization
		// problem in Azure VM Scale Sets. In case of scale-up event, the new VM with
		// multiple extensions (such as Linux Diagnostics and Docker Extension) will install
		// the extensions in parallel and that will result in non-deterministic
		// acquisition of dpkg lock (apt-get install) and thus causing one of the
		// extensions to fail.
		//
		// Adding this temporary retry logic just for Linux Diagnostics extension
		// assuming it will take at most 5 minutes to be done with apt-get lock.
		//
		// This retry logic should be removed once the issue is fixed on the resource
		// provider layer.

		var (
			nRetries      = 6
			retryInterval = time.Minute * 1
		)

		for nRetries > 0 {
			if err := d.InstallDocker(); err != nil {
				nRetries--
				if nRetries == 0 {
					return err
				}
				log.Printf("install failed. remaining attempts=%d. error=%v", nRetries, err)
				log.Printf("sleeping %s", retryInterval)
				time.Sleep(retryInterval)
			} else {
				break
			}
		}
	}
	log.Printf("-- install docker")

	// Install docker-compose
	log.Printf("++ install docker-compose")
	if err := installCompose(composeBinPath(d)); err != nil {
		return fmt.Errorf("error installing docker-compose: %v", err)
	}
	log.Printf("-- install docker-compose")

	// Add user to 'docker' group to user docker as non-root
	u, err := util.GetAzureUser()
	if err != nil {
		return fmt.Errorf("failed to get provisioned user: %v", err)
	}
	log.Printf("++ add user to docker group")
	if out, err := executil.Exec("usermod", "-aG", "docker", u); err != nil {
		log.Printf("%s", string(out))
		return err
	}
	log.Printf("-- add user to docker group")

	settings, err := parseSettings(he.HandlerEnvironment.ConfigFolder)
	if err != nil {
		return err
	}

	// Install docker remote access certs
	log.Printf("++ setup docker certs")
	if err := installDockerCerts(*settings, dockerCfgDir); err != nil {
		return fmt.Errorf("error installing docker certs: %v", err)
	}
	log.Printf("-- setup docker certs")

	// Update dockeropts
	log.Printf("++ update dockeropts")
	restartNeeded, err := updateDockerOpts(d, getArgs(*settings, d))
	if err != nil {
		return fmt.Errorf("failed to update dockeropts: %v", err)
	}
	log.Printf("restart needed: %v", restartNeeded)
	log.Printf("-- update dockeropts")

	// Restart docker
	log.Printf("++ restart docker")
	if !restartNeeded {
		log.Printf("no restart needed. issuing only a start command.")
		_ = d.StartDocker() // ignore error as it already may be running due to multiple calls to enable
	} else {
		log.Printf("restarting docker-engine")
		if err := d.RestartDocker(); err != nil {
			return err
		}
	}
	time.Sleep(3 * time.Second) // wait for instance to come up
	log.Printf("-- restart docker")

	// Login Docker registry server
	log.Printf("++ login docker registry")
	if err := loginRegistry(settings.Login); err != nil {
		return err
	}
	log.Printf("-- login docker registry")
//.........這裏部分代碼省略.........