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