func AppDeploy(configStore *config.Store, serviceRuntime *runtime.ServiceRuntime, app, env, version string) error {
log.Printf("Pulling image %s...", version)
image, err := serviceRuntime.PullImage(version, "")
if image == nil || err != nil {
return fmt.Errorf("unable to pull %s. Has it been released yet?", version)
}
svcCfg, err := configStore.GetApp(app, env)
if err != nil {
return fmt.Errorf("unable to deploy app: %s.", err)
}
if svcCfg == nil {
return fmt.Errorf("app %s does not exist. Create it first.", app)
}
svcCfg.SetVersion(version)
svcCfg.SetVersionID(utils.StripSHA(image.ID))
updated, err := configStore.UpdateApp(svcCfg, env)
if err != nil {
return fmt.Errorf("could not store version: %s", err)
}
if !updated {
return fmt.Errorf("%s NOT deployed.", version)
}
log.Printf("Deployed %s.\n", version)
return nil
}
// inspectImage checks that the running image matches the config.
// We only use this to print warnings, since we likely need to deploy a new
// config version to fix the inconsistency.
func inspectImage(appCfg config.App) {
image, err := serviceRuntime.InspectImage(appCfg.Version())
if err != nil {
log.Println("error inspecting image", appCfg.Version())
return
}
if utils.StripSHA(image.ID) != appCfg.VersionID() {
log.Printf("warning: %s image ID does not match config", appCfg.Name())
}
}
// Pull a docker image.
// If we have an image matching the tag, and the given id matches the current
// image, don't fetch a new one from the registry.
func (s *ServiceRuntime) PullImage(version, id string) (*docker.Image, error) {
image, err := s.InspectImage(version)
if err != nil && err != docker.ErrNoSuchImage {
return nil, err
}
if image != nil && utils.StripSHA(image.ID) == id {
return image, nil
}
registry, repository, tag := utils.SplitDockerImage(version)
// pull it down locally
pullOpts := docker.PullImageOptions{
Repository: repository,
Tag: tag,
OutputStream: log.DefaultLogger}
dockerAuth := findAuth(registry)
if registry != "" {
pullOpts.Repository = registry + "/" + repository
} else {
pullOpts.Repository = repository
}
pullOpts.Registry = registry
pullOpts.Tag = tag
retries := 0
for {
retries += 1
err = s.dockerClient.PullImage(pullOpts, dockerAuth)
if err != nil {
if retries > 3 {
return image, err
}
log.Errorf("ERROR: error pulling image %s. Attempt %d: %s", version, retries, err)
continue
}
break
}
return s.InspectImage(version)
}
func (s *ServiceRuntime) Start(env, pool string, appCfg config.App) (*docker.Container, error) {
img := appCfg.Version()
image, err := s.PullImage(img, appCfg.VersionID())
if err != nil {
return nil, err
}
if utils.StripSHA(image.ID) != appCfg.VersionID() {
log.Warnf("warning: ID for image %s doesn't match configuration", img)
}
// setup env vars from etcd
var envVars []string
envVars = append(envVars, "ENV"+"="+env)
for key, value := range appCfg.Env() {
if key == "ENV" {
continue
}
envVars = append(envVars, strings.ToUpper(key)+"="+s.replaceVarEnv(value, s.hostIP))
}
instanceId, err := s.NextInstanceSlot(appCfg.Name(), strconv.FormatInt(appCfg.ID(), 10))
if err != nil {
return nil, err
}
envVars = append(envVars, fmt.Sprintf("HOST_IP=%s", s.hostIP))
envVars = append(envVars, fmt.Sprintf("GALAXY_APP=%s", appCfg.Name()))
envVars = append(envVars, fmt.Sprintf("GALAXY_VERSION=%s", strconv.FormatInt(appCfg.ID(), 10)))
envVars = append(envVars, fmt.Sprintf("GALAXY_INSTANCE=%s", strconv.FormatInt(int64(instanceId), 10)))
publicDns, err := EC2PublicHostname()
if err != nil {
log.Warnf("Unable to determine public hostname. Not on AWS? %s", err)
publicDns = "127.0.0.1"
}
envVars = append(envVars, fmt.Sprintf("PUBLIC_HOSTNAME=%s", publicDns))
containerName := appCfg.ContainerName() + "." + strconv.FormatInt(int64(instanceId), 10)
container, err := s.dockerClient.InspectContainer(containerName)
_, ok := err.(*docker.NoSuchContainer)
if err != nil && !ok {
return nil, err
}
// Existing container is running or stopped. If the image has changed, stop
// and re-create it.
if container != nil && container.Image != image.ID {
if container.State.Running || container.State.Restarting || container.State.Paused {
log.Printf("Stopping %s version %s running as %s", appCfg.Name(), appCfg.Version(), container.ID[0:12])
err := s.dockerClient.StopContainer(container.ID, 10)
if err != nil {
return nil, err
}
}
log.Printf("Removing %s version %s running as %s", appCfg.Name(), appCfg.Version(), container.ID[0:12])
err = s.dockerClient.RemoveContainer(docker.RemoveContainerOptions{
ID: container.ID,
})
if err != nil {
return nil, err
}
container = nil
}
if container == nil {
config := &docker.Config{
Image: img,
Env: envVars,
}
mem := appCfg.GetMemory(pool)
if mem != "" {
m, err := utils.ParseMemory(mem)
if err != nil {
return nil, err
}
config.Memory = m
}
cpu := appCfg.GetCPUShares(pool)
if cpu != "" {
if c, err := strconv.Atoi(cpu); err == nil {
config.CPUShares = int64(c)
}
}
log.Printf("Creating %s version %s", appCfg.Name(), appCfg.Version())
container, err = s.dockerClient.CreateContainer(docker.CreateContainerOptions{
Name: containerName,
Config: config,
})
if err != nil {
return nil, err
}
}
log.Printf("Starting %s version %s running as %s", appCfg.Name(), appCfg.Version(), container.ID[0:12])
config := &docker.HostConfig{
PublishAllPorts: true,
RestartPolicy: docker.RestartPolicy{
Name: "on-failure",
MaximumRetryCount: 16,
},
LogConfig: docker.LogConfig{
Type: "syslog",
Config: map[string]string{"syslog-tag": containerName},
},
}
if s.dns != "" {
config.DNS = []string{s.dns}
}
err = s.dockerClient.StartContainer(container.ID, config)
return container, err
}