func AppAssign(configStore *config.Store, app, env, pool string) error {
// Don't allow deleting runtime hosts entries
if app == "hosts" || app == "pools" {
return fmt.Errorf("invalid app name: %s", app)
}
exists, err := configStore.PoolExists(env, pool)
if err != nil {
return err
}
if !exists {
log.Warnf("WARN: Pool %s does not exist.", pool)
}
created, err := configStore.AssignApp(app, env, pool)
if err != nil {
return err
}
if created {
log.Printf("Assigned %s in env %s to pool %s.\n", app, env, pool)
} else {
log.Printf("%s already assigned to pool %s in env %s.\n", app, pool, env)
}
return nil
}
func pullImage(appCfg config.App) (*docker.Image, error) {
image, err := serviceRuntime.InspectImage(appCfg.Version())
if image != nil && image.ID == appCfg.VersionID() || appCfg.VersionID() == "" {
return image, nil
}
log.Printf("Pulling %s version %s\n", appCfg.Name(), appCfg.Version())
image, err = serviceRuntime.PullImage(appCfg.Version(),
appCfg.VersionID())
if image == nil || err != nil {
log.Errorf("ERROR: Could not pull image %s: %s",
appCfg.Version(), err)
return nil, err
}
if image.ID != appCfg.VersionID() && len(appCfg.VersionID()) > 12 {
log.Errorf("ERROR: Pulled image for %s does not match expected ID. Expected: %s: Got: %s",
appCfg.Version(),
image.ID[0:12], appCfg.VersionID()[0:12])
return nil, errors.New(fmt.Sprintf("failed to pull image ID %s", appCfg.VersionID()[0:12]))
}
log.Printf("Pulled %s\n", appCfg.Version())
return image, nil
}
func (s *ServiceRuntime) stopContainer(container *docker.Container) error {
if _, ok := blacklistedContainerId[container.ID]; ok {
log.Printf("Container %s blacklisted. Won't try to stop.\n", container.ID)
return nil
}
log.Printf("Stopping %s container %s\n", strings.TrimPrefix(container.Name, "/"), container.ID[0:12])
c := make(chan error, 1)
go func() { c <- s.dockerClient.StopContainer(container.ID, 10) }()
select {
case err := <-c:
if err != nil {
log.Printf("ERROR: Unable to stop container: %s\n", container.ID)
return err
}
case <-time.After(20 * time.Second):
blacklistedContainerId[container.ID] = true
log.Printf("ERROR: Timed out trying to stop container. Zombie?. Blacklisting: %s\n", container.ID)
return nil
}
log.Printf("Stopped %s container %s\n", strings.TrimPrefix(container.Name, "/"), container.ID[0:12])
return nil
// TODO: why is this commented out?
// Should we verify that containers are actually removed somehow?
/* return s.dockerClient.RemoveContainer(docker.RemoveContainerOptions{
ID: container.ID,
RemoveVolumes: true,
})*/
}
func poolCreate(c *cli.Context) {
ensureEnvArg(c)
ensurePoolArg(c)
initStore(c)
created, err := configStore.CreatePool(utils.GalaxyPool(c), utils.GalaxyEnv(c))
if err != nil {
log.Fatalf("ERROR: Could not create pool: %s", err)
return
}
if created {
log.Printf("Pool %s created\n", utils.GalaxyPool(c))
} else {
log.Printf("Pool %s already exists\n", utils.GalaxyPool(c))
}
ec2host, err := runtime.EC2PublicHostname()
if err != nil || ec2host == "" {
log.Debug("not running from AWS, skipping pool creation")
return
}
// now create the cloudformation stack
// is this fails, the stack can be created separately with
// stack:create_pool
stackCreatePool(c)
}
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
}
func ConfigList(configStore *config.Store, app, env string) error {
cfg, err := configStore.GetApp(app, env)
if err != nil {
return err
}
if cfg == nil {
return fmt.Errorf("unable to list config for %s.", app)
}
keys := sort.StringSlice{"ENV"}
for k, _ := range cfg.Env() {
keys = append(keys, k)
}
keys.Sort()
for _, k := range keys {
if k == "ENV" {
log.Printf("%s=%s\n", k, env)
continue
}
log.Printf("%s=%s\n", k, cfg.Env()[k])
}
return nil
}
func pgPsql(c *cli.Context) {
ensureEnvArg(c)
initStore(c)
app := ensureAppParam(c, "pg:psql")
appCfg, err := configStore.GetApp(app, utils.GalaxyEnv(c))
if err != nil {
log.Fatalf("ERROR: Unable to run command: %s.", err)
return
}
database_url := appCfg.Env()["DATABASE_URL"]
if database_url == "" {
log.Printf("No DATABASE_URL configured. Set one with config:set first.")
return
}
if !strings.HasPrefix(database_url, "postgres://") {
log.Printf("DATABASE_URL is not a postgres database.")
return
}
cmd := exec.Command("psql", database_url)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
// Ignore SIGINT while the process is running
ch := make(chan os.Signal, 1)
signal.Notify(ch, os.Interrupt)
defer func() {
signal.Stop(ch)
close(ch)
}()
go func() {
for {
_, ok := <-ch
if !ok {
break
}
}
}()
err = cmd.Start()
if err != nil {
log.Fatal(err)
}
err = cmd.Wait()
if err != nil {
fmt.Printf("Command finished with error: %v\n", err)
}
}
func monitorService(changedConfigs chan *config.ConfigChange) {
for {
var changedConfig *config.ConfigChange
select {
case changedConfig = <-changedConfigs:
if changedConfig.Error != nil {
log.Errorf("ERROR: Error watching changes: %s", changedConfig.Error)
continue
}
if changedConfig.AppConfig == nil {
continue
}
assigned, err := appAssigned(changedConfig.AppConfig.Name())
if err != nil {
log.Errorf("ERROR: Error retrieving service config for %s: %s", changedConfig.AppConfig.Name(), err)
if !loop {
return
}
continue
}
if !assigned {
continue
}
ch, ok := workerChans[changedConfig.AppConfig.Name()]
if !ok {
name := changedConfig.AppConfig.Name()
ch := make(chan string)
workerChans[name] = ch
wg.Add(1)
go restartContainers(name, ch)
ch <- "deploy"
log.Printf("Started new worker for %s\n", name)
continue
}
if changedConfig.Restart {
log.Printf("Restarting %s", changedConfig.AppConfig.Name())
ch <- "restart"
} else {
ch <- "deploy"
}
}
}
}
func (r *RedisBackend) subscribeChannel(key string, msgs chan string) {
var wg sync.WaitGroup
redisPool := redis.Pool{
MaxIdle: 1,
IdleTimeout: 0,
Dial: func() (redis.Conn, error) {
return redis.DialTimeout("tcp", r.RedisHost, time.Second, 0, 0)
},
// test every connection for now
TestOnBorrow: r.testOnBorrow,
}
for {
conn := redisPool.Get()
// no defer, doesn't return
if err := conn.Err(); err != nil {
conn.Close()
log.Printf("ERROR: %v\n", err)
time.Sleep(5 * time.Second)
continue
}
wg.Add(1)
psc := redis.PubSubConn{Conn: conn}
go func() {
defer wg.Done()
for {
switch n := psc.Receive().(type) {
case redis.Message:
msg := string(n.Data)
msgs <- msg
case error:
psc.Close()
log.Printf("ERROR: %v\n", n)
return
}
}
}()
wg.Add(1)
go func() {
defer wg.Done()
psc.Subscribe(key)
log.Printf("Monitoring for config changes on channel: %s\n", key)
}()
wg.Wait()
conn.Close()
}
}
func Register(serviceRuntime *runtime.ServiceRuntime, configStore *config.Store, env, pool, hostIP, shuttleAddr string) {
if shuttleAddr != "" {
client = shuttle.NewClient(shuttleAddr)
}
RegisterAll(serviceRuntime, configStore, env, pool, hostIP, shuttleAddr, false)
containerEvents := make(chan runtime.ContainerEvent)
err := serviceRuntime.RegisterEvents(env, pool, hostIP, containerEvents)
if err != nil {
log.Printf("ERROR: Unable to register docker event listener: %s", err)
}
for {
select {
case ce := <-containerEvents:
switch ce.Status {
case "start":
reg, err := configStore.RegisterService(env, pool, hostIP, ce.Container)
if err != nil {
log.Errorf("ERROR: Unable to register container: %s", err)
continue
}
log.Printf("Registered %s running as %s for %s%s", strings.TrimPrefix(reg.ContainerName, "/"),
reg.ContainerID[0:12], reg.Name, locationAt(reg))
registerShuttle(configStore, env, shuttleAddr)
case "die", "stop":
reg, err := configStore.UnRegisterService(env, pool, hostIP, ce.Container)
if err != nil {
log.Errorf("ERROR: Unable to unregister container: %s", err)
continue
}
if reg != nil {
log.Printf("Unregistered %s running as %s for %s%s", strings.TrimPrefix(reg.ContainerName, "/"),
reg.ContainerID[0:12], reg.Name, locationAt(reg))
}
RegisterAll(serviceRuntime, configStore, env, pool, hostIP, shuttleAddr, true)
pruneShuttleBackends(configStore, env, shuttleAddr)
}
case <-time.After(10 * time.Second):
RegisterAll(serviceRuntime, configStore, env, pool, hostIP, shuttleAddr, true)
pruneShuttleBackends(configStore, env, shuttleAddr)
}
}
}
func poolCreate(c *cli.Context) {
ensureEnvArg(c)
ensurePoolArg(c)
initStore(c)
created, err := configStore.CreatePool(utils.GalaxyPool(c), utils.GalaxyEnv(c))
if err != nil {
log.Fatalf("ERROR: Could not create pool: %s", err)
return
}
if created {
log.Printf("Pool %s created\n", utils.GalaxyPool(c))
} else {
log.Printf("Pool %s already exists\n", utils.GalaxyPool(c))
}
}
func (s *ServiceRuntime) RegisterAll(env, pool, hostIP string) ([]*config.ServiceRegistration, error) {
// make sure any old containers that shouldn't be running are gone
// FIXME: I don't like how a "Register" function has the possible side
// effect of stopping containers
s.StopUnassigned(env, pool)
containers, err := s.ManagedContainers()
if err != nil {
return nil, err
}
registrations := []*config.ServiceRegistration{}
for _, container := range containers {
name := s.EnvFor(container)["GALAXY_APP"]
registration, err := s.configStore.RegisterService(env, pool, hostIP, container)
if err != nil {
log.Printf("ERROR: Could not register %s: %s\n", name, err.Error())
continue
}
registrations = append(registrations, registration)
}
return registrations, nil
}
func poolDelete(c *cli.Context) {
ensureEnvArg(c)
ensurePoolArg(c)
initStore(c)
empty, err := configStore.DeletePool(utils.GalaxyPool(c), utils.GalaxyEnv(c))
if err != nil {
log.Fatalf("ERROR: Could not delete pool: %s", err)
return
}
if empty {
log.Printf("Pool %s deleted\n", utils.GalaxyPool(c))
} else {
log.Printf("Pool %s has apps assigned. Unassign them first.\n", utils.GalaxyPool(c))
}
}
func AppUnassign(configStore *config.Store, app, env, pool string) error {
// Don't allow deleting runtime hosts entries
if app == "hosts" || app == "pools" {
return fmt.Errorf("invalid app name: %s", app)
}
deleted, err := configStore.UnassignApp(app, env, pool)
if err != nil {
return err
}
if deleted {
log.Printf("Unassigned %s in env %s from pool %s\n", app, env, pool)
} else {
log.Printf("%s could not be unassigned.\n", pool)
}
return nil
}
// return --base, or try to find a base cloudformation stack
func getBase(c *cli.Context) string {
errNoBase := fmt.Errorf("could not identify a unique base stack")
base := c.String("base")
if base != "" {
return base
}
descResp, err := stack.DescribeStacks("")
if err != nil {
log.Fatal(err)
}
for _, stack := range descResp.Stacks {
// first check for galaxy:base tag
baseTag := false
for _, t := range stack.Tags {
if t.Key == "galaxy" && t.Value == "base" {
baseTag = true
}
}
if baseTag {
if base != "" {
err = errNoBase
}
base = stack.Name
continue
}
parts := strings.Split(stack.Name, "-")
// check for "-base" in the name
if parts[len(parts)-1] == "base" {
if base != "" {
err = errNoBase
}
base = stack.Name
continue
}
// the best we can do for now is look for a stack with a single word
if len(parts) == 1 {
if base != "" {
err = errNoBase
}
base = stack.Name
log.Printf("Warning: guessing base stack: %s", base)
}
}
if err != nil {
log.Fatalf("%s: %s", err, "use --base")
}
return base
}
func pullImage(appCfg config.App) (*docker.Image, error) {
image, err := serviceRuntime.PullImage(appCfg.Version(), appCfg.VersionID())
if image == nil || err != nil {
log.Errorf("ERROR: Could not pull image %s: %s", appCfg.Version(), err)
return nil, err
}
log.Printf("Pulled %s version %s\n", appCfg.Name(), appCfg.Version())
return image, nil
}
func AppCreate(configStore *config.Store, app, env string) error {
// Don't allow creating runtime hosts entries
if app == "hosts" {
return fmt.Errorf("could not create app: %s", app)
}
created, err := configStore.CreateApp(app, env)
if err != nil {
return fmt.Errorf("could not create app: %s", err)
}
if created {
log.Printf("Created %s in env %s.\n", app, env)
} else {
log.Printf("%s already exists in in env %s.", app, env)
}
return nil
}
func AppDelete(configStore *config.Store, app, env string) error {
// Don't allow deleting runtime hosts entries
if app == "hosts" || app == "pools" {
return fmt.Errorf("could not delete app: %s", app)
}
deleted, err := configStore.DeleteApp(app, env)
if err != nil {
return fmt.Errorf("could not delete app: %s", err)
}
if deleted {
log.Printf("Deleted %s from env %s.\n", app, env)
} else {
log.Printf("%s does not exists in env %s.\n", app, env)
}
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())
}
}
func ConfigUnset(configStore *config.Store, app, env string, envVars []string) error {
if len(envVars) == 0 {
return fmt.Errorf("no config values specified.")
}
svcCfg, err := configStore.GetApp(app, env)
if err != nil {
return fmt.Errorf("unable to unset config: %s.", err)
}
updated := false
for _, arg := range envVars {
k := strings.ToUpper(strings.TrimSpace(arg))
if k == "ENV" || svcCfg.EnvGet(k) == "" {
log.Warnf("%s cannot be unset.", k)
continue
}
log.Printf("%s\n", k)
svcCfg.EnvSet(strings.ToUpper(arg), "")
updated = true
}
if !updated {
return fmt.Errorf("Configuration NOT changed for %s", app)
}
updated, err = configStore.UpdateApp(svcCfg, env)
if err != nil {
return fmt.Errorf("ERROR: Unable to unset config: %s.", err)
}
if !updated {
return fmt.Errorf("Configuration NOT changed for %s", app)
}
log.Printf("Configuration changed for %s. v%d.\n", app, svcCfg.ID())
return nil
}
func (s *ServiceRuntime) UnRegisterAll(env, pool, hostIP string) ([]*docker.Container, error) {
containers, err := s.ManagedContainers()
if err != nil {
return nil, err
}
removed := []*docker.Container{}
for _, container := range containers {
name := s.EnvFor(container)["GALAXY_APP"]
_, err = s.configStore.UnRegisterService(env, pool, hostIP, container)
if err != nil {
log.Printf("ERROR: Could not unregister %s: %s\n", name, err)
return removed, err
}
removed = append(removed, container)
log.Printf("Unregistered %s as %s", container.ID[0:12], name)
}
return removed, nil
}
func startService(appCfg config.App, logStatus bool) {
desired, err := commander.Balanced(configStore, hostIP, appCfg.Name(), env, pool)
if err != nil {
log.Errorf("ERROR: Could not determine instance count: %s", err)
return
}
running, err := serviceRuntime.InstanceCount(appCfg.Name(), strconv.FormatInt(appCfg.ID(), 10))
if err != nil {
log.Errorf("ERROR: Could not determine running instance count: %s", err)
return
}
for i := 0; i < desired-running; i++ {
container, err := serviceRuntime.Start(env, pool, appCfg)
if err != nil {
log.Errorf("ERROR: Could not start containers: %s", err)
return
}
log.Printf("Started %s version %s as %s\n", appCfg.Name(), appCfg.Version(), container.ID[0:12])
err = serviceRuntime.StopOldVersion(appCfg, 1)
if err != nil {
log.Errorf("ERROR: Could not stop containers: %s", err)
}
}
running, err = serviceRuntime.InstanceCount(appCfg.Name(), strconv.FormatInt(appCfg.ID(), 10))
if err != nil {
log.Errorf("ERROR: Could not determine running instance count: %s", err)
return
}
for i := 0; i < running-desired; i++ {
err := serviceRuntime.Stop(appCfg)
if err != nil {
log.Errorf("ERROR: Could not stop container: %s", err)
}
}
err = serviceRuntime.StopOldVersion(appCfg, -1)
if err != nil {
log.Errorf("ERROR: Could not stop old containers: %s", err)
}
// check the image version, and log any inconsistencies
inspectImage(appCfg)
}
func (s *ServiceRuntime) StopOldVersion(appCfg config.App, limit int) error {
containers, err := s.ManagedContainers()
if err != nil {
return err
}
stopped := 0
for _, container := range containers {
if stopped == limit {
return nil
}
env := s.EnvFor(container)
// Container name does match one that would be started w/ this service config
if env["GALAXY_APP"] != appCfg.Name() {
continue
}
image, err := s.InspectImage(container.Image)
if err != nil {
log.Errorf("ERROR: Unable to inspect image: %s", container.Image)
continue
}
if image == nil {
log.Errorf("ERROR: Image for container %s does not exist!", container.ID[0:12])
continue
}
version := env["GALAXY_VERSION"]
if version == "" {
log.Printf("WARNING: %s missing GALAXY_VERSION", appCfg.ContainerName())
}
if version != strconv.FormatInt(appCfg.ID(), 10) && version != "" {
s.stopContainer(container)
stopped = stopped + 1
}
}
return nil
}
// FIXME: This can't be shut down. Make sure that's not a problem
func (c *ConsulBackend) sub(key string, msgs chan string) {
var events []*consul.UserEvent
var meta *consul.QueryMeta
var err error
for {
// No way to handle failure here, just keep trying to get our first set of events.
// We need a successful query to get the last index to search from.
events, meta, err = c.client.Event().List(key, nil)
if err != nil {
log.Println("Subscribe error:", err)
time.Sleep(5 * time.Second)
continue
}
// cache all old events
c.seen.Filter(events)
break
}
lastIndex := meta.LastIndex
for {
opts := &consul.QueryOptions{
WaitIndex: lastIndex,
WaitTime: 30 * time.Second,
}
events, meta, err = c.client.Event().List(key, opts)
if err != nil {
log.Printf("Subscribe(%s): %s\n", key, err.Error())
continue
}
if meta.LastIndex == lastIndex {
// no new events
continue
}
for _, event := range c.seen.Filter(events) {
msgs <- string(event.Payload)
}
lastIndex = meta.LastIndex
}
}
func (s *ServiceRuntime) ManagedContainers() ([]*docker.Container, error) {
apps := []*docker.Container{}
containers, err := s.dockerClient.ListContainers(docker.ListContainersOptions{
All: true,
})
if err != nil {
return apps, err
}
for _, c := range containers {
container, err := s.dockerClient.InspectContainer(c.ID)
if err != nil {
log.Printf("ERROR: Unable to inspect container: %s\n", c.ID)
continue
}
name := s.EnvFor(container)["GALAXY_APP"]
if name != "" && (container.State.Running || container.State.Restarting) {
apps = append(apps, container)
}
}
return apps, nil
}
func ConfigSet(configStore *config.Store, app, env string, envVars []string) error {
if len(envVars) == 0 {
bytes, err := ioutil.ReadAll(os.Stdin)
if err != nil {
return err
}
envVars = strings.Split(string(bytes), "\n")
}
if len(envVars) == 0 {
return fmt.Errorf("no config values specified.")
}
svcCfg, err := configStore.GetApp(app, env)
if err != nil {
return fmt.Errorf("unable to set config: %s.", err)
}
if svcCfg == nil {
svcCfg = configStore.NewAppConfig(app, "")
}
updated := false
for _, arg := range envVars {
if strings.TrimSpace(arg) == "" {
continue
}
if !strings.Contains(arg, "=") {
return fmt.Errorf("bad config variable format: %s", arg)
}
sep := strings.Index(arg, "=")
k := strings.ToUpper(strings.TrimSpace(arg[0:sep]))
v := strings.TrimSpace(arg[sep+1:])
if k == "ENV" {
log.Warnf("%s cannot be updated.", k)
continue
}
log.Printf("%s=%s\n", k, v)
svcCfg.EnvSet(k, v)
updated = true
}
if !updated {
return fmt.Errorf("configuration NOT changed for %s", app)
}
updated, err = configStore.UpdateApp(svcCfg, env)
if err != nil {
return fmt.Errorf("unable to set config: %s.", err)
}
if !updated {
return fmt.Errorf("configuration NOT changed for %s", app)
}
log.Printf("Configuration changed for %s. v%d\n", app, svcCfg.ID())
return nil
}
// RegisterEvents monitors the docker daemon for events, and returns those
// that require registration action over the listener chan.
func (s *ServiceRuntime) RegisterEvents(env, pool, hostIP string, listener chan ContainerEvent) error {
go func() {
c := make(chan *docker.APIEvents)
watching := false
for {
err := s.Ping()
if err != nil {
log.Errorf("ERROR: Unable to ping docker daemaon: %s", err)
if watching {
s.dockerClient.RemoveEventListener(c)
watching = false
}
time.Sleep(10 * time.Second)
continue
}
if !watching {
err = s.dockerClient.AddEventListener(c)
if err != nil && err != docker.ErrListenerAlreadyExists {
log.Printf("ERROR: Error registering docker event listener: %s", err)
time.Sleep(10 * time.Second)
continue
}
watching = true
}
select {
case e := <-c:
if e.Status == "start" || e.Status == "stop" || e.Status == "die" {
container, err := s.InspectContainer(e.ID)
if err != nil {
log.Printf("ERROR: Error inspecting container: %s", err)
continue
}
if container == nil {
log.Printf("WARN: Nil container returned for %s", e.ID[:12])
continue
}
name := s.EnvFor(container)["GALAXY_APP"]
if name != "" {
registration, err := s.configStore.GetServiceRegistration(env, pool, hostIP, container)
if err != nil {
log.Printf("WARN: Could not find service registration for %s/%s: %s", name, container.ID[:12], err)
continue
}
if registration == nil && e.Status != "start" {
continue
}
// if a container is restarting, don't continue re-registering the app
if container.State.Restarting {
continue
}
listener <- ContainerEvent{
Status: e.Status,
Container: container,
ServiceRegistration: registration,
}
}
}
case <-time.After(10 * time.Second):
// check for docker liveness
}
}
}()
return nil
}
func main() {
flag.Int64Var(&stopCutoff, "cutoff", 10, "Seconds to wait before stopping old containers")
flag.StringVar(®istryURL, "registry", utils.GetEnv("GALAXY_REGISTRY_URL", "redis://127.0.0.1:6379"), "registry URL")
flag.StringVar(&env, "env", utils.GetEnv("GALAXY_ENV", ""), "Environment namespace")
flag.StringVar(&pool, "pool", utils.GetEnv("GALAXY_POOL", ""), "Pool namespace")
flag.StringVar(&hostIP, "host-ip", "127.0.0.1", "Host IP")
flag.StringVar(&shuttleAddr, "shuttle-addr", "", "Shuttle API addr (127.0.0.1:9090)")
flag.StringVar(&dns, "dns", "", "DNS addr to use for containers")
flag.BoolVar(&debug, "debug", false, "verbose logging")
flag.BoolVar(&version, "v", false, "display version info")
flag.Usage = func() {
println("Usage: commander [options] <command> [<args>]\n")
println("Available commands are:")
println(" agent Runs commander agent")
println(" app List all apps")
println(" app:assign Assign an app to a pool")
println(" app:create Create an app")
println(" app:deploy Deploy an app")
println(" app:delete Delete an app")
println(" app:restart Restart an app")
println(" app:run Run a command within an app on this host")
println(" app:shell Run a shell within an app on this host")
println(" app:start Starts one or more apps")
println(" app:stop Stops one or more apps")
println(" app:unassign Unassign an app from a pool")
println(" config List config for an app")
println(" config:get Get config values for an app")
println(" config:set Set config values for an app")
println(" config:unset Unset config values for an app")
println(" runtime List container runtime policies")
println(" runtime:set Set container runtime policies")
println(" hosts List hosts in an env and pool")
println("\nOptions:\n")
flag.PrintDefaults()
}
flag.Parse()
if version {
fmt.Println(buildVersion)
return
}
log.DefaultLogger = log.New(os.Stdout, "", log.INFO)
log.DefaultLogger.SetFlags(0)
if debug {
log.DefaultLogger.Level = log.DEBUG
}
if flag.NArg() < 1 {
fmt.Println("Need a command")
flag.Usage()
os.Exit(1)
}
initOrDie()
switch flag.Args()[0] {
case "dump":
if flag.NArg() < 2 {
fmt.Println("Usage: commander dump ENV")
os.Exit(1)
}
dump(flag.Arg(1))
return
case "restore":
if flag.NArg() < 2 {
fmt.Println("Usage: commander dump ENV FILE")
os.Exit(1)
}
restore(flag.Arg(1))
return
case "agent":
log.DefaultLogger.SetFlags(golog.LstdFlags)
loop = true
agentFs := flag.NewFlagSet("agent", flag.ExitOnError)
agentFs.Usage = func() {
println("Usage: commander agent [options]\n")
println(" Runs commander continuously\n\n")
println("Options:\n\n")
agentFs.PrintDefaults()
}
agentFs.Parse(flag.Args()[1:])
ensureEnv()
ensurePool()
case "app":
appFs := flag.NewFlagSet("app", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander app\n")
println(" List all apps or apps in an environment\n")
println("Options:\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
err := commander.AppList(configStore, env)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "app:assign":
appFs := flag.NewFlagSet("app:assign", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander app:assign <app>\n")
println(" Assign an app to a pool\n")
println("Options:\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
ensurePool()
if appFs.NArg() != 1 {
appFs.Usage()
os.Exit(1)
}
err := commander.AppAssign(configStore, appFs.Args()[0], env, pool)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "app:create":
appFs := flag.NewFlagSet("app:create", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander app:create <app>\n")
println(" Create an app in an environment\n")
println("Options:\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
if appFs.NArg() == 0 {
appFs.Usage()
os.Exit(1)
}
err := commander.AppCreate(configStore, appFs.Args()[0], env)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "app:delete":
appFs := flag.NewFlagSet("app:delete", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander app:delete <app>\n")
println(" Delete an app in an environment\n")
println("Options:\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
if appFs.NArg() == 0 {
appFs.Usage()
os.Exit(1)
}
err := commander.AppDelete(configStore, appFs.Args()[0], env)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "app:deploy":
appFs := flag.NewFlagSet("app:delete", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander app:deploy [-force] <app> <version>\n")
println(" Deploy an app in an environment\n")
println("Options:\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
if appFs.NArg() != 2 {
appFs.Usage()
os.Exit(1)
}
err := commander.AppDeploy(configStore, serviceRuntime, appFs.Args()[0], env, appFs.Args()[1])
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "app:restart":
appFs := flag.NewFlagSet("app:restart", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander app:restart <app>\n")
println(" Restart an app in an environment\n")
println("Options:\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
if appFs.NArg() == 0 {
appFs.Usage()
os.Exit(1)
}
err := commander.AppRestart(configStore, appFs.Args()[0], env)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "app:run":
appFs := flag.NewFlagSet("app:run", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander app:run <app> <cmd>\n")
println(" Restart an app in an environment\n")
println("Options:\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
if appFs.NArg() < 2 {
appFs.Usage()
os.Exit(1)
}
err := commander.AppRun(configStore, serviceRuntime, appFs.Args()[0], env, appFs.Args()[1:])
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "app:shell":
appFs := flag.NewFlagSet("app:shell", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander app:shell <app>\n")
println(" Run a shell for an app\n")
println("Options:\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
ensurePool()
if appFs.NArg() != 1 {
appFs.Usage()
os.Exit(1)
}
err := commander.AppShell(configStore, serviceRuntime, appFs.Args()[0], env, pool)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "app:start":
startFs := flag.NewFlagSet("app:start", flag.ExitOnError)
startFs.Usage = func() {
println("Usage: commander app:start [options] [<app>]*\n")
println(" Starts one or more apps. If no apps are specified, starts all apps.\n")
println("Options:\n")
startFs.PrintDefaults()
}
startFs.Parse(flag.Args()[1:])
apps = startFs.Args()
if len(apps) == 0 {
acs, err := configStore.ListApps(env)
if err != nil {
log.Fatalf("ERROR: Unable to list apps: %s", err)
}
for _, ac := range acs {
apps = append(apps, ac.Name())
}
}
break
case "app:status":
// FIXME: undocumented
statusFs := flag.NewFlagSet("app:status", flag.ExitOnError)
statusFs.Usage = func() {
println("Usage: commander app:status [options] [<app>]*\n")
println(" Lists status of running apps.\n")
println("Options:\n")
statusFs.PrintDefaults()
}
statusFs.Parse(flag.Args()[1:])
ensureEnv()
ensurePool()
err := discovery.Status(serviceRuntime, configStore, env, pool, hostIP)
if err != nil {
log.Fatalf("ERROR: Unable to list app status: %s", err)
}
return
case "app:stop":
stopFs := flag.NewFlagSet("app:stop", flag.ExitOnError)
stopFs.Usage = func() {
println("Usage: commander app:stop [options] [<app>]*\n")
println(" Stops one or more apps. If no apps are specified, stops all apps.\n")
println("Options:\n")
stopFs.PrintDefaults()
}
stopFs.Parse(flag.Args()[1:])
apps = stopFs.Args()
for _, app := range apps {
err := serviceRuntime.StopAllMatching(app)
if err != nil {
log.Fatalf("ERROR: Unable able to stop all containers: %s", err)
}
}
if len(apps) > 0 {
return
}
err := serviceRuntime.StopAll(env)
if err != nil {
log.Fatalf("ERROR: Unable able to stop all containers: %s", err)
}
return
case "app:unassign":
appFs := flag.NewFlagSet("app:unassign", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander app:unassign <app>\n")
println(" Unassign an app to a pool\n")
println("Options:\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
ensurePool()
if appFs.NArg() != 1 {
appFs.Usage()
os.Exit(1)
}
err := commander.AppUnassign(configStore, appFs.Args()[0], env, pool)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "hosts":
hostFs := flag.NewFlagSet("hosts", flag.ExitOnError)
hostFs.Usage = func() {
println("Usage: commander hosts\n")
println(" List hosts in an env and pool\n")
println("Options:\n")
hostFs.PrintDefaults()
}
err := hostFs.Parse(flag.Args()[1:])
if err != nil {
log.Fatalf("ERROR: Bad command line options: %s", err)
}
ensureEnv()
ensurePool()
err = commander.HostsList(configStore, env, pool)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "config":
configFs := flag.NewFlagSet("config", flag.ExitOnError)
usage := "Usage: commander config <app>"
configFs.Usage = func() {
println(usage)
println(" List config values for an app\n")
println("Options:\n")
configFs.PrintDefaults()
}
err := configFs.Parse(flag.Args()[1:])
if err != nil {
log.Fatalf("ERROR: Bad command line options: %s", err)
}
ensureEnv()
if configFs.NArg() != 1 {
log.Error("ERROR: Missing app name argument")
log.Printf("Usage: %s", usage)
os.Exit(1)
}
app := configFs.Args()[0]
err = commander.ConfigList(configStore, app, env)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "config:get":
configFs := flag.NewFlagSet("config:get", flag.ExitOnError)
configFs.Usage = func() {
println("Usage: commander config <app> KEY [KEY]*\n")
println(" Get config values for an app\n")
println("Options:\n")
configFs.PrintDefaults()
}
err := configFs.Parse(flag.Args()[1:])
if err != nil {
log.Fatalf("ERROR: Bad command line options: %s", err)
}
ensureEnv()
if configFs.NArg() == 0 {
log.Errorf("ERROR: Missing app name")
configFs.Usage()
os.Exit(1)
}
app := configFs.Args()[0]
err = commander.ConfigGet(configStore, app, env, configFs.Args()[1:])
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "config:set":
configFs := flag.NewFlagSet("config:set", flag.ExitOnError)
configFs.Usage = func() {
println("Usage: commander config <app> KEY=VALUE [KEY=VALUE]*\n")
println(" Set config values for an app\n")
println("Options:\n")
configFs.PrintDefaults()
}
err := configFs.Parse(flag.Args()[1:])
if err != nil {
log.Fatalf("ERROR: Bad command line options: %s", err)
}
ensureEnv()
if configFs.NArg() == 0 {
log.Errorf("ERROR: Missing app name")
configFs.Usage()
os.Exit(1)
}
app := configFs.Args()[0]
err = commander.ConfigSet(configStore, app, env, configFs.Args()[1:])
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "config:unset":
configFs := flag.NewFlagSet("config:unset", flag.ExitOnError)
configFs.Usage = func() {
println("Usage: commander config <app> KEY [KEY]*\n")
println(" Unset config values for an app\n")
println("Options:\n")
configFs.PrintDefaults()
}
err := configFs.Parse(flag.Args()[1:])
if err != nil {
log.Fatalf("ERROR: Bad command line options: %s", err)
}
ensureEnv()
if configFs.NArg() == 0 {
log.Errorf("ERROR: Missing app name")
configFs.Usage()
os.Exit(1)
}
app := configFs.Args()[0]
err = commander.ConfigUnset(configStore, app, env, configFs.Args()[1:])
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "runtime":
runtimeFs := flag.NewFlagSet("runtime", flag.ExitOnError)
runtimeFs.Usage = func() {
println("Usage: commander runtime\n")
println(" List container runtime policies\n")
println("Options:\n")
runtimeFs.PrintDefaults()
}
err := runtimeFs.Parse(flag.Args()[1:])
if err != nil {
log.Fatalf("ERROR: Bad command line options: %s", err)
}
app := ""
if runtimeFs.NArg() > 0 {
app = runtimeFs.Args()[0]
}
err = commander.RuntimeList(configStore, app, env, pool)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
return
case "runtime:set":
var ps int
var m string
var c string
var vhost string
var port string
var maint string
runtimeFs := flag.NewFlagSet("runtime:set", flag.ExitOnError)
runtimeFs.IntVar(&ps, "ps", 0, "Number of instances to run across all hosts")
runtimeFs.StringVar(&m, "m", "", "Memory limit (format: <number><optional unit>, where unit = b, k, m or g)")
runtimeFs.StringVar(&c, "c", "", "CPU shares (relative weight)")
runtimeFs.StringVar(&vhost, "vhost", "", "Virtual host for HTTP routing")
runtimeFs.StringVar(&port, "port", "", "Service port for service discovery")
runtimeFs.StringVar(&maint, "maint", "", "Enable or disable maintenance mode")
runtimeFs.Usage = func() {
println("Usage: commander runtime:set [-ps 1] [-m 100m] [-c 512] [-vhost x.y.z] [-port 8000] [-maint false] <app>\n")
println(" Set container runtime policies\n")
println("Options:\n")
runtimeFs.PrintDefaults()
}
err := runtimeFs.Parse(flag.Args()[1:])
if err != nil {
log.Fatalf("ERROR: Bad command line options: %s", err)
}
ensureEnv()
if ps != 0 || m != "" || c != "" || maint != "" {
ensurePool()
}
if runtimeFs.NArg() != 1 {
runtimeFs.Usage()
os.Exit(1)
}
app := runtimeFs.Args()[0]
_, err = utils.ParseMemory(m)
if err != nil {
log.Fatalf("ERROR: Bad memory option %s: %s", m, err)
}
updated, err := commander.RuntimeSet(configStore, app, env, pool, commander.RuntimeOptions{
Ps: ps,
Memory: m,
CPUShares: c,
VirtualHost: vhost,
Port: port,
MaintenanceMode: maint,
})
if err != nil {
log.Fatalf("ERROR: %s", err)
}
if !updated {
log.Fatalf("ERROR: Failed to set runtime options.")
}
if pool != "" {
log.Printf("Runtime options updated for %s in %s running on %s", app, env, pool)
} else {
log.Printf("Runtime options updated for %s in %s", app, env)
}
return
case "runtime:unset":
var ps, m, c, port bool
var vhost string
runtimeFs := flag.NewFlagSet("runtime:unset", flag.ExitOnError)
runtimeFs.BoolVar(&ps, "ps", false, "Number of instances to run across all hosts")
runtimeFs.BoolVar(&m, "m", false, "Memory limit")
runtimeFs.BoolVar(&c, "c", false, "CPU shares (relative weight)")
runtimeFs.StringVar(&vhost, "vhost", "", "Virtual host for HTTP routing")
runtimeFs.BoolVar(&port, "port", false, "Service port for service discovery")
runtimeFs.Usage = func() {
println("Usage: commander runtime:unset [-ps] [-m] [-c] [-vhost x.y.z] [-port] <app>\n")
println(" Reset and removes container runtime policies to defaults\n")
println("Options:\n")
runtimeFs.PrintDefaults()
}
err := runtimeFs.Parse(flag.Args()[1:])
if err != nil {
log.Fatalf("ERROR: Bad command line options: %s", err)
}
ensureEnv()
if ps || m || c {
ensurePool()
}
if runtimeFs.NArg() != 1 {
runtimeFs.Usage()
os.Exit(1)
}
app := runtimeFs.Args()[0]
options := commander.RuntimeOptions{
VirtualHost: vhost,
}
if ps {
options.Ps = -1
}
if m {
options.Memory = "-"
}
if c {
options.CPUShares = "-"
}
if port {
options.Port = "-"
}
updated, err := commander.RuntimeUnset(configStore, app, env, pool, options)
if err != nil {
log.Fatalf("ERROR: %s", err)
}
if !updated {
log.Fatalf("ERROR: Failed to set runtime options.")
}
if pool != "" {
log.Printf("Runtime options updated for %s in %s running on %s", app, env, pool)
} else {
log.Printf("Runtime options updated for %s in %s", app, env)
}
return
case "pool":
err := commander.ListPools(configStore, env)
if err != nil {
log.Fatal(err)
}
return
case "pool:create":
appFs := flag.NewFlagSet("pool:create", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander -env <env> pool:create <pool>\n")
println(" Create a pool in <env>\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
if pool == "" && appFs.NArg() > 0 {
pool = appFs.Arg(0)
} else {
ensurePool()
}
err := commander.PoolCreate(configStore, env, pool)
if err != nil {
log.Fatalf("ERROR: Could not create pool: %s", err)
}
fmt.Println("created pool:", pool)
return
case "pool:delete":
appFs := flag.NewFlagSet("pool:delete", flag.ExitOnError)
appFs.Usage = func() {
println("Usage: commander -env <env> pool:delete <pool>\n")
println(" Delete a pool from <env>\n")
appFs.PrintDefaults()
}
appFs.Parse(flag.Args()[1:])
ensureEnv()
if pool == "" && flag.NArg() > 1 {
pool = flag.Arg(1)
} else {
ensurePool()
}
err := commander.PoolDelete(configStore, env, pool)
if err != nil {
log.Fatalf("ERROR: Could not delete pool: %s", err)
return
}
fmt.Println("deleted pool:", pool)
return
default:
fmt.Println("Unknown command")
flag.Usage()
os.Exit(1)
}
ensureEnv()
ensurePool()
log.Printf("Starting commander %s", buildVersion)
log.Printf("env=%s pool=%s host-ip=%s registry=%s shuttle-addr=%s dns=%s cutoff=%ds",
env, pool, hostIP, registryURL, shuttleAddr, dns, stopCutoff)
defer func() {
configStore.DeleteHost(env, pool, config.HostInfo{
HostIP: hostIP,
})
}()
for app, ch := range workerChans {
if len(apps) == 0 || utils.StringInSlice(app, apps) {
wg.Add(1)
go restartContainers(app, ch)
ch <- "deploy"
}
}
if loop {
wg.Add(1)
go heartbeatHost()
go discovery.Register(serviceRuntime, configStore, env, pool, hostIP, shuttleAddr)
cancelChan := make(chan struct{})
// do we need to cancel ever?
restartChan := configStore.Watch(env, cancelChan)
monitorService(restartChan)
}
// TODO: do we still need a WaitGroup?
wg.Wait()
}
func (s *ServiceRuntime) Start(env, pool string, appCfg config.App) (*docker.Container, error) {
img := appCfg.Version()
imgIdRef := appCfg.Version()
if appCfg.VersionID() != "" {
imgIdRef = appCfg.VersionID()
}
// see if we have the image locally
image, err := s.PullImage(img, imgIdRef)
if err != nil {
return nil, err
}
// 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,
},
}
if s.dns != "" {
config.DNS = []string{s.dns}
}
err = s.dockerClient.StartContainer(container.ID, config)
return container, err
}
func (s *ServiceRuntime) RunCommand(env string, appCfg config.App, cmd []string) (*docker.Container, error) {
// see if we have the image locally
fmt.Fprintf(os.Stderr, "Pulling latest image for %s\n", appCfg.Version())
_, err := s.PullImage(appCfg.Version(), appCfg.VersionID())
if err != nil {
return nil, err
}
instanceId, err := s.NextInstanceSlot(appCfg.Name(), strconv.FormatInt(appCfg.ID(), 10))
if err != nil {
return nil, err
}
envVars := []string{"ENV=" + env}
for key, value := range appCfg.Env() {
if key == "ENV" {
continue
}
envVars = append(envVars, strings.ToUpper(key)+"="+s.replaceVarEnv(value, s.hostIP))
}
envVars = append(envVars, "GALAXY_APP="+appCfg.Name())
envVars = append(envVars, "GALAXY_VERSION="+strconv.FormatInt(appCfg.ID(), 10))
envVars = append(envVars, fmt.Sprintf("GALAXY_INSTANCE=%s", strconv.FormatInt(int64(instanceId), 10)))
runCmd := []string{"/bin/bash", "-c", strings.Join(cmd, " ")}
container, err := s.dockerClient.CreateContainer(docker.CreateContainerOptions{
Config: &docker.Config{
Image: appCfg.Version(),
Env: envVars,
AttachStdout: true,
AttachStderr: true,
Cmd: runCmd,
OpenStdin: false,
},
})
if err != nil {
return nil, err
}
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, os.Kill)
go func(s *ServiceRuntime, containerId string) {
<-c
log.Println("Stopping container...")
err := s.dockerClient.StopContainer(containerId, 3)
if err != nil {
log.Printf("ERROR: Unable to stop container: %s", err)
}
err = s.dockerClient.RemoveContainer(docker.RemoveContainerOptions{
ID: containerId,
})
if err != nil {
log.Printf("ERROR: Unable to stop container: %s", err)
}
}(s, container.ID)
defer s.dockerClient.RemoveContainer(docker.RemoveContainerOptions{
ID: container.ID,
})
config := &docker.HostConfig{}
if s.dns != "" {
config.DNS = []string{s.dns}
}
err = s.dockerClient.StartContainer(container.ID, config)
if err != nil {
return container, err
}
// FIXME: Hack to work around the race of attaching to a container before it's
// actually running. Tried polling the container and then attaching but the
// output gets lost sometimes if the command executes very quickly. Not sure
// what's going on.
time.Sleep(1 * time.Second)
err = s.dockerClient.AttachToContainer(docker.AttachToContainerOptions{
Container: container.ID,
OutputStream: os.Stdout,
ErrorStream: os.Stderr,
Logs: true,
Stream: false,
Stdout: true,
Stderr: true,
})
if err != nil {
log.Printf("ERROR: Unable to attach to running container: %s", err.Error())
}
s.dockerClient.WaitContainer(container.ID)
return container, err
}