// NewMesosExecutorDriver creates a new mesos executor driver.
func NewMesosExecutorDriver(config DriverConfig) (*MesosExecutorDriver, error) {
if config.Executor == nil {
msg := "Executor callback interface cannot be nil."
log.Errorln(msg)
return nil, fmt.Errorf(msg)
}
hostname := mesosutil.GetHostname(config.HostnameOverride)
newMessenger := config.NewMessenger
if newMessenger == nil {
newMessenger = func() (messenger.Messenger, error) {
process := process.New("executor")
return messenger.ForHostname(process, hostname, config.BindingAddress, config.BindingPort, config.PublishedAddress)
}
}
driver := &MesosExecutorDriver{
status: mesosproto.Status_DRIVER_NOT_STARTED,
stopCh: make(chan struct{}),
updates: make(map[string]*mesosproto.StatusUpdate),
tasks: make(map[string]*mesosproto.TaskInfo),
workDir: ".",
started: make(chan struct{}),
}
driver.cond = sync.NewCond(&driver.lock)
// decouple serialized executor callback execution from goroutines of this driver
var execLock sync.Mutex
driver.withExecutor = func(f func(e Executor)) {
go func() {
execLock.Lock()
defer execLock.Unlock()
f(config.Executor)
}()
}
var err error
if driver.messenger, err = newMessenger(); err != nil {
return nil, err
}
if err = driver.init(); err != nil {
log.Errorf("failed to initialize the driver: %v", err)
return nil, err
}
return driver, nil
}
// NewMesosExecutorDriver creates a new mesos executor driver.
func NewMesosExecutorDriver(config DriverConfig) (*MesosExecutorDriver, error) {
if config.Executor == nil {
msg := "Executor callback interface cannot be nil."
log.Errorln(msg)
return nil, fmt.Errorf(msg)
}
hostname := mesosutil.GetHostname(config.HostnameOverride)
newMessenger := config.NewMessenger
if newMessenger == nil {
newMessenger = func() (messenger.Messenger, error) {
process := process.New("executor")
return messenger.ForHostname(process, hostname, config.BindingAddress, config.BindingPort)
}
}
driver := &MesosExecutorDriver{
exec: config.Executor,
status: mesosproto.Status_DRIVER_NOT_STARTED,
stopCh: make(chan struct{}),
destroyCh: make(chan struct{}),
stopped: true,
updates: make(map[string]*mesosproto.StatusUpdate),
tasks: make(map[string]*mesosproto.TaskInfo),
workDir: ".",
}
var err error
if driver.messenger, err = newMessenger(); err != nil {
return nil, err
}
if err = driver.init(); err != nil {
log.Errorf("failed to initialize the driver: %v", err)
return nil, err
}
return driver, nil
}
// Create a new mesos scheduler driver with the given
// scheduler, framework info,
// master address, and credential(optional)
func NewMesosSchedulerDriver(config DriverConfig) (initializedDriver *MesosSchedulerDriver, err error) {
if config.Scheduler == nil {
err = fmt.Errorf("Scheduler callbacks required.")
} else if config.Master == "" {
err = fmt.Errorf("Missing master location URL.")
} else if config.Framework == nil {
err = fmt.Errorf("FrameworkInfo must be provided.")
} else if config.Credential != nil && config.WithAuthContext == nil {
err = fmt.Errorf("WithAuthContext must be provided when Credential != nil")
}
if err != nil {
return
}
framework := proto.Clone(config.Framework).(*mesos.FrameworkInfo)
// set default userid
if framework.GetUser() == "" {
user, err := user.Current()
if err != nil || user == nil {
if err != nil {
log.Warningf("Failed to obtain username: %v\n", err)
} else {
log.Warningln("Failed to obtain username.")
}
framework.User = proto.String("")
} else {
framework.User = proto.String(user.Username)
}
}
// default hostname
hostname := util.GetHostname(config.HostnameOverride)
if framework.GetHostname() == "" {
framework.Hostname = proto.String(hostname)
}
driver := &MesosSchedulerDriver{
frameworkInfo: framework,
stopCh: make(chan struct{}),
status: mesos.Status_DRIVER_NOT_STARTED,
cache: newSchedCache(),
credential: config.Credential,
failover: framework.Id != nil && len(framework.Id.GetValue()) > 0,
withAuthContext: config.WithAuthContext,
started: make(chan struct{}),
done: make(chan struct{}),
}
driver.withScheduler = driver.makeWithScheduler(config.Scheduler)
if framework.FailoverTimeout != nil && *framework.FailoverTimeout > 0 {
driver.failoverTimeout = *framework.FailoverTimeout * float64(time.Second)
log.V(1).Infof("found failover_timeout = %v", time.Duration(driver.failoverTimeout))
}
newDetector := config.NewDetector
if newDetector == nil {
newDetector = func() (detector.Master, error) {
return detector.New(config.Master)
}
}
newMessenger := config.NewMessenger
if newMessenger == nil {
newMessenger = func() (messenger.Messenger, error) {
process := process.New("scheduler")
return messenger.ForHostname(process, hostname, config.BindingAddress, config.BindingPort, config.PublishedAddress)
}
}
// initialize new detector.
if driver.masterDetector, err = newDetector(); err != nil {
return
} else if driver.messenger, err = newMessenger(); err != nil {
return
} else if err = driver.init(); err != nil {
return
} else {
initializedDriver = driver
}
return
}
// Create a new mesos scheduler driver with the given
// scheduler, framework info,
// master address, and credential(optional)
func NewMesosSchedulerDriver(config DriverConfig) (initializedDriver *MesosSchedulerDriver, err error) {
if config.Scheduler == nil {
err = fmt.Errorf("Scheduler callbacks required.")
} else if config.Master == "" {
err = fmt.Errorf("Missing master location URL.")
} else if config.Framework == nil {
err = fmt.Errorf("FrameworkInfo must be provided.")
} else if config.Credential != nil && config.WithAuthContext == nil {
err = fmt.Errorf("WithAuthContext must be provided when Credential != nil")
}
if err != nil {
return
}
framework := proto.Clone(config.Framework).(*mesos.FrameworkInfo)
// set default userid
if framework.GetUser() == "" {
user, err := user.Current()
if err != nil || user == nil {
if err != nil {
log.Warningf("Failed to obtain username: %v\n", err)
} else {
log.Warningln("Failed to obtain username.")
}
framework.User = proto.String("")
} else {
framework.User = proto.String(user.Username)
}
}
// default hostname
hostname := util.GetHostname(config.HostnameOverride)
if framework.GetHostname() == "" {
framework.Hostname = proto.String(hostname)
}
driver := &MesosSchedulerDriver{
frameworkInfo: framework,
stopCh: make(chan struct{}),
status: mesos.Status_DRIVER_NOT_STARTED,
cache: newSchedCache(),
credential: config.Credential,
failover: framework.Id != nil && len(framework.Id.GetValue()) > 0,
withAuthContext: config.WithAuthContext,
started: make(chan struct{}),
}
driver.eventCond = sync.NewCond(&driver.eventLock)
// mechanism that allows us to asynchronously invoke scheduler callbacks, but in a manner
// such that the callback invocations are serialized. useful because this will decouple the
// goroutine executing a messenger callback from the goroutine executing a scheduler callback,
// while preserving the serialization semantics for each type of callback handling.
// we use a chan to maintain the order of callback invocations; this is important for maintaining
// the order in which status updates are processed.
schedQueue := make(chan func(s Scheduler))
go func() {
for {
select {
case f := <-schedQueue:
f(config.Scheduler)
case <-driver.stopCh:
// check for a tie: abort() may have sent a message that we need to pass up
// to the user.
select {
case f := <-schedQueue:
f(config.Scheduler)
default:
}
return
}
}
}()
driver.withScheduler = func(f func(s Scheduler)) {
select {
case schedQueue <- f:
case <-driver.stopCh:
}
}
if framework.FailoverTimeout != nil && *framework.FailoverTimeout > 0 {
driver.failoverTimeout = *framework.FailoverTimeout * float64(time.Second)
log.V(1).Infof("found failover_timeout = %v", time.Duration(driver.failoverTimeout))
}
newMessenger := config.NewMessenger
if newMessenger == nil {
newMessenger = func() (messenger.Messenger, error) {
process := process.New("scheduler")
return messenger.ForHostname(process, hostname, config.BindingAddress, config.BindingPort, config.PublishedAddress)
}
}
// initialize new detector.
if driver.masterDetector, err = detector.New(config.Master); err != nil {
return
} else if driver.messenger, err = newMessenger(); err != nil {
return
} else if err = driver.init(); err != nil {
return
} else {
initializedDriver = driver
}
return
}