// RunQinglet is responsible for setting up and running a qinglet. It is used in three different applications:
// 1 Integration tests
// 2 Qinglet binary
// 3 Standalone 'qingyuan' binary
// Eventually, #2 will be replaced with instances of #3
func RunQinglet(kcfg *QingletConfig, builder QingletBuilder) error {
kcfg.Hostname = nodeutil.GetHostname(kcfg.HostnameOverride)
if len(kcfg.NodeName) == 0 {
// Query the cloud provider for our node name, default to Hostname
nodeName := kcfg.Hostname
if kcfg.Cloud != nil {
var err error
instances, ok := kcfg.Cloud.Instances()
if !ok {
return fmt.Errorf("failed to get instances from cloud provider")
}
nodeName, err = instances.CurrentNodeName(kcfg.Hostname)
if err != nil {
return fmt.Errorf("error fetching current instance name from cloud provider: %v", err)
}
glog.V(2).Infof("cloud provider determined current node name to be %s", nodeName)
}
kcfg.NodeName = nodeName
}
eventBroadcaster := record.NewBroadcaster()
kcfg.Recorder = eventBroadcaster.NewRecorder(api.EventSource{Component: "qinglet", Host: kcfg.NodeName})
eventBroadcaster.StartLogging(glog.V(3).Infof)
if kcfg.QingClient != nil {
glog.V(4).Infof("Sending events to api server.")
eventBroadcaster.StartRecordingToSink(kcfg.QingClient.Events(""))
} else {
glog.Warning("No api server defined - no events will be sent to API server.")
}
capabilities.Setup(kcfg.AllowPrivileged, kcfg.HostNetworkSources)
credentialprovider.SetPreferredDockercfgPath(kcfg.RootDirectory)
if builder == nil {
builder = createAndInitQinglet
}
if kcfg.OSInterface == nil {
kcfg.OSInterface = qingcontainer.RealOS{}
}
k, podCfg, err := builder(kcfg)
if err != nil {
return fmt.Errorf("failed to create qinglet: %v", err)
}
// process pods and exit.
if kcfg.Runonce {
if _, err := k.RunOnce(podCfg.Updates()); err != nil {
return fmt.Errorf("runonce failed: %v", err)
}
glog.Infof("Started qinglet as runonce")
} else {
startQinglet(k, podCfg, kcfg)
glog.Infof("Started qinglet")
}
return nil
}
// Run runs the specified QingletExecutorServer.
func (s *QingletExecutorServer) Run(hks hyperqing.Interface, _ []string) error {
rand.Seed(time.Now().UTC().UnixNano())
if err := util.ApplyOomScoreAdj(0, s.OOMScoreAdj); err != nil {
log.Info(err)
}
var apiclient *client.Client
clientConfig, err := s.CreateAPIServerClientConfig()
if err == nil {
apiclient, err = client.New(clientConfig)
}
if err != nil {
// required for k8sm since we need to send api.Binding information
// back to the apiserver
log.Fatalf("No API client: %v", err)
}
log.Infof("Using root directory: %v", s.RootDirectory)
credentialprovider.SetPreferredDockercfgPath(s.RootDirectory)
shutdownCloser, err := s.syncExternalShutdownWatcher()
if err != nil {
return err
}
cadvisorInterface, err := cadvisor.New(s.CadvisorPort)
if err != nil {
return err
}
imageGCPolicy := qinglet.ImageGCPolicy{
HighThresholdPercent: s.ImageGCHighThresholdPercent,
LowThresholdPercent: s.ImageGCLowThresholdPercent,
}
diskSpacePolicy := qinglet.DiskSpacePolicy{
DockerFreeDiskMB: s.LowDiskSpaceThresholdMB,
RootFreeDiskMB: s.LowDiskSpaceThresholdMB,
}
//TODO(jdef) intentionally NOT initializing a cloud provider here since:
//(a) the qinglet doesn't actually use it
//(b) we don't need to create N-qinglet connections to zookeeper for no good reason
//cloud := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
//log.Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
hostNetworkSources, err := qinglet.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
if err != nil {
return err
}
tlsOptions, err := s.InitializeTLS()
if err != nil {
return err
}
mounter := mount.New()
if s.Containerized {
log.V(2).Info("Running qinglet in containerized mode (experimental)")
mounter = &mount.NsenterMounter{}
}
var dockerExecHandler dockertools.ExecHandler
switch s.DockerExecHandlerName {
case "native":
dockerExecHandler = &dockertools.NativeExecHandler{}
case "nsenter":
dockerExecHandler = &dockertools.NsenterExecHandler{}
default:
log.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandlerName)
dockerExecHandler = &dockertools.NativeExecHandler{}
}
kcfg := app.QingletConfig{
Address: s.Address,
AllowPrivileged: s.AllowPrivileged,
HostNetworkSources: hostNetworkSources,
HostnameOverride: s.HostnameOverride,
RootDirectory: s.RootDirectory,
// ConfigFile: ""
// ManifestURL: ""
FileCheckFrequency: s.FileCheckFrequency,
// HTTPCheckFrequency
PodInfraContainerImage: s.PodInfraContainerImage,
SyncFrequency: s.SyncFrequency,
RegistryPullQPS: s.RegistryPullQPS,
RegistryBurst: s.RegistryBurst,
MinimumGCAge: s.MinimumGCAge,
MaxPerPodContainerCount: s.MaxPerPodContainerCount,
MaxContainerCount: s.MaxContainerCount,
RegisterNode: s.RegisterNode,
// StandaloneMode: false
ClusterDomain: s.ClusterDomain,
ClusterDNS: s.ClusterDNS,
Runonce: s.RunOnce,
Port: s.Port,
ReadOnlyPort: s.ReadOnlyPort,
CadvisorInterface: cadvisorInterface,
EnableServer: s.EnableServer,
EnableDebuggingHandlers: s.EnableDebuggingHandlers,
DockerClient: dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
QingClient: apiclient,
MasterServiceNamespace: s.MasterServiceNamespace,
VolumePlugins: app.ProbeVolumePlugins(),
NetworkPlugins: app.ProbeNetworkPlugins(),
NetworkPluginName: s.NetworkPluginName,
StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
TLSOptions: tlsOptions,
ImageGCPolicy: imageGCPolicy,
DiskSpacePolicy: diskSpacePolicy,
Cloud: nil, // TODO(jdef) Cloud, specifying null here because we don't want all qinglets polling mesos-master; need to account for this in the cloudprovider impl
NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
ResourceContainer: s.ResourceContainer,
CgroupRoot: s.CgroupRoot,
ContainerRuntime: s.ContainerRuntime,
Mounter: mounter,
DockerDaemonContainer: s.DockerDaemonContainer,
SystemContainer: s.SystemContainer,
ConfigureCBR0: s.ConfigureCBR0,
MaxPods: s.MaxPods,
DockerExecHandler: dockerExecHandler,
}
kcfg.NodeName = kcfg.Hostname
err = app.RunQinglet(&kcfg, app.QingletBuilder(func(kc *app.QingletConfig) (app.QingletBootstrap, *kconfig.PodConfig, error) {
return s.createAndInitQinglet(kc, hks, clientConfig, shutdownCloser)
}))
if err != nil {
return err
}
if s.HealthzPort > 0 {
healthz.DefaultHealthz()
go util.Forever(func() {
err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress.String(), strconv.Itoa(s.HealthzPort)), nil)
if err != nil {
log.Errorf("Starting health server failed: %v", err)
}
}, 5*time.Second)
}
// block until executor is shut down or commits shutdown
select {}
}
// Run runs the specified QingletServer. This should never exit.
func (s *QingletServer) Run(_ []string) error {
util.ReallyCrash = s.ReallyCrashForTesting
rand.Seed(time.Now().UTC().UnixNano())
// TODO(vmarmol): Do this through container config.
if err := util.ApplyOomScoreAdj(0, s.OOMScoreAdj); err != nil {
glog.Warning(err)
}
var apiclient *client.Client
clientConfig, err := s.CreateAPIServerClientConfig()
if err == nil {
apiclient, err = client.New(clientConfig)
}
if err != nil && len(s.APIServerList) > 0 {
glog.Warningf("No API client: %v", err)
}
glog.V(2).Infof("Using root directory: %v", s.RootDirectory)
credentialprovider.SetPreferredDockercfgPath(s.RootDirectory)
cadvisorInterface, err := cadvisor.New(s.CadvisorPort)
if err != nil {
return err
}
imageGCPolicy := qinglet.ImageGCPolicy{
HighThresholdPercent: s.ImageGCHighThresholdPercent,
LowThresholdPercent: s.ImageGCLowThresholdPercent,
}
diskSpacePolicy := qinglet.DiskSpacePolicy{
DockerFreeDiskMB: s.LowDiskSpaceThresholdMB,
RootFreeDiskMB: s.LowDiskSpaceThresholdMB,
}
cloud := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
hostNetworkSources, err := qinglet.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
if err != nil {
return err
}
tlsOptions, err := s.InitializeTLS()
if err != nil {
return err
}
mounter := mount.New()
if s.Containerized {
glog.V(2).Info("Running qinglet in containerized mode (experimental)")
mounter = &mount.NsenterMounter{}
}
var dockerExecHandler dockertools.ExecHandler
switch s.DockerExecHandlerName {
case "native":
dockerExecHandler = &dockertools.NativeExecHandler{}
case "nsenter":
dockerExecHandler = &dockertools.NsenterExecHandler{}
default:
glog.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandlerName)
dockerExecHandler = &dockertools.NativeExecHandler{}
}
kcfg := QingletConfig{
Address: s.Address,
AllowPrivileged: s.AllowPrivileged,
HostNetworkSources: hostNetworkSources,
HostnameOverride: s.HostnameOverride,
RootDirectory: s.RootDirectory,
ConfigFile: s.Config,
ManifestURL: s.ManifestURL,
FileCheckFrequency: s.FileCheckFrequency,
HTTPCheckFrequency: s.HTTPCheckFrequency,
PodInfraContainerImage: s.PodInfraContainerImage,
SyncFrequency: s.SyncFrequency,
RegistryPullQPS: s.RegistryPullQPS,
RegistryBurst: s.RegistryBurst,
MinimumGCAge: s.MinimumGCAge,
MaxPerPodContainerCount: s.MaxPerPodContainerCount,
MaxContainerCount: s.MaxContainerCount,
RegisterNode: s.RegisterNode,
StandaloneMode: (len(s.APIServerList) == 0),
ClusterDomain: s.ClusterDomain,
ClusterDNS: s.ClusterDNS,
Runonce: s.RunOnce,
Port: s.Port,
ReadOnlyPort: s.ReadOnlyPort,
CadvisorInterface: cadvisorInterface,
EnableServer: s.EnableServer,
EnableDebuggingHandlers: s.EnableDebuggingHandlers,
DockerClient: dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
QingClient: apiclient,
MasterServiceNamespace: s.MasterServiceNamespace,
VolumePlugins: ProbeVolumePlugins(),
NetworkPlugins: ProbeNetworkPlugins(),
NetworkPluginName: s.NetworkPluginName,
StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
TLSOptions: tlsOptions,
ImageGCPolicy: imageGCPolicy,
DiskSpacePolicy: diskSpacePolicy,
Cloud: cloud,
NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
ResourceContainer: s.ResourceContainer,
CgroupRoot: s.CgroupRoot,
ContainerRuntime: s.ContainerRuntime,
Mounter: mounter,
DockerDaemonContainer: s.DockerDaemonContainer,
SystemContainer: s.SystemContainer,
ConfigureCBR0: s.ConfigureCBR0,
PodCIDR: s.PodCIDR,
MaxPods: s.MaxPods,
DockerExecHandler: dockerExecHandler,
}
if err := RunQinglet(&kcfg, nil); err != nil {
return err
}
if s.HealthzPort > 0 {
healthz.DefaultHealthz()
go util.Forever(func() {
err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress.String(), strconv.Itoa(s.HealthzPort)), nil)
if err != nil {
glog.Errorf("Starting health server failed: %v", err)
}
}, 5*time.Second)
}
if s.RunOnce {
return nil
}
// run forever
select {}
}