func (s *DockerServer) serviceCreate(w http.ResponseWriter, r *http.Request) {
var config swarm.ServiceSpec
defer r.Body.Close()
err := json.NewDecoder(r.Body).Decode(&config)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
s.cMut.Lock()
defer s.cMut.Unlock()
s.swarmMut.Lock()
defer s.swarmMut.Unlock()
if len(s.nodes) == 0 || s.swarm == nil {
http.Error(w, "no swarm nodes available", http.StatusNotAcceptable)
return
}
if config.Name == "" {
config.Name = s.generateID()
}
for _, s := range s.services {
if s.Spec.Name == config.Name {
http.Error(w, "there's already a service with this name", http.StatusConflict)
return
}
}
service := swarm.Service{
ID: s.generateID(),
Spec: config,
}
containerCount := 1
if service.Spec.Mode.Global != nil {
containerCount = len(s.nodes)
} else if repl := service.Spec.Mode.Replicated; repl != nil {
if repl.Replicas != nil {
containerCount = int(*repl.Replicas)
}
}
for i := 0; i < containerCount; i++ {
container := s.containerForService(&service, fmt.Sprintf("%s-%d", config.Name, i))
chosenNode := s.nodes[s.nodeRR]
s.nodeRR = (s.nodeRR + 1) % len(s.nodes)
task := swarm.Task{
ID: s.generateID(),
ServiceID: service.ID,
NodeID: chosenNode.ID,
Status: swarm.TaskStatus{
State: swarm.TaskStateReady,
ContainerStatus: swarm.ContainerStatus{
ContainerID: container.ID,
},
},
DesiredState: swarm.TaskStateReady,
Spec: config.TaskTemplate,
}
s.tasks = append(s.tasks, &task)
s.containers = append(s.containers, container)
s.notify(container)
}
s.services = append(s.services, &service)
w.WriteHeader(http.StatusOK)
json.NewEncoder(w).Encode(service)
}
func mergeService(spec *swarm.ServiceSpec, flags *pflag.FlagSet) error {
mergeString := func(flag string, field *string) {
if flags.Changed(flag) {
*field, _ = flags.GetString(flag)
}
}
mergeListOpts := func(flag string, field *[]string) {
if flags.Changed(flag) {
value := flags.Lookup(flag).Value.(*opts.ListOpts)
*field = value.GetAll()
}
}
mergeSlice := func(flag string, field *[]string) {
if flags.Changed(flag) {
*field, _ = flags.GetStringSlice(flag)
}
}
mergeInt64Value := func(flag string, field *int64) {
if flags.Changed(flag) {
*field = flags.Lookup(flag).Value.(int64Value).Value()
}
}
mergeDuration := func(flag string, field *time.Duration) {
if flags.Changed(flag) {
*field, _ = flags.GetDuration(flag)
}
}
mergeDurationOpt := func(flag string, field *time.Duration) {
if flags.Changed(flag) {
*field = *flags.Lookup(flag).Value.(*DurationOpt).Value()
}
}
mergeUint64 := func(flag string, field *uint64) {
if flags.Changed(flag) {
*field, _ = flags.GetUint64(flag)
}
}
mergeUint64Opt := func(flag string, field *uint64) {
if flags.Changed(flag) {
*field = *flags.Lookup(flag).Value.(*Uint64Opt).Value()
}
}
cspec := &spec.TaskTemplate.ContainerSpec
task := &spec.TaskTemplate
mergeString(flagName, &spec.Name)
mergeLabels(flags, &spec.Labels)
mergeString("image", &cspec.Image)
mergeSlice("command", &cspec.Command)
mergeSlice("arg", &cspec.Command)
mergeListOpts("env", &cspec.Env)
mergeString("workdir", &cspec.Dir)
mergeString("user", &cspec.User)
mergeMounts(flags, &cspec.Mounts)
if flags.Changed(flagLimitCPU) || flags.Changed(flagLimitMemory) {
if task.Resources == nil {
task.Resources = &swarm.ResourceRequirements{}
}
task.Resources.Limits = &swarm.Resources{}
mergeInt64Value(flagLimitCPU, &task.Resources.Limits.NanoCPUs)
mergeInt64Value(flagLimitMemory, &task.Resources.Limits.MemoryBytes)
}
if flags.Changed(flagReserveCPU) || flags.Changed(flagReserveMemory) {
if task.Resources == nil {
task.Resources = &swarm.ResourceRequirements{}
}
task.Resources.Reservations = &swarm.Resources{}
mergeInt64Value(flagReserveCPU, &task.Resources.Reservations.NanoCPUs)
mergeInt64Value(flagReserveMemory, &task.Resources.Reservations.MemoryBytes)
}
mergeDurationOpt("stop-grace-period", cspec.StopGracePeriod)
if flags.Changed(flagRestartCondition) || flags.Changed(flagRestartDelay) || flags.Changed(flagRestartMaxAttempts) || flags.Changed(flagRestartWindow) {
if task.RestartPolicy == nil {
task.RestartPolicy = &swarm.RestartPolicy{}
}
if flags.Changed(flagRestartCondition) {
value, _ := flags.GetString(flagRestartCondition)
task.RestartPolicy.Condition = swarm.RestartPolicyCondition(value)
}
mergeDurationOpt(flagRestartDelay, task.RestartPolicy.Delay)
mergeUint64Opt(flagRestartMaxAttempts, task.RestartPolicy.MaxAttempts)
mergeDurationOpt((flagRestartWindow), task.RestartPolicy.Window)
}
if flags.Changed(flagConstraint) {
task.Placement = &swarm.Placement{}
mergeSlice(flagConstraint, &task.Placement.Constraints)
}
if err := mergeMode(flags, &spec.Mode); err != nil {
return err
}
if flags.Changed(flagUpdateParallelism) || flags.Changed(flagUpdateDelay) {
if spec.UpdateConfig == nil {
spec.UpdateConfig = &swarm.UpdateConfig{}
}
mergeUint64(flagUpdateParallelism, &spec.UpdateConfig.Parallelism)
mergeDuration(flagUpdateDelay, &spec.UpdateConfig.Delay)
}
mergeNetworks(flags, &spec.Networks)
if flags.Changed(flagEndpointMode) {
value, _ := flags.GetString(flagEndpointMode)
spec.EndpointSpec.Mode = swarm.ResolutionMode(value)
}
if flags.Changed(flagPublish) {
if spec.EndpointSpec == nil {
spec.EndpointSpec = &swarm.EndpointSpec{}
}
mergePorts(flags, &spec.EndpointSpec.Ports)
}
return nil
}
func updateService(flags *pflag.FlagSet, spec *swarm.ServiceSpec) error {
updateString := func(flag string, field *string) {
if flags.Changed(flag) {
*field, _ = flags.GetString(flag)
}
}
updateInt64Value := func(flag string, field *int64) {
if flags.Changed(flag) {
*field = flags.Lookup(flag).Value.(int64Value).Value()
}
}
updateDuration := func(flag string, field *time.Duration) {
if flags.Changed(flag) {
*field, _ = flags.GetDuration(flag)
}
}
updateDurationOpt := func(flag string, field *time.Duration) {
if flags.Changed(flag) {
*field = *flags.Lookup(flag).Value.(*DurationOpt).Value()
}
}
updateUint64 := func(flag string, field *uint64) {
if flags.Changed(flag) {
*field, _ = flags.GetUint64(flag)
}
}
updateUint64Opt := func(flag string, field *uint64) {
if flags.Changed(flag) {
*field = *flags.Lookup(flag).Value.(*Uint64Opt).Value()
}
}
cspec := &spec.TaskTemplate.ContainerSpec
task := &spec.TaskTemplate
taskResources := func() *swarm.ResourceRequirements {
if task.Resources == nil {
task.Resources = &swarm.ResourceRequirements{}
}
return task.Resources
}
updateString(flagName, &spec.Name)
updateLabels(flags, &spec.Labels)
updateString("image", &cspec.Image)
updateStringToSlice(flags, "args", &cspec.Args)
updateEnvironment(flags, &cspec.Env)
updateString("workdir", &cspec.Dir)
updateString(flagUser, &cspec.User)
updateMounts(flags, &cspec.Mounts)
if flags.Changed(flagLimitCPU) || flags.Changed(flagLimitMemory) {
taskResources().Limits = &swarm.Resources{}
updateInt64Value(flagLimitCPU, &task.Resources.Limits.NanoCPUs)
updateInt64Value(flagLimitMemory, &task.Resources.Limits.MemoryBytes)
}
if flags.Changed(flagReserveCPU) || flags.Changed(flagReserveMemory) {
taskResources().Reservations = &swarm.Resources{}
updateInt64Value(flagReserveCPU, &task.Resources.Reservations.NanoCPUs)
updateInt64Value(flagReserveMemory, &task.Resources.Reservations.MemoryBytes)
}
updateDurationOpt(flagStopGracePeriod, cspec.StopGracePeriod)
if anyChanged(flags, flagRestartCondition, flagRestartDelay, flagRestartMaxAttempts, flagRestartWindow) {
if task.RestartPolicy == nil {
task.RestartPolicy = &swarm.RestartPolicy{}
}
if flags.Changed(flagRestartCondition) {
value, _ := flags.GetString(flagRestartCondition)
task.RestartPolicy.Condition = swarm.RestartPolicyCondition(value)
}
updateDurationOpt(flagRestartDelay, task.RestartPolicy.Delay)
updateUint64Opt(flagRestartMaxAttempts, task.RestartPolicy.MaxAttempts)
updateDurationOpt((flagRestartWindow), task.RestartPolicy.Window)
}
if anyChanged(flags, flagConstraintAdd, flagConstraintRemove) {
if task.Placement == nil {
task.Placement = &swarm.Placement{}
}
updatePlacement(flags, task.Placement)
}
if err := updateReplicas(flags, &spec.Mode); err != nil {
return err
}
if anyChanged(flags, flagUpdateParallelism, flagUpdateDelay, flagUpdateFailureAction) {
if spec.UpdateConfig == nil {
spec.UpdateConfig = &swarm.UpdateConfig{}
}
updateUint64(flagUpdateParallelism, &spec.UpdateConfig.Parallelism)
updateDuration(flagUpdateDelay, &spec.UpdateConfig.Delay)
updateString(flagUpdateFailureAction, &spec.UpdateConfig.FailureAction)
}
updateNetworks(flags, &spec.Networks)
if flags.Changed(flagEndpointMode) {
value, _ := flags.GetString(flagEndpointMode)
spec.EndpointSpec.Mode = swarm.ResolutionMode(value)
}
if anyChanged(flags, flagPublishAdd, flagPublishRemove) {
if spec.EndpointSpec == nil {
spec.EndpointSpec = &swarm.EndpointSpec{}
}
updatePorts(flags, &spec.EndpointSpec.Ports)
}
if err := updateLogDriver(flags, &spec.TaskTemplate); err != nil {
return err
}
return nil
}