func (j *StartedContainerStateRequest) Execute(resp jobs.Response) {
unitName := j.Id.UnitNameFor()
unitPath := j.Id.UnitPathFor()
inState, tooSoon := inStateOrTooSoon(j.Id, unitName, true, false, rateLimitChanges)
if inState {
w := resp.SuccessWithWrite(jobs.ResponseAccepted, true, false)
fmt.Fprintf(w, "Container %s starting\n", j.Id)
return
}
if tooSoon {
resp.Failure(ErrStartRequestThrottled)
return
}
if errs := csystemd.SetUnitStartOnBoot(j.Id, true); errs != nil {
log.Print("alter_container_state: Unable to persist whether the unit is started on boot: ", errs)
resp.Failure(ErrContainerStartFailed)
return
}
if err := systemd.EnableAndReloadUnit(systemd.Connection(), unitName, unitPath); err != nil {
if systemd.IsNoSuchUnit(err) || systemd.IsFileNotFound(err) {
resp.Failure(ErrContainerNotFound)
return
}
log.Printf("alter_container_state: Could not enable container %s: %v", unitName, err)
resp.Failure(ErrContainerStartFailed)
return
}
if err := systemd.Connection().StartUnitJob(unitName, "replace"); err != nil {
log.Printf("alter_container_state: Could not start container %s: %v", unitName, err)
resp.Failure(ErrContainerStartFailed)
return
}
w := resp.SuccessWithWrite(jobs.ResponseAccepted, true, false)
fmt.Fprintf(w, "Container %s starting\n", j.Id)
}
func (req *InstallContainerRequest) Execute(resp jobs.Response) {
id := req.Id
unitName := id.UnitNameFor()
unitPath := id.UnitPathFor()
unitVersionPath := id.VersionedUnitPathFor(req.RequestIdentifier.String())
socketUnitName := id.SocketUnitNameFor()
socketUnitPath := id.SocketUnitPathFor()
var socketActivationType string
if req.SocketActivation {
socketActivationType = "enabled"
if !req.SkipSocketProxy {
socketActivationType = "proxied"
}
}
// attempt to download the environment if it is remote
env := req.Environment
if env != nil {
if err := env.Fetch(100 * 1024); err != nil {
resp.Failure(ErrContainerCreateFailed)
return
}
if env.Empty() {
env = nil
}
}
// open and lock the base path (to prevent simultaneous updates)
state, exists, err := utils.OpenFileExclusive(unitPath, 0664)
if err != nil {
log.Print("install_container: Unable to lock unit file: ", err)
resp.Failure(ErrContainerCreateFailed)
}
defer state.Close()
// write a new file to disk that describes the new service
unit, err := utils.CreateFileExclusive(unitVersionPath, 0664)
if err != nil {
log.Print("install_container: Unable to open unit file definition: ", err)
resp.Failure(ErrContainerCreateFailed)
return
}
defer unit.Close()
// if this is an existing container, read the currently reserved ports
existingPorts := port.PortPairs{}
if exists {
existingPorts, err = containers.GetExistingPorts(id)
if err != nil {
if _, ok := err.(*os.PathError); !ok {
log.Print("install_container: Unable to read existing ports from file: ", err)
resp.Failure(ErrContainerCreateFailed)
return
}
}
}
// allocate and reserve ports for this container
reserved, erra := port.AtomicReserveExternalPorts(unitVersionPath, req.Ports, existingPorts)
if erra != nil {
log.Printf("install_container: Unable to reserve external ports: %+v", erra)
resp.Failure(ErrContainerCreateFailedPortsReserved)
return
}
if len(reserved) > 0 {
resp.WritePendingSuccess(PendingPortMappingName, reserved)
}
var portSpec string
if req.Simple && len(reserved) == 0 {
portSpec = "-P"
} else {
portSpec = dockerPortSpec(reserved)
}
// write the environment to disk
var environmentPath string
if env != nil {
if errw := env.Write(false); errw != nil {
resp.Failure(ErrContainerCreateFailed)
return
}
environmentPath = env.Id.EnvironmentPathFor()
}
// write the network links (if any) to disk
if req.NetworkLinks != nil {
if errw := req.NetworkLinks.Write(id.NetworkLinksPathFor(), false); errw != nil {
resp.Failure(ErrContainerCreateFailed)
return
}
}
slice := "container-small"
// write the definition unit file
args := csystemd.ContainerUnit{
Id: id,
Image: req.Image,
PortSpec: portSpec,
Slice: slice + ".slice",
Isolate: req.Isolate,
ReqId: req.RequestIdentifier.String(),
HomeDir: id.HomePath(),
RunDir: id.RunPathFor(),
EnvironmentPath: environmentPath,
ExecutablePath: filepath.Join("/", "usr", "bin", "gear"),
IncludePath: "",
PortPairs: reserved,
SocketUnitName: socketUnitName,
SocketActivationType: socketActivationType,
DockerFeatures: config.SystemDockerFeatures,
}
var templateName string
switch {
case req.SocketActivation:
templateName = "SOCKETACTIVATED"
case config.SystemDockerFeatures.ForegroundRun:
templateName = "FOREGROUND"
default:
templateName = "SIMPLE"
}
if erre := csystemd.ContainerUnitTemplate.ExecuteTemplate(unit, templateName, args); erre != nil {
log.Printf("install_container: Unable to output template: %+v", erre)
resp.Failure(ErrContainerCreateFailed)
defer os.Remove(unitVersionPath)
return
}
if err := unit.Close(); err != nil {
log.Printf("install_container: Unable to finish writing unit: %+v", err)
resp.Failure(ErrContainerCreateFailed)
defer os.Remove(unitVersionPath)
return
}
// swap the new definition with the old one
if err := utils.AtomicReplaceLink(unitVersionPath, unitPath); err != nil {
log.Printf("install_container: Failed to activate new unit: %+v", err)
resp.Failure(ErrContainerCreateFailed)
return
}
state.Close()
// write whether this container should be started on next boot
if req.Started {
if errs := csystemd.SetUnitStartOnBoot(id, true); errs != nil {
log.Print("install_container: Unable to write container boot link: ", err)
resp.Failure(ErrContainerCreateFailed)
return
}
}
// Generate the socket file and ignore failures
paths := []string{unitPath}
if req.SocketActivation {
if err := writeSocketUnit(socketUnitPath, &args); err == nil {
paths = []string{unitPath, socketUnitPath}
}
}
if err := systemd.EnableAndReloadUnit(systemd.Connection(), unitName, paths...); err != nil {
log.Printf("install_container: Could not enable container %s (%v): %v", unitName, paths, err)
resp.Failure(ErrContainerCreateFailed)
return
}
if req.Started {
if req.SocketActivation {
// Start the socket file, not the service and ignore failures
if err := systemd.Connection().StartUnitJob(socketUnitName, "replace"); err != nil {
log.Printf("install_container: Could not start container socket %s: %v", socketUnitName, err)
resp.Failure(ErrContainerCreateFailed)
return
}
} else {
if err := systemd.Connection().StartUnitJob(unitName, "replace"); err != nil {
log.Printf("install_container: Could not start container %s: %v", unitName, err)
resp.Failure(ErrContainerCreateFailed)
return
}
}
}
w := resp.SuccessWithWrite(jobs.ResponseAccepted, true, false)
if req.Started {
fmt.Fprintf(w, "Container %s is starting\n", id)
} else {
fmt.Fprintf(w, "Container %s is installed\n", id)
}
}
func (j *StoppedContainerStateRequest) Execute(resp jobs.Response) {
unitName := j.Id.UnitNameFor()
inState, tooSoon := inStateOrTooSoon(j.Id, unitName, false, false, rateLimitChanges)
if inState {
w := resp.SuccessWithWrite(jobs.ResponseAccepted, true, false)
fmt.Fprintf(w, "Container %s is stopped\n", j.Id)
return
}
if tooSoon {
resp.Failure(ErrStopRequestThrottled)
return
}
if errs := csystemd.SetUnitStartOnBoot(j.Id, false); errs != nil {
log.Print("alter_container_state: Unable to persist whether the unit is started on boot: ", errs)
resp.Failure(ErrContainerStopFailed)
return
}
w := resp.SuccessWithWrite(jobs.ResponseAccepted, true, false)
done := make(chan time.Time)
ioerr := make(chan error)
go func() {
ioerr <- systemd.WriteLogsTo(w, unitName, 0, done)
}()
joberr := make(chan error)
go func() {
status, err := systemd.Connection().StopUnit(unitName, "replace")
if err == nil && status != "done" {
err = errors.New(fmt.Sprintf("Job status 'done' != %s", status))
}
joberr <- err
}()
var err error
select {
case err = <-ioerr:
log.Printf("alter_container_state: Client hung up")
close(ioerr)
case err = <-joberr:
log.Printf("alter_container_state: Stop job done")
case <-time.After(15 * time.Second):
log.Printf("alter_container_state: Timeout waiting for stop completion")
}
close(done)
select {
case <-ioerr:
}
switch {
case systemd.IsNoSuchUnit(err):
if _, err := os.Stat(j.Id.UnitPathFor()); err == nil {
fmt.Fprintf(w, "Container %s is stopped\n", j.Id)
} else {
fmt.Fprintf(w, "No such container %s\n", j.Id)
}
case err != nil:
fmt.Fprintf(w, "Could not stop container: %s\n", err.Error())
default:
fmt.Fprintf(w, "Container %s is stopped\n", j.Id)
}
}
func (j *deleteContainer) Execute(resp jobs.Response) {
unitName := j.Id.UnitNameFor()
unitPath := j.Id.UnitPathFor()
unitDefinitionsPath := j.Id.VersionedUnitsPathFor()
idleFlagPath := j.Id.IdleUnitPathFor()
socketUnitPath := j.Id.SocketUnitPathFor()
homeDirPath := j.Id.BaseHomePath()
runDirPath := j.Id.RunPathFor()
networkLinksPath := j.Id.NetworkLinksPathFor()
_, err := systemd.Connection().GetUnitProperties(unitName)
switch {
case systemd.IsNoSuchUnit(err):
resp.Success(jobs.ResponseOk)
return
case err != nil:
resp.Failure(ErrDeleteContainerFailed)
return
}
if err := systemd.Connection().StopUnitJob(unitName, "fail"); err != nil {
log.Printf("delete_container: Unable to queue stop unit job: %v", err)
}
ports, err := containers.GetExistingPorts(j.Id)
if err != nil {
if !os.IsNotExist(err) {
log.Printf("delete_container: Unable to read existing port definitions: %v", err)
}
ports = port.PortPairs{}
}
if err := portReserver.ReleaseExternalPorts(ports); err != nil {
log.Printf("delete_container: Unable to release ports: %v", err)
}
if err := os.Remove(unitPath); err != nil && !os.IsNotExist(err) {
resp.Failure(ErrDeleteContainerFailed)
return
}
if err := os.Remove(idleFlagPath); err != nil && !os.IsNotExist(err) {
resp.Failure(ErrDeleteContainerFailed)
return
}
if err := csystemd.SetUnitStartOnBoot(j.Id, false); err != nil {
log.Printf("delete_container: Unable to clear unit boot state: %v", err)
}
if err := os.Remove(socketUnitPath); err != nil && !os.IsNotExist(err) {
log.Printf("delete_container: Unable to remove socket unit path: %v", err)
}
if err := os.Remove(networkLinksPath); err != nil && !os.IsNotExist(err) {
log.Printf("delete_container: Unable to remove network links file: %v", err)
}
if err := os.RemoveAll(unitDefinitionsPath); err != nil {
log.Printf("delete_container: Unable to remove definitions for container: %v", err)
}
if err := os.RemoveAll(filepath.Dir(runDirPath)); err != nil {
log.Printf("delete_container: Unable to remove run directory: %v", err)
}
if err := os.RemoveAll(filepath.Dir(homeDirPath)); err != nil {
log.Printf("delete_container: Unable to remove home directory: %v", err)
}
if _, err := systemd.Connection().DisableUnitFiles([]string{unitPath, socketUnitPath}, false); err != nil {
log.Printf("delete_container: Some units have not been disabled: %v", err)
}
if err := systemd.Connection().Reload(); err != nil {
log.Printf("delete_container: Some units have not been disabled: %v", err)
}
resp.Success(jobs.ResponseOk)
}