func (s *DirectorySuite) TestRemoveContainerDir(c *gc.C) {
dir, err := container.NewDirectory("testing")
c.Assert(err, gc.IsNil)
err = container.RemoveDirectory("testing")
c.Assert(err, gc.IsNil)
c.Assert(dir, jc.DoesNotExist)
c.Assert(filepath.Join(s.removedDir, "testing"), jc.IsDirectory)
}
func (s *DirectorySuite) TestRemoveContainerDirWithClash(c *gc.C) {
dir, err := container.NewDirectory("testing")
c.Assert(err, gc.IsNil)
clash := filepath.Join(s.removedDir, "testing")
err = os.MkdirAll(clash, 0755)
c.Assert(err, gc.IsNil)
err = container.RemoveDirectory("testing")
c.Assert(err, gc.IsNil)
c.Assert(dir, jc.DoesNotExist)
c.Assert(filepath.Join(s.removedDir, "testing.1"), jc.IsDirectory)
}
func (manager *containerManager) CreateContainer(
machineConfig *cloudinit.MachineConfig,
series string,
network *container.NetworkConfig) (instance.Instance, *instance.HardwareCharacteristics, error) {
name := names.MachineTag(machineConfig.MachineId)
if manager.name != "" {
name = fmt.Sprintf("%s-%s", manager.name, name)
}
// Note here that the kvmObjectFacotry only returns a valid container
// object, and doesn't actually construct the underlying kvm container on
// disk.
kvmContainer := KvmObjectFactory.New(name)
// Create the cloud-init.
directory, err := container.NewDirectory(name)
if err != nil {
return nil, nil, fmt.Errorf("failed to create container directory: %v", err)
}
logger.Tracef("write cloud-init")
userDataFilename, err := container.WriteUserData(machineConfig, directory)
if err != nil {
return nil, nil, errors.LoggedErrorf(logger, "failed to write user data: %v", err)
}
// Create the container.
startParams := ParseConstraintsToStartParams(machineConfig.Constraints)
startParams.Arch = version.Current.Arch
startParams.Series = series
startParams.Network = network
startParams.UserDataFile = userDataFilename
var hardware instance.HardwareCharacteristics
hardware, err = instance.ParseHardware(
fmt.Sprintf("arch=%s mem=%vM root-disk=%vG cpu-cores=%v",
startParams.Arch, startParams.Memory, startParams.RootDisk, startParams.CpuCores))
if err != nil {
logger.Warningf("failed to parse hardware: %v", err)
}
logger.Tracef("create the container, constraints: %v", machineConfig.Constraints)
if err := kvmContainer.Start(startParams); err != nil {
return nil, nil, errors.LoggedErrorf(logger, "kvm container creation failed: %v", err)
}
logger.Tracef("kvm container created")
return &kvmInstance{kvmContainer, name}, &hardware, nil
}
// Make sure a template exists that we can clone from.
func EnsureCloneTemplate(
backingFilesystem string,
series string,
network *container.NetworkConfig,
authorizedKeys string,
aptProxy osenv.ProxySettings,
) (golxc.Container, error) {
name := fmt.Sprintf("juju-%s-template", series)
containerDirectory, err := container.NewDirectory(name)
if err != nil {
return nil, err
}
lock, err := AcquireTemplateLock(name, "ensure clone exists")
if err != nil {
return nil, err
}
defer lock.Unlock()
lxcContainer := LxcObjectFactory.New(name)
// Early exit if the container has been constructed before.
if lxcContainer.IsConstructed() {
logger.Infof("template exists, continuing")
return lxcContainer, nil
}
logger.Infof("template does not exist, creating")
userData, err := templateUserData(series, authorizedKeys, aptProxy)
if err != nil {
logger.Tracef("failed to create template user data for template: %v", err)
return nil, err
}
userDataFilename, err := container.WriteCloudInitFile(containerDirectory, userData)
if err != nil {
return nil, err
}
configFile, err := writeLxcConfig(network, containerDirectory)
if err != nil {
logger.Errorf("failed to write config file: %v", err)
return nil, err
}
templateParams := []string{
"--debug", // Debug errors in the cloud image
"--userdata", userDataFilename, // Our groovey cloud-init
"--hostid", name, // Use the container name as the hostid
"-r", series,
}
var extraCreateArgs []string
if backingFilesystem == Btrfs {
extraCreateArgs = append(extraCreateArgs, "-B", Btrfs)
}
// Create the container.
logger.Tracef("create the container")
if err := lxcContainer.Create(configFile, defaultTemplate, extraCreateArgs, templateParams); err != nil {
logger.Errorf("lxc container creation failed: %v", err)
return nil, err
}
// Make sure that the mount dir has been created.
logger.Tracef("make the mount dir for the shared logs")
if err := os.MkdirAll(internalLogDir(name), 0755); err != nil {
logger.Tracef("failed to create internal /var/log/juju mount dir: %v", err)
return nil, err
}
// Start the lxc container with the appropriate settings for grabbing the
// console output and a log file.
consoleFile := filepath.Join(containerDirectory, "console.log")
lxcContainer.SetLogFile(filepath.Join(containerDirectory, "container.log"), golxc.LogDebug)
logger.Tracef("start the container")
// We explicitly don't pass through the config file to the container.Start
// method as we have passed it through at container creation time. This
// is necessary to get the appropriate rootfs reference without explicitly
// setting it ourselves.
if err = lxcContainer.Start("", consoleFile); err != nil {
logger.Errorf("container failed to start: %v", err)
return nil, err
}
logger.Infof("template container started, now wait for it to stop")
// Perhaps we should wait for it to finish, and the question becomes "how
// long do we wait for it to complete?"
console, err := os.Open(consoleFile)
if err != nil {
// can't listen
return nil, err
}
tailWriter := &logTail{tick: time.Now()}
consoleTailer := tailer.NewTailer(console, tailWriter, nil)
defer consoleTailer.Stop()
// We should wait maybe 1 minute between output?
// if no output check to see if stopped
// If we have no output and still running, something has probably gone wrong
for lxcContainer.IsRunning() {
if tailWriter.lastTick().Before(time.Now().Add(-TemplateStopTimeout)) {
logger.Infof("not heard anything from the template log for five minutes")
return nil, fmt.Errorf("template container %q did not stop", name)
}
time.Sleep(time.Second)
}
return lxcContainer, nil
}
func (*DirectorySuite) TestNewContainerDir(c *gc.C) {
dir, err := container.NewDirectory("testing")
c.Assert(err, gc.IsNil)
c.Assert(dir, jc.IsDirectory)
}
func (manager *containerManager) CreateContainer(
machineConfig *cloudinit.MachineConfig,
series string,
network *container.NetworkConfig,
) (instance.Instance, *instance.HardwareCharacteristics, error) {
start := time.Now()
name := names.MachineTag(machineConfig.MachineId)
if manager.name != "" {
name = fmt.Sprintf("%s-%s", manager.name, name)
}
// Create the cloud-init.
directory, err := container.NewDirectory(name)
if err != nil {
return nil, nil, err
}
logger.Tracef("write cloud-init")
if manager.createWithClone {
// If we are using clone, disable the apt-get steps
machineConfig.DisablePackageCommands = true
}
userDataFilename, err := container.WriteUserData(machineConfig, directory)
if err != nil {
logger.Errorf("failed to write user data: %v", err)
return nil, nil, err
}
logger.Tracef("write the lxc.conf file")
configFile, err := writeLxcConfig(network, directory)
if err != nil {
logger.Errorf("failed to write config file: %v", err)
return nil, nil, err
}
var lxcContainer golxc.Container
if manager.createWithClone {
templateContainer, err := EnsureCloneTemplate(
manager.backingFilesystem,
series,
network,
machineConfig.AuthorizedKeys,
machineConfig.AptProxySettings,
)
if err != nil {
return nil, nil, err
}
templateParams := []string{
"--debug", // Debug errors in the cloud image
"--userdata", userDataFilename, // Our groovey cloud-init
"--hostid", name, // Use the container name as the hostid
}
var extraCloneArgs []string
if manager.backingFilesystem == Btrfs || manager.useAUFS {
extraCloneArgs = append(extraCloneArgs, "--snapshot")
}
if manager.backingFilesystem != Btrfs && manager.useAUFS {
extraCloneArgs = append(extraCloneArgs, "--backingstore", "aufs")
}
lock, err := AcquireTemplateLock(templateContainer.Name(), "clone")
if err != nil {
return nil, nil, fmt.Errorf("failed to acquire lock on template: %v", err)
}
defer lock.Unlock()
lxcContainer, err = templateContainer.Clone(name, extraCloneArgs, templateParams)
if err != nil {
logger.Errorf("lxc container cloning failed: %v", err)
return nil, nil, err
}
} else {
// Note here that the lxcObjectFacotry only returns a valid container
// object, and doesn't actually construct the underlying lxc container on
// disk.
lxcContainer = LxcObjectFactory.New(name)
templateParams := []string{
"--debug", // Debug errors in the cloud image
"--userdata", userDataFilename, // Our groovey cloud-init
"--hostid", name, // Use the container name as the hostid
"-r", series,
}
// Create the container.
logger.Tracef("create the container")
if err := lxcContainer.Create(configFile, defaultTemplate, nil, templateParams); err != nil {
logger.Errorf("lxc container creation failed: %v", err)
return nil, nil, err
}
logger.Tracef("lxc container created")
}
if err := autostartContainer(name); err != nil {
return nil, nil, err
}
if err := mountHostLogDir(name, manager.logdir); err != nil {
return nil, nil, err
}
// Start the lxc container with the appropriate settings for grabbing the
// console output and a log file.
consoleFile := filepath.Join(directory, "console.log")
lxcContainer.SetLogFile(filepath.Join(directory, "container.log"), golxc.LogDebug)
logger.Tracef("start the container")
// We explicitly don't pass through the config file to the container.Start
// method as we have passed it through at container creation time. This
// is necessary to get the appropriate rootfs reference without explicitly
// setting it ourselves.
if err = lxcContainer.Start("", consoleFile); err != nil {
logger.Errorf("container failed to start: %v", err)
return nil, nil, err
}
arch := version.Current.Arch
hardware := &instance.HardwareCharacteristics{
Arch: &arch,
}
logger.Tracef("container %q started: %v", name, time.Now().Sub(start))
return &lxcInstance{lxcContainer, name}, hardware, nil
}