// New takes a driver and returns a new manager.
func New(driver storage.StorageDriver, sysfs sysfs.SysFs) (Manager, error) {
if driver == nil {
return nil, fmt.Errorf("nil storage driver!")
}
// Detect the container we are running on.
selfContainer, err := cgroups.GetThisCgroupDir("cpu")
if err != nil {
return nil, err
}
glog.Infof("cAdvisor running in container: %q", selfContainer)
newManager := &manager{
containers: make(map[namespacedContainerName]*containerData),
quitChannels: make([]chan error, 0, 2),
storageDriver: driver,
cadvisorContainer: selfContainer,
}
machineInfo, err := getMachineInfo(sysfs)
if err != nil {
return nil, err
}
newManager.machineInfo = *machineInfo
glog.Infof("Machine: %+v", newManager.machineInfo)
versionInfo, err := getVersionInfo()
if err != nil {
return nil, err
}
newManager.versionInfo = *versionInfo
glog.Infof("Version: %+v", newManager.versionInfo)
return newManager, nil
}
// New takes a memory storage and returns a new manager.
func New(memoryCache *memory.InMemoryCache, sysfs sysfs.SysFs, maxHousekeepingInterval time.Duration, allowDynamicHousekeeping bool) (Manager, error) {
if memoryCache == nil {
return nil, fmt.Errorf("manager requires memory storage")
}
// Detect the container we are running on.
selfContainer, err := cgroups.GetThisCgroupDir("cpu")
if err != nil {
return nil, err
}
glog.Infof("cAdvisor running in container: %q", selfContainer)
dockerInfo, err := docker.DockerInfo()
if err != nil {
glog.Warningf("Unable to connect to Docker: %v", err)
}
context := fs.Context{DockerRoot: docker.RootDir(), DockerInfo: dockerInfo}
fsInfo, err := fs.NewFsInfo(context)
if err != nil {
return nil, err
}
// If cAdvisor was started with host's rootfs mounted, assume that its running
// in its own namespaces.
inHostNamespace := false
if _, err := os.Stat("/rootfs/proc"); os.IsNotExist(err) {
inHostNamespace = true
}
newManager := &manager{
containers: make(map[namespacedContainerName]*containerData),
quitChannels: make([]chan error, 0, 2),
memoryCache: memoryCache,
fsInfo: fsInfo,
cadvisorContainer: selfContainer,
inHostNamespace: inHostNamespace,
startupTime: time.Now(),
maxHousekeepingInterval: maxHousekeepingInterval,
allowDynamicHousekeeping: allowDynamicHousekeeping,
}
machineInfo, err := getMachineInfo(sysfs, fsInfo)
if err != nil {
return nil, err
}
newManager.machineInfo = *machineInfo
glog.Infof("Machine: %+v", newManager.machineInfo)
versionInfo, err := getVersionInfo()
if err != nil {
return nil, err
}
glog.Infof("Version: %+v", *versionInfo)
newManager.eventHandler = events.NewEventManager(parseEventsStoragePolicy())
return newManager, nil
}
// New takes a memory storage and returns a new manager.
func New(memoryStorage *memory.InMemoryStorage, sysfs sysfs.SysFs) (Manager, error) {
if memoryStorage == nil {
return nil, fmt.Errorf("manager requires memory storage")
}
// Detect the container we are running on.
selfContainer, err := cgroups.GetThisCgroupDir("cpu")
if err != nil {
return nil, err
}
glog.Infof("cAdvisor running in container: %q", selfContainer)
context := fs.Context{DockerRoot: docker.RootDir()}
fsInfo, err := fs.NewFsInfo(context)
if err != nil {
return nil, err
}
newManager := &manager{
containers: make(map[namespacedContainerName]*containerData),
quitChannels: make([]chan error, 0, 2),
memoryStorage: memoryStorage,
fsInfo: fsInfo,
cadvisorContainer: selfContainer,
startupTime: time.Now(),
}
machineInfo, err := getMachineInfo(sysfs, fsInfo)
if err != nil {
return nil, err
}
newManager.machineInfo = *machineInfo
glog.Infof("Machine: %+v", newManager.machineInfo)
versionInfo, err := getVersionInfo()
if err != nil {
return nil, err
}
newManager.versionInfo = *versionInfo
glog.Infof("Version: %+v", newManager.versionInfo)
newManager.eventHandler = events.NewEventManager()
// Register Docker container factory.
err = docker.Register(newManager, fsInfo)
if err != nil {
glog.Errorf("Docker container factory registration failed: %v.", err)
}
// Register the raw driver.
err = raw.Register(newManager, fsInfo)
if err != nil {
glog.Errorf("Registration of the raw container factory failed: %v", err)
}
return newManager, nil
}
func findCgroupRootAndDir(subsystem string) (string, string, error) {
cgroupRoot, err := cgroups.FindCgroupMountpoint(subsystem)
if err != nil {
return "", "", err
}
cgroupDir, err := cgroups.GetThisCgroupDir(subsystem)
if err != nil {
return "", "", err
}
return cgroupRoot, cgroupDir, nil
}
func (d *driver) GetPidsForContainer(id string) ([]int, error) {
pids := []int{}
// cpu is chosen because it is the only non optional subsystem in cgroups
subsystem := "cpu"
cgroupRoot, err := cgroups.FindCgroupMountpoint(subsystem)
if err != nil {
return pids, err
}
cgroupDir, err := cgroups.GetThisCgroupDir(subsystem)
if err != nil {
return pids, err
}
filename := filepath.Join(cgroupRoot, cgroupDir, id, "tasks")
if _, err := os.Stat(filename); os.IsNotExist(err) {
// With more recent lxc versions use, cgroup will be in lxc/
filename = filepath.Join(cgroupRoot, cgroupDir, "lxc", id, "tasks")
}
output, err := ioutil.ReadFile(filename)
if err != nil {
return pids, err
}
for _, p := range strings.Split(string(output), "\n") {
if len(p) == 0 {
continue
}
pid, err := strconv.Atoi(p)
if err != nil {
return pids, fmt.Errorf("Invalid pid '%s': %s", p, err)
}
pids = append(pids, pid)
}
return pids, nil
}
func detectDockerContainer() (string, error) {
return cgroups.GetThisCgroupDir("cpu")
}
