func (self *rawContainerHandler) GetSpec() (info.ContainerSpec, error) {
const hasNetwork = false
hasFilesystem := isRootCgroup(self.name) || len(self.externalMounts) > 0
spec, err := common.GetSpec(self.cgroupPaths, self.machineInfoFactory, hasNetwork, hasFilesystem)
if err != nil {
return spec, err
}
if isRootCgroup(self.name) {
// Check physical network devices for root container.
nd, err := self.GetRootNetworkDevices()
if err != nil {
return spec, err
}
spec.HasNetwork = spec.HasNetwork || len(nd) != 0
// Get memory and swap limits of the running machine
memLimit, err := machine.GetMachineMemoryCapacity()
if err != nil {
glog.Warningf("failed to obtain memory limit for machine container")
spec.HasMemory = false
} else {
spec.Memory.Limit = uint64(memLimit)
// Spec is marked to have memory only if the memory limit is set
spec.HasMemory = true
}
swapLimit, err := machine.GetMachineSwapCapacity()
if err != nil {
glog.Warningf("failed to obtain swap limit for machine container")
} else {
spec.Memory.SwapLimit = uint64(swapLimit)
}
}
return spec, nil
}
func (self *rawContainerHandler) GetSpec() (info.ContainerSpec, error) {
var spec info.ContainerSpec
// The raw driver assumes unified hierarchy containers.
// Get the lowest creation time from all hierarchies as the container creation time.
now := time.Now()
lowestTime := now
for _, cgroupPath := range self.cgroupPaths {
// The modified time of the cgroup directory changes whenever a subcontainer is created.
// eg. /docker will have creation time matching the creation of latest docker container.
// Use clone_children as a workaround as it isn't usually modified. It is only likely changed
// immediately after creating a container.
cgroupPath = path.Join(cgroupPath, "cgroup.clone_children")
fi, err := os.Stat(cgroupPath)
if err == nil && fi.ModTime().Before(lowestTime) {
lowestTime = fi.ModTime()
}
}
if lowestTime != now {
spec.CreationTime = lowestTime
}
// Get machine info.
mi, err := self.machineInfoFactory.GetMachineInfo()
if err != nil {
return spec, err
}
// CPU.
cpuRoot, ok := self.cgroupPaths["cpu"]
if ok {
if utils.FileExists(cpuRoot) {
spec.HasCpu = true
spec.Cpu.Limit = readInt64(cpuRoot, "cpu.shares")
}
}
// Cpu Mask.
// This will fail for non-unified hierarchies. We'll return the whole machine mask in that case.
cpusetRoot, ok := self.cgroupPaths["cpuset"]
if ok {
if utils.FileExists(cpusetRoot) {
spec.HasCpu = true
mask := readString(cpusetRoot, "cpuset.cpus")
spec.Cpu.Mask = utils.FixCpuMask(mask, mi.NumCores)
}
}
// Memory
if self.name == "/" {
// Get memory and swap limits of the running machine
memLimit, err := machine.GetMachineMemoryCapacity()
if err != nil {
glog.Warningf("failed to obtain memory limit for machine container")
spec.HasMemory = false
} else {
spec.Memory.Limit = uint64(memLimit)
// Spec is marked to have memory only if the memory limit is set
spec.HasMemory = true
}
swapLimit, err := machine.GetMachineSwapCapacity()
if err != nil {
glog.Warningf("failed to obtain swap limit for machine container")
} else {
spec.Memory.SwapLimit = uint64(swapLimit)
}
} else {
memoryRoot, ok := self.cgroupPaths["memory"]
if ok {
if utils.FileExists(memoryRoot) {
spec.HasMemory = true
spec.Memory.Limit = readInt64(memoryRoot, "memory.limit_in_bytes")
spec.Memory.SwapLimit = readInt64(memoryRoot, "memory.memsw.limit_in_bytes")
}
}
}
// Fs.
if self.name == "/" || self.externalMounts != nil {
spec.HasFilesystem = true
}
//Network
spec.HasNetwork = self.hasNetwork
// DiskIo.
if blkioRoot, ok := self.cgroupPaths["blkio"]; ok && utils.FileExists(blkioRoot) {
spec.HasDiskIo = true
}
// Check physical network devices for root container.
nd, err := self.GetRootNetworkDevices()
if err != nil {
return spec, err
}
if len(nd) != 0 {
spec.HasNetwork = true
}
return spec, nil
}
func GetSpec(handler AbstractContainerHandler) (info.ContainerSpec, error) {
cgroupPaths := handler.GetCgroupPaths()
machineInfoFactory := handler.GetMachineInfoFactory()
name := handler.GetName()
externalMounts := handler.GetExternalMounts()
var spec info.ContainerSpec
// The raw driver assumes unified hierarchy containers.
// Get the lowest creation time from all hierarchies as the container creation time.
now := time.Now()
lowestTime := now
for _, cgroupPath := range cgroupPaths {
// The modified time of the cgroup directory changes whenever a subcontainer is created.
// eg. /docker will have creation time matching the creation of latest docker container.
// Use clone_children as a workaround as it isn't usually modified. It is only likely changed
// immediately after creating a container.
cgroupPath = path.Join(cgroupPath, "cgroup.clone_children")
fi, err := os.Stat(cgroupPath)
if err == nil && fi.ModTime().Before(lowestTime) {
lowestTime = fi.ModTime()
}
}
if lowestTime != now {
spec.CreationTime = lowestTime
}
// Get machine info.
mi, err := machineInfoFactory.GetMachineInfo()
if err != nil {
return spec, err
}
// CPU.
cpuRoot, ok := cgroupPaths["cpu"]
if ok {
if utils.FileExists(cpuRoot) {
spec.HasCpu = true
spec.Cpu.Limit = readUInt64(cpuRoot, "cpu.shares")
spec.Cpu.Period = readUInt64(cpuRoot, "cpu.cfs_period_us")
quota := readString(cpuRoot, "cpu.cfs_quota_us")
if quota != "" && quota != "-1" {
val, err := strconv.ParseUint(quota, 10, 64)
if err != nil {
glog.Errorf("GetSpec: Failed to parse CPUQuota from %q: %s", path.Join(cpuRoot, "cpu.cfs_quota_us"), err)
}
spec.Cpu.Quota = val
}
}
}
// Cpu Mask.
// This will fail for non-unified hierarchies. We'll return the whole machine mask in that case.
cpusetRoot, ok := cgroupPaths["cpuset"]
if ok {
if utils.FileExists(cpusetRoot) {
spec.HasCpu = true
mask := readString(cpusetRoot, "cpuset.cpus")
spec.Cpu.Mask = utils.FixCpuMask(mask, mi.NumCores)
}
}
// Memory
if name == "/" {
// Get memory and swap limits of the running machine
memLimit, err := machine.GetMachineMemoryCapacity()
if err != nil {
glog.Warningf("failed to obtain memory limit for machine container")
spec.HasMemory = false
} else {
spec.Memory.Limit = uint64(memLimit)
// Spec is marked to have memory only if the memory limit is set
spec.HasMemory = true
}
swapLimit, err := machine.GetMachineSwapCapacity()
if err != nil {
glog.Warningf("failed to obtain swap limit for machine container")
} else {
spec.Memory.SwapLimit = uint64(swapLimit)
}
} else {
memoryRoot, ok := cgroupPaths["memory"]
if ok {
if utils.FileExists(memoryRoot) {
spec.HasMemory = true
spec.Memory.Limit = readUInt64(memoryRoot, "memory.limit_in_bytes")
spec.Memory.SwapLimit = readUInt64(memoryRoot, "memory.memsw.limit_in_bytes")
}
}
}
spec.HasFilesystem = name == "/" || externalMounts != nil || handler.HasFilesystem()
spec.HasNetwork = handler.HasNetwork()
if blkioRoot, ok := cgroupPaths["blkio"]; ok && utils.FileExists(blkioRoot) {
spec.HasDiskIo = true
}
// Check physical network devices for root container.
nd, err := handler.GetRootNetworkDevices()
if err != nil {
return spec, err
}
spec.HasNetwork = spec.HasNetwork || len(nd) != 0
return spec, nil
}