// Get cgroup and networking stats of the specified container
func GetStats(cgroupManager cgroups.Manager, networkInterfaces []string) (*info.ContainerStats, error) {
cgroupStats, err := cgroupManager.GetStats()
if err != nil {
return nil, err
}
libcontainerStats := &libcontainer.Stats{
CgroupStats: cgroupStats,
}
stats := toContainerStats(libcontainerStats)
// TODO(rjnagal): Use networking stats directly from libcontainer.
stats.Network.Interfaces = make([]info.InterfaceStats, len(networkInterfaces))
for i := range networkInterfaces {
interfaceStats, err := sysinfo.GetNetworkStats(networkInterfaces[i])
if err != nil {
return stats, err
}
stats.Network.Interfaces[i] = interfaceStats
}
// For backwards compatability.
if len(networkInterfaces) > 0 {
stats.Network.InterfaceStats = stats.Network.Interfaces[0]
}
return stats, nil
}
func GetProcesses(cgroupManager cgroups.Manager) ([]int, error) {
pids, err := cgroupManager.GetPids()
if err != nil {
return nil, err
}
return pids, nil
}
// Get cgroup and networking stats of the specified container
func GetStats(cgroupManager cgroups.Manager, rootFs string, pid int) (*info.ContainerStats, error) {
cgroupStats, err := cgroupManager.GetStats()
if err != nil {
return nil, err
}
libcontainerStats := &libcontainer.Stats{
CgroupStats: cgroupStats,
}
stats := toContainerStats(libcontainerStats)
// If we know the pid then get network stats from /proc/<pid>/net/dev
if pid > 0 {
netStats, err := networkStatsFromProc(rootFs, pid)
if err != nil {
glog.V(2).Infof("Unable to get network stats from pid %d: %v", pid, err)
} else {
stats.Network.Interfaces = append(stats.Network.Interfaces, netStats...)
}
}
// For backwards compatibility.
if len(stats.Network.Interfaces) > 0 {
stats.Network.InterfaceStats = stats.Network.Interfaces[0]
}
return stats, nil
}
// killCgroupProcesses freezes then iterates over all the processes inside the
// manager's cgroups sending a SIGKILL to each process then waiting for them to
// exit.
func killCgroupProcesses(m cgroups.Manager) error {
var procs []*os.Process
if err := m.Freeze(configs.Frozen); err != nil {
log.Warn(err)
}
pids, err := m.GetPids()
if err != nil {
m.Freeze(configs.Thawed)
return err
}
for _, pid := range pids {
if p, err := os.FindProcess(pid); err == nil {
procs = append(procs, p)
if err := p.Kill(); err != nil {
log.Warn(err)
}
}
}
if err := m.Freeze(configs.Thawed); err != nil {
log.Warn(err)
}
for _, p := range procs {
if _, err := p.Wait(); err != nil {
log.Warn(err)
}
}
return nil
}
// Get cgroup and networking stats of the specified container
func GetStats(cgroupManager cgroups.Manager, networkInterfaces []string) (*info.ContainerStats, error) {
cgroupStats, err := cgroupManager.GetStats()
if err != nil {
return nil, err
}
libcontainerStats := &libcontainer.Stats{
CgroupStats: cgroupStats,
}
stats := toContainerStats(libcontainerStats)
if len(networkInterfaces) != 0 {
// ContainerStats only reports stat for one network device.
// TODO(rjnagal): Handle multiple physical network devices.
// TODO(rjnagal): Use networking stats directly from libcontainer.
stats.Network, err = sysinfo.GetNetworkStats(networkInterfaces[0])
if err != nil {
return stats, err
}
}
return stats, nil
}
// Get cgroup and networking stats of the specified container
func GetStats(cgroupManager cgroups.Manager, networkInterfaces []string, pid int) (*info.ContainerStats, error) {
cgroupStats, err := cgroupManager.GetStats()
if err != nil {
return nil, err
}
libcontainerStats := &libcontainer.Stats{
CgroupStats: cgroupStats,
}
stats := toContainerStats(libcontainerStats)
// TODO(rjnagal): Use networking stats directly from libcontainer.
stats.Network.Interfaces = make([]info.InterfaceStats, len(networkInterfaces))
for i := range networkInterfaces {
interfaceStats, err := sysinfo.GetNetworkStats(networkInterfaces[i])
if err != nil {
return stats, err
}
stats.Network.Interfaces[i] = interfaceStats
}
// If we know the pid & we haven't discovered any network interfaces yet
// try the network namespace.
if pid > 0 && len(stats.Network.Interfaces) == 0 {
nsStats, err := networkStatsFromNs(pid)
if err != nil {
glog.V(2).Infof("Unable to get network stats from pid %d: %v", pid, err)
} else {
stats.Network.Interfaces = append(stats.Network.Interfaces, nsStats...)
}
}
// For backwards compatibility.
if len(stats.Network.Interfaces) > 0 {
stats.Network.InterfaceStats = stats.Network.Interfaces[0]
}
return stats, nil
}