mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
c1cd45d547
It's "/docker" for cgroupfs and "system.slice" for systemd. Fix #19140 Signed-off-by: Alexander Morozov <lk4d4@docker.com>
302 lines
11 KiB
Go
302 lines
11 KiB
Go
// +build !windows
|
|
|
|
package execdriver
|
|
|
|
import (
|
|
"encoding/json"
|
|
"io/ioutil"
|
|
"os"
|
|
"path/filepath"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/docker/docker/daemon/execdriver/native/template"
|
|
"github.com/docker/docker/pkg/idtools"
|
|
"github.com/docker/docker/pkg/mount"
|
|
"github.com/docker/go-units"
|
|
"github.com/opencontainers/runc/libcontainer"
|
|
"github.com/opencontainers/runc/libcontainer/cgroups/fs"
|
|
"github.com/opencontainers/runc/libcontainer/configs"
|
|
blkiodev "github.com/opencontainers/runc/libcontainer/configs"
|
|
)
|
|
|
|
// Mount contains information for a mount operation.
|
|
type Mount struct {
|
|
Source string `json:"source"`
|
|
Destination string `json:"destination"`
|
|
Writable bool `json:"writable"`
|
|
Data string `json:"data"`
|
|
Propagation string `json:"mountpropagation"`
|
|
}
|
|
|
|
// Resources contains all resource configs for a driver.
|
|
// Currently these are all for cgroup configs.
|
|
type Resources struct {
|
|
CommonResources
|
|
|
|
// Fields below here are platform specific
|
|
|
|
BlkioWeightDevice []*blkiodev.WeightDevice `json:"blkio_weight_device"`
|
|
BlkioThrottleReadBpsDevice []*blkiodev.ThrottleDevice `json:"blkio_throttle_read_bps_device"`
|
|
BlkioThrottleWriteBpsDevice []*blkiodev.ThrottleDevice `json:"blkio_throttle_write_bps_device"`
|
|
BlkioThrottleReadIOpsDevice []*blkiodev.ThrottleDevice `json:"blkio_throttle_read_iops_device"`
|
|
BlkioThrottleWriteIOpsDevice []*blkiodev.ThrottleDevice `json:"blkio_throttle_write_iops_device"`
|
|
MemorySwap int64 `json:"memory_swap"`
|
|
KernelMemory int64 `json:"kernel_memory"`
|
|
CPUQuota int64 `json:"cpu_quota"`
|
|
CpusetCpus string `json:"cpuset_cpus"`
|
|
CpusetMems string `json:"cpuset_mems"`
|
|
CPUPeriod int64 `json:"cpu_period"`
|
|
Rlimits []*units.Rlimit `json:"rlimits"`
|
|
OomKillDisable bool `json:"oom_kill_disable"`
|
|
MemorySwappiness int64 `json:"memory_swappiness"`
|
|
}
|
|
|
|
// ProcessConfig is the platform specific structure that describes a process
|
|
// that will be run inside a container.
|
|
type ProcessConfig struct {
|
|
CommonProcessConfig
|
|
|
|
// Fields below here are platform specific
|
|
Privileged bool `json:"privileged"`
|
|
User string `json:"user"`
|
|
Console string `json:"-"` // dev/console path
|
|
}
|
|
|
|
// Ipc settings of the container
|
|
// It is for IPC namespace setting. Usually different containers
|
|
// have their own IPC namespace, however this specifies to use
|
|
// an existing IPC namespace.
|
|
// You can join the host's or a container's IPC namespace.
|
|
type Ipc struct {
|
|
ContainerID string `json:"container_id"` // id of the container to join ipc.
|
|
HostIpc bool `json:"host_ipc"`
|
|
}
|
|
|
|
// Pid settings of the container
|
|
// It is for PID namespace setting. Usually different containers
|
|
// have their own PID namespace, however this specifies to use
|
|
// an existing PID namespace.
|
|
// Joining the host's PID namespace is currently the only supported
|
|
// option.
|
|
type Pid struct {
|
|
HostPid bool `json:"host_pid"`
|
|
}
|
|
|
|
// UTS settings of the container
|
|
// It is for UTS namespace setting. Usually different containers
|
|
// have their own UTS namespace, however this specifies to use
|
|
// an existing UTS namespace.
|
|
// Joining the host's UTS namespace is currently the only supported
|
|
// option.
|
|
type UTS struct {
|
|
HostUTS bool `json:"host_uts"`
|
|
}
|
|
|
|
// Network settings of the container
|
|
type Network struct {
|
|
Mtu int `json:"mtu"`
|
|
ContainerID string `json:"container_id"` // id of the container to join network.
|
|
NamespacePath string `json:"namespace_path"`
|
|
HostNetworking bool `json:"host_networking"`
|
|
}
|
|
|
|
// Command wraps an os/exec.Cmd to add more metadata
|
|
type Command struct {
|
|
CommonCommand
|
|
|
|
// Fields below here are platform specific
|
|
|
|
AllowedDevices []*configs.Device `json:"allowed_devices"`
|
|
AppArmorProfile string `json:"apparmor_profile"`
|
|
AutoCreatedDevices []*configs.Device `json:"autocreated_devices"`
|
|
CapAdd []string `json:"cap_add"`
|
|
CapDrop []string `json:"cap_drop"`
|
|
CgroupParent string `json:"cgroup_parent"` // The parent cgroup for this command.
|
|
GIDMapping []idtools.IDMap `json:"gidmapping"`
|
|
GroupAdd []string `json:"group_add"`
|
|
Ipc *Ipc `json:"ipc"`
|
|
OomScoreAdj int `json:"oom_score_adj"`
|
|
Pid *Pid `json:"pid"`
|
|
ReadonlyRootfs bool `json:"readonly_rootfs"`
|
|
RemappedRoot *User `json:"remap_root"`
|
|
SeccompProfile string `json:"seccomp_profile"`
|
|
UIDMapping []idtools.IDMap `json:"uidmapping"`
|
|
UTS *UTS `json:"uts"`
|
|
}
|
|
|
|
// SetRootPropagation sets the root mount propagation mode.
|
|
func SetRootPropagation(config *configs.Config, propagation int) {
|
|
config.RootPropagation = propagation
|
|
}
|
|
|
|
// InitContainer is the initialization of a container config.
|
|
// It returns the initial configs for a container. It's mostly
|
|
// defined by the default template.
|
|
func InitContainer(c *Command) *configs.Config {
|
|
container := template.New()
|
|
|
|
container.Hostname = getEnv("HOSTNAME", c.ProcessConfig.Env)
|
|
container.Cgroups.Name = c.ID
|
|
container.Cgroups.Resources.AllowedDevices = c.AllowedDevices
|
|
container.Devices = c.AutoCreatedDevices
|
|
container.Rootfs = c.Rootfs
|
|
container.Readonlyfs = c.ReadonlyRootfs
|
|
// This can be overridden later by driver during mount setup based
|
|
// on volume options
|
|
SetRootPropagation(container, mount.RPRIVATE)
|
|
container.Cgroups.Parent = c.CgroupParent
|
|
|
|
// check to see if we are running in ramdisk to disable pivot root
|
|
container.NoPivotRoot = os.Getenv("DOCKER_RAMDISK") != ""
|
|
|
|
return container
|
|
}
|
|
|
|
func getEnv(key string, env []string) string {
|
|
for _, pair := range env {
|
|
parts := strings.SplitN(pair, "=", 2)
|
|
if parts[0] == key {
|
|
return parts[1]
|
|
}
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// SetupCgroups setups cgroup resources for a container.
|
|
func SetupCgroups(container *configs.Config, c *Command) error {
|
|
if c.Resources != nil {
|
|
container.Cgroups.Resources.CpuShares = c.Resources.CPUShares
|
|
container.Cgroups.Resources.Memory = c.Resources.Memory
|
|
container.Cgroups.Resources.MemoryReservation = c.Resources.MemoryReservation
|
|
container.Cgroups.Resources.MemorySwap = c.Resources.MemorySwap
|
|
container.Cgroups.Resources.KernelMemory = c.Resources.KernelMemory
|
|
container.Cgroups.Resources.CpusetCpus = c.Resources.CpusetCpus
|
|
container.Cgroups.Resources.CpusetMems = c.Resources.CpusetMems
|
|
container.Cgroups.Resources.CpuPeriod = c.Resources.CPUPeriod
|
|
container.Cgroups.Resources.CpuQuota = c.Resources.CPUQuota
|
|
container.Cgroups.Resources.BlkioWeight = c.Resources.BlkioWeight
|
|
container.Cgroups.Resources.BlkioWeightDevice = c.Resources.BlkioWeightDevice
|
|
container.Cgroups.Resources.BlkioThrottleReadBpsDevice = c.Resources.BlkioThrottleReadBpsDevice
|
|
container.Cgroups.Resources.BlkioThrottleWriteBpsDevice = c.Resources.BlkioThrottleWriteBpsDevice
|
|
container.Cgroups.Resources.BlkioThrottleReadIOPSDevice = c.Resources.BlkioThrottleReadIOpsDevice
|
|
container.Cgroups.Resources.BlkioThrottleWriteIOPSDevice = c.Resources.BlkioThrottleWriteIOpsDevice
|
|
container.Cgroups.Resources.OomKillDisable = c.Resources.OomKillDisable
|
|
container.Cgroups.Resources.MemorySwappiness = c.Resources.MemorySwappiness
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Returns the network statistics for the network interfaces represented by the NetworkRuntimeInfo.
|
|
func getNetworkInterfaceStats(interfaceName string) (*libcontainer.NetworkInterface, error) {
|
|
out := &libcontainer.NetworkInterface{Name: interfaceName}
|
|
// This can happen if the network runtime information is missing - possible if the
|
|
// container was created by an old version of libcontainer.
|
|
if interfaceName == "" {
|
|
return out, nil
|
|
}
|
|
type netStatsPair struct {
|
|
// Where to write the output.
|
|
Out *uint64
|
|
// The network stats file to read.
|
|
File string
|
|
}
|
|
// Ingress for host veth is from the container. Hence tx_bytes stat on the host veth is actually number of bytes received by the container.
|
|
netStats := []netStatsPair{
|
|
{Out: &out.RxBytes, File: "tx_bytes"},
|
|
{Out: &out.RxPackets, File: "tx_packets"},
|
|
{Out: &out.RxErrors, File: "tx_errors"},
|
|
{Out: &out.RxDropped, File: "tx_dropped"},
|
|
|
|
{Out: &out.TxBytes, File: "rx_bytes"},
|
|
{Out: &out.TxPackets, File: "rx_packets"},
|
|
{Out: &out.TxErrors, File: "rx_errors"},
|
|
{Out: &out.TxDropped, File: "rx_dropped"},
|
|
}
|
|
for _, netStat := range netStats {
|
|
data, err := readSysfsNetworkStats(interfaceName, netStat.File)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
*(netStat.Out) = data
|
|
}
|
|
return out, nil
|
|
}
|
|
|
|
// Reads the specified statistics available under /sys/class/net/<EthInterface>/statistics
|
|
func readSysfsNetworkStats(ethInterface, statsFile string) (uint64, error) {
|
|
data, err := ioutil.ReadFile(filepath.Join("/sys/class/net", ethInterface, "statistics", statsFile))
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return strconv.ParseUint(strings.TrimSpace(string(data)), 10, 64)
|
|
}
|
|
|
|
// Stats collects all the resource usage information from a container.
|
|
func Stats(containerDir string, containerMemoryLimit int64, machineMemory int64) (*ResourceStats, error) {
|
|
f, err := os.Open(filepath.Join(containerDir, "state.json"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer f.Close()
|
|
|
|
type network struct {
|
|
Type string
|
|
HostInterfaceName string
|
|
}
|
|
|
|
state := struct {
|
|
CgroupPaths map[string]string `json:"cgroup_paths"`
|
|
Networks []network
|
|
}{}
|
|
|
|
if err := json.NewDecoder(f).Decode(&state); err != nil {
|
|
return nil, err
|
|
}
|
|
now := time.Now()
|
|
|
|
mgr := fs.Manager{Paths: state.CgroupPaths}
|
|
cstats, err := mgr.GetStats()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
stats := &libcontainer.Stats{CgroupStats: cstats}
|
|
// if the container does not have any memory limit specified set the
|
|
// limit to the machines memory
|
|
memoryLimit := containerMemoryLimit
|
|
if memoryLimit == 0 {
|
|
memoryLimit = machineMemory
|
|
}
|
|
for _, iface := range state.Networks {
|
|
switch iface.Type {
|
|
case "veth":
|
|
istats, err := getNetworkInterfaceStats(iface.HostInterfaceName)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
stats.Interfaces = append(stats.Interfaces, istats)
|
|
}
|
|
}
|
|
return &ResourceStats{
|
|
Stats: stats,
|
|
Read: now,
|
|
MemoryLimit: memoryLimit,
|
|
}, nil
|
|
}
|
|
|
|
// User contains the uid and gid representing a Unix user
|
|
type User struct {
|
|
UID int `json:"root_uid"`
|
|
GID int `json:"root_gid"`
|
|
}
|
|
|
|
// ExitStatus provides exit reasons for a container.
|
|
type ExitStatus struct {
|
|
// The exit code with which the container exited.
|
|
ExitCode int
|
|
|
|
// Whether the container encountered an OOM.
|
|
OOMKilled bool
|
|
}
|