f350b53241
ref: https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
280 lines
9.3 KiB
Go
280 lines
9.3 KiB
Go
// +build !windows
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package daemon // import "github.com/docker/docker/daemon"
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import (
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"context"
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"fmt"
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"os/exec"
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"path/filepath"
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"strings"
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"github.com/docker/docker/api/types"
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containertypes "github.com/docker/docker/api/types/container"
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"github.com/docker/docker/dockerversion"
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"github.com/docker/docker/pkg/sysinfo"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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// fillPlatformInfo fills the platform related info.
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func (daemon *Daemon) fillPlatformInfo(v *types.Info, sysInfo *sysinfo.SysInfo) {
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v.CgroupDriver = daemon.getCgroupDriver()
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v.CgroupVersion = "1"
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if sysInfo.CgroupUnified {
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v.CgroupVersion = "2"
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}
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v.MemoryLimit = sysInfo.MemoryLimit
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v.SwapLimit = sysInfo.SwapLimit
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v.KernelMemory = sysInfo.KernelMemory
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v.KernelMemoryTCP = sysInfo.KernelMemoryTCP
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v.OomKillDisable = sysInfo.OomKillDisable
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v.CPUCfsPeriod = sysInfo.CPUCfsPeriod
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v.CPUCfsQuota = sysInfo.CPUCfsQuota
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v.CPUShares = sysInfo.CPUShares
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v.CPUSet = sysInfo.Cpuset
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v.PidsLimit = sysInfo.PidsLimit
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v.Runtimes = daemon.configStore.GetAllRuntimes()
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v.DefaultRuntime = daemon.configStore.GetDefaultRuntimeName()
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v.InitBinary = daemon.configStore.GetInitPath()
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defaultRuntimeBinary := daemon.configStore.GetRuntime(v.DefaultRuntime).Path
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if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
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if _, _, commit, err := parseRuntimeVersion(string(rv)); err != nil {
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logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
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v.RuncCommit.ID = "N/A"
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} else {
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v.RuncCommit.ID = commit
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}
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} else {
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logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
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v.RuncCommit.ID = "N/A"
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}
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// runc is now shipped as a separate package. Set "expected" to same value
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// as "ID" to prevent clients from reporting a version-mismatch
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v.RuncCommit.Expected = v.RuncCommit.ID
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if rv, err := daemon.containerd.Version(context.Background()); err == nil {
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v.ContainerdCommit.ID = rv.Revision
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} else {
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logrus.Warnf("failed to retrieve containerd version: %v", err)
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v.ContainerdCommit.ID = "N/A"
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}
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// containerd is now shipped as a separate package. Set "expected" to same
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// value as "ID" to prevent clients from reporting a version-mismatch
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v.ContainerdCommit.Expected = v.ContainerdCommit.ID
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// TODO is there still a need to check the expected version for tini?
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// if not, we can change this, and just set "Expected" to v.InitCommit.ID
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v.InitCommit.Expected = dockerversion.InitCommitID
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defaultInitBinary := daemon.configStore.GetInitPath()
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if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
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if _, commit, err := parseInitVersion(string(rv)); err != nil {
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logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
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v.InitCommit.ID = "N/A"
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} else {
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v.InitCommit.ID = commit
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if len(dockerversion.InitCommitID) > len(commit) {
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v.InitCommit.Expected = dockerversion.InitCommitID[0:len(commit)]
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}
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}
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} else {
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logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
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v.InitCommit.ID = "N/A"
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}
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if v.CgroupDriver == cgroupNoneDriver {
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if v.CgroupVersion == "2" {
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v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroup. To enable cgroup in rootless-mode, you need to set exec-opt \"native.cgroupdriver=systemd\".")
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} else {
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v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroup. To enable cgroup in rootless-mode, you need to boot the system in cgroup v2 mode and set exec-opt \"native.cgroupdriver=systemd\".")
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}
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} else {
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if !v.MemoryLimit {
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v.Warnings = append(v.Warnings, "WARNING: No memory limit support")
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}
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if !v.SwapLimit {
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v.Warnings = append(v.Warnings, "WARNING: No swap limit support")
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}
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if !v.KernelMemory {
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v.Warnings = append(v.Warnings, "WARNING: No kernel memory limit support")
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}
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if !v.KernelMemoryTCP {
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v.Warnings = append(v.Warnings, "WARNING: No kernel memory TCP limit support")
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}
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if !v.OomKillDisable {
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v.Warnings = append(v.Warnings, "WARNING: No oom kill disable support")
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}
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if !v.CPUCfsQuota {
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v.Warnings = append(v.Warnings, "WARNING: No cpu cfs quota support")
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}
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if !v.CPUCfsPeriod {
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v.Warnings = append(v.Warnings, "WARNING: No cpu cfs period support")
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}
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if !v.CPUShares {
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v.Warnings = append(v.Warnings, "WARNING: No cpu shares support")
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}
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if !v.CPUSet {
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v.Warnings = append(v.Warnings, "WARNING: No cpuset support")
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}
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if v.CgroupVersion == "2" {
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v.Warnings = append(v.Warnings, "WARNING: Support for cgroup v2 is experimental")
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}
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}
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if !v.IPv4Forwarding {
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v.Warnings = append(v.Warnings, "WARNING: IPv4 forwarding is disabled")
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}
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if !v.BridgeNfIptables {
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v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-iptables is disabled")
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}
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if !v.BridgeNfIP6tables {
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v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-ip6tables is disabled")
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}
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}
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func (daemon *Daemon) fillPlatformVersion(v *types.Version) {
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if rv, err := daemon.containerd.Version(context.Background()); err == nil {
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v.Components = append(v.Components, types.ComponentVersion{
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Name: "containerd",
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Version: rv.Version,
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Details: map[string]string{
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"GitCommit": rv.Revision,
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},
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})
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}
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defaultRuntime := daemon.configStore.GetDefaultRuntimeName()
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defaultRuntimeBinary := daemon.configStore.GetRuntime(defaultRuntime).Path
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if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
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if _, ver, commit, err := parseRuntimeVersion(string(rv)); err != nil {
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logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
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} else {
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v.Components = append(v.Components, types.ComponentVersion{
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Name: defaultRuntime,
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Version: ver,
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Details: map[string]string{
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"GitCommit": commit,
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},
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})
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}
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} else {
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logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
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}
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defaultInitBinary := daemon.configStore.GetInitPath()
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if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
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if ver, commit, err := parseInitVersion(string(rv)); err != nil {
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logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
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} else {
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v.Components = append(v.Components, types.ComponentVersion{
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Name: filepath.Base(defaultInitBinary),
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Version: ver,
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Details: map[string]string{
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"GitCommit": commit,
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},
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})
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}
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} else {
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logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
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}
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}
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func fillDriverWarnings(v *types.Info) {
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for _, pair := range v.DriverStatus {
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if pair[0] == "Data loop file" {
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msg := fmt.Sprintf("WARNING: %s: usage of loopback devices is "+
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"strongly discouraged for production use.\n "+
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"Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.", v.Driver)
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v.Warnings = append(v.Warnings, msg)
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continue
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}
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if pair[0] == "Supports d_type" && pair[1] == "false" {
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backingFs := getBackingFs(v)
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msg := fmt.Sprintf("WARNING: %s: the backing %s filesystem is formatted without d_type support, which leads to incorrect behavior.\n", v.Driver, backingFs)
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if backingFs == "xfs" {
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msg += " Reformat the filesystem with ftype=1 to enable d_type support.\n"
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}
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msg += " Running without d_type support will not be supported in future releases."
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v.Warnings = append(v.Warnings, msg)
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continue
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}
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}
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}
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func getBackingFs(v *types.Info) string {
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for _, pair := range v.DriverStatus {
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if pair[0] == "Backing Filesystem" {
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return pair[1]
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}
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}
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return ""
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}
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// parseInitVersion parses a Tini version string, and extracts the "version"
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// and "git commit" from the output.
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//
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// Output example from `docker-init --version`:
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//
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// tini version 0.18.0 - git.fec3683
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func parseInitVersion(v string) (version string, commit string, err error) {
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parts := strings.Split(v, " - ")
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if len(parts) >= 2 {
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gitParts := strings.Split(strings.TrimSpace(parts[1]), ".")
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if len(gitParts) == 2 && gitParts[0] == "git" {
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commit = gitParts[1]
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}
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}
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parts[0] = strings.TrimSpace(parts[0])
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if strings.HasPrefix(parts[0], "tini version ") {
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version = strings.TrimPrefix(parts[0], "tini version ")
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}
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if version == "" && commit == "" {
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err = errors.Errorf("unknown output format: %s", v)
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}
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return version, commit, err
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}
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// parseRuntimeVersion parses the output of `[runtime] --version` and extracts the
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// "name", "version" and "git commit" from the output.
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//
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// Output example from `runc --version`:
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//
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// runc version 1.0.0-rc5+dev
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// commit: 69663f0bd4b60df09991c08812a60108003fa340
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// spec: 1.0.0
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func parseRuntimeVersion(v string) (runtime string, version string, commit string, err error) {
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lines := strings.Split(strings.TrimSpace(v), "\n")
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for _, line := range lines {
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if strings.Contains(line, "version") {
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s := strings.Split(line, "version")
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runtime = strings.TrimSpace(s[0])
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version = strings.TrimSpace(s[len(s)-1])
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continue
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}
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if strings.HasPrefix(line, "commit:") {
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commit = strings.TrimSpace(strings.TrimPrefix(line, "commit:"))
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continue
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}
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}
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if version == "" && commit == "" {
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err = errors.Errorf("unknown output format: %s", v)
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}
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return runtime, version, commit, err
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}
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func (daemon *Daemon) cgroupNamespacesEnabled(sysInfo *sysinfo.SysInfo) bool {
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return sysInfo.CgroupNamespaces && containertypes.CgroupnsMode(daemon.configStore.CgroupNamespaceMode).IsPrivate()
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}
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// Rootless returns true if daemon is running in rootless mode
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func (daemon *Daemon) Rootless() bool {
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return daemon.configStore.Rootless
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}
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