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