| //go:build !windows |
| // +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/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" |
| } |
| |
| if v.CgroupDriver != cgroupNoneDriver { |
| 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() |
| v.RuncCommit.ID = "N/A" |
| v.ContainerdCommit.ID = "N/A" |
| v.InitCommit.ID = "N/A" |
| |
| 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) |
| } else { |
| v.RuncCommit.ID = commit |
| } |
| } else { |
| logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err) |
| } |
| |
| 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) |
| } |
| |
| 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) |
| } else { |
| v.InitCommit.ID = commit |
| } |
| } else { |
| logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err) |
| } |
| |
| // Set expected and actual commits to the same value to prevent the client |
| // showing that the version does not match the "expected" version/commit. |
| v.RuncCommit.Expected = v.RuncCommit.ID |
| v.ContainerdCommit.Expected = v.ContainerdCommit.ID |
| v.InitCommit.Expected = v.InitCommit.ID |
| |
| 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.CgroupVersion == "1" { |
| // kernel memory is not available for cgroup v2. |
| // Warning is not printed on cgroup v2, because there is no action user can take. |
| v.Warnings = append(v.Warnings, "WARNING: No kernel memory TCP limit support") |
| } |
| if !v.OomKillDisable && v.CgroupVersion == "1" { |
| // oom kill disable is not available for cgroup v2. |
| // Warning is not printed on cgroup v2, because there is no action user can take. |
| 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") |
| } |
| // TODO add fields for these options in types.Info |
| if !sysInfo.BlkioWeight && v.CgroupVersion == "2" { |
| // blkio weight is not available on cgroup v1 since kernel 5.0. |
| // Warning is not printed on cgroup v1, because there is no action user can take. |
| // On cgroup v2, blkio weight is implemented using io.weight |
| v.Warnings = append(v.Warnings, "WARNING: No io.weight support") |
| } |
| if !sysInfo.BlkioWeightDevice && v.CgroupVersion == "2" { |
| v.Warnings = append(v.Warnings, "WARNING: No io.weight (per device) support") |
| } |
| if !sysInfo.BlkioReadBpsDevice { |
| if v.CgroupVersion == "2" { |
| v.Warnings = append(v.Warnings, "WARNING: No io.max (rbps) support") |
| } else { |
| v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_bps_device support") |
| } |
| } |
| if !sysInfo.BlkioWriteBpsDevice { |
| if v.CgroupVersion == "2" { |
| v.Warnings = append(v.Warnings, "WARNING: No io.max (wbps) support") |
| } else { |
| v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.write_bps_device support") |
| } |
| } |
| if !sysInfo.BlkioReadIOpsDevice { |
| if v.CgroupVersion == "2" { |
| v.Warnings = append(v.Warnings, "WARNING: No io.max (riops) support") |
| } else { |
| v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_iops_device support") |
| } |
| } |
| if !sysInfo.BlkioWriteIOpsDevice { |
| if v.CgroupVersion == "2" { |
| v.Warnings = append(v.Warnings, "WARNING: No io.max (wiops) support") |
| } else { |
| 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 |
| } |
