DockerCLI/cli/command/system/info.go

361 lines
13 KiB
Go

package system
import (
"context"
"fmt"
"io"
"sort"
"strings"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/debug"
"github.com/docker/cli/templates"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/go-units"
"github.com/spf13/cobra"
)
type infoOptions struct {
format string
}
// NewInfoCommand creates a new cobra.Command for `docker info`
func NewInfoCommand(dockerCli command.Cli) *cobra.Command {
var opts infoOptions
cmd := &cobra.Command{
Use: "info [OPTIONS]",
Short: "Display system-wide information",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return runInfo(dockerCli, &opts)
},
}
flags := cmd.Flags()
flags.StringVarP(&opts.format, "format", "f", "", "Format the output using the given Go template")
return cmd
}
func runInfo(dockerCli command.Cli, opts *infoOptions) error {
ctx := context.Background()
info, err := dockerCli.Client().Info(ctx)
if err != nil {
return err
}
if opts.format == "" {
return prettyPrintInfo(dockerCli, info)
}
return formatInfo(dockerCli, info, opts.format)
}
// nolint: gocyclo
func prettyPrintInfo(dockerCli command.Cli, info types.Info) error {
fmt.Fprintln(dockerCli.Out(), "Containers:", info.Containers)
fmt.Fprintln(dockerCli.Out(), " Running:", info.ContainersRunning)
fmt.Fprintln(dockerCli.Out(), " Paused:", info.ContainersPaused)
fmt.Fprintln(dockerCli.Out(), " Stopped:", info.ContainersStopped)
fmt.Fprintln(dockerCli.Out(), "Images:", info.Images)
fprintlnNonEmpty(dockerCli.Out(), "Server Version:", info.ServerVersion)
fprintlnNonEmpty(dockerCli.Out(), "Storage Driver:", info.Driver)
if info.DriverStatus != nil {
for _, pair := range info.DriverStatus {
fmt.Fprintf(dockerCli.Out(), " %s: %s\n", pair[0], pair[1])
}
}
if info.SystemStatus != nil {
for _, pair := range info.SystemStatus {
fmt.Fprintf(dockerCli.Out(), "%s: %s\n", pair[0], pair[1])
}
}
fprintlnNonEmpty(dockerCli.Out(), "Logging Driver:", info.LoggingDriver)
fprintlnNonEmpty(dockerCli.Out(), "Cgroup Driver:", info.CgroupDriver)
fmt.Fprintln(dockerCli.Out(), "Plugins:")
fmt.Fprintln(dockerCli.Out(), " Volume:", strings.Join(info.Plugins.Volume, " "))
fmt.Fprintln(dockerCli.Out(), " Network:", strings.Join(info.Plugins.Network, " "))
if len(info.Plugins.Authorization) != 0 {
fmt.Fprintln(dockerCli.Out(), " Authorization:", strings.Join(info.Plugins.Authorization, " "))
}
fmt.Fprintln(dockerCli.Out(), " Log:", strings.Join(info.Plugins.Log, " "))
fmt.Fprintln(dockerCli.Out(), "Swarm:", info.Swarm.LocalNodeState)
printSwarmInfo(dockerCli, info)
if len(info.Runtimes) > 0 {
fmt.Fprint(dockerCli.Out(), "Runtimes:")
for name := range info.Runtimes {
fmt.Fprintf(dockerCli.Out(), " %s", name)
}
fmt.Fprint(dockerCli.Out(), "\n")
fmt.Fprintln(dockerCli.Out(), "Default Runtime:", info.DefaultRuntime)
}
if info.OSType == "linux" {
fmt.Fprintln(dockerCli.Out(), "Init Binary:", info.InitBinary)
for _, ci := range []struct {
Name string
Commit types.Commit
}{
{"containerd", info.ContainerdCommit},
{"runc", info.RuncCommit},
{"init", info.InitCommit},
} {
fmt.Fprintf(dockerCli.Out(), "%s version: %s", ci.Name, ci.Commit.ID)
if ci.Commit.ID != ci.Commit.Expected {
fmt.Fprintf(dockerCli.Out(), " (expected: %s)", ci.Commit.Expected)
}
fmt.Fprint(dockerCli.Out(), "\n")
}
if len(info.SecurityOptions) != 0 {
kvs, err := types.DecodeSecurityOptions(info.SecurityOptions)
if err != nil {
return err
}
fmt.Fprintln(dockerCli.Out(), "Security Options:")
for _, so := range kvs {
fmt.Fprintln(dockerCli.Out(), " "+so.Name)
for _, o := range so.Options {
switch o.Key {
case "profile":
if o.Value != "default" {
fmt.Fprintln(dockerCli.Err(), " WARNING: You're not using the default seccomp profile")
}
fmt.Fprintln(dockerCli.Out(), " Profile:", o.Value)
}
}
}
}
}
// Isolation only has meaning on a Windows daemon.
if info.OSType == "windows" {
fmt.Fprintln(dockerCli.Out(), "Default Isolation:", info.Isolation)
}
fprintlnNonEmpty(dockerCli.Out(), "Kernel Version:", info.KernelVersion)
fprintlnNonEmpty(dockerCli.Out(), "Operating System:", info.OperatingSystem)
fprintlnNonEmpty(dockerCli.Out(), "OSType:", info.OSType)
fprintlnNonEmpty(dockerCli.Out(), "Architecture:", info.Architecture)
fmt.Fprintln(dockerCli.Out(), "CPUs:", info.NCPU)
fmt.Fprintln(dockerCli.Out(), "Total Memory:", units.BytesSize(float64(info.MemTotal)))
fprintlnNonEmpty(dockerCli.Out(), "Name:", info.Name)
fprintlnNonEmpty(dockerCli.Out(), "ID:", info.ID)
fmt.Fprintln(dockerCli.Out(), "Docker Root Dir:", info.DockerRootDir)
fmt.Fprintln(dockerCli.Out(), "Debug Mode (client):", debug.IsEnabled())
fmt.Fprintln(dockerCli.Out(), "Debug Mode (server):", info.Debug)
if info.Debug {
fmt.Fprintln(dockerCli.Out(), " File Descriptors:", info.NFd)
fmt.Fprintln(dockerCli.Out(), " Goroutines:", info.NGoroutines)
fmt.Fprintln(dockerCli.Out(), " System Time:", info.SystemTime)
fmt.Fprintln(dockerCli.Out(), " EventsListeners:", info.NEventsListener)
}
fprintlnNonEmpty(dockerCli.Out(), "HTTP Proxy:", info.HTTPProxy)
fprintlnNonEmpty(dockerCli.Out(), "HTTPS Proxy:", info.HTTPSProxy)
fprintlnNonEmpty(dockerCli.Out(), "No Proxy:", info.NoProxy)
if info.IndexServerAddress != "" {
u := dockerCli.ConfigFile().AuthConfigs[info.IndexServerAddress].Username
if len(u) > 0 {
fmt.Fprintln(dockerCli.Out(), "Username:", u)
}
fmt.Fprintln(dockerCli.Out(), "Registry:", info.IndexServerAddress)
}
if info.Labels != nil {
fmt.Fprintln(dockerCli.Out(), "Labels:")
for _, lbl := range info.Labels {
fmt.Fprintln(dockerCli.Out(), " "+lbl)
}
}
fmt.Fprintln(dockerCli.Out(), "Experimental:", info.ExperimentalBuild)
fprintlnNonEmpty(dockerCli.Out(), "Cluster Store:", info.ClusterStore)
fprintlnNonEmpty(dockerCli.Out(), "Cluster Advertise:", info.ClusterAdvertise)
if info.RegistryConfig != nil && (len(info.RegistryConfig.InsecureRegistryCIDRs) > 0 || len(info.RegistryConfig.IndexConfigs) > 0) {
fmt.Fprintln(dockerCli.Out(), "Insecure Registries:")
for _, registry := range info.RegistryConfig.IndexConfigs {
if !registry.Secure {
fmt.Fprintln(dockerCli.Out(), " "+registry.Name)
}
}
for _, registry := range info.RegistryConfig.InsecureRegistryCIDRs {
mask, _ := registry.Mask.Size()
fmt.Fprintf(dockerCli.Out(), " %s/%d\n", registry.IP.String(), mask)
}
}
if info.RegistryConfig != nil && len(info.RegistryConfig.Mirrors) > 0 {
fmt.Fprintln(dockerCli.Out(), "Registry Mirrors:")
for _, mirror := range info.RegistryConfig.Mirrors {
fmt.Fprintln(dockerCli.Out(), " "+mirror)
}
}
fmt.Fprintln(dockerCli.Out(), "Live Restore Enabled:", info.LiveRestoreEnabled)
fmt.Fprint(dockerCli.Out(), "\n")
// Only output these warnings if the server does not support these features
if info.OSType != "windows" {
printStorageDriverWarnings(dockerCli, info)
if !info.MemoryLimit {
fmt.Fprintln(dockerCli.Err(), "WARNING: No memory limit support")
}
if !info.SwapLimit {
fmt.Fprintln(dockerCli.Err(), "WARNING: No swap limit support")
}
if !info.KernelMemory {
fmt.Fprintln(dockerCli.Err(), "WARNING: No kernel memory limit support")
}
if !info.OomKillDisable {
fmt.Fprintln(dockerCli.Err(), "WARNING: No oom kill disable support")
}
if !info.CPUCfsQuota {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpu cfs quota support")
}
if !info.CPUCfsPeriod {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpu cfs period support")
}
if !info.CPUShares {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpu shares support")
}
if !info.CPUSet {
fmt.Fprintln(dockerCli.Err(), "WARNING: No cpuset support")
}
if !info.IPv4Forwarding {
fmt.Fprintln(dockerCli.Err(), "WARNING: IPv4 forwarding is disabled")
}
if !info.BridgeNfIptables {
fmt.Fprintln(dockerCli.Err(), "WARNING: bridge-nf-call-iptables is disabled")
}
if !info.BridgeNfIP6tables {
fmt.Fprintln(dockerCli.Err(), "WARNING: bridge-nf-call-ip6tables is disabled")
}
}
return nil
}
func printSwarmInfo(dockerCli command.Cli, info types.Info) {
if info.Swarm.LocalNodeState == swarm.LocalNodeStateInactive || info.Swarm.LocalNodeState == swarm.LocalNodeStateLocked {
return
}
fmt.Fprintln(dockerCli.Out(), " NodeID:", info.Swarm.NodeID)
if info.Swarm.Error != "" {
fmt.Fprintln(dockerCli.Out(), " Error:", info.Swarm.Error)
}
fmt.Fprintln(dockerCli.Out(), " Is Manager:", info.Swarm.ControlAvailable)
if info.Swarm.Cluster != nil && info.Swarm.ControlAvailable && info.Swarm.Error == "" && info.Swarm.LocalNodeState != swarm.LocalNodeStateError {
fmt.Fprintln(dockerCli.Out(), " ClusterID:", info.Swarm.Cluster.ID)
fmt.Fprintln(dockerCli.Out(), " Managers:", info.Swarm.Managers)
fmt.Fprintln(dockerCli.Out(), " Nodes:", info.Swarm.Nodes)
fmt.Fprintln(dockerCli.Out(), " Orchestration:")
taskHistoryRetentionLimit := int64(0)
if info.Swarm.Cluster.Spec.Orchestration.TaskHistoryRetentionLimit != nil {
taskHistoryRetentionLimit = *info.Swarm.Cluster.Spec.Orchestration.TaskHistoryRetentionLimit
}
fmt.Fprintln(dockerCli.Out(), " Task History Retention Limit:", taskHistoryRetentionLimit)
fmt.Fprintln(dockerCli.Out(), " Raft:")
fmt.Fprintln(dockerCli.Out(), " Snapshot Interval:", info.Swarm.Cluster.Spec.Raft.SnapshotInterval)
if info.Swarm.Cluster.Spec.Raft.KeepOldSnapshots != nil {
fmt.Fprintf(dockerCli.Out(), " Number of Old Snapshots to Retain: %d\n", *info.Swarm.Cluster.Spec.Raft.KeepOldSnapshots)
}
fmt.Fprintln(dockerCli.Out(), " Heartbeat Tick:", info.Swarm.Cluster.Spec.Raft.HeartbeatTick)
fmt.Fprintln(dockerCli.Out(), " Election Tick:", info.Swarm.Cluster.Spec.Raft.ElectionTick)
fmt.Fprintln(dockerCli.Out(), " Dispatcher:")
fmt.Fprintln(dockerCli.Out(), " Heartbeat Period:", units.HumanDuration(info.Swarm.Cluster.Spec.Dispatcher.HeartbeatPeriod))
fmt.Fprintln(dockerCli.Out(), " CA Configuration:")
fmt.Fprintln(dockerCli.Out(), " Expiry Duration:", units.HumanDuration(info.Swarm.Cluster.Spec.CAConfig.NodeCertExpiry))
fmt.Fprintln(dockerCli.Out(), " Force Rotate:", info.Swarm.Cluster.Spec.CAConfig.ForceRotate)
if caCert := strings.TrimSpace(info.Swarm.Cluster.Spec.CAConfig.SigningCACert); caCert != "" {
fmt.Fprintf(dockerCli.Out(), " Signing CA Certificate: \n%s\n\n", caCert)
}
if len(info.Swarm.Cluster.Spec.CAConfig.ExternalCAs) > 0 {
fmt.Fprintln(dockerCli.Out(), " External CAs:")
for _, entry := range info.Swarm.Cluster.Spec.CAConfig.ExternalCAs {
fmt.Fprintf(dockerCli.Out(), " %s: %s\n", entry.Protocol, entry.URL)
}
}
fmt.Fprintln(dockerCli.Out(), " Autolock Managers:", info.Swarm.Cluster.Spec.EncryptionConfig.AutoLockManagers)
fmt.Fprintln(dockerCli.Out(), " Root Rotation In Progress:", info.Swarm.Cluster.RootRotationInProgress)
}
fmt.Fprintln(dockerCli.Out(), " Node Address:", info.Swarm.NodeAddr)
if len(info.Swarm.RemoteManagers) > 0 {
managers := []string{}
for _, entry := range info.Swarm.RemoteManagers {
managers = append(managers, entry.Addr)
}
sort.Strings(managers)
fmt.Fprintln(dockerCli.Out(), " Manager Addresses:")
for _, entry := range managers {
fmt.Fprintf(dockerCli.Out(), " %s\n", entry)
}
}
}
func printStorageDriverWarnings(dockerCli command.Cli, info types.Info) {
if info.DriverStatus == nil {
return
}
for _, pair := range info.DriverStatus {
if pair[0] == "Data loop file" {
fmt.Fprintf(dockerCli.Err(), "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.\n", info.Driver)
}
if pair[0] == "Supports d_type" && pair[1] == "false" {
backingFs := getBackingFs(info)
msg := fmt.Sprintf("WARNING: %s: the backing %s filesystem is formatted without d_type support, which leads to incorrect behavior.\n", info.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."
fmt.Fprintln(dockerCli.Err(), msg)
}
}
}
func getBackingFs(info types.Info) string {
if info.DriverStatus == nil {
return ""
}
for _, pair := range info.DriverStatus {
if pair[0] == "Backing Filesystem" {
return pair[1]
}
}
return ""
}
func formatInfo(dockerCli command.Cli, info types.Info, format string) error {
tmpl, err := templates.Parse(format)
if err != nil {
return cli.StatusError{StatusCode: 64,
Status: "Template parsing error: " + err.Error()}
}
err = tmpl.Execute(dockerCli.Out(), info)
dockerCli.Out().Write([]byte{'\n'})
return err
}
func fprintlnNonEmpty(w io.Writer, label, value string) {
if value != "" {
fmt.Fprintln(w, label, value)
}
}