DockerCLI/command/system/info.go

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package system
import (
"fmt"
"strings"
"time"
"golang.org/x/net/context"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"github.com/docker/docker/pkg/ioutils"
"github.com/docker/docker/utils"
"github.com/docker/docker/utils/templates"
"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.DockerCli) *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.DockerCli, 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)
}
func prettyPrintInfo(dockerCli *command.DockerCli, info types.Info) error {
fmt.Fprintf(dockerCli.Out(), "Containers: %d\n", info.Containers)
fmt.Fprintf(dockerCli.Out(), " Running: %d\n", info.ContainersRunning)
fmt.Fprintf(dockerCli.Out(), " Paused: %d\n", info.ContainersPaused)
fmt.Fprintf(dockerCli.Out(), " Stopped: %d\n", info.ContainersStopped)
fmt.Fprintf(dockerCli.Out(), "Images: %d\n", info.Images)
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Server Version: %s\n", info.ServerVersion)
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Storage Driver: %s\n", info.Driver)
if info.DriverStatus != nil {
for _, pair := range info.DriverStatus {
fmt.Fprintf(dockerCli.Out(), " %s: %s\n", pair[0], pair[1])
// print a warning if devicemapper is using a loopback file
if pair[0] == "Data loop file" {
fmt.Fprintln(dockerCli.Err(), " WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.")
}
}
}
if info.SystemStatus != nil {
for _, pair := range info.SystemStatus {
fmt.Fprintf(dockerCli.Out(), "%s: %s\n", pair[0], pair[1])
}
}
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Logging Driver: %s\n", info.LoggingDriver)
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Cgroup Driver: %s\n", info.CgroupDriver)
fmt.Fprintf(dockerCli.Out(), "Plugins: \n")
fmt.Fprintf(dockerCli.Out(), " Volume:")
fmt.Fprintf(dockerCli.Out(), " %s", strings.Join(info.Plugins.Volume, " "))
fmt.Fprintf(dockerCli.Out(), "\n")
fmt.Fprintf(dockerCli.Out(), " Network:")
fmt.Fprintf(dockerCli.Out(), " %s", strings.Join(info.Plugins.Network, " "))
fmt.Fprintf(dockerCli.Out(), "\n")
if len(info.Plugins.Authorization) != 0 {
fmt.Fprintf(dockerCli.Out(), " Authorization:")
fmt.Fprintf(dockerCli.Out(), " %s", strings.Join(info.Plugins.Authorization, " "))
fmt.Fprintf(dockerCli.Out(), "\n")
}
fmt.Fprintf(dockerCli.Out(), "Swarm: %v\n", info.Swarm.LocalNodeState)
if info.Swarm.LocalNodeState != swarm.LocalNodeStateInactive {
fmt.Fprintf(dockerCli.Out(), " NodeID: %s\n", info.Swarm.NodeID)
if info.Swarm.Error != "" {
fmt.Fprintf(dockerCli.Out(), " Error: %v\n", info.Swarm.Error)
}
fmt.Fprintf(dockerCli.Out(), " Is Manager: %v\n", info.Swarm.ControlAvailable)
if info.Swarm.ControlAvailable {
fmt.Fprintf(dockerCli.Out(), " ClusterID: %s\n", info.Swarm.Cluster.ID)
fmt.Fprintf(dockerCli.Out(), " Managers: %d\n", info.Swarm.Managers)
fmt.Fprintf(dockerCli.Out(), " Nodes: %d\n", info.Swarm.Nodes)
fmt.Fprintf(dockerCli.Out(), " Orchestration:\n")
fmt.Fprintf(dockerCli.Out(), " Task History Retention Limit: %d\n", info.Swarm.Cluster.Spec.Orchestration.TaskHistoryRetentionLimit)
fmt.Fprintf(dockerCli.Out(), " Raft:\n")
fmt.Fprintf(dockerCli.Out(), " Snapshot Interval: %d\n", info.Swarm.Cluster.Spec.Raft.SnapshotInterval)
fmt.Fprintf(dockerCli.Out(), " Heartbeat Tick: %d\n", info.Swarm.Cluster.Spec.Raft.HeartbeatTick)
fmt.Fprintf(dockerCli.Out(), " Election Tick: %d\n", info.Swarm.Cluster.Spec.Raft.ElectionTick)
fmt.Fprintf(dockerCli.Out(), " Dispatcher:\n")
fmt.Fprintf(dockerCli.Out(), " Heartbeat Period: %s\n", units.HumanDuration(time.Duration(info.Swarm.Cluster.Spec.Dispatcher.HeartbeatPeriod)))
fmt.Fprintf(dockerCli.Out(), " CA Configuration:\n")
fmt.Fprintf(dockerCli.Out(), " Expiry Duration: %s\n", units.HumanDuration(info.Swarm.Cluster.Spec.CAConfig.NodeCertExpiry))
if len(info.Swarm.Cluster.Spec.CAConfig.ExternalCAs) > 0 {
fmt.Fprintf(dockerCli.Out(), " External CAs:\n")
for _, entry := range info.Swarm.Cluster.Spec.CAConfig.ExternalCAs {
fmt.Fprintf(dockerCli.Out(), " %s: %s\n", entry.Protocol, entry.URL)
}
}
}
fmt.Fprintf(dockerCli.Out(), " Node Address: %s\n", info.Swarm.NodeAddr)
}
if len(info.Runtimes) > 0 {
fmt.Fprintf(dockerCli.Out(), "Runtimes:")
for name := range info.Runtimes {
fmt.Fprintf(dockerCli.Out(), " %s", name)
}
fmt.Fprint(dockerCli.Out(), "\n")
fmt.Fprintf(dockerCli.Out(), "Default Runtime: %s\n", info.DefaultRuntime)
}
if info.OSType == "linux" {
fmt.Fprintf(dockerCli.Out(), "Security Options:")
ioutils.FprintfIfNotEmpty(dockerCli.Out(), " %s", strings.Join(info.SecurityOptions, " "))
fmt.Fprintf(dockerCli.Out(), "\n")
}
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Kernel Version: %s\n", info.KernelVersion)
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Operating System: %s\n", info.OperatingSystem)
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "OSType: %s\n", info.OSType)
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Architecture: %s\n", info.Architecture)
fmt.Fprintf(dockerCli.Out(), "CPUs: %d\n", info.NCPU)
fmt.Fprintf(dockerCli.Out(), "Total Memory: %s\n", units.BytesSize(float64(info.MemTotal)))
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Name: %s\n", info.Name)
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "ID: %s\n", info.ID)
fmt.Fprintf(dockerCli.Out(), "Docker Root Dir: %s\n", info.DockerRootDir)
fmt.Fprintf(dockerCli.Out(), "Debug Mode (client): %v\n", utils.IsDebugEnabled())
fmt.Fprintf(dockerCli.Out(), "Debug Mode (server): %v\n", info.Debug)
if info.Debug {
fmt.Fprintf(dockerCli.Out(), " File Descriptors: %d\n", info.NFd)
fmt.Fprintf(dockerCli.Out(), " Goroutines: %d\n", info.NGoroutines)
fmt.Fprintf(dockerCli.Out(), " System Time: %s\n", info.SystemTime)
fmt.Fprintf(dockerCli.Out(), " EventsListeners: %d\n", info.NEventsListener)
}
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Http Proxy: %s\n", info.HTTPProxy)
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "Https Proxy: %s\n", info.HTTPSProxy)
ioutils.FprintfIfNotEmpty(dockerCli.Out(), "No Proxy: %s\n", info.NoProxy)
if info.IndexServerAddress != "" {
u := dockerCli.ConfigFile().AuthConfigs[info.IndexServerAddress].Username
if len(u) > 0 {
fmt.Fprintf(dockerCli.Out(), "Username: %v\n", u)
}
fmt.Fprintf(dockerCli.Out(), "Registry: %v\n", info.IndexServerAddress)
}
// Only output these warnings if the server does not support these features
if info.OSType != "windows" {
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")
}
}
if info.Labels != nil {
fmt.Fprintln(dockerCli.Out(), "Labels:")
for _, attribute := range info.Labels {
fmt.Fprintf(dockerCli.Out(), " %s\n", attribute)
}
}
ioutils.FprintfIfTrue(dockerCli.Out(), "Experimental: %v\n", info.ExperimentalBuild)
if info.ClusterStore != "" {
fmt.Fprintf(dockerCli.Out(), "Cluster Store: %s\n", info.ClusterStore)
}
if info.ClusterAdvertise != "" {
fmt.Fprintf(dockerCli.Out(), "Cluster Advertise: %s\n", 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 == false {
fmt.Fprintf(dockerCli.Out(), " %s\n", 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.Fprintf(dockerCli.Out(), " %s\n", mirror)
}
}
fmt.Fprintf(dockerCli.Out(), "Live Restore Enabled: %v\n", info.LiveRestoreEnabled)
return nil
}
func formatInfo(dockerCli *command.DockerCli, 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
}