mirror of https://github.com/docker/cli.git
567 lines
19 KiB
Go
567 lines
19 KiB
Go
package system
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import (
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"context"
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"fmt"
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"io"
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"regexp"
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"sort"
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"strings"
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"github.com/docker/cli/cli"
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pluginmanager "github.com/docker/cli/cli-plugins/manager"
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"github.com/docker/cli/cli/command"
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"github.com/docker/cli/cli/command/completion"
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"github.com/docker/cli/cli/command/formatter"
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"github.com/docker/cli/cli/debug"
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flagsHelper "github.com/docker/cli/cli/flags"
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"github.com/docker/cli/templates"
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"github.com/docker/docker/api/types/swarm"
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"github.com/docker/docker/api/types/system"
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"github.com/docker/docker/api/types/versions"
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"github.com/docker/docker/registry"
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"github.com/docker/go-units"
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"github.com/spf13/cobra"
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)
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type infoOptions struct {
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format string
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}
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type clientInfo struct {
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Debug bool
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clientVersion
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Plugins []pluginmanager.Plugin
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Warnings []string
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}
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type info struct {
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// This field should/could be ServerInfo but is anonymous to
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// preserve backwards compatibility in the JSON rendering
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// which has ServerInfo immediately within the top-level
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// object.
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*system.Info `json:",omitempty"`
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ServerErrors []string `json:",omitempty"`
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UserName string `json:"-"`
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ClientInfo *clientInfo `json:",omitempty"`
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ClientErrors []string `json:",omitempty"`
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}
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func (i *info) clientPlatform() string {
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if i.ClientInfo != nil && i.ClientInfo.Platform != nil {
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return i.ClientInfo.Platform.Name
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}
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return ""
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}
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// NewInfoCommand creates a new cobra.Command for `docker info`
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func NewInfoCommand(dockerCli command.Cli) *cobra.Command {
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var opts infoOptions
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cmd := &cobra.Command{
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Use: "info [OPTIONS]",
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Short: "Display system-wide information",
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Args: cli.NoArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runInfo(cmd, dockerCli, &opts)
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},
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Annotations: map[string]string{
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"category-top": "12",
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"aliases": "docker system info, docker info",
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},
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ValidArgsFunction: completion.NoComplete,
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}
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cmd.Flags().StringVarP(&opts.format, "format", "f", "", flagsHelper.InspectFormatHelp)
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return cmd
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}
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func runInfo(cmd *cobra.Command, dockerCli command.Cli, opts *infoOptions) error {
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info := info{
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ClientInfo: &clientInfo{
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// Don't pass a dockerCLI to newClientVersion(), because we currently
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// don't include negotiated API version, and want to avoid making an
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// API connection when only printing the Client section.
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clientVersion: newClientVersion(dockerCli.CurrentContext(), nil),
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Debug: debug.IsEnabled(),
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},
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Info: &system.Info{},
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}
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if plugins, err := pluginmanager.ListPlugins(dockerCli, cmd.Root()); err == nil {
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info.ClientInfo.Plugins = plugins
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} else {
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info.ClientErrors = append(info.ClientErrors, err.Error())
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}
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if needsServerInfo(opts.format, info) {
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ctx := context.Background()
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if dinfo, err := dockerCli.Client().Info(ctx); err == nil {
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info.Info = &dinfo
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} else {
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info.ServerErrors = append(info.ServerErrors, err.Error())
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if opts.format == "" {
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// reset the server info to prevent printing "empty" Server info
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// and warnings, but don't reset it if a custom format was specified
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// to prevent errors from Go's template parsing during format.
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info.Info = nil
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} else {
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// if a format is provided, print the error, as it may be hidden
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// otherwise if the template doesn't include the ServerErrors field.
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fprintln(dockerCli.Err(), err)
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}
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}
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}
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if opts.format == "" {
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info.UserName = dockerCli.ConfigFile().AuthConfigs[registry.IndexServer].Username
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info.ClientInfo.APIVersion = dockerCli.CurrentVersion()
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return prettyPrintInfo(dockerCli, info)
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}
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return formatInfo(dockerCli.Out(), info, opts.format)
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}
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// placeHolders does a rudimentary match for possible placeholders in a
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// template, matching a '.', followed by an letter (a-z/A-Z).
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var placeHolders = regexp.MustCompile(`\.[a-zA-Z]`)
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// needsServerInfo detects if the given template uses any server information.
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// If only client-side information is used in the template, we can skip
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// connecting to the daemon. This allows (e.g.) to only get cli-plugin
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// information, without also making a (potentially expensive) API call.
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func needsServerInfo(template string, info info) bool {
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if len(template) == 0 || placeHolders.FindString(template) == "" {
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// The template is empty, or does not contain formatting fields
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// (e.g. `table` or `raw` or `{{ json .}}`). Assume we need server-side
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// information to render it.
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return true
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}
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// A template is provided and has at least one field set.
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tmpl, err := templates.NewParse("", template)
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if err != nil {
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// ignore parsing errors here, and let regular code handle them
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return true
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}
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type sparseInfo struct {
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ClientInfo *clientInfo `json:",omitempty"`
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ClientErrors []string `json:",omitempty"`
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}
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// This constructs an "info" object that only has the client-side fields.
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err = tmpl.Execute(io.Discard, sparseInfo{
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ClientInfo: info.ClientInfo,
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ClientErrors: info.ClientErrors,
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})
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// If executing the template failed, it means the template needs
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// server-side information as well. If it succeeded without server-side
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// information, we don't need to make API calls to collect that information.
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return err != nil
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}
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func prettyPrintInfo(streams command.Streams, info info) error {
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// Only append the platform info if it's not empty, to prevent printing a trailing space.
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if p := info.clientPlatform(); p != "" {
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fprintln(streams.Out(), "Client:", p)
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} else {
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fprintln(streams.Out(), "Client:")
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}
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if info.ClientInfo != nil {
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prettyPrintClientInfo(streams, *info.ClientInfo)
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}
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for _, err := range info.ClientErrors {
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fprintln(streams.Err(), "ERROR:", err)
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}
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fprintln(streams.Out())
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fprintln(streams.Out(), "Server:")
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if info.Info != nil {
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for _, err := range prettyPrintServerInfo(streams, &info) {
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info.ServerErrors = append(info.ServerErrors, err.Error())
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}
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}
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for _, err := range info.ServerErrors {
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fprintln(streams.Err(), "ERROR:", err)
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}
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if len(info.ServerErrors) > 0 || len(info.ClientErrors) > 0 {
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return fmt.Errorf("errors pretty printing info")
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}
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return nil
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}
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func prettyPrintClientInfo(streams command.Streams, info clientInfo) {
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fprintlnNonEmpty(streams.Out(), " Version: ", info.Version)
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fprintln(streams.Out(), " Context: ", info.Context)
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fprintln(streams.Out(), " Debug Mode:", info.Debug)
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if len(info.Plugins) > 0 {
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fprintln(streams.Out(), " Plugins:")
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for _, p := range info.Plugins {
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if p.Err == nil {
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fprintf(streams.Out(), " %s: %s (%s)\n", p.Name, p.ShortDescription, p.Vendor)
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fprintlnNonEmpty(streams.Out(), " Version: ", p.Version)
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fprintlnNonEmpty(streams.Out(), " Path: ", p.Path)
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} else {
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info.Warnings = append(info.Warnings, fmt.Sprintf("WARNING: Plugin %q is not valid: %s", p.Path, p.Err))
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}
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}
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}
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if len(info.Warnings) > 0 {
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fprintln(streams.Err(), strings.Join(info.Warnings, "\n"))
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}
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}
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//nolint:gocyclo
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func prettyPrintServerInfo(streams command.Streams, info *info) []error {
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var errs []error
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output := streams.Out()
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fprintln(output, " Containers:", info.Containers)
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fprintln(output, " Running:", info.ContainersRunning)
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fprintln(output, " Paused:", info.ContainersPaused)
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fprintln(output, " Stopped:", info.ContainersStopped)
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fprintln(output, " Images:", info.Images)
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fprintlnNonEmpty(output, " Server Version:", info.ServerVersion)
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fprintlnNonEmpty(output, " Storage Driver:", info.Driver)
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if info.DriverStatus != nil {
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for _, pair := range info.DriverStatus {
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fprintf(output, " %s: %s\n", pair[0], pair[1])
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}
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}
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if info.SystemStatus != nil {
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for _, pair := range info.SystemStatus {
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fprintf(output, " %s: %s\n", pair[0], pair[1])
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}
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}
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fprintlnNonEmpty(output, " Logging Driver:", info.LoggingDriver)
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fprintlnNonEmpty(output, " Cgroup Driver:", info.CgroupDriver)
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fprintlnNonEmpty(output, " Cgroup Version:", info.CgroupVersion)
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fprintln(output, " Plugins:")
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fprintln(output, " Volume:", strings.Join(info.Plugins.Volume, " "))
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fprintln(output, " Network:", strings.Join(info.Plugins.Network, " "))
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if len(info.Plugins.Authorization) != 0 {
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fprintln(output, " Authorization:", strings.Join(info.Plugins.Authorization, " "))
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}
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fprintln(output, " Log:", strings.Join(info.Plugins.Log, " "))
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if len(info.CDISpecDirs) > 0 {
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fprintln(output, " CDI spec directories:")
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for _, dir := range info.CDISpecDirs {
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fprintf(output, " %s\n", dir)
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}
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}
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fprintln(output, " Swarm:", info.Swarm.LocalNodeState)
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printSwarmInfo(output, *info.Info)
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if len(info.Runtimes) > 0 {
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names := make([]string, 0, len(info.Runtimes))
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for name := range info.Runtimes {
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names = append(names, name)
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}
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fprintln(output, " Runtimes:", strings.Join(names, " "))
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fprintln(output, " Default Runtime:", info.DefaultRuntime)
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}
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if info.OSType == "linux" {
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fprintln(output, " Init Binary:", info.InitBinary)
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for _, ci := range []struct {
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Name string
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Commit system.Commit
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}{
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{"containerd", info.ContainerdCommit},
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{"runc", info.RuncCommit},
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{"init", info.InitCommit},
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} {
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fprintf(output, " %s version: %s", ci.Name, ci.Commit.ID)
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if ci.Commit.ID != ci.Commit.Expected {
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fprintf(output, " (expected: %s)", ci.Commit.Expected)
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}
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fprintln(output)
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}
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if len(info.SecurityOptions) != 0 {
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if kvs, err := system.DecodeSecurityOptions(info.SecurityOptions); err != nil {
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errs = append(errs, err)
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} else {
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fprintln(output, " Security Options:")
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for _, so := range kvs {
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fprintln(output, " "+so.Name)
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for _, o := range so.Options {
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switch o.Key {
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case "profile":
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fprintln(output, " Profile:", o.Value)
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}
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}
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}
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}
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}
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}
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// Isolation only has meaning on a Windows daemon.
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if info.OSType == "windows" {
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fprintln(output, " Default Isolation:", info.Isolation)
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}
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fprintlnNonEmpty(output, " Kernel Version:", info.KernelVersion)
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fprintlnNonEmpty(output, " Operating System:", info.OperatingSystem)
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fprintlnNonEmpty(output, " OSType:", info.OSType)
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fprintlnNonEmpty(output, " Architecture:", info.Architecture)
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fprintln(output, " CPUs:", info.NCPU)
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fprintln(output, " Total Memory:", units.BytesSize(float64(info.MemTotal)))
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fprintlnNonEmpty(output, " Name:", info.Name)
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fprintlnNonEmpty(output, " ID:", info.ID)
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fprintln(output, " Docker Root Dir:", info.DockerRootDir)
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fprintln(output, " Debug Mode:", info.Debug)
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// The daemon collects this information regardless if "debug" is
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// enabled. Print the debugging information if either the daemon,
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// or the client has debug enabled. We should probably improve this
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// logic and print any of these if set (but some special rules are
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// needed for file-descriptors, which may use "-1".
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if info.Debug || debug.IsEnabled() {
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fprintln(output, " File Descriptors:", info.NFd)
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fprintln(output, " Goroutines:", info.NGoroutines)
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fprintln(output, " System Time:", info.SystemTime)
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fprintln(output, " EventsListeners:", info.NEventsListener)
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}
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fprintlnNonEmpty(output, " HTTP Proxy:", info.HTTPProxy)
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fprintlnNonEmpty(output, " HTTPS Proxy:", info.HTTPSProxy)
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fprintlnNonEmpty(output, " No Proxy:", info.NoProxy)
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fprintlnNonEmpty(output, " Username:", info.UserName)
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if len(info.Labels) > 0 {
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fprintln(output, " Labels:")
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for _, lbl := range info.Labels {
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fprintln(output, " "+lbl)
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}
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}
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fprintln(output, " Experimental:", info.ExperimentalBuild)
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if info.RegistryConfig != nil && (len(info.RegistryConfig.InsecureRegistryCIDRs) > 0 || len(info.RegistryConfig.IndexConfigs) > 0) {
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fprintln(output, " Insecure Registries:")
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for _, registryConfig := range info.RegistryConfig.IndexConfigs {
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if !registryConfig.Secure {
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fprintln(output, " "+registryConfig.Name)
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}
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}
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for _, registryConfig := range info.RegistryConfig.InsecureRegistryCIDRs {
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mask, _ := registryConfig.Mask.Size()
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fprintf(output, " %s/%d\n", registryConfig.IP.String(), mask)
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}
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}
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if info.RegistryConfig != nil && len(info.RegistryConfig.Mirrors) > 0 {
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fprintln(output, " Registry Mirrors:")
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for _, mirror := range info.RegistryConfig.Mirrors {
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fprintln(output, " "+mirror)
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}
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}
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fprintln(output, " Live Restore Enabled:", info.LiveRestoreEnabled)
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if info.ProductLicense != "" {
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fprintln(output, " Product License:", info.ProductLicense)
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}
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if info.DefaultAddressPools != nil && len(info.DefaultAddressPools) > 0 {
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fprintln(output, " Default Address Pools:")
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for _, pool := range info.DefaultAddressPools {
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fprintf(output, " Base: %s, Size: %d\n", pool.Base, pool.Size)
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}
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}
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fprintln(output)
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printServerWarnings(streams.Err(), info)
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return errs
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}
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//nolint:gocyclo
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func printSwarmInfo(output io.Writer, info system.Info) {
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if info.Swarm.LocalNodeState == swarm.LocalNodeStateInactive || info.Swarm.LocalNodeState == swarm.LocalNodeStateLocked {
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return
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}
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fprintln(output, " NodeID:", info.Swarm.NodeID)
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if info.Swarm.Error != "" {
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fprintln(output, " Error:", info.Swarm.Error)
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}
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fprintln(output, " Is Manager:", info.Swarm.ControlAvailable)
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if info.Swarm.Cluster != nil && info.Swarm.ControlAvailable && info.Swarm.Error == "" && info.Swarm.LocalNodeState != swarm.LocalNodeStateError {
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fprintln(output, " ClusterID:", info.Swarm.Cluster.ID)
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fprintln(output, " Managers:", info.Swarm.Managers)
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fprintln(output, " Nodes:", info.Swarm.Nodes)
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var strAddrPool strings.Builder
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if info.Swarm.Cluster.DefaultAddrPool != nil {
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for _, p := range info.Swarm.Cluster.DefaultAddrPool {
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strAddrPool.WriteString(p + " ")
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}
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fprintln(output, " Default Address Pool:", strAddrPool.String())
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fprintln(output, " SubnetSize:", info.Swarm.Cluster.SubnetSize)
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}
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if info.Swarm.Cluster.DataPathPort > 0 {
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fprintln(output, " Data Path Port:", info.Swarm.Cluster.DataPathPort)
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}
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fprintln(output, " Orchestration:")
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taskHistoryRetentionLimit := int64(0)
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if info.Swarm.Cluster.Spec.Orchestration.TaskHistoryRetentionLimit != nil {
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taskHistoryRetentionLimit = *info.Swarm.Cluster.Spec.Orchestration.TaskHistoryRetentionLimit
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}
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fprintln(output, " Task History Retention Limit:", taskHistoryRetentionLimit)
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fprintln(output, " Raft:")
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fprintln(output, " Snapshot Interval:", info.Swarm.Cluster.Spec.Raft.SnapshotInterval)
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if info.Swarm.Cluster.Spec.Raft.KeepOldSnapshots != nil {
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fprintf(output, " Number of Old Snapshots to Retain: %d\n", *info.Swarm.Cluster.Spec.Raft.KeepOldSnapshots)
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}
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fprintln(output, " Heartbeat Tick:", info.Swarm.Cluster.Spec.Raft.HeartbeatTick)
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fprintln(output, " Election Tick:", info.Swarm.Cluster.Spec.Raft.ElectionTick)
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fprintln(output, " Dispatcher:")
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fprintln(output, " Heartbeat Period:", units.HumanDuration(info.Swarm.Cluster.Spec.Dispatcher.HeartbeatPeriod))
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fprintln(output, " CA Configuration:")
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fprintln(output, " Expiry Duration:", units.HumanDuration(info.Swarm.Cluster.Spec.CAConfig.NodeCertExpiry))
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fprintln(output, " Force Rotate:", info.Swarm.Cluster.Spec.CAConfig.ForceRotate)
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if caCert := strings.TrimSpace(info.Swarm.Cluster.Spec.CAConfig.SigningCACert); caCert != "" {
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fprintf(output, " Signing CA Certificate: \n%s\n\n", caCert)
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}
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if len(info.Swarm.Cluster.Spec.CAConfig.ExternalCAs) > 0 {
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fprintln(output, " External CAs:")
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for _, entry := range info.Swarm.Cluster.Spec.CAConfig.ExternalCAs {
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fprintf(output, " %s: %s\n", entry.Protocol, entry.URL)
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}
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}
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fprintln(output, " Autolock Managers:", info.Swarm.Cluster.Spec.EncryptionConfig.AutoLockManagers)
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fprintln(output, " Root Rotation In Progress:", info.Swarm.Cluster.RootRotationInProgress)
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}
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fprintln(output, " Node Address:", info.Swarm.NodeAddr)
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if len(info.Swarm.RemoteManagers) > 0 {
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managers := []string{}
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for _, entry := range info.Swarm.RemoteManagers {
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managers = append(managers, entry.Addr)
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}
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sort.Strings(managers)
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fprintln(output, " Manager Addresses:")
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for _, entry := range managers {
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fprintf(output, " %s\n", entry)
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}
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}
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}
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func printServerWarnings(stdErr io.Writer, info *info) {
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if versions.LessThan(info.ClientInfo.APIVersion, "1.42") {
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printSecurityOptionsWarnings(stdErr, *info.Info)
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}
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if len(info.Warnings) > 0 {
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fprintln(stdErr, strings.Join(info.Warnings, "\n"))
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return
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}
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// daemon didn't return warnings. Fallback to old behavior
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printServerWarningsLegacy(stdErr, *info.Info)
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}
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// printSecurityOptionsWarnings prints warnings based on the security options
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|
// returned by the daemon.
|
|
// DEPRECATED: warnings are now generated by the daemon, and returned in
|
|
// info.Warnings. This function is used to provide backward compatibility with
|
|
// daemons that do not provide these warnings. No new warnings should be added
|
|
// here.
|
|
func printSecurityOptionsWarnings(stdErr io.Writer, info system.Info) {
|
|
if info.OSType == "windows" {
|
|
return
|
|
}
|
|
kvs, _ := system.DecodeSecurityOptions(info.SecurityOptions)
|
|
for _, so := range kvs {
|
|
if so.Name != "seccomp" {
|
|
continue
|
|
}
|
|
for _, o := range so.Options {
|
|
if o.Key == "profile" && o.Value != "default" && o.Value != "builtin" {
|
|
_, _ = fmt.Fprintln(stdErr, "WARNING: You're not using the default seccomp profile")
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// printServerWarningsLegacy generates warnings based on information returned by the daemon.
|
|
// DEPRECATED: warnings are now generated by the daemon, and returned in
|
|
// info.Warnings. This function is used to provide backward compatibility with
|
|
// daemons that do not provide these warnings. No new warnings should be added
|
|
// here.
|
|
func printServerWarningsLegacy(stdErr io.Writer, info system.Info) {
|
|
if info.OSType == "windows" {
|
|
return
|
|
}
|
|
if !info.MemoryLimit {
|
|
fprintln(stdErr, "WARNING: No memory limit support")
|
|
}
|
|
if !info.SwapLimit {
|
|
fprintln(stdErr, "WARNING: No swap limit support")
|
|
}
|
|
if !info.OomKillDisable && info.CgroupVersion != "2" {
|
|
fprintln(stdErr, "WARNING: No oom kill disable support")
|
|
}
|
|
if !info.CPUCfsQuota {
|
|
fprintln(stdErr, "WARNING: No cpu cfs quota support")
|
|
}
|
|
if !info.CPUCfsPeriod {
|
|
fprintln(stdErr, "WARNING: No cpu cfs period support")
|
|
}
|
|
if !info.CPUShares {
|
|
fprintln(stdErr, "WARNING: No cpu shares support")
|
|
}
|
|
if !info.CPUSet {
|
|
fprintln(stdErr, "WARNING: No cpuset support")
|
|
}
|
|
if !info.IPv4Forwarding {
|
|
fprintln(stdErr, "WARNING: IPv4 forwarding is disabled")
|
|
}
|
|
if !info.BridgeNfIptables {
|
|
fprintln(stdErr, "WARNING: bridge-nf-call-iptables is disabled")
|
|
}
|
|
if !info.BridgeNfIP6tables {
|
|
fprintln(stdErr, "WARNING: bridge-nf-call-ip6tables is disabled")
|
|
}
|
|
}
|
|
|
|
func formatInfo(output io.Writer, info info, format string) error {
|
|
if format == formatter.JSONFormatKey {
|
|
format = formatter.JSONFormat
|
|
}
|
|
|
|
// Ensure slice/array fields render as `[]` not `null`
|
|
if info.ClientInfo != nil && info.ClientInfo.Plugins == nil {
|
|
info.ClientInfo.Plugins = make([]pluginmanager.Plugin, 0)
|
|
}
|
|
|
|
tmpl, err := templates.Parse(format)
|
|
if err != nil {
|
|
return cli.StatusError{
|
|
StatusCode: 64,
|
|
Status: "template parsing error: " + err.Error(),
|
|
}
|
|
}
|
|
err = tmpl.Execute(output, info)
|
|
fprintln(output)
|
|
return err
|
|
}
|
|
|
|
func fprintf(w io.Writer, format string, a ...any) {
|
|
_, _ = fmt.Fprintf(w, format, a...)
|
|
}
|
|
|
|
func fprintln(w io.Writer, a ...any) {
|
|
_, _ = fmt.Fprintln(w, a...)
|
|
}
|
|
|
|
func fprintlnNonEmpty(w io.Writer, label, value string) {
|
|
if value != "" {
|
|
_, _ = fmt.Fprintln(w, label, value)
|
|
}
|
|
}
|