package main import ( "fmt" "io" "os" "strings" "github.com/containers/image/types" "github.com/containers/libpod/cmd/podman/cliconfig" "github.com/containers/libpod/cmd/podman/libpodruntime" "github.com/containers/libpod/cmd/podman/shared" "github.com/containers/libpod/libpod/image" "github.com/containers/libpod/utils" "github.com/pkg/errors" "github.com/sirupsen/logrus" "github.com/spf13/cobra" ) var ( runlabelCommand cliconfig.RunlabelValues runlabelDescription = ` Executes a command as described by a container image label. ` _runlabelCommand = &cobra.Command{ Use: "runlabel", Short: "Execute the command described by an image label", Long: runlabelDescription, RunE: func(cmd *cobra.Command, args []string) error { runlabelCommand.InputArgs = args runlabelCommand.GlobalFlags = MainGlobalOpts return runlabelCmd(&runlabelCommand) }, Example: `podman container runlabel run imageID podman container runlabel --pull install imageID arg1 arg2 podman container runlabel --display run myImage`, } ) func init() { runlabelCommand.Command = _runlabelCommand runlabelCommand.SetUsageTemplate(UsageTemplate()) flags := runlabelCommand.Flags() flags.StringVar(&runlabelCommand.Authfile, "authfile", "", "Path of the authentication file. Default is ${XDG_RUNTIME_DIR}/containers/auth.json. Use REGISTRY_AUTH_FILE environment variable to override") flags.StringVar(&runlabelCommand.CertDir, "cert-dir", "", "`Pathname` of a directory containing TLS certificates and keys") flags.StringVar(&runlabelCommand.Creds, "creds", "", "`Credentials` (USERNAME:PASSWORD) to use for authenticating to a registry") flags.BoolVar(&runlabelCommand.Display, "display", false, "Preview the command that the label would run") flags.StringVar(&runlabelCommand.Name, "name", "", "Assign a name to the container") flags.StringVar(&runlabelCommand.Opt1, "opt1", "", "Optional parameter to pass for install") flags.StringVar(&runlabelCommand.Opt2, "opt2", "", "Optional parameter to pass for install") flags.StringVar(&runlabelCommand.Opt3, "opt3", "", "Optional parameter to pass for install") flags.MarkHidden("opt1") flags.MarkHidden("opt2") flags.MarkHidden("opt3") flags.BoolVarP(&runlabelCommand.Pull, "pull", "p", false, "Pull the image if it does not exist locally prior to executing the label contents") flags.BoolVarP(&runlabelCommand.Quiet, "quiet", "q", false, "Suppress output information when installing images") flags.StringVar(&runlabelCommand.SignaturePolicy, "signature-policy", "", "`Pathname` of signature policy file (not usually used)") flags.BoolVar(&runlabelCommand.TlsVerify, "tls-verify", true, "Require HTTPS and verify certificates when contacting registries (default: true)") } // installCmd gets the data from the command line and calls installImage // to copy an image from a registry to a local machine func runlabelCmd(c *cliconfig.RunlabelValues) error { var ( imageName string stdErr, stdOut io.Writer stdIn io.Reader extraArgs []string ) // Evil images could trick into recursively executing the runlabel // command. Avoid this by setting the "PODMAN_RUNLABEL_NESTED" env // variable when executing a label first. nested := os.Getenv("PODMAN_RUNLABEL_NESTED") if nested == "1" { return fmt.Errorf("nested runlabel calls: runlabels cannot execute the runlabel command") } opts := make(map[string]string) runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand) if err != nil { return errors.Wrapf(err, "could not get runtime") } defer runtime.Shutdown(false) args := c.InputArgs if len(args) < 2 { logrus.Errorf("the runlabel command requires at least 2 arguments: LABEL IMAGE") return nil } if c.Display && c.Quiet { return errors.Errorf("the display and quiet flags cannot be used together.") } if len(args) > 2 { extraArgs = args[2:] } pull := c.Pull label := args[0] runlabelImage := args[1] if c.Flag("opt1").Changed { opts["opt1"] = c.Opt1 } if c.Flag("opt2").Changed { opts["opt2"] = c.Opt2 } if c.Flag("opt3").Changed { opts["opt3"] = c.Opt3 } ctx := getContext() stdErr = os.Stderr stdOut = os.Stdout stdIn = os.Stdin if c.Quiet { stdErr = nil stdOut = nil stdIn = nil } dockerRegistryOptions := image.DockerRegistryOptions{ DockerCertPath: c.CertDir, } if c.Flag("tls-verify").Changed { dockerRegistryOptions.DockerInsecureSkipTLSVerify = types.NewOptionalBool(!c.TlsVerify) } authfile := getAuthFile(c.Authfile) runLabel, imageName, err := shared.GetRunlabel(label, runlabelImage, ctx, runtime, pull, c.Creds, dockerRegistryOptions, authfile, c.SignaturePolicy, stdOut) if err != nil { return err } if runLabel == "" { return errors.Errorf("%s does not have a label of %s", runlabelImage, label) } cmd, env, err := shared.GenerateRunlabelCommand(runLabel, imageName, c.Name, opts, extraArgs) if err != nil { return err } if !c.Quiet { fmt.Printf("Command: %s\n", strings.Join(cmd, " ")) if c.Display { return nil } } return utils.ExecCmdWithStdStreams(stdIn, stdOut, stdErr, env, cmd[0], cmd[1:]...) }