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|
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"
"github.com/containers/libpod/libpod/image"
"github.com/containers/libpod/pkg/util"
"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 [flags] LABEL IMAGE [ARG...]",
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
runlabelCommand.Remote = remoteclient
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.SetHelpTemplate(HelpTemplate())
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.BoolVar(&runlabelCommand.Replace, "replace", false, "Replace existing container with a new one from the image")
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.BoolP("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")
flags.MarkDeprecated("pull", "podman will pull if not found in local storage")
}
// 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(getContext(), &c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
args := c.InputArgs
if len(args) < 2 {
return errors.Errorf("the runlabel command requires at least 2 arguments: LABEL IMAGE")
}
if c.Display && c.Quiet {
return errors.Errorf("the display and quiet flags cannot be used together.")
}
if len(args) > 2 {
extraArgs = args[2:]
}
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, true, 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)
}
globalOpts := util.GetGlobalOpts(c)
cmd, env, err := shared.GenerateRunlabelCommand(runLabel, imageName, c.Name, opts, extraArgs, globalOpts)
if err != nil {
return err
}
if !c.Quiet {
fmt.Printf("command: %s\n", strings.Join(cmd, " "))
if c.Display {
return nil
}
}
// If container already exists && --replace given -- Nuke it
if c.Replace {
for i, entry := range cmd {
if entry == "--name" {
name := cmd[i+1]
ctr, err := runtime.LookupContainer(name)
if err != nil {
if errors.Cause(err) != libpod.ErrNoSuchCtr {
logrus.Debugf("Error occurred searching for container %s: %s", name, err.Error())
return err
}
} else {
logrus.Debugf("Runlabel --replace option given. Container %s will be deleted. The new container will be named %s", ctr.ID(), name)
if err := runtime.RemoveContainer(ctx, ctr, true, false); err != nil {
return err
}
}
break
}
}
}
return utils.ExecCmdWithStdStreams(stdIn, stdOut, stdErr, env, cmd[0], cmd[1:]...)
}
|
