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|
// +build varlink,!remoteclient
package main
import (
"fmt"
"os"
"path/filepath"
"time"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/pkg/adapter"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/util"
iopodman "github.com/containers/libpod/pkg/varlink"
"github.com/containers/libpod/pkg/varlinkapi"
"github.com/containers/libpod/version"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/varlink/go/varlink"
)
var (
varlinkCommand cliconfig.VarlinkValues
varlinkDescription = `Run varlink interface. Podman varlink listens on the specified unix domain socket for incoming connects.
Tools speaking varlink protocol can remotely manage pods, containers and images.
`
_varlinkCommand = &cobra.Command{
Use: "varlink [flags] [URI]",
Short: "Run varlink interface",
Long: varlinkDescription,
RunE: func(cmd *cobra.Command, args []string) error {
varlinkCommand.InputArgs = args
varlinkCommand.GlobalFlags = MainGlobalOpts
return varlinkCmd(&varlinkCommand)
},
Example: `podman varlink unix:/run/podman/io.podman
podman varlink --timeout 5000 unix:/run/podman/io.podman`,
}
)
func init() {
varlinkCommand.Command = _varlinkCommand
varlinkCommand.SetHelpTemplate(HelpTemplate())
varlinkCommand.SetUsageTemplate(UsageTemplate())
flags := varlinkCommand.Flags()
flags.Int64VarP(&varlinkCommand.Timeout, "timeout", "t", 1000, "Time until the varlink session expires in milliseconds. Use 0 to disable the timeout")
}
func varlinkCmd(c *cliconfig.VarlinkValues) error {
varlinkURI := adapter.DefaultVarlinkAddress
if rootless.IsRootless() {
xdg, err := util.GetRuntimeDir()
if err != nil {
return err
}
socketDir := filepath.Join(xdg, "podman/io.podman")
if _, err := os.Stat(filepath.Dir(socketDir)); os.IsNotExist(err) {
if err := os.Mkdir(filepath.Dir(socketDir), 0755); err != nil {
return err
}
}
varlinkURI = fmt.Sprintf("unix:%s", socketDir)
}
args := c.InputArgs
if len(args) > 1 {
return errors.Errorf("too many arguments. You may optionally provide 1")
}
if len(args) > 0 {
varlinkURI = args[0]
}
logrus.Debugf("Using varlink socket: %s", varlinkURI)
timeout := time.Duration(c.Timeout) * time.Millisecond
// Create a single runtime for varlink
runtime, err := libpodruntime.GetRuntimeDisableFDs(getContext(), &c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.DeferredShutdown(false)
var varlinkInterfaces = []*iopodman.VarlinkInterface{varlinkapi.New(c.PodmanCommand.Command, runtime)}
// Register varlink service. The metadata can be retrieved with:
// $ varlink info [varlink address URI]
service, err := varlink.NewService(
"Atomic",
"podman",
version.Version,
"https://github.com/containers/libpod",
)
if err != nil {
return errors.Wrapf(err, "unable to create new varlink service")
}
for _, i := range varlinkInterfaces {
if err := service.RegisterInterface(i); err != nil {
return errors.Errorf("unable to register varlink interface %v", i)
}
}
// Run the varlink server at the given address
if err = service.Listen(varlinkURI, timeout); err != nil {
switch err.(type) {
case varlink.ServiceTimeoutError:
logrus.Infof("varlink service expired (use --timeout to increase session time beyond %d ms, 0 means never timeout)", c.Int64("timeout"))
return nil
default:
return errors.Wrapf(err, "unable to start varlink service")
}
}
return nil
}
|
