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|
// +build linux
package system
import (
"fmt"
"net/url"
"os"
"path/filepath"
"syscall"
"time"
"github.com/containers/libpod/cmd/podman/registry"
"github.com/containers/libpod/pkg/domain/entities"
"github.com/containers/libpod/pkg/rootless"
"github.com/containers/libpod/pkg/systemd"
"github.com/containers/libpod/pkg/util"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
var (
srvDescription = `Run an API service
Enable a listening service for API access to Podman commands.
`
srvCmd = &cobra.Command{
Use: "service [flags] [URI]",
Args: cobra.MaximumNArgs(1),
Short: "Run API service",
Long: srvDescription,
RunE: service,
Example: `podman system service --time=0 unix:///tmp/podman.sock`,
}
srvArgs = struct {
Timeout int64
Varlink bool
}{}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode},
Command: srvCmd,
Parent: systemCmd,
})
flags := srvCmd.Flags()
flags.Int64VarP(&srvArgs.Timeout, "time", "t", 5, "Time until the service session expires in seconds. Use 0 to disable the timeout")
flags.BoolVar(&srvArgs.Varlink, "varlink", false, "Use legacy varlink service instead of REST")
_ = flags.MarkDeprecated("varlink", "valink API is deprecated.")
flags.SetNormalizeFunc(aliasTimeoutFlag)
}
func aliasTimeoutFlag(_ *pflag.FlagSet, name string) pflag.NormalizedName {
if name == "timeout" {
name = "time"
}
return pflag.NormalizedName(name)
}
func service(cmd *cobra.Command, args []string) error {
apiURI, err := resolveApiURI(args)
if err != nil {
return err
}
logrus.Infof("using API endpoint: '%s'", apiURI)
// Clean up any old existing unix domain socket
if len(apiURI) > 0 {
uri, err := url.Parse(apiURI)
if err != nil {
return err
}
// socket activation uses a unix:// socket in the shipped unit files but apiURI is coded as "" at this layer.
if "unix" == uri.Scheme && !registry.IsRemote() {
if err := syscall.Unlink(uri.Path); err != nil && !os.IsNotExist(err) {
return err
}
mask := syscall.Umask(0177)
defer syscall.Umask(mask)
}
}
opts := entities.ServiceOptions{
URI: apiURI,
Timeout: time.Duration(srvArgs.Timeout) * time.Second,
Command: cmd,
}
if srvArgs.Varlink {
return registry.ContainerEngine().VarlinkService(registry.GetContext(), opts)
}
logrus.Warn("This function is EXPERIMENTAL")
fmt.Fprintf(os.Stderr, "This function is EXPERIMENTAL.\n")
return restService(opts, cmd.Flags(), registry.PodmanConfig())
}
func resolveApiURI(_url []string) (string, error) {
// When determining _*THE*_ listening endpoint --
// 1) User input wins always
// 2) systemd socket activation
// 3) rootless honors XDG_RUNTIME_DIR
// 4) if varlink -- adapter.DefaultVarlinkAddress
// 5) lastly adapter.DefaultAPIAddress
if len(_url) == 0 {
if v, found := os.LookupEnv("PODMAN_SOCKET"); found {
logrus.Debugf("PODMAN_SOCKET='%s' used to determine API endpoint", v)
_url = []string{v}
}
}
switch {
case len(_url) > 0 && _url[0] != "":
return _url[0], nil
case systemd.SocketActivated():
logrus.Info("using systemd socket activation to determine API endpoint")
return "", nil
case rootless.IsRootless():
xdg, err := util.GetRuntimeDir()
if err != nil {
return "", err
}
socketName := "podman.sock"
if srvArgs.Varlink {
socketName = "io.podman"
}
socketDir := filepath.Join(xdg, "podman", socketName)
if _, err := os.Stat(filepath.Dir(socketDir)); err != nil {
if os.IsNotExist(err) {
if err := os.Mkdir(filepath.Dir(socketDir), 0755); err != nil {
return "", err
}
} else {
return "", err
}
}
return "unix:" + socketDir, nil
case srvArgs.Varlink:
return registry.DefaultVarlinkAddress, nil
default:
return registry.DefaultRootAPIAddress, nil
}
}
|
