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|
//go:build amd64 || arm64
// +build amd64 arm64
package machine
import (
"errors"
"net"
"os"
"path/filepath"
"regexp"
"strings"
"sync"
"time"
"github.com/containers/podman/v4/cmd/podman/registry"
"github.com/containers/podman/v4/cmd/podman/validate"
"github.com/containers/podman/v4/libpod/events"
"github.com/containers/podman/v4/pkg/machine"
"github.com/containers/podman/v4/pkg/util"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
var (
// Pull in configured json library
json = registry.JSONLibrary()
sockPaths []string // Paths to unix domain sockets for publishing
openEventSock sync.Once // Singleton support for opening sockets as needed
sockets []net.Conn // Opened sockets, if any
// Command: podman _machine_
machineCmd = &cobra.Command{
Use: "machine",
Short: "Manage a virtual machine",
Long: "Manage a virtual machine. Virtual machines are used to run Podman.",
PersistentPreRunE: initMachineEvents,
PersistentPostRunE: closeMachineEvents,
RunE: validate.SubCommandExists,
}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Command: machineCmd,
})
}
// autocompleteMachineSSH - Autocomplete machine ssh command.
func autocompleteMachineSSH(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
if len(args) == 0 {
return getMachines(toComplete)
}
return nil, cobra.ShellCompDirectiveDefault
}
// autocompleteMachine - Autocomplete machines.
func autocompleteMachine(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
if len(args) == 0 {
return getMachines(toComplete)
}
return nil, cobra.ShellCompDirectiveNoFileComp
}
func getMachines(toComplete string) ([]string, cobra.ShellCompDirective) {
suggestions := []string{}
provider := getSystemDefaultProvider()
machines, err := provider.List(machine.ListOptions{})
if err != nil {
cobra.CompErrorln(err.Error())
return nil, cobra.ShellCompDirectiveNoFileComp
}
for _, m := range machines {
if strings.HasPrefix(m.Name, toComplete) {
suggestions = append(suggestions, m.Name)
}
}
return suggestions, cobra.ShellCompDirectiveNoFileComp
}
func initMachineEvents(cmd *cobra.Command, _ []string) error {
logrus.Debugf("Called machine %s.PersistentPreRunE(%s)", cmd.Name(), strings.Join(os.Args, " "))
sockPaths, err := resolveEventSock()
if err != nil {
return err
}
// No sockets found, so no need to publish events...
if len(sockPaths) == 0 {
return nil
}
for _, path := range sockPaths {
conn, err := (&net.Dialer{}).DialContext(registry.Context(), "unix", path)
if err != nil {
logrus.Warnf("Failed to open event socket %q: %v", path, err)
continue
}
logrus.Debugf("Machine event socket %q found", path)
sockets = append(sockets, conn)
}
return nil
}
func resolveEventSock() ([]string, error) {
// Used mostly for testing
if sock, found := os.LookupEnv("PODMAN_MACHINE_EVENTS_SOCK"); found {
return []string{sock}, nil
}
xdg, err := util.GetRuntimeDir()
if err != nil {
logrus.Warnf("Failed to get runtime dir, machine events will not be published: %s", err)
return nil, nil
}
re := regexp.MustCompile(`machine_events.*\.sock`)
sockPaths := make([]string, 0)
fn := func(path string, info os.DirEntry, err error) error {
switch {
case err != nil:
return err
case info.IsDir():
return nil
case info.Type() != os.ModeSocket:
return nil
case !re.MatchString(info.Name()):
return nil
}
logrus.Debugf("Machine events will be published on: %q", path)
sockPaths = append(sockPaths, path)
return nil
}
if err := filepath.WalkDir(filepath.Join(xdg, "podman"), fn); err != nil {
if errors.Is(err, os.ErrNotExist) {
return nil, nil
}
return nil, err
}
return sockPaths, nil
}
func newMachineEvent(status events.Status, event events.Event) {
openEventSock.Do(func() {
// No sockets where found, so no need to publish events...
if len(sockPaths) == 0 {
return
}
for _, path := range sockPaths {
conn, err := (&net.Dialer{}).DialContext(registry.Context(), "unix", path)
if err != nil {
logrus.Warnf("Failed to open event socket %q: %v", path, err)
continue
}
logrus.Debugf("Machine event socket %q found", path)
sockets = append(sockets, conn)
}
})
event.Status = status
event.Time = time.Now()
event.Type = events.Machine
payload, err := json.Marshal(event)
if err != nil {
logrus.Errorf("Unable to format machine event: %q", err)
return
}
for _, sock := range sockets {
if _, err := sock.Write(payload); err != nil {
logrus.Errorf("Unable to write machine event: %q", err)
}
}
}
func closeMachineEvents(cmd *cobra.Command, _ []string) error {
logrus.Debugf("Called machine %s.PersistentPostRunE(%s)", cmd.Name(), strings.Join(os.Args, " "))
for _, sock := range sockets {
_ = sock.Close()
}
return nil
}
|
