runtime: Handle the transient store options

This handles the transient store options from the container/storage
configuration in the runtime/engine.

Changes are:
 * Print transient store status in `podman info`
 * Print transient store status in runtime debug output
 * Add --transient-store argument to override config option
 * Propagate config state to conmon cleanup args so the callback podman
   gets the same config.

Note: This doesn't really change any behaviour yet (other than the changes
in containers/storage).

Signed-off-by: Alexander Larsson <alexl@redhat.com>

pkg/domain/entities/engine.go

@@ -50,9 +50,10 @@ type PodmanConfig struct {
 	Trace                    bool           // Hidden: Trace execution
 	URI                      string         // URI to RESTful API Service
 
-	Runroot       string
-	StorageDriver string
-	StorageOpts   []string
-	SSHMode       string
-	MachineMode   bool
+	Runroot        string
+	StorageDriver  string
+	StorageOpts    []string
+	SSHMode        string
+	MachineMode    bool
+	TransientStore bool
 }

pkg/domain/infra/runtime_libpod.go

@@ -171,6 +171,9 @@ func getRuntime(ctx context.Context, fs *flag.FlagSet, opts *engineOpts) (*libpo
 			storageOpts.GraphDriverOptions = cfg.StorageOpts
 		}
 	}
+	if fs.Changed("transient-store") {
+		options = append(options, libpod.WithTransientStore(cfg.TransientStore))
+	}
 	if opts.migrate {
 		options = append(options, libpod.WithMigrate())
 		if opts.name != "" {

pkg/specgenutil/util.go

@@ -282,6 +282,7 @@ func CreateExitCommandArgs(storageConfig storageTypes.StoreOptions, config *conf
 		"--network-config-dir", config.Network.NetworkConfigDir,
 		"--network-backend", config.Network.NetworkBackend,
 		"--volumepath", config.Engine.VolumePath,
+		fmt.Sprintf("--transient-store=%t", storageConfig.TransientStore),
 	}
 	if config.Engine.OCIRuntime != "" {
 		command = append(command, []string{"--runtime", config.Engine.OCIRuntime}...)