podmanv2 start

add the ability to start containers

Signed-off-by: Brent Baude <bbaude@redhat.com>

5 files changed, 221 insertions, 0 deletions

diff --git a/cmd/podmanV2/containers/start.go b/cmd/podmanV2/containers/start.go
new file mode 100644
index 000000000..0ae2f6d50
--- /dev/null
+++ b/cmd/podmanV2/containers/start.go
@@ -0,0 +1,87 @@
+package containers
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/containers/libpod/cmd/podmanV2/common"
+	"github.com/containers/libpod/cmd/podmanV2/registry"
+	"github.com/containers/libpod/cmd/podmanV2/utils"
+	"github.com/containers/libpod/libpod/define"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+var (
+	startDescription = `Starts one or more containers.  The container name or ID can be used.`
+	startCommand     = &cobra.Command{
+		Use:     "start [flags] CONTAINER [CONTAINER...]",
+		Short:   "Start one or more containers",
+		Long:    startDescription,
+		RunE:    start,
+		PreRunE: preRunE,
+		Args:    cobra.MinimumNArgs(1),
+		Example: `podman start --latest
+  podman start 860a4b231279 5421ab43b45
+  podman start --interactive --attach imageID`,
+	}
+)
+
+var (
+	startOptions entities.ContainerStartOptions
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Mode:    []entities.EngineMode{entities.ABIMode},
+		Command: startCommand,
+	})
+	flags := startCommand.Flags()
+	flags.BoolVarP(&startOptions.Attach, "attach", "a", false, "Attach container's STDOUT and STDERR")
+	flags.StringVar(&startOptions.DetachKeys, "detach-keys", common.GetDefaultDetachKeys(), "Select the key sequence for detaching a container. Format is a single character `[a-Z]` or a comma separated sequence of `ctrl-<value>`, where `<value>` is one of: `a-z`, `@`, `^`, `[`, `\\`, `]`, `^` or `_`")
+	flags.BoolVarP(&startOptions.Interactive, "interactive", "i", false, "Keep STDIN open even if not attached")
+	flags.BoolVarP(&startOptions.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
+	flags.BoolVar(&startOptions.SigProxy, "sig-proxy", false, "Proxy received signals to the process (default true if attaching, false otherwise)")
+	if registry.IsRemote() {
+		_ = flags.MarkHidden("latest")
+		_ = flags.MarkHidden("sig-proxy")
+	}
+
+}
+
+func start(cmd *cobra.Command, args []string) error {
+	var errs utils.OutputErrors
+	if len(args) > 1 && startOptions.Attach {
+		return errors.Errorf("you cannot start and attach multiple containers at once")
+	}
+
+	sigProxy := startOptions.SigProxy || startOptions.Attach
+	if cmd.Flag("sig-proxy").Changed {
+		sigProxy = startOptions.SigProxy
+	}
+
+	if sigProxy && !startOptions.Attach {
+		return errors.Wrapf(define.ErrInvalidArg, "you cannot use sig-proxy without --attach")
+	}
+	if startOptions.Attach {
+		startOptions.Stdin = os.Stdin
+		startOptions.Stderr = os.Stderr
+		startOptions.Stdout = os.Stdout
+	}
+
+	responses, err := registry.ContainerEngine().ContainerStart(registry.GetContext(), args, startOptions)
+	if err != nil {
+		return err
+	}
+
+	for _, r := range responses {
+		if r.Err == nil {
+			fmt.Println(r.Id)
+		} else {
+			errs = append(errs, r.Err)
+		}
+	}
+	// TODO need to understand an implement exitcodes
+	return errs.PrintErrors()
+}
diff --git a/pkg/domain/entities/containers.go b/pkg/domain/entities/containers.go
index cf907eb1b..6b4bb9ba2 100644
--- a/pkg/domain/entities/containers.go
+++ b/pkg/domain/entities/containers.go
@@ -186,3 +186,24 @@ type ExecOptions struct {
 	User        string
 	WorkDir     string
 }
+
+// ContainerStartOptions describes the val from the
+// CLI needed to start a container
+type ContainerStartOptions struct {
+	Attach      bool
+	DetachKeys  string
+	Interactive bool
+	Latest      bool
+	SigProxy    bool
+	Stdout      *os.File
+	Stderr      *os.File
+	Stdin       *os.File
+}
+
+// ContainerStartReport describes the response from starting
+// containers from the cli
+type ContainerStartReport struct {
+	Id       string
+	Err      error
+	ExitCode int
+}
diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index 9bf3d51de..264780771 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -21,6 +21,7 @@ type ContainerEngine interface {
 	ContainerPause(ctx context.Context, namesOrIds []string, options PauseUnPauseOptions) ([]*PauseUnpauseReport, error)
 	ContainerRestart(ctx context.Context, namesOrIds []string, options RestartOptions) ([]*RestartReport, error)
 	ContainerRm(ctx context.Context, namesOrIds []string, options RmOptions) ([]*RmReport, error)
+	ContainerStart(ctx context.Context, namesOrIds []string, options ContainerStartOptions) ([]*ContainerStartReport, error)
 	ContainerStop(ctx context.Context, namesOrIds []string, options StopOptions) ([]*StopReport, error)
 	ContainerTop(ctx context.Context, options TopOptions) (*StringSliceReport, error)
 	ContainerUnpause(ctx context.Context, namesOrIds []string, options PauseUnPauseOptions) ([]*PauseUnpauseReport, error)
diff --git a/pkg/domain/infra/abi/containers.go b/pkg/domain/infra/abi/containers.go
index b93e7665a..929c3f335 100644
--- a/pkg/domain/infra/abi/containers.go
+++ b/pkg/domain/infra/abi/containers.go
@@ -12,6 +12,7 @@ import (
 	"github.com/containers/image/v5/manifest"
 	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/libpod/define"
+	"github.com/containers/libpod/libpod/events"
 	"github.com/containers/libpod/libpod/image"
 	"github.com/containers/libpod/pkg/checkpoint"
 	"github.com/containers/libpod/pkg/domain/entities"
@@ -509,3 +510,110 @@ func (ic *ContainerEngine) ContainerExec(ctx context.Context, nameOrId string, o
 	ec, err = terminal.ExecAttachCtr(ctx, ctr, options.Tty, options.Privileged, options.Envs, options.Cmd, options.User, options.WorkDir, &options.Streams, options.PreserveFDs, options.DetachKeys)
 	return define.TranslateExecErrorToExitCode(ec, err), err
 }
+
+func (ic *ContainerEngine) ContainerStart(ctx context.Context, namesOrIds []string, options entities.ContainerStartOptions) ([]*entities.ContainerStartReport, error) {
+	var reports []*entities.ContainerStartReport
+	var exitCode = define.ExecErrorCodeGeneric
+	ctrs, err := getContainersByContext(false, options.Latest, namesOrIds, ic.Libpod)
+	if err != nil {
+		return nil, err
+	}
+	// There can only be one container if attach was used
+	for _, ctr := range ctrs {
+		ctrState, err := ctr.State()
+		if err != nil {
+			return nil, err
+		}
+		ctrRunning := ctrState == define.ContainerStateRunning
+
+		if options.Attach {
+			err = terminal.StartAttachCtr(ctx, ctr, options.Stdout, options.Stderr, options.Stdin, options.DetachKeys, options.SigProxy, !ctrRunning, ctr.PodID() != "")
+			if errors.Cause(err) == define.ErrDetach {
+				// User manually detached
+				// Exit cleanly immediately
+				reports = append(reports, &entities.ContainerStartReport{
+					Id:       ctr.ID(),
+					Err:      nil,
+					ExitCode: 0,
+				})
+				return reports, nil
+			}
+
+			if errors.Cause(err) == define.ErrWillDeadlock {
+				logrus.Debugf("Deadlock error: %v", err)
+				reports = append(reports, &entities.ContainerStartReport{
+					Id:       ctr.ID(),
+					Err:      err,
+					ExitCode: define.ExitCode(err),
+				})
+				return reports, errors.Errorf("attempting to start container %s would cause a deadlock; please run 'podman system renumber' to resolve", ctr.ID())
+			}
+
+			if ctrRunning {
+				reports = append(reports, &entities.ContainerStartReport{
+					Id:       ctr.ID(),
+					Err:      nil,
+					ExitCode: 0,
+				})
+				return reports, err
+			}
+
+			if err != nil {
+				reports = append(reports, &entities.ContainerStartReport{
+					Id:       ctr.ID(),
+					Err:      err,
+					ExitCode: exitCode,
+				})
+				return reports, errors.Wrapf(err, "unable to start container %s", ctr.ID())
+			}
+
+			if ecode, err := ctr.Wait(); err != nil {
+				if errors.Cause(err) == define.ErrNoSuchCtr {
+					// Check events
+					event, err := ic.Libpod.GetLastContainerEvent(ctr.ID(), events.Exited)
+					if err != nil {
+						logrus.Errorf("Cannot get exit code: %v", err)
+						exitCode = define.ExecErrorCodeNotFound
+					} else {
+						exitCode = event.ContainerExitCode
+					}
+				}
+			} else {
+				exitCode = int(ecode)
+			}
+			reports = append(reports, &entities.ContainerStartReport{
+				Id:       ctr.ID(),
+				Err:      err,
+				ExitCode: exitCode,
+			})
+			return reports, nil
+		} // end attach
+
+		// Start the container if it's not running already.
+		if !ctrRunning {
+			// Handle non-attach start
+			// If the container is in a pod, also set to recursively start dependencies
+			report := &entities.ContainerStartReport{
+				Id:       ctr.ID(),
+				ExitCode: 125,
+			}
+			if err := ctr.Start(ctx, ctr.PodID() != ""); err != nil {
+				//if lastError != nil {
+				//	fmt.Fprintln(os.Stderr, lastError)
+				//}
+				report.Err = err
+				if errors.Cause(err) == define.ErrWillDeadlock {
+					report.Err = errors.Wrapf(err, "please run 'podman system renumber' to resolve deadlocks")
+					reports = append(reports, report)
+					continue
+				}
+				report.Err = errors.Wrapf(err, "unable to start container %q", ctr.ID())
+				reports = append(reports, report)
+				continue
+			}
+			report.ExitCode = 0
+			reports = append(reports, report)
+		}
+	}
+	return reports, nil
+}
diff --git a/pkg/domain/infra/tunnel/containers.go b/pkg/domain/infra/tunnel/containers.go
index 1e71cba2c..4101068ba 100644
--- a/pkg/domain/infra/tunnel/containers.go
+++ b/pkg/domain/infra/tunnel/containers.go
@@ -313,3 +313,7 @@ func (ic *ContainerEngine) ContainerAttach(ctx context.Context, nameOrId string,
 func (ic *ContainerEngine) ContainerExec(ctx context.Context, nameOrId string, options entities.ExecOptions) (int, error) {
 	return 125, errors.New("not implemented")
 }
+
+func (ic *ContainerEngine) ContainerStart(ctx context.Context, namesOrIds []string, options entities.ContainerStartOptions) ([]*entities.ContainerStartReport, error) {
+	return nil, errors.New("not implemented")
+}