Add more checkpoint/restore information to 'inspect'

This adds the following information to the output of 'podman inspect':

 * CheckpointedAt - time the container was checkpointed
   Only set if the container has been checkpointed

 * RestoredAt - time the container was restored
   Only set if the container has been restored

 * CheckpointLog - path to the checkpoint log file (CRIU's dump.log)
   Only set if the log file exists (--keep)

 * RestoreLog - path to the restore log file (CRIU's restore.log)
   Only set if the log file exists (--keep)

 * CheckpointPath - path to the actual (CRIU) checkpoint files
   Only set if the checkpoint files exists (--keep)

 * Restored - set to true if the container has been restored
   Only set if the container has been restored

Signed-off-by: Adrian Reber <areber@redhat.com>

5 files changed, 82 insertions, 30 deletions

diff --git a/libpod/container.go b/libpod/container.go
index 1270f2112..c746f97c7 100644
--- a/libpod/container.go
+++ b/libpod/container.go
@@ -213,6 +213,15 @@ type ContainerState struct {
 
 	// containerPlatformState holds platform-specific container state.
 	containerPlatformState
+
+	// Following checkpoint/restore related information is displayed
+	// if the container has been checkpointed or restored.
+	CheckpointedTime time.Time `json:"checkpointedTime,omitempty"`
+	RestoredTime     time.Time `json:"restoredTime,omitempty"`
+	CheckpointLog    string    `json:"checkpointLog,omitempty"`
+	CheckpointPath   string    `json:"checkpointPath,omitempty"`
+	RestoreLog       string    `json:"restoreLog,omitempty"`
+	Restored         bool      `json:"restored,omitempty"`
 }
 
 // ContainerNamedVolume is a named volume that will be mounted into the
diff --git a/libpod/container_inspect.go b/libpod/container_inspect.go
index 83b643266..439328ea8 100644
--- a/libpod/container_inspect.go
+++ b/libpod/container_inspect.go
@@ -113,20 +113,26 @@ func (c *Container) getContainerInspectData(size bool, driverData *define.Driver
 		Path:    path,
 		Args:    args,
 		State: &define.InspectContainerState{
-			OciVersion:   ctrSpec.Version,
-			Status:       runtimeInfo.State.String(),
-			Running:      runtimeInfo.State == define.ContainerStateRunning,
-			Paused:       runtimeInfo.State == define.ContainerStatePaused,
-			OOMKilled:    runtimeInfo.OOMKilled,
-			Dead:         runtimeInfo.State.String() == "bad state",
-			Pid:          runtimeInfo.PID,
-			ConmonPid:    runtimeInfo.ConmonPID,
-			ExitCode:     runtimeInfo.ExitCode,
-			Error:        "", // can't get yet
-			StartedAt:    runtimeInfo.StartedTime,
-			FinishedAt:   runtimeInfo.FinishedTime,
-			Checkpointed: runtimeInfo.Checkpointed,
-			CgroupPath:   cgroupPath,
+			OciVersion:     ctrSpec.Version,
+			Status:         runtimeInfo.State.String(),
+			Running:        runtimeInfo.State == define.ContainerStateRunning,
+			Paused:         runtimeInfo.State == define.ContainerStatePaused,
+			OOMKilled:      runtimeInfo.OOMKilled,
+			Dead:           runtimeInfo.State.String() == "bad state",
+			Pid:            runtimeInfo.PID,
+			ConmonPid:      runtimeInfo.ConmonPID,
+			ExitCode:       runtimeInfo.ExitCode,
+			Error:          "", // can't get yet
+			StartedAt:      runtimeInfo.StartedTime,
+			FinishedAt:     runtimeInfo.FinishedTime,
+			Checkpointed:   runtimeInfo.Checkpointed,
+			CgroupPath:     cgroupPath,
+			RestoredAt:     runtimeInfo.RestoredTime,
+			CheckpointedAt: runtimeInfo.CheckpointedTime,
+			Restored:       runtimeInfo.Restored,
+			CheckpointPath: runtimeInfo.CheckpointPath,
+			CheckpointLog:  runtimeInfo.CheckpointLog,
+			RestoreLog:     runtimeInfo.RestoreLog,
 		},
 		Image:           config.RootfsImageID,
 		ImageName:       config.RootfsImageName,
diff --git a/libpod/container_internal.go b/libpod/container_internal.go
index a68de3173..b7398523a 100644
--- a/libpod/container_internal.go
+++ b/libpod/container_internal.go
@@ -634,6 +634,12 @@ func resetState(state *ContainerState) {
 	state.RestartPolicyMatch = false
 	state.RestartCount = 0
 	state.Checkpointed = false
+	state.Restored = false
+	state.CheckpointedTime = time.Time{}
+	state.RestoredTime = time.Time{}
+	state.CheckpointPath = ""
+	state.CheckpointLog = ""
+	state.RestoreLog = ""
 }
 
 // Refresh refreshes the container's state after a restart.
@@ -1111,6 +1117,12 @@ func (c *Container) init(ctx context.Context, retainRetries bool) error {
 	}
 
 	c.state.Checkpointed = false
+	c.state.Restored = false
+	c.state.CheckpointedTime = time.Time{}
+	c.state.RestoredTime = time.Time{}
+	c.state.CheckpointPath = ""
+	c.state.CheckpointLog = ""
+	c.state.RestoreLog = ""
 	c.state.ExitCode = 0
 	c.state.Exited = false
 	c.state.State = define.ContainerStateCreated
diff --git a/libpod/container_internal_linux.go b/libpod/container_internal_linux.go
index f4b629a83..9e6ae9f02 100644
--- a/libpod/container_internal_linux.go
+++ b/libpod/container_internal_linux.go
@@ -1134,6 +1134,10 @@ func (c *Container) checkpoint(ctx context.Context, options ContainerCheckpointO
 		return nil, 0, err
 	}
 
+	// Setting CheckpointLog early in case there is a failure.
+	c.state.CheckpointLog = path.Join(c.bundlePath(), "dump.log")
+	c.state.CheckpointPath = c.CheckpointPath()
+
 	runtimeCheckpointDuration, err := c.ociRuntime.CheckpointContainer(c, options)
 	if err != nil {
 		return nil, 0, err
@@ -1169,6 +1173,9 @@ func (c *Container) checkpoint(ctx context.Context, options ContainerCheckpointO
 	if !options.KeepRunning && !options.PreCheckPoint {
 		c.state.State = define.ContainerStateStopped
 		c.state.Checkpointed = true
+		c.state.CheckpointedTime = time.Now()
+		c.state.Restored = false
+		c.state.RestoredTime = time.Time{}
 
 		// Cleanup Storage and Network
 		if err := c.cleanup(ctx); err != nil {
@@ -1216,6 +1223,8 @@ func (c *Container) checkpoint(ctx context.Context, options ContainerCheckpointO
 				logrus.Debugf("Unable to remove file %s", file)
 			}
 		}
+		// The file has been deleted. Do not mention it.
+		c.state.CheckpointLog = ""
 	}
 
 	c.state.FinishedTime = time.Now()
@@ -1293,6 +1302,10 @@ func (c *Container) restore(ctx context.Context, options ContainerCheckpointOpti
 		return nil, 0, err
 	}
 
+	// Setting RestoreLog early in case there is a failure.
+	c.state.RestoreLog = path.Join(c.bundlePath(), "restore.log")
+	c.state.CheckpointPath = c.CheckpointPath()
+
 	// Read network configuration from checkpoint
 	var netStatus map[string]types.StatusBlock
 	_, err := metadata.ReadJSONFile(&netStatus, c.bundlePath(), metadata.NetworkStatusFile)
@@ -1559,6 +1572,9 @@ func (c *Container) restore(ctx context.Context, options ContainerCheckpointOpti
 
 	c.state.State = define.ContainerStateRunning
 	c.state.Checkpointed = false
+	c.state.Restored = true
+	c.state.CheckpointedTime = time.Time{}
+	c.state.RestoredTime = time.Now()
 
 	if !options.Keep {
 		// Delete all checkpoint related files. At this point, in theory, all files
@@ -1569,6 +1585,7 @@ func (c *Container) restore(ctx context.Context, options ContainerCheckpointOpti
 		if err != nil {
 			logrus.Debugf("Non-fatal: removal of checkpoint directory (%s) failed: %v", c.CheckpointPath(), err)
 		}
+		c.state.CheckpointPath = ""
 		err = os.RemoveAll(c.PreCheckPointPath())
 		if err != nil {
 			logrus.Debugf("Non-fatal: removal of pre-checkpoint directory (%s) failed: %v", c.PreCheckPointPath(), err)
@@ -1589,6 +1606,8 @@ func (c *Container) restore(ctx context.Context, options ContainerCheckpointOpti
 				logrus.Debugf("Non-fatal: removal of checkpoint file (%s) failed: %v", file, err)
 			}
 		}
+		c.state.CheckpointLog = ""
+		c.state.RestoreLog = ""
 	}
 
 	return criuStatistics, runtimeRestoreDuration, c.save()
diff --git a/libpod/define/container_inspect.go b/libpod/define/container_inspect.go
index 677b39218..a4d9bcf4f 100644
--- a/libpod/define/container_inspect.go
+++ b/libpod/define/container_inspect.go
@@ -189,22 +189,28 @@ type InspectMount struct {
 // Docker, but here we see more fields that are unused (nonsensical in the
 // context of Libpod).
 type InspectContainerState struct {
-	OciVersion   string             `json:"OciVersion"`
-	Status       string             `json:"Status"`
-	Running      bool               `json:"Running"`
-	Paused       bool               `json:"Paused"`
-	Restarting   bool               `json:"Restarting"` // TODO
-	OOMKilled    bool               `json:"OOMKilled"`
-	Dead         bool               `json:"Dead"`
-	Pid          int                `json:"Pid"`
-	ConmonPid    int                `json:"ConmonPid,omitempty"`
-	ExitCode     int32              `json:"ExitCode"`
-	Error        string             `json:"Error"` // TODO
-	StartedAt    time.Time          `json:"StartedAt"`
-	FinishedAt   time.Time          `json:"FinishedAt"`
-	Health       HealthCheckResults `json:"Health,omitempty"`
-	Checkpointed bool               `json:"Checkpointed,omitempty"`
-	CgroupPath   string             `json:"CgroupPath,omitempty"`
+	OciVersion     string             `json:"OciVersion"`
+	Status         string             `json:"Status"`
+	Running        bool               `json:"Running"`
+	Paused         bool               `json:"Paused"`
+	Restarting     bool               `json:"Restarting"` // TODO
+	OOMKilled      bool               `json:"OOMKilled"`
+	Dead           bool               `json:"Dead"`
+	Pid            int                `json:"Pid"`
+	ConmonPid      int                `json:"ConmonPid,omitempty"`
+	ExitCode       int32              `json:"ExitCode"`
+	Error          string             `json:"Error"` // TODO
+	StartedAt      time.Time          `json:"StartedAt"`
+	FinishedAt     time.Time          `json:"FinishedAt"`
+	Health         HealthCheckResults `json:"Health,omitempty"`
+	Checkpointed   bool               `json:"Checkpointed,omitempty"`
+	CgroupPath     string             `json:"CgroupPath,omitempty"`
+	CheckpointedAt time.Time          `json:"CheckpointedAt,omitempty"`
+	RestoredAt     time.Time          `json:"RestoredAt,omitempty"`
+	CheckpointLog  string             `json:"CheckpointLog,omitempty"`
+	CheckpointPath string             `json:"CheckpointPath,omitempty"`
+	RestoreLog     string             `json:"RestoreLog,omitempty"`
+	Restored       bool               `json:"Restored,omitempty"`
 }
 
 // Healthcheck returns the HealthCheckResults. This is used for old podman compat