Improve ps handling of container start/stop time

Previously all calculations were done based off the container's
start time. Retrieve end time and use it to calculate time
stopped for containers.

Also, convert ps JSON output to report timestamps for create,
start, and stop times.

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

Closes: #1228
Approved by: rhatdan

.gitignore

@@ -15,4 +15,5 @@
 .ropeproject
 __pycache__
 /cmd/podman/varlink/ioprojectatomicpodman.go
+/cmd/podman/varlink/iopodman.go
 .gopathok

cmd/podman/batchcontainer/container.go

@@ -42,6 +42,7 @@ type BatchContainerStruct struct {
 	Exited      bool
 	Pid         int
 	StartedTime time.Time
+	ExitedTime  time.Time
 	Size        *ContainerSize
 }
 
@@ -76,6 +77,7 @@ func BatchContainerOp(ctr *libpod.Container, opts PsOptions) (BatchContainerStru
 		pid         int
 		size        *ContainerSize
 		startedTime time.Time
+		exitedTime  time.Time
 	)
 
 	batchErr := ctr.Batch(func(c *libpod.Container) error {
@@ -93,6 +95,10 @@ func BatchContainerOp(ctr *libpod.Container, opts PsOptions) (BatchContainerStru
 		if err != nil {
 			logrus.Errorf("error getting started time for %q: %v", c.ID(), err)
 		}
+		exitedTime, err = c.FinishedTime()
+		if err != nil {
+			logrus.Errorf("error getting exited time for %q: %v", c.ID(), err)
+		}
 
 		if !opts.Size && !opts.Namespace {
 			return nil
@@ -132,6 +138,7 @@ func BatchContainerOp(ctr *libpod.Container, opts PsOptions) (BatchContainerStru
 		Exited:      exited,
 		Pid:         pid,
 		StartedTime: startedTime,
+		ExitedTime:  exitedTime,
 		Size:        size,
 	}, nil
 }

cmd/podman/ps.go

@@ -29,7 +29,6 @@ type psTemplateParams struct {
 	Command       string
 	CreatedAtTime time.Time
 	Created       string
-	RunningFor    string
 	Status        string
 	Ports         string
 	Size          string
@@ -57,10 +56,11 @@ type psJSONParams struct {
 	Image            string                        `json:"image"`
 	ImageID          string                        `json:"image_id"`
 	Command          []string                      `json:"command"`
-	CreatedAt        time.Time                     `json:"createdAt"`
 	ExitCode         int32                         `json:"exitCode"`
 	Exited           bool                          `json:"exited"`
-	RunningFor       time.Duration                 `json:"runningFor"`
+	CreatedAt        time.Time                     `json:"createdAt"`
+	StartedAt        time.Time                     `json:"startedAt"`
+	ExitedAt         time.Time                     `json:"exitedAt"`
 	Status           string                        `json:"status"`
 	PID              int                           `json:"PID"`
 	Ports            []ocicni.PortMapping          `json:"ports"`
@@ -110,7 +110,7 @@ func (a psSortedPod) Less(i, j int) bool { return a.psSorted[i].Pod < a.psSorted
 type psSortedRunningFor struct{ psSorted }
 
 func (a psSortedRunningFor) Less(i, j int) bool {
-	return a.psSorted[i].RunningFor < a.psSorted[j].RunningFor
+	return a.psSorted[j].StartedAt.After(a.psSorted[i].StartedAt)
 }
 
 type psSortedStatus struct{ psSorted }
@@ -529,7 +529,6 @@ func getTemplateOutput(psParams []psJSONParams, opts batchcontainer.PsOptions) (
 		if opts.Pod {
 			pod = psParam.Pod
 		}
-		runningFor := units.HumanDuration(psParam.RunningFor)
 
 		command := strings.Join(psParam.Command, " ")
 		if !opts.NoTrunc {
@@ -542,9 +541,10 @@ func getTemplateOutput(psParams []psJSONParams, opts batchcontainer.PsOptions) (
 
 		switch psParam.Status {
 		case libpod.ContainerStateStopped.String():
-			status = fmt.Sprintf("Exited (%d) %s ago", psParam.ExitCode, runningFor)
+			exitedSince := units.HumanDuration(time.Since(psParam.ExitedAt))
+			status = fmt.Sprintf("Exited (%d) %s ago", psParam.ExitCode, exitedSince)
 		case libpod.ContainerStateRunning.String():
-			status = "Up " + runningFor + " ago"
+			status = "Up " + units.HumanDuration(time.Since(psParam.StartedAt)) + " ago"
 		case libpod.ContainerStatePaused.String():
 			status = "Paused"
 		case libpod.ContainerStateCreated.String(), libpod.ContainerStateConfigured.String():
@@ -563,7 +563,6 @@ func getTemplateOutput(psParams []psJSONParams, opts batchcontainer.PsOptions) (
 			Command:       command,
 			CreatedAtTime: psParam.CreatedAt,
 			Created:       units.HumanDuration(time.Since(psParam.CreatedAt)) + " ago",
-			RunningFor:    runningFor,
 			Status:        status,
 			Ports:         ports,
 			Size:          size,
@@ -613,9 +612,11 @@ func getAndSortJSONParams(containers []*libpod.Container, opts batchcontainer.Ps
 			Image:            batchInfo.ConConfig.RootfsImageName,
 			ImageID:          batchInfo.ConConfig.RootfsImageID,
 			Command:          batchInfo.ConConfig.Spec.Process.Args,
-			CreatedAt:        batchInfo.ConConfig.CreatedTime,
 			ExitCode:         batchInfo.ExitCode,
 			Exited:           batchInfo.Exited,
+			CreatedAt:        batchInfo.ConConfig.CreatedTime,
+			StartedAt:        batchInfo.StartedTime,
+			ExitedAt:         batchInfo.ExitedTime,
 			Status:           batchInfo.ConState.String(),
 			PID:              batchInfo.Pid,
 			Ports:            batchInfo.ConConfig.PortMappings,
@@ -628,10 +629,6 @@ func getAndSortJSONParams(containers []*libpod.Container, opts batchcontainer.Ps
 			Pod:              ctr.PodID(),
 		}
 
-		if !batchInfo.StartedTime.IsZero() && batchInfo.ConState == libpod.ContainerStateRunning {
-			params.RunningFor = time.Since(batchInfo.StartedTime)
-		}
-
 		psOutput = append(psOutput, params)
 	}
 	return sortPsOutput(opts.Sort, psOutput)