emit warning on no liveness probe defined for pods

pkg/cmd/cli/describe/projectstatus.go

@@ -376,6 +376,9 @@ func getMarkerScanners(logsCommandName, securityPolicyCommandFormat, setProbeCom
 		func(g osgraph.Graph, f osgraph.Namer) []osgraph.Marker {
 			return deployanalysis.FindDeploymentConfigReadinessWarnings(g, f, setProbeCommandName)
 		},
+		func(g osgraph.Graph, f osgraph.Namer) []osgraph.Marker {
+			return deployanalysis.FindDeploymentConfigLivenessWarnings(g, f, setProbeCommandName)
+		},
 		routeanalysis.FindPortMappingIssues,
 		routeanalysis.FindMissingTLSTerminationType,
 		routeanalysis.FindPathBasedPassthroughRoutes,

pkg/deploy/graph/analysis/dc.go

@@ -18,6 +18,7 @@ const (
 	MissingImageStreamErr        = "MissingImageStream"
 	MissingImageStreamTagWarning = "MissingImageStreamTag"
 	MissingReadinessProbeWarning = "MissingReadinessProbe"
+	MissingLivenessProbeWarning  = "MissingLivenessProbe"
 )
 
 // FindDeploymentConfigTriggerErrors checks for possible failures in deployment config
@@ -124,3 +125,33 @@ Node:
 
 	return markers
 }
+
+// FindDeploymentConfigLivenessWarnings inspects deploymentconfigs and reports those that
+// don't have liveness probes set up.
+func FindDeploymentConfigLivenessWarnings(g osgraph.Graph, f osgraph.Namer, setProbeCommand string) []osgraph.Marker {
+	markers := []osgraph.Marker{}
+
+Node:
+	for _, uncastDcNode := range g.NodesByKind(deploygraph.DeploymentConfigNodeKind) {
+		dcNode := uncastDcNode.(*deploygraph.DeploymentConfigNode)
+		if t := dcNode.DeploymentConfig.Spec.Template; t != nil && len(t.Spec.Containers) > 0 {
+			for _, container := range t.Spec.Containers {
+				if container.LivenessProbe != nil {
+					continue Node
+				}
+			}
+			// All of the containers in the deployment config lack a readiness probe
+			markers = append(markers, osgraph.Marker{
+				Node:     uncastDcNode,
+				Severity: osgraph.WarningSeverity,
+				Key:      MissingLivenessProbeWarning,
+				Message: fmt.Sprintf("%s has no liveness probe to verify pods are still running.",
+					f.ResourceName(dcNode)),
+				Suggestion: osgraph.Suggestion(fmt.Sprintf("%s %s --liveness ...", setProbeCommand, f.ResourceName(dcNode))),
+			})
+			continue Node
+		}
+	}
+
+	return markers
+}