Merge pull request #17890 from Luap99/stats-compat

stats compat API: return "id" lowercase

pkg/api/handlers/compat/containers_stats.go

@@ -202,7 +202,14 @@ streamLabel: // A label to flatten the scope
 			Networks: net,
 		}
 
-		if err := coder.Encode(s); err != nil {
+		var jsonOut interface{}
+		if utils.IsLibpodRequest(r) {
+			jsonOut = s
+		} else {
+			jsonOut = DockerStatsJSON(s)
+		}
+
+		if err := coder.Encode(jsonOut); err != nil {
 			logrus.Errorf("Unable to encode stats: %v", err)
 			return
 		}

pkg/api/handlers/compat/types.go

@@ -53,3 +53,16 @@ type StatsJSON struct {
 	// Networks request version >=1.21
 	Networks map[string]docker.NetworkStats `json:"networks,omitempty"`
 }
+
+// DockerStatsJSON is the same as StatsJSON except for the lowercase
+// "id" in the JSON tag. This is needed for docker compat but we should
+// not change the libpod API output for backwards compat reasons.
+type DockerStatsJSON struct {
+	Stats
+
+	Name string `json:"name,omitempty"`
+	ID   string `json:"id,omitempty"`
+
+	// Networks request version >=1.21
+	Networks map[string]docker.NetworkStats `json:"networks,omitempty"`
+}

test/apiv2/20-containers.at

@@ -113,7 +113,13 @@ if root; then
     podman run --name $CTRNAME -d -m 512m -v /tmp:/tmp $IMAGE top
 
     t GET libpod/containers/$CTRNAME/stats?stream=false 200 \
-    .memory_stats.limit=536870912
+    .memory_stats.limit=536870912 \
+    .Id~[0-9a-f]\\{64\\}
+
+    # Make sure docker compat endpoint shows "id" lowercase
+    t GET containers/$CTRNAME/stats?stream=false 200 \
+    .memory_stats.limit=536870912 \
+    .id~[0-9a-f]\\{64\\}
 
     podman rm -f $CTRNAME
 fi