refactor: handle the error in advance to avoid useless requests

Signed-off-by: Starnop <[email protected]>

Author: starnop

cri/v1alpha1/cri_utils.go

@@ -891,9 +891,9 @@ func (c *CriManager) attachLog(logPath string, containerID string, openStdin boo
 func (c *CriManager) getContainerMetrics(ctx context.Context, meta *mgr.Container) (*runtime.ContainerStats, error) {
 	var usedBytes, inodesUsed uint64
 
-	stats, _, err := c.ContainerMgr.Stats(ctx, meta.ID)
+	metadata, err := parseContainerName(meta.Name)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get stats of container %q: %v", meta.ID, err)
+		return nil, fmt.Errorf("failed to get metadata of container %q: %v", meta.ID, err)
 	}
 
 	// snapshot key may not equals container ID later
@@ -913,11 +913,6 @@ func (c *CriManager) getContainerMetrics(ctx context.Context, meta *mgr.Containe
 		InodesUsed: &runtime.UInt64Value{inodesUsed},
 	}
 
-	metadata, err := parseContainerName(meta.Name)
-	if err != nil {
-		return nil, fmt.Errorf("failed to get metadata of container %q: %v", meta.ID, err)
-	}
-
 	labels, annotations := extractLabels(meta.Config.Labels)
 
 	cs.Attributes = &runtime.ContainerAttributes{
@@ -927,6 +922,11 @@ func (c *CriManager) getContainerMetrics(ctx context.Context, meta *mgr.Containe
 		Annotations: annotations,
 	}
 
+	stats, _, err := c.ContainerMgr.Stats(ctx, meta.ID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get stats of container %q: %v", meta.ID, err)
+	}
+
 	if stats != nil {
 		s, err := typeurl.UnmarshalAny(stats.Data)
 		if err != nil {

cri/v1alpha2/cri_utils.go

@@ -918,9 +918,9 @@ func (c *CriManager) attachLog(logPath string, containerID string, openStdin boo
 func (c *CriManager) getContainerMetrics(ctx context.Context, meta *mgr.Container) (*runtime.ContainerStats, error) {
 	var usedBytes, inodesUsed uint64
 
-	stats, _, err := c.ContainerMgr.Stats(ctx, meta.ID)
+	metadata, err := parseContainerName(meta.Name)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get stats of container %q: %v", meta.ID, err)
+		return nil, fmt.Errorf("failed to get metadata of container %q: %v", meta.ID, err)
 	}
 
 	sn, err := c.SnapshotStore.Get(meta.ID)
@@ -938,12 +938,6 @@ func (c *CriManager) getContainerMetrics(ctx context.Context, meta *mgr.Containe
 		UsedBytes:  &runtime.UInt64Value{usedBytes},
 		InodesUsed: &runtime.UInt64Value{inodesUsed},
 	}
-
-	metadata, err := parseContainerName(meta.Name)
-	if err != nil {
-		return nil, fmt.Errorf("failed to get metadata of container %q: %v", meta.ID, err)
-	}
-
 	labels, annotations := extractLabels(meta.Config.Labels)
 
 	cs.Attributes = &runtime.ContainerAttributes{
@@ -953,6 +947,11 @@ func (c *CriManager) getContainerMetrics(ctx context.Context, meta *mgr.Containe
 		Annotations: annotations,
 	}
 
+	stats, _, err := c.ContainerMgr.Stats(ctx, meta.ID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get stats of container %q: %v", meta.ID, err)
+	}
+
 	if stats != nil {
 		s, err := typeurl.UnmarshalAny(stats.Data)
 		if err != nil {