Remove stats from cache when container is destroyed

cache/cache.go

@@ -17,8 +17,12 @@ package cache
 import info "github.com/google/cadvisor/info/v1"
 
 type Cache interface {
+	// Add a ContainerStats for the specified container.
 	AddStats(ref info.ContainerReference, stats *info.ContainerStats) error
 
+	// Remove all cached information for the specified container.
+	RemoveContainer(containerName string) error
+
 	// Read most recent stats. numStats indicates max number of stats
 	// returned. The returned stats must be consecutive observed stats. If
 	// numStats < 0, then return all stats stored in the storage. The

cache/memory/memory.go

@@ -118,6 +118,13 @@ func (self *InMemoryCache) Close() error {
 	return nil
 }
 
+func (self *InMemoryCache) RemoveContainer(containerName string) error {
+	self.lock.Lock()
+	delete(self.containerCacheMap, containerName)
+	self.lock.Unlock()
+	return nil
+}
+
 func New(
 	maxAge time.Duration,
 	backend storage.StorageDriver,

manager/container.go

@@ -81,6 +81,10 @@ func (c *containerData) Start() error {
 }
 
 func (c *containerData) Stop() error {
+	err := c.memoryCache.RemoveContainer(c.info.Name)
+	if err != nil {
+		return err
+	}
 	c.stop <- true
 	return nil
 }