Revert "citadel knows nothing about core error"

This reverts commit 40c708a.

Author: timfeirg

cluster/calcium/create_container.go

@@ -30,35 +30,16 @@ func (c *calcium) CreateContainer(specs types.Specs, opts *types.DeployOptions)
 	}
 }
 
-// when shits go wrong before doCreateContainerWithCPUPeriod, don't just return
-// the channel and return an error, because citadel don't know what's going on
-func (c *calcium) createErrorMessage(err error) *types.CreateContainerMessage {
-	log.Errorf("Got error %s", err.Error())
-	m := &types.CreateContainerMessage{
-		Podname:       "",
-		Nodename:      "",
-		ContainerID:   "",
-		ContainerName: "",
-		Error:         err.Error(),
-		Success:       false,
-		CPU:           nil,
-		Memory:        0,
-	}
-	return m
-}
-
 func (c *calcium) createContainerWithCPUPeriod(specs types.Specs, opts *types.DeployOptions) (chan *types.CreateContainerMessage, error) {
 	ch := make(chan *types.CreateContainerMessage)
 
 	if opts.Memory < 4194304 { // 4194304 Byte = 4 MB, docker 创建容器的内存最低标准
-		err := fmt.Errorf("Minimum memory limit allowed is 4MB")
-		ch <- c.createErrorMessage(err)
-		return ch, err
+		return ch, fmt.Errorf("Minimum memory limit allowed is 4MB")
 	}
 
 	cpuandmem, _, err := c.getCPUAndMem(opts.Podname, opts.Nodename, 1.0)
 	if err != nil {
-		ch <- c.createErrorMessage(err)
+		log.Errorf("Got error %v after getCPUAndMem", err)
 		return ch, err
 	}
 	nodesInfo := utils.GetNodesInfo(cpuandmem)