blkiodev: limit blkio device's read/write Bps/IOps

fixes AliyunContainerService#2509

Signed-off-by: Leno Hou <lenohou@gmail.com>

cli/update.go

@@ -51,6 +51,10 @@ func (uc *UpdateCommand) addFlags() {
  flagSet.StringSliceVarP(&uc.labels, "label", "l", nil, "Set label for container")
  flagSet.StringVar(&uc.restartPolicy, "restart", "", "Restart policy to apply when container exits")
  flagSet.StringSliceVar(&uc.diskQuota, "disk-quota", nil, "Update disk quota for container(/=10g)")
+ flagSet.Var(&uc.blkioDeviceReadBps, "device-read-bps", "Limit read rate (bytes per second) from a device")
+ flagSet.Var(&uc.blkioDeviceWriteBps, "device-write-bps", "Limit write rate (bytes per second) from a device")
+ flagSet.Var(&uc.blkioDeviceReadIOps, "device-read-iops", "Limit read rate (bytes per second) from a device")
+ flagSet.Var(&uc.blkioDeviceWriteIOps, "device-write-iops", "Limit write rate (bytes per second) from a device")
 }
 
 // updateRun is the entry of update command.
@@ -83,6 +87,10 @@ func (uc *UpdateCommand) updateRun(args []string) error {
  Memory: memory,
  MemorySwap: memorySwap,
  BlkioWeight: uc.blkioWeight,
+ BlkioDeviceReadBps: uc.blkioDeviceReadBps.Value(),
+ BlkioDeviceWriteBps: uc.blkioDeviceWriteBps.Value(),
+ BlkioDeviceReadIOps: uc.blkioDeviceReadIOps.Value(),
+ BlkioDeviceWriteIOps: uc.blkioDeviceWriteIOps.Value(),
  }
 
  restartPolicy, err := opts.ParseRestartPolicy(uc.restartPolicy)