Add hostConfig check for MemorySwappiness

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>

daemon/daemon_unix.go

@@ -157,6 +157,14 @@ func (daemon *Daemon) verifyContainerSettings(hostConfig *runconfig.HostConfig,
 	if hostConfig.Memory == 0 && hostConfig.MemorySwap > 0 {
 		return warnings, fmt.Errorf("You should always set the Memory limit when using Memoryswap limit, see usage.")
 	}
+	if hostConfig.MemorySwappiness != -1 && !daemon.SystemConfig().MemorySwappiness {
+		warnings = append(warnings, "Your kernel does not support memory swappiness capabilities, memory swappiness discarded.")
+		logrus.Warnf("Your kernel does not support memory swappiness capabilities, memory swappiness discarded.")
+		hostConfig.MemorySwappiness = -1
+	}
+	if hostConfig.MemorySwappiness != -1 && (hostConfig.MemorySwappiness < 0 || hostConfig.MemorySwappiness > 100) {
+		return warnings, fmt.Errorf("Invalid value: %d, valid memory swappiness range is 0-100.", hostConfig.MemorySwappiness)
+	}
 	if hostConfig.CpuPeriod > 0 && !daemon.SystemConfig().CpuCfsPeriod {
 		warnings = append(warnings, "Your kernel does not support CPU cfs period. Period discarded.")
 		logrus.Warnf("Your kernel does not support CPU cfs period. Period discarded.")