From f0759a308438d4c02b8bcd456de7a11712c989d2 Mon Sep 17 00:00:00 2001
From: Guohan Lu <gulv@microsoft.com>
Date: Fri, 1 Dec 2017 07:04:01 +0000
Subject: [PATCH] [build]: start docker service if not already started

docker start fails when docker service is already started
---
 slave.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/slave.mk b/slave.mk
index 71cee41e3d0a..e3ffc7e91ce7 100644
--- a/slave.mk
+++ b/slave.mk
@@ -336,7 +336,7 @@ $(SONIC_INSTALL_WHEELS) : $(PYTHON_WHEELS_PATH)/%-install : .platform $$(addsuff
 
 # start docker daemon
 docker-start :
-	@sudo service docker start &> /dev/null && sleep 1
+	@sudo service docker status &> /dev/null || ( sudo service docker start &> /dev/null && sleep 1 )
 
 # targets for building simple docker images that do not depend on any debian packages
 $(addprefix $(TARGET_PATH)/, $(SONIC_SIMPLE_DOCKER_IMAGES)) : $(TARGET_PATH)/%.gz : .platform docker-start $$(addsuffix -load,$$(addprefix $(TARGET_PATH)/,$$($$*.gz_LOAD_DOCKERS)))