From edc0b0ed8db264c06148f05580d58a710fb16a0f Mon Sep 17 00:00:00 2001
From: Weibin Zeng <qiaozi.zwb@alibaba-inc.com>
Date: Mon, 21 Dec 2020 20:28:28 +0800
Subject: [PATCH] check docker is running or not in
 prepare_env.sh/prepare_env_wsl.sh (#17)

---
 scripts/prepare_env.sh     | 17 +++++++++++++++--
 scripts/prepare_env_wsl.sh | 17 +++++++++++++++--
 2 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/scripts/prepare_env.sh b/scripts/prepare_env.sh
index 446ff7070a50..847d12281afb 100755
--- a/scripts/prepare_env.sh
+++ b/scripts/prepare_env.sh
@@ -47,10 +47,23 @@ function install_dependencies() {
   chmod +x minikube && sudo mv minikube /usr/local/bin/ && sudo ln /usr/local/bin/minikube /usr/bin/minikube || true
 }
 
+if [ -f "${HOME}/.kube/config" ];
+then
+    echo "We found existing kubernetes config, seems that you already have a ready kubernetes cluster"
+    echo "WARNING: If you do want to reset the kubernetes environment, please delete the existing config by"
+    echo ""
+    echo "    rm -rf ${HOME}/.kube"
+    echo ""
+    echo "and retry this script again."
+    exit 0
+fi
+
 install_dependencies
 
-# start docker daemon
-sudo systemctl start docker
+# start docker daemon if docker not running.
+if ! sudo docker info >/dev/null 2>&1; then
+    sudo systemctl start docker
+fi
 
 
 # launch k8s cluster
diff --git a/scripts/prepare_env_wsl.sh b/scripts/prepare_env_wsl.sh
index 036b27a0b274..3802a0d0542e 100755
--- a/scripts/prepare_env_wsl.sh
+++ b/scripts/prepare_env_wsl.sh
@@ -40,10 +40,23 @@ function install_dependencies() {
   chmod +x kind && sudo mv kind /usr/local/bin/ && sudo ln /usr/local/bin/kind /usr/bin/kind || true
 }
 
+if [ -f "${HOME}/.kube/config" ];
+then
+    echo "We found existing kubernetes config, seems that you already have a ready kubernetes cluster"
+    echo "WARNING: If you do want to reset the kubernetes environment, please delete the existing config by"
+    echo ""
+    echo "    rm -rf ${HOME}/.kube"
+    echo ""
+    echo "and retry this script ."
+    exit 0
+fi
+
 install_dependencies
 
-# start docker daemon
-sudo dockerd > /dev/null& || true
+# start docker daemon if docker not running.
+if ! sudo docker info >/dev/null 2>&1; then
+    sudo dockerd > /dev/null& || true
+fi
 
 # launch k8s cluster
 echo "$(date '+%Y-%m-%d %H:%M:%S') launch k8s cluster"