chore: verify whether docker is available by executing docker ps command

Signed-off-by: zll600 <[email protected]>

Author: zll600

hack/local-up-karmada.sh

@@ -75,8 +75,8 @@ fi
 util::cmd_must_exist "go"
 util::verify_go_version
 
-# Make sure docker exists
-util::cmd_must_exist "docker"
+# Make sure docker is available
+util::verify_docker
 
 # install kind and kubectl
 kind_version=v0.20.0

hack/util.sh

@@ -112,6 +112,13 @@ function util::cmd_must_exist {
     fi
 }
 
+function util::verify_docker {
+  if ! docker ps -q >/dev/null 2>&1; then
+      echo "Docker is not available, Please verify docker is installed and available"
+      exit 1
+  fi
+}
+
 function util::verify_go_version {
     local go_version
     IFS=" " read -ra go_version <<< "$(GOFLAGS='' go version)"