update docker 20.10.22

ezdown

@@ -13,7 +13,7 @@ set -o pipefail
 #set -o xtrace
 
 # default settings, can be overridden by cmd line options, see usage
-DOCKER_VER=20.10.18
+DOCKER_VER=20.10.22
 KUBEASZ_VER=3.5.0
 K8S_BIN_VER=v1.26.0
 EXT_BIN_VER=1.6.4
@@ -525,6 +525,10 @@ function start_local_registry() {
 
 
 function start_kubeasz_docker() {
+  # create cmd alias in /root/.bashrc
+  sed -i '/docker exec/d' /root/.bashrc
+  echo "alias dk='docker exec -it kubeasz'  # generated by kubeasz" >> /root/.bashrc
+
   [[ -d "$BASE/roles/kube-node" ]] || { logger error "not initialized. try 'ezdown -D' first."; exit 1; }
   docker ps -a --format="{{ .Names }}"|grep kubeasz > /dev/null 2>&1 && \
   { logger warn "kubeasz container is already existed"; return 0; }
@@ -549,10 +553,6 @@ function start_kubeasz_docker() {
     ln -s /usr/bin/python3 /usr/bin/python
   fi
 
-  # create cmd alias in /root/.bashrc
-  sed -i '/docker exec/d' /root/.bashrc
-  echo "alias dk='docker exec -it kubeasz'  # generated by kubeasz" >> /root/.bashrc
-
   # run kubeasz docker container
   docker run --detach \
       --env HOST_IP="$host_ip" \