minor fix: add cmd alias

ezdown

@@ -436,6 +436,8 @@ function start_local_registry() {
 
 function start_kubeasz_docker() {
   [[ -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; }
 
   logger info "try to run kubeasz in a container"
   # get host's IP
@@ -465,6 +467,7 @@ function start_kubeasz_docker() {
       --restart always \
       --volume "$BASE":"$BASE" \
       --volume /root/.kube:/root/.kube \
+      --volume /root/.bashrc:/root/.bashrc \
       --volume /root/.ssh:/root/.ssh \
       --volume /etc/docker:/etc/docker \
       easzlab/kubeasz:${KUBEASZ_VER} sleep 36000

roles/deploy/tasks/main.yml

@@ -56,18 +56,20 @@
   file: src={{ base_dir }}/bin/kubectl dest=/usr/bin/kubectl state=link
   ignore_errors: true
 
-# 注册变量以判断是否容器化运行ansible控制端，如果容器化运行那么进程数小于50
-- name: 注册变量以判断是否容器化运行ansible控制端
-  shell: "ps aux|wc -l"
-  register: procs
-
 - name: ansible 控制端写入环境变量$PATH
   lineinfile:
     dest: ~/.bashrc
     state: present
-    regexp: 'kubeasz'
+    regexp: 'custom PATH'
-    line: 'export PATH={{ base_dir }}/bin/:$PATH # generated by kubeasz'
+    line: 'export PATH={{ base_dir }}/bin/:$PATH # custom PATH generated by kubeasz'
-  when: "procs.stdout|int > 50"
+  ignore_errors: true
+
+- name: ansible 控制端写入命令别名
+  lineinfile:
+    dest: ~/.bashrc
+    state: present
+    regexp: 'docker exec'
+    line: "alias dek='docker exec -it kubeasz' # custom PATH generated by kubeasz"
   ignore_errors: true
 
 - name: ansible 控制端添加 kubectl 自动补全
@@ -75,6 +77,5 @@
     dest: ~/.bashrc
     state: present
     regexp: 'kubectl completion'
-    line: 'source <(kubectl completion bash)'
+    line: 'source <(kubectl completion bash) # generated by kubeasz'
-  when: "procs.stdout|int > 50"
   ignore_errors: true