use block for hosts

defaults/main.yml

@@ -24,3 +24,6 @@ vm_agents_status: present
 customization: true
 nvidia_driver_version: null
 cloud_kernel: auto # or enabled / disabled
+railgun:
+  destination: chnroute
+  remoteGatewayId: 31

tasks/utility.yml

@@ -19,10 +19,10 @@
   when: inventory_hostname_short != '10' and inventory_hostname_short != '172' and inventory_hostname_short != '192'
 - name: hostname hosts
   become: true
-  lineinfile:
-    dest: /etc/hosts
-    regexp: "^{{ ansible_default_ipv4.address }}"
-    line: "{{ ansible_default_ipv4.address }} {{ inventory_hostname }} {{ inventory_hostname_short }}"
+  blockinfile:
+    path: /etc/hosts
+    marker: '# Generated by MyCard Init'
+    block: "{{ ansible_default_ipv4.address }} {{ inventory_hostname }} {{ inventory_hostname_short }}"
   when: inventory_hostname_short != '10' and inventory_hostname_short != '172' and inventory_hostname_short != '192'
 - name: clean aliyun
   become: true