将dns 服务器的配置更新到inventory文件中

 ---
-nameservers:
-   - 10.66.4.18
-   - 10.66.4.17
 
 dc: qcloud-az1

+# inventory file for az1
+
+[nameservers]
+10.66.4.18
+10.66.4.17
+
 [java-nginx]
 10.66.0.2
 10.66.0.3

 ---
-nameservers:
-   - 10.66.105.5
-   - 10.66.105.9
 
 dc: qcloud-az2
\ No newline at end of file

+# inventory file for az2
+
+[nameservers]
+10.66.105.5
+10.66.105.9
+
 [java-nginx]
 10.66.104.15
 10.66.104.13

 ---
-nameservers:
-   - 10.66.200.10
-   - 10.66.200.12
-   
 
 dc: qcloud-az3
\ No newline at end of file

+# inventory file for az2
+
+[nameservers]
+10.66.200.10
+10.66.200.12
+
 [java-nginx]
 10.66.202.5
 10.66.202.12

 ---
-nameservers: ''
 nameserver_timeout: 1
\ No newline at end of file

 ---
 # Configure resolv.conf
+
+
+#  make sure group exists
+- name: make sure nameserver groups exist in inventory file
+  fail:
+    msg: "group {{ item }} not exist!"
+  when: item not in groups
+  with_items:
+    - nameservers
+
+
 - name: Configure resolv.conf
   template:
     src: resolv.conf.j2

 # {{ ansible_managed }}
 
 
-{% for i in nameservers %}
+{% for i in groups['nameservers'] %}
 nameserver {{ i }}
 {% endfor %}
 

+# inventory file for az1
+
+[nameservers]
+10.66.4.18
+10.66.4.17
+
 [java-nginx]
 10.66.0.2
 10.66.0.3

+# inventory file for az2
+
+[nameservers]
+10.66.105.5
+10.66.105.9
+
 [java-nginx]
 10.66.104.15
 10.66.104.13

+# inventory file for az2
+
+[nameservers]
+10.66.200.10
+10.66.200.12
+
 [java-nginx]
 10.66.202.5
 10.66.202.12