TiDB ip改域名

声明：此方法不太常规，在生产环境操作前一定要充分验证

1. stop TiDB
   ansible-playbook stop.yml

2. 配置hosts文件
   在TiDB集群的所有节点修改/etc/hosts,添加预定义的hostname映射关系

   $ more /etc/hosts
   127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
   ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
   192.168.0.101 server.tidb.com
   192.168.0.102 kv1.tidb.com
   192.168.0.103 kv2.tidb.com
   192.168.0.104 kv3.tidb.com
   

3. 修改inventory.ini
   将inventory.ini配置文件中的ip都换成对应的hostname

   
   # TiDB Cluster Part
   
   [tidb_servers]
   
   #192.168.0.101
   
   server.tidb.com
   
   [tikv_servers]
   
   #TiKV1-1 ansible_host=192.168.0.102 deploy_dir=/data1/deploy tikv_port=20171 labels="host=tikv_1"
   
   #TiKV2-1 ansible_host=192.168.0.103 deploy_dir=/data1/deploy tikv_port=20171 labels="host=tikv_2"
   
   #TiKV3-1 ansible_host=192.168.0.104 deploy_dir=/data1/deploy tikv_port=20171 labels="host=tikv_3"
   
   TiKV1-1 ansible_host=kv1.tidb.com deploy_dir=``/data1/deploy` `tikv_port=20171 labels=``"host=tikv_1"
   
   TiKV2-1 ansible_host=kv1.tidb.com deploy_dir=``/data1/deploy` `tikv_port=20171 labels=``"host=tikv_2"
   
   TiKV3-1 ansible_host=kv1.tidb.com deploy_dir=``/data1/deploy` `tikv_port=20171 labels=``"host=tikv_3"
   
   [pd_servers]
   
   #192.168.0.101
   
   server.tidb.com
   
   # Monitoring Part
   
   [monitoring_servers]
   
   #192.168.0.101
   
   server.tidb.com
   
   [grafana_servers]
   
   #192.168.0.101
   
   server.tidb.com
   
   

4. 清空prometheus-XXX.data.metrics

mv prometheus2.0.0.data.metrics prometheus2.0.0.data.metrics.bak

5. 重新部署

$ ansible-playbook deploy.yml

6. 修改PD启动脚本
   PD的启动脚本中，client-urls和peer-urls不能使用域名，都修改成0.0.0.0

    exec bin/pd-server \
    --name="pd1" \
    --client-urls="[http://0.0.0.0:2379](http://0.0.0.0:2379/)" \
    --advertise-client-urls="[http://server.tidb.com:2379](http://server.tidb.com:2379/)" \
    --peer-urls="[http://0.0.0.0:2380](http://0.0.0.0:2380/)" \
    --advertise-peer-urls="[http://server.tidb.com:2380](http://server.tidb.com:2380/)" \
    --data-dir="/home/tidb/deploy/data.pd" \
    --initial-cluster="pd1=[http://server.tidb.com:2380](http://server.tidb.com:2380/)" \
    --config=conf/pd.toml \
    --log-file="/home/tidb/deploy/log/pd.log" 2>> "/home/tidb/deploy/log/pd_stderr.log"

7. 重新启动数据库，验证

ansible-playbook stop.yml