add install pg_auto_failover with psql 11 in ubuntu 18.04

content/post/pg_auto_failover_in_ubuntu_1804_psql_11.md

@@ -62,7 +62,7 @@ sudo apt install postgresql-11-auto-failover -y
 postgresql 的相關執行檔路徑，預設不會載入到PATH變數中，所以要自己手動增加
 
 直接加入 /etc/environment ，或者是去修改使用者的 .profile 載入正確的 $PATH 都可以
-````
+```
 #replace PATH variable in /etc/environment
 PATH="/usr/lib/postgresql/11/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
 
@@ -960,3 +960,25 @@ pgautofailover                   RUNNING   pid 2232, uptime 0:00:04
 ```
 
 搞定，收工！準備寫 ansible playbook！
+
+
+***
+UPDATE
+
+新增用logrotate 來管理 pgautofailover logfile
+
+```
+sudo vim /etc/logrotate.d/pgautofailover
+
+/var/log/supervisor/pgautofail*.log {
+    daily
+    rotate 7                                                         
+    copytruncate
+    delaycompress    # today and yesterday will not compress
+    compress
+    missingok
+    notifempty
+}    
+
+```
+