fix access denied for root when executing initsql.

charts/tidb-cluster/templates/scripts/_initialize_tidb_users.py.tpl

@@ -1,6 +1,6 @@
 import os, MySQLdb
 host = '{{ template "cluster.name" . }}-tidb'
-permit_host = {{ .Values.tidb.permitHost | default "%%" | quote }}
+permit_host = {{ .Values.tidb.permitHost | default "%" | quote }}
 port = 4000
 password_dir = '/etc/tidb/password'
 conn = MySQLdb.connect(host=host, port=port, user='root', connect_timeout=5)
@@ -10,19 +10,19 @@ for file in os.listdir(password_dir):
     user = file
     with open(os.path.join(password_dir, file), 'r') as f:
         password = f.read()
-    if permit_host != '%%':
-        conn.cursor().execute("update mysql.user set Host=%s where User='root';", (permit_host,))
-        conn.cursor().execute("flush privileges;")
-        conn.commit()
     if user == 'root':
-        conn.cursor().execute("set password for 'root'@%s = %s;", (permit_host, password,))
+        conn.cursor().execute("set password for 'root'@'%%' = %s;", (password,))
     else:
         conn.cursor().execute("create user %s@%s identified by %s;", (user, permit_host, password,))
-conn.cursor().execute("flush privileges;")
-conn.commit()
 {{- if .Values.tidb.initSql }}
 with open('/data/init.sql', 'r') as sql:
     for line in sql.readlines():
         conn.cursor().execute(line)
         conn.commit()
 {{- end }}
+if permit_host != '%%':
+    conn.cursor().execute("update mysql.user set Host=%s where User='root';", (permit_host,))
+    conn.cursor().execute("flush privileges;")
+    conn.commit()
+conn.cursor().execute("flush privileges;")
+conn.commit()