From a155350a07379b9795cb06889f70f6b6f18a66b9 Mon Sep 17 00:00:00 2001
From: lcp0578 <lcp0578@gmail.com>
Date: Sat, 8 Sep 2018 16:42:57 +0800
Subject: [PATCH] update mysql8 authentication

---
 README.md                                 |  1 +
 src/MySQL/README.md                       |  3 ++-
 src/MySQL/mysql8_authentication_plugin.md | 17 +++++++++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 src/MySQL/mysql8_authentication_plugin.md

diff --git a/README.md b/README.md
index 8f81abb7..2d467a1f 100644
--- a/README.md
+++ b/README.md
@@ -138,6 +138,7 @@
 	- [DROP INDEX](src/MySQL/DROP_INDEX.md)
 	- [Atlas](src/MySQL/Atlas.md) Atlas (MySQL proxy) 使用
 	- [MySQL 8 windows install](src/MySQL/mysql8_windows_install.md) MySQL8在windows下的安装
+	- [MySQL8 authentication plugin](src/MySQL/mysql8_authentication_plugin.md)MySQL8密码验证插件更换后，问题解决办法
 4.  [composer](src/composer/README.md "composer")
 	- [composer basic](src/composer/basic.md) composer基础使用
     - [composer config](src/composer/config.md) composer配置相关
diff --git a/src/MySQL/README.md b/src/MySQL/README.md
index 8b8d26fe..b23e189d 100644
--- a/src/MySQL/README.md
+++ b/src/MySQL/README.md
@@ -16,4 +16,5 @@
 - [windows mysql](windows_mysql.md) windows下安装mysql
 - [DROP INDEX](DROP_INDEX.md)
 - [Atlas](Atlas.md) Atlas (MySQL proxy) 使用
-- [MySQL 8 windows install](mysql8_windows_install.md) MySQL8在windows下的安装
\ No newline at end of file
+- [MySQL 8 windows install](mysql8_windows_install.md) MySQL8在windows下的安装
+- [MySQL8 authentication plugin](mysql8_authentication_plugin.md)MySQL8密码验证插件更换后，问题解决办法
\ No newline at end of file
diff --git a/src/MySQL/mysql8_authentication_plugin.md b/src/MySQL/mysql8_authentication_plugin.md
new file mode 100644
index 00000000..103d3a6f
--- /dev/null
+++ b/src/MySQL/mysql8_authentication_plugin.md
@@ -0,0 +1,17 @@
+## MySQL8 authentication plugin
+- MySQL default authentication-plugin
+	- MySQL8之前版本，采用：mysql_native_password
+	- MySQL8 采用：caching_sha2_password
+- MySQL客户端提示连接失败解决办法
+	- 修改默认配置
+	
+    		default-authentication-plugin=mysql_native_password
+    - 重新设置root密码
+    
+    		use mysql;
+            ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'new password';
+            FLUSH PRIVILEGES;
+- PHP报错：SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client
+	- 错误原因：由于MySQL 8默认使用了新的密码验证插件：caching_sha2_password，而之前的PHP版本中所带的mysqlnd无法支持这种验证。
+	- 升级PHP，查看phpinfo的mysqlnd的Loaded plugins部分，是否包含caching_sha2_password
+	- 目前开始支持的版本：PHP 7.1.20以上版本和PHP 7.2.8以上版本。
\ No newline at end of file