centos 6.9 /7 升級Percona-Server57 以安裝rocksdb engine

Percona 5.7.11 裝不了rocksdb Engine，故升級mysql版本到5.7到最高版本 27

我要裝的mysql是從庫

所以，設置主庫nginx代理 到從庫服務器相同端口，進行切換  此步可忽略

 卸載並安裝高版本 Percona-mysql-server 步驟如下：

1、查看yum 安裝列表

yum list installed  | grep Percona

2、停止mysql服務

需要先停掉 slave 同步

service mysql stop

3、刪除 模塊

yum remove Percona-Server-devel-57

yum remove Percona-Server-client-57

yum remove Percona-Server-shared-57

yum list installed  | grep Percona

4、重新安裝

yum install Percona-Server-devel-57.x86_64

yum install Percona-Server-client-57.x86_64

yum install Percona-Server-server-57.x86_64

注意：（centos7）這裏遇到問題 centos 6.9 測試不會有問題：

The GPG keys listed for the "CentOS 7 - Percona" repository are already installed but they are not correct for this package

解決方案(據官網說是個bug)：

yum install percona-release-0.1-7 && yum install percona-release

wget https://repo.percona.com/yum/PERCONA-PACKAGING-KEY &&  rpm --import PERCONA-PACKAGING-KEY

yum install https://repo.percona.com/yum/percona-release-latest.noarch.rpm

yum list installed  | grep Percona

5、安裝 rocksdb engine

yum install Percona-Server-rocksdb-57.x86_64

yum list installed  | grep Percona

6、啓動mysql

service mysql start

啓動 rocksdb

7、ps-admin --enable-rocksdb -u root -p

結束！