mysql之yum安裝
==準備工作== 環境：# cat /etc/redhat-release CentOS Linux release 7.4.1708 (Core)
適當調整記憶體
關閉selinux
# sed -ri '/^SELINUX=/c\SELINUX=disabled' /etc/selinux/config（vim /etc/selinux/config更改也可） # setenforce 0
關閉防火牆
# systemctl stop firewalld && systemctl disable firewalld
1. 新增yum倉庫 # cd /etc//yum.repos.d/
# vim mysql.repo
# Enable to use MySQL 5.7 [mysql57-community] name=MySQL 5.7 Community Server baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/ #官方源地址 enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
此處需要有校驗檔案，否則安裝會報如下錯誤：
Downloading packages: 警告：/var/cache/yum/x86_64/7/mysql57-community/packages/mysql-community-server-5.7.23-1.el7.x86_64.rpm: 頭V3 DSA/SHA1 Signature, 金鑰 ID 5072e1f5: NOKEY 從 file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql 檢索金鑰
獲取 GPG 金鑰失敗：[Errno 14] curl#37 - "Couldn't open file /etc/pki/rpm-gpg/RPM-GPG-KEY-mysql"
解決辦法：
A. 到mysql官網下載校驗檔案
B. 跳過校驗，編輯檔案/etc/yum.repos.d/mysql.repo
修改gpgcheck=0
註釋或這刪除gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
2. 重新整理yum倉庫 # yum clean all # yum makecache
[[email protected]~]# yum repolist 已載入外掛：fastestmirror, langpacks Loading mirror speeds from cached hostfile 源標識 源名稱 狀態 base/7/x86_64 CentOS-7 - Base - 163.com 9,911 epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 12,685 extras/7/x86_64 CentOS-7 - Extras - 163.com 402 mysql57-community/x86_64 MySQL 5.7 Community Server 287 updates/7/x86_64 CentOS-7 - Updates - 163.com 1,336 repolist: 24,621
3. 安裝mysql-server 查詢安裝包： # yum list | grep mysql-community-server
mysql-community-server.x86_64 5.7.23-1.el7 mysql57-community
安裝mysql： # yum -y install mysql-community-server.x86_64
......
已安裝: mysql-community-libs.x86_64 0:5.7.23-1.el7 mysql-community-libs-compat.x86_64 0:5.7.23-1.el7 mysql-community-server.x86_64 0:5.7.23-1.el7
作為依賴被安裝: mysql-community-client.x86_64 0:5.7.23-1.el7 mysql-community-common.x86_64 0:5.7.23-1.el7 numactl-libs.x86_64 0:2.0.9-7.el7
替代: mariadb-libs.x86_64 1:5.5.56-2.el7
完畢！
4. 啟動資料庫，並設定開機自啟
[[email protected] ~]# systemctl enable mysqld && systemctl start mysqld
[[email protected] ~]# ls /var/lib/mysql auto.cnf ca.pem client-key.pem ibdata1 ib_logfile1 mysql mysql.sock.lock private_key.pem server-cert.pem sys ca-key.pem client-cert.pem ib_buffer_pool ib_logfile0 ibtmp1 mysql.sock performance_schema public_key.pem server-key.pem
[[email protected] ~]# systemctl status mysqld ● mysqld.service - MySQL Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled) Active: active (running) since.....
......
5. 登陸mysql
[[email protected] ~]# grep 'password' /var/log/mysqld.log #查詢登陸密碼，預設初始密碼（密碼需要自己查詢） 2018-09-15T07:30:15.267136Z 1 [Note] A temporary password is generated for [email protected]: weeh9=n8ts7K [[email protected] ~]# mysql -u root -p'weeh9=n8ts7K' mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.23
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
看見mysql>提示符，說明登陸成功。
修改root密碼：
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '[email protected]'; Query OK, 0 rows affected (0.00 sec)
實際生產中，需要新增對應的服務資料庫賬戶，並設定禁止登陸系統，以及授予所需許可權
重新整理許可權：
mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)
檢視資料庫：
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | sys | +--------------------+ 4 rows in set (0.00 sec)
退出資料庫：
mysql> exit; Bye
至此，yum安裝mysql5.7完成！
==錯誤提示== 1. 記憶體不足（>1G）：增加記憶體 2. 磁碟空間不足：新增磁碟 pvcreate vgextend vg /dev/... lvextend -L +5G xfs_growfs /dev/
後附部分官網提示圖
