lnmp nginx mysql雙主+keepalived
三臺服務器
10.10.10.50 node1 nginx服務器
10.10.10.51 node2 mysql1
10.10.10.52 node3 mysql2php
10.10.10.5 keepalived vrrp iphtml
關閉selunxnode
[root@node2 ~]# vim /etc/selinux/config SELINUX=disabled [root@node3 ~]# vim /etc/selinux/config SELINUX=disabled
若是安裝mysql 出現 Can't create test file /data/node2.lower-test ，說明selinux 忘記關了mysql
關閉iptables
linux
service iptables stop chkconfig iptables off
一 安裝設置mysqlnginx
[root@node2 ~]# yum -y install mysql-server [root@node3 ~]# yum -y install mysql-server
在node2 mysql設置sql
手動指定mysql數據目錄數據庫
[root@node2 ~]# mkdir /data [root@node2 /]# /usr/bin/mysql_install_db --user=mysql --datadir=/data/ [root@node2 ~]# service mysqld start
設置mysql root密碼vim
[root@node2 ~]# mysql
mysql> use mysql
Database changed
mysql> update user set password=password('root') where user='root';
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3 Changed: 3 Warnings: 0
mysql> exit
[root@node2 ~]# service mysqld stop
若是直接myssqladmin 設置完密碼沒法進入mysql，以下操做centos
#mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
開啓另一個新的終端
mysql -u root mysql
update user set password=password('root') where user='root';
flush privileges;
配置mysql
[root@node2 ~]# mv /etc/my.cnf /etc/my.cnf.bak [root@node2 ~]# cp /usr/share/mysql/my-medium.cnf /etc/my.cnf [root@node2 ~]# vim /etc/my.cnf [mysqld] datadir = /data/ server-id = 51 #修改id兩個服務器必須不一樣，通常指定爲IP最後一段
重起一次mysql 設置mysqladmin密碼
[root@node2 ~]# service mysqld stop [root@node2 ~]# service mysqld start [root@node2 ~]# mysqladmin -u root password 'root'
測試輸入密碼鏈接
[root@node2 ~]# mysql -uroot -proot
在node3 mysql設置
手動指定mysql數據目錄
[root@node3 ~]# mkdir /data [root@node3 /]# /usr/bin/mysql_install_db --user=mysql --datadir=/data/ [root@node3 ~]# service mysqld start
設置mysql root密碼
[root@node3 ~]# mysql
mysql> use mysql
Database changed
mysql> update user set password=password('root') where user='root';
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3 Changed: 3 Warnings: 0
mysql> exit
[root@node3 ~]# service mysqld stop
配置mysql
[root@node3 ~]# mv /etc/my.cnf /etc/my.cnf.bak [root@node3 ~]# cp /usr/share/mysql/my-medium.cnf /etc/my.cnf [root@node3 ~]# vim /etc/my.cnf [mysqld] datadir = /data/ server-id = 52 #修改id兩個服務器必須不一樣，通常指定爲IP最後一段
重起一次mysql 設置mysqladmin密碼
[root@node3 ~]# service mysqld stop [root@node3 ~]# service mysqld start [root@node3 ~]# mysqladmin -u root password 'root'
測試輸入密碼鏈接
ot@node3 ~]# mysql -uroot -proot
配置mysql主主
建立同步帳號 格式以下
grant replication slave on *.* to '賬號' @ '從服務器IP' identified by '密碼';
在兩個mysql服務器建立同步帳號 rep 密碼 rep
# mysql -uroot -proot mysql> use mysql Database changed mysql>grant replication slave on *.* to 'rep'@'%' identified by 'rep'; mysql> select * from user where user = 'rep' \G;
在mysql2服務器執行同步
先查詢mysql1的 狀態
mysql> show master status;
File mysql-bin.000001
Position 391
填入對應的sql參數
mysql> change master to master_host='10.10.10.51',master_user='rep',master_password='rep',master_log_file='mysql-bin.000001',master_log_pos=391; Query OK, 0 rows affected (0.03 sec)
啓動同步
mysql> start slave; Query OK, 0 rows affected (0.00 sec)
查看同步狀態
mysql> show slave status \G
Slave_IO_Running: Yes
Slave_SQL_Running: Yes 同步成功
在mysql1服務器執行同步
先查詢mysql2的 狀態
mysql> show master status;
File mysql-bin.000001
Position 386
填入對應的sql參數
mysql> change master to master_host='10.10.10.52',master_user='rep',master_password='rep',master_log_file='mysql-bin.000001',master_log_pos=386; Query OK, 0 rows affected (0.03 sec)
啓動同步
mysql> start slave; Query OK, 0 rows affected (0.00 sec)
查看同步狀態
mysql> show slave status \G
驗證同步設置
在mysql1建立一個數據庫wordpress和一個表test 並插入一個字段
mysql> create database wordpress; Query OK, 1 row affected (0.00 sec) mysql> use wordpress Database changed mysql> create table test(id int(3)); Query OK, 0 rows affected (0.00 sec) mysql> insert into test values (1); Query OK, 1 row affected (0.00 sec) mysql> select * from test; +------+ | id | +------+ | 1 | +------+ 1 row in set (0.00 sec)
在mysql2查詢
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | test | | wordpress | +--------------------+ 4 rows in set (0.00 sec) mysql> use wordpress; Database changed mysql> select * from test; +------+ | id | +------+ | 1 | +------+ 1 row in set (0.00 sec)
在mysql2 插入wordpress test 一個值
mysql> insert into test values (2); Query OK, 1 row affected (0.00 sec) mysql> mysql> select * from test; +------+ | id | +------+ | 1 | | 2 | +------+ 2 rows in set (0.00 sec)
在mysql1查詢
mysql> select * from test; +------+ | id | +------+ | 1 | | 2 | +------+ 2 rows in set (0.00 sec)
同步成功
二 安裝keepalived
yum -y install keepalived
受權mysql容許使用三個ip 鏈接
mysql -uroot -proot mysql> grant all on *.* to root@'10.10.10.5' identified by 'root'; mysql>grant all on *.* to root@'10.10.10.51' identified by 'root'; mysql>grant all on *.* to root@'10.10.10.52' identified by 'root';
編緝keepalived 配置文件
[root@node2 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER #主服務器
interface eth0
virtual_router_id 51
priority 100 #優先級
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.10.10.5 #VRRP 虛擬IP VIP
}
}
virtual_server 10.10.10.5 3306 { #鏈接的端口
delay_loop 6
lb_algo rr
lb_kind NAT
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 10.10.10.51 3306 { #本機服務的IP端口
weight 1
notify_down /data/script/keepalived.sh #檢測失敗執行的腳本，中止keepalive
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_prot 3306
}
}
}
複製配置文件到另外一服務器
[root@node2 ~]# scp /etc/keepalived/keepalived.conf 10.10.10.52:/etc/keepalived/keepalived.conf
[root@node3 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP #修改成backup服務器
interface eth0
virtual_router_id 51
priority 90 #優先級改小
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.10.10.5
}
}
virtual_server 10.10.10.5 3306 {
delay_loop 6
lb_algo rr
lb_kind NAT
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 10.10.10.52 3306 { #本機服務的IP端口
weight 1
notify_down /data/script/keepalived.sh #檢測失敗執行的腳本，中止keepalive
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_prot 3306
}
}
}
/data/script/keepalived.sh 的內容 ，在兩個服務器執行
[root@node2 ~]# mkdir /data/script [root@node2 ~]# vim /data/script/keepalived.sh #!/bin/bash service keepalived stop [root@node2 ~]# chmod +x /data/script/keepalived.sh
完成後 在兩個服務器啓動mysqld 和 keepalived
service mysqld start service keepalived start
查看IP狀態 ，VIP 在node2
[root@node2 ~]# ip addr list 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:05:71:e9 brd ff:ff:ff:ff:ff:ff inet 10.10.10.51/24 brd 10.10.10.255 scope global eth0 inet 10.10.10.5/32 scope global eth0 inet6 fe80::20c:29ff:fe05:71e9/64 scope link valid_lft forever preferred_lft forever [root@node3 ~]# ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:80:b9:0a brd ff:ff:ff:ff:ff:ff inet 10.10.10.52/24 brd 10.10.10.255 scope global eth0 inet6 fe80::20c:29ff:fe80:b90a/64 scope link valid_lft forever preferred_lft forever
測試mysql 鏈接
mysql -h10.10.10.5 -uroot -proot mysql
中止mysql1
[root@node2 ~]# service mysqld stop
查看IP狀態 VIP 在node3
[root@node2 script]# ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:05:71:e9 brd ff:ff:ff:ff:ff:ff inet 10.10.10.51/24 brd 10.10.10.255 scope global eth0 inet6 fe80::20c:29ff:fe05:71e9/64 scope link valid_lft forever preferred_lft forever [root@node3 ~]# ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:80:b9:0a brd ff:ff:ff:ff:ff:ff inet 10.10.10.52/24 brd 10.10.10.255 scope global eth0 inet 10.10.10.5/32 scope global eth0 inet6 fe80::20c:29ff:fe80:b90a/64 scope link valid_lft forever preferred_lft forever
設置mysqld 和 keepalived 開機啓動
chkconfig mysqld on chkconfig keepalived on
三 安裝wordpress
yum -y install httpd php php-mysql service httpd start wget https://cn.wordpress.org/wordpress-4.3.1-zh_CN.zip unzip wordpress-4.3.1-zh_CN.zip cp -rf wordpress/ /var/www/html/
打開 http://10.10.10.51/wordpress/wp-admin/setup-config.php
設置數據庫鏈接後複製生產的wp-config.php粘貼
vim /var/www/html/wp-config.php
複製配置文件到第二臺服務器
scp /var/www/html/wp-config.php 10.10.10.52:/var/www/html/
打開第二臺服務器，能夠直接查看
http://10.10.10.52/wordpress
四 安裝nginx
wget http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm rpm -ivh nginx-release-centos-6-0.el6.ngx.noarch.rpm yum install nginx
配置nginx
vim /etc/nginx/conf.d/default.conf
upstream wordpress {
server 10.10.10.51:80;
server 10.10.10.52:80;
}
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://wordpress;
root /wordpress;
index index.html index.htm;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}
打開 http://10.10.10.50/wordpress/
關閉node2 的 mysql 自動切換到 node3
關閉node3的mysql , 鏈接數據庫出錯
mysql 在node2中止後 keepalived 在node2 執行腳本中止自已 ，服務自動切換到node3
node3 中止後 ，node2的 keepalived 和mysqld要手動啓動
沒有開啓vrrp搶佔 ，node2 的keepalived恢復後 ，VRRP不會自動切換到node2，數據庫鏈接依然在node3
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