####環境準備
安裝mysql(centos7 默認沒有mysql源)
yum clearup
yum update
yum install vim libaio net-tools
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
rpm -ivh mysql-community-release-el7-5.noarch.rpm
yum install mysql-server python-mysqldb(Python-mysqldb未安裝)python
啓動修改密碼
update user set password=password(‘123456‘) where user=‘root‘;mysql
###給slave賦權
grant replication slave on *.* to '用戶名'@'192.168.1.153' identified by '密碼';
###鎖表,找到master當前的binlog點以及position位置
flush tables with read lock;
show master status; ###記錄日誌制文件以及position點
unlock tables;nginx
###從庫上操做,先停掉salve服務,而後配置連上master的配置
stop slave
####利用剛在主庫上面建立的帳號密碼以及記錄的二進制日誌文件和position點,鏈接到主庫的同步位置
change master to master_host='192.168.178.2',master_user='xldroot',master_password='123123',master_log_file='mysql-bin.000003', master_log_pos=790;
start slave
show slave status\G
#######一下兩項爲yes即OK,也能夠本身去建立數據庫,看下是否有同步
Slave_IO_Running: Yes
Slave_SQL_Running: Yessql
###上面是單方向主從配置,主主的話反着來一次便可(以前的從上建立鏈接的帳號和密碼以及記錄節點位置,而後在以前的主鏈接到從),不過配置裏面仍是有區別
[client]
character-set-server = utf8 #####客戶端默認鏈接字集集,若編譯安裝時已指定則不用填寫數據庫
[mysqld]
datadir=/data/mysql/data
character-set-server = utf8
socket=/var/lib/mysql/mysql.sock
port = 3306
server_id = 1
log-bin= mysql-bin
binlog_format = mixed
bind = 0.0.0.0
read-only=0
#binlog-do-db=test
binlog-ignore-db=mysql
binlog-ignore-db=information_schema
binlog-ignore-db=performance_schema
auto-increment-offset=1
auto-increment-increment=2vim
#主從複製
##replicate-do-db=test ###開啓的話只同步這些庫
replicate-ignore-db=mysql ###忽略同步這些庫
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema
relay_log=mysql-relay-bin
log-slave-updates=oncentos
###binlog日誌
log_bin = /data/log/mysql/mysql-bin.log
relay_log = /data/log/mysql/mysql-relay-bin
log_slave_updates = 1
expire_logs_days = 7服務器
###慢查詢
slow_query_log = ON
slow_query_log_file = /data/log/mysql/mysql-slow.log
#log_slow_queries = /data/log/mysql/mysql-slow.log
long_query_time = 2socket
key_buffer = 16M
max_allowed_packet = 16M
thread_stack = 192K
thread_cache_size = 50ide
[mysqld_safe]
log-error=/data/log/mysql/mariadb.log
pid-file=/data/log/mysql/mariadb.pid
[client]
character-set-server = utf8 #####客戶端默認鏈接字集集,若編譯安裝時已指定則不用填寫
[mysqld]
socket=/var/lib/mysql/mysql.sock
character-set-server = utf8
datadir =/data/mysql/data
port = 3306
server_id = 2
log-bin= mysql-bin
binlog_format = mixed
read-only=0
#replicate-do-db=test
replicate-ignore-db=mysql
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema
relay_log=mysql-relay-bin
log-slave-updates=on
#
##
##binlog-do-db=test
binlog-ignore-db=mysql
binlog-ignore-db=information_schema
binlog-ignore-db=performance_schema
auto-increment-offset=2
auto-increment-increment=2
log_bin = /data/log/mysql/mysql-bin.log
relay_log = /data/log/mysql/mysql-relay-bin
log_slave_updates = 1
expire_logs_days = 7
slow_query_log = ON
slow_query_log_file = /data/log/mysql/mysql-slow.log
#log_slow_queries = /data/log/mysql/mysql-slow.log
long_query_time = 2
key_buffer = 16M
max_allowed_packet = 16M
thread_stack = 192K
thread_cache_size = 50
[mysqld_safe]
log-error=/data/log/mysql/mariadb.log
pid-file=/data/log/mysql/mariadb.pid
#####由於這個主從的跑配置沒有在my.cnf裏面,從新啓動會加載數據目錄下面的配置
/var/lib/mysql/master.info ###根據你本身的數據目錄而定,記錄了服務器地址,同步節點位置
####keepalived實現mysql主主自動切換
yum -y install keepalived
###加入開啓啓動
chkconfig keepalived on 2345
chkconfig mysqld on 2345
###查驗
centos7
systemctl list-unit-files |egrep 'mysql|keepalived'
####keepalived配置
global_defs {
notification_email {
#failover@firewall.loc
root@localhost ###告警通知,如今做用不大,通常均可以經過其餘監控軟件來作
}
notification_email_from root@localhost ###發件人
smtp_server localhost ###SMTP服務器
smtp_connect_timeout 30
router_id LVS_DEVEL ###可一致,也可不一致
}
vrrp_instance VI_1 { ###至關於Cisco的vrrp協議,虛擬一個組,若是有多個時,定義多個組便可
state MASTER ###目前的主,只是一種稱呼,實際由優先級決定,越高的是老大
interface ens4 ###綁定的接口
virtual_router_id 51 ###組id,必須一致,表示都加入同一個組
priority 100 ###優先級
advert_int 1 ###通告時間,也就是加入這個組的全部機器以前的通告
authentication { ###定義認證,內容必須一致
auth_type PASS
auth_pass baowang
}
virtual_ipaddress { ###這就是虛擬出來對外訪問的地址
10.68.3.160
#192.168.200.17
}
}
virtual_server 10.68.3.160 3306 { ###細化,虛擬到哪些端口
delay_loop 6
lb_algo wrr ###帶有權重的輪詢
lb_kind NAT
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 10.68.3.145 3306 { ###綁定到的真實地址和端口
weight 5 ###權重降低值
notify_up /etc/keepalived/keepalived_start.sh ###檢測總體服務器環境正常以後的操做
notify_down /etc/keepalived/keepalived_shutdown.sh ###定義腳本檢測,down以後的操做
TCP_CHECK { ###定義一些基本的校驗項
connect_timeout 10 ###超時時間
nb_get_retry 5 ###重連次數
delay_before_retry 3 ###重連間隔
connect_port 3306
}
}
}
}
###額外的,能夠定義全腳本
vrrp_script chk_nginx {
script "/home/check_nginx.sh"
interval 2
weight 2
}
###局部模塊,位置虛擬組vrrp_instance VI_1裏面,用於調用全局的腳本
track_script {
chk_nginx #檢測腳本
}
####定義日誌輸出:默認是在/var/log/message,這個日誌裏面混合太多,查看不太方便
1.修改etc/sysconfig/keepalived文件
把KEEPALIVED_OPTIONS="-D"
修改成KEEPALIVED_OPTIONS="-D -d -S 0"
2.設置syslog,修改/etc/syslog.conf,添加內容以下(centos7是/etc/rsyslog.conf)
# keepalived -S 0
local0.* /data/log/keepalive/keepalived.log
3.###重啓日誌服務和keepalive服務,在定義的路徑下就能夠看到須要的日誌
systemctl restart rsyslog or systemctl restart syslog
service keepalived restart
4.####mysql得建立容許keepalive虛擬IP鏈接的帳號