一、主从复制部署（数据库已经安装好）

主从复制

#主从服务器配置
yum install ntp -y
vim /etc/ntp.conf
yum -y install ntpdate ntp    #安装ntp软件
ntpdate ntp.aliyun.com        #时间同步
systemctl start ntpd
systemctl stop firewalld.service 
setenforce 0

#主服务器
vim /etc/my.cnf
#开启二进制日志文件（之后生成的日志名为master-bin）
log_bin=master-bin
#开启从服务器日志同步
log_slave=updates=true
#主服务器id为1（不可重复）
server_id = 1


[root@master ~]# mysql -uroot -p123456

mysql> GRANT REPLICATION SLAVE ON *.* TO 'myslave'@'192.168.255.%' IDENTIFIED BY '123456';
mysql> flush privileges;

mysql> show master status;



#从服务器
vi /etc/my.cnfvi /etc/my.cnf
#开启二进制日志文件
log-bin=master-bin
#设置server id为2，slave2 为3
server_id = 2
#从主服务器上同步日志文件记录到本地
relay-log=relay-log-bin
#定义relay-log的位置和名称（index索引） 
relay-log-index=slave-relay-bin.index

mysql -uroot -p123456

mysql> change master to 
mysql> 
master_host='192.168.255.180',master_user='myslave',master_password='123456',master_log_file='master-bin.000002',master_log_pos=604;

mysql> start slave;

mysql> show slave status\G;
            Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

主服务器授权

数据库授权，（master 节点执行）
create user 'exporter'@'%' identified by '123456';
create user 'exporter'@'127.0.0.1' identified by '123456';
create user 'exporter'@'localhost' identified by '123456';

grant process,replication client,select on *.* to 'exporter'@'%' identified by 'admin123';
grant process,replication client,select on *.* to 'exporter'@'127.0.0.1' identified by 'admin123';
grant process,replication client,select on *.* to 'exporter'@'localhost' identified by 'admin123';

上传mysqld_exporter,配置mysqld 主从复制的指标暴露器

wget http://101.34.22.188/mysql_exporter/mysqld_exporter-0.12.1.linux-amd64.tar.gz
tar -zxvf mysqld_exporter-0.12.1.linux-amd64.tar.gz -C /usr/local

进入目录，创建配置文件（主从）

cd /usr/local/mysqld_exporter-0.12.1.linux-amd64/

cat > /usr/local/mysqld_exporter-0.12.1.linux-amd64/my.cnf << EOF
[client]
user=exporter
password=admin123
EOF

cat > /usr/lib/systemd/system/mysqld_exporter.service << EOF
[Unit]
Description=mysqld_exporter
After=network.target

[Service]
User=root
Type=simple
ExecStart=/usr/local/mysqld_exporter-0.12.1.linux-amd64/mysqld_exporter \
--config.my-cnf /usr/local/mysqld_exporter-0.12.1.linux-amd64/my.cnf \
--collect.info_schema.processlist

Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl start mysqld_exporter.service 
netstat -natp | grep 9104

配置 mysql 服务器指标暴露器（主从）

wget http://101.34.22.188/mysql_exporter/node_exporter-1.1.2.linux-amd64.tar.gz
tar zxvf node_exporter-1.1.2.linux-amd64.tar.gz -C /opt
cd /opt
mv node_exporter-1.1.2.linux-amd64 node_exporter

cat > /usr/lib/systemd/system/node_exporter.service << EOF
[Unit]
Description=node_exporter
Documentation=https://prometheus.io/
After=network.target

[Service]
Type=simple
User=root
ExecStart=/opt/node_exporter/node_exporter
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl start node_exporter && systemctl enable node_exporter
netstat -natp | grep 9100

二、Prometheus + Grafana 部署

部署 prometheus

wget http://101.34.22.188/prometheus/prometheus-2.27.1.linux-amd64.tar.gz
tar zxvf prometheus-2.27.1.linux-amd64.tar.gz -C /usr/local

修改配置文件

cd /usr/local/prometheus-2.27.1.linux-amd64

vim prometheus.yml
##最后插入：
  - job_name: 'mysql-master-slave'			#定义主从复制的job
    scrape_interval: 5s						#指标数据采集周期
    static_configs:							#静态采集方式
    - targets: ['192.168.10.60:9104','192.168.10.70:9104']		#定义targets
  - job_name: 'nodes'						#定义nodes主机信息job
    scrape_interval: 5s
    static_configs:
    - targets: ['192.168.10.60:9100','192.168.10.70:9100']

#无注释复制
  - job_name: 'mysql-master-slave'
    scrape_interval: 5s
    static_configs:
    - targets: ['192.168.10.60:9104','192.168.10.70:9104']
  - job_name: 'nodes'
    scrape_interval: 5s
    static_configs:
    - targets: ['192.168.10.60:9100','192.168.10.70:9100']

启动 prometheus

[root@prometheus /usr/local/prometheus-2.27.1.linux-amd64]# nohup ./prometheus &
[1] 3158
[root@prometheus /usr/local/prometheus-2.27.1.linux-amd64]# nohup: ignoring input and appending output to ‘nohup.out’

[root@prometheus /usr/local/prometheus-2.27.1.linux-amd64]# ps aux|grep prometheus
root       3158  1.5  0.5 777424 44632 pts/0    Sl   17:13   0:00 ./prometheus
root       3171  0.0  0.0 112660   972 pts/0    S+   17:14   0:00 grep --color=auto prometheus

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部署 grafana-server

wget http://101.34.22.188/grafana/grafana-7.3.6-1.x86_64.rpm
yum -y install grafana-7.3.6-1.x86_64.rpm
systemctl start grafana-server


账号密码默认为 admin,admin
grafana 默认配置文件目录 /etc/grafana/grafana.ini

可直接访问 ip:3000 进入 grafana 控制台
默认输入账号密码：admin admin 

创建 data sources  选择 prometheus 
定义 prometheus 节点 http://192.168.10.100:9090
-> 点击 save & text

点击 "+" 输入 import ，选择模板 7371，选择 prometheus 数据源 -> save 保存 mysqld-master-slave 监控
点击 "+" 输入 import ，选择模板 8919，选择 prometheus 数据源 -> save 保存 mysqld nodes 监控

点击 dashboard 选择以上两个模板

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