（openEuler21.03-x86）prometheus-2.16.0+grafana-7.2.0监控mysql8

#关闭防火墙和 selinux 并重启
sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
systemctl disable --now firewalld

#配源
vim /etc/yum.repos.d/openEuler.repo

[OS]
name=OS
baseurl=http://repo.openeuler.org/openEuler-21.03/OS/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-21.03/OS/$basearch/RPM-GPG-KEY-openEuler

[everything]
name=everything
baseurl=http://repo.openeuler.org/openEuler-21.03/everything/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-21.03/everything/$basearch/RPM-GPG-KEY-openEuler

[EPOL]
name=EPOL
baseurl=http://repo.openeuler.org/openEuler-21.03/EPOL/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-21.03/OS/$basearch/RPM-GPG-KEY-openEuler

[debuginfo]
name=debuginfo
baseurl=http://repo.openeuler.org/openEuler-21.03/debuginfo/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-21.03/debuginfo/$basearch/RPM-GPG-KEY-openEuler

[source]
name=source
baseurl=http://repo.openeuler.org/openEuler-21.03/source/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-21.03/source/RPM-GPG-KEY-openEuler

[update]
name=update
baseurl=http://repo.openeuler.org/openEuler-21.03/update/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-21.03/OS/$basearch/RPM-GPG-KEY-openEuler

#更新yum源
yum makecache

1、安装prometheus-2.16.0

#prometheus官网
https://prometheus.io/download/
#通过wget下载prometheus
wget https://github.com/prometheus/prometheus/releases/download/v2.16.0/prometheus-2.16.0.linux-amd64.tar.gz
#同步时间
yum install -y  ntpdate && ntpdate time.windows.com

#解压-安装
ll
#解压至/usr/local/
tar -zxvf prometheus-2.16.0.linux-amd64.tar.gz -C /usr/local/
#将prometheus-2.16.0.linux-amd64改名为prometheus
mv /usr/local/prometheus-2.16.0.linux-amd64/  /usr/local/prometheus
cd /usr/local/prometheus
ll
#启动Prometheus—使用默认配置文件启动
/usr/local/prometheus/prometheus --config.file="/usr/local/prometheus/prometheus.yml" &

#查看9090端口是否开启
ss -anlt | grep 9090

#通过浏览器进入页面
IP:9090
#数据展示
IP:9090/metrics

说明有数据

2、安装grafana-7.2.0

#安装go语言环境
yum -y install go

#下载grafana-7.2.0-1.x86_64.rpm
wget https://dl.grafana.com/oss/release/grafana-7.2.0-1.x86_64.rpm
#安装
yum -y install grafana-7.2.0-1.x86_64.rpm

#开机自启grafana-server
systemctl enable grafana-server
#开启grafana-server
systemctl start grafana-server
#浏览器输入IP:3000
账号密码默认admin/admin
设置新密码

#yum安装docker
yum -y install docker
#或一键用docker安装grafana
docker run -d --name=grafana -p 3000:3000 grafana/grafana-enterprise

#分解步骤
# 在docker库中查找grafana镜像
docker search grafana				
# 从docker库拉取grafana镜像
docker pull grafana/grafana	
# 查看docker镜像	
docker images						
#启动Grafana镜像
docker run -d -p 3000:3000 --name grafana grafana/grafana
	-d: deamon, 后台启动
	-p: port, 端口映射，宿主机端口:容器内端口, 3000为grafana的web界面端口
	--name grafana: 启动的程序名，此处为grafana
	grafana/grafana: 程序启动依赖的docker镜像
docker ps -a		

#查看是否安装有数据库，避免mariadb和mysql数据库冲突
rpm -qa | grep -i mariadb
rpm -qa | grep -i mysql
yum -y remove mariadb-connector-c-3.0.6-7.oe1.x86_64
#查看可安装的mysql数据库
yum list mysql
yum clean all
yum makecache
#安装数据库，启动数据库，并开机自启
yum  -y install mysql mysql-libs mysql-devel mysql-server
systemctl enable mysqld.service
systemctl start mysqld.service
#初始化 mariadb 并配置 root 密码
mysql_secure_installation 

#直接回车，空
是否设置密码：y
输入设置密码：
再次输入密码：
是否移除anonymous用户：y
是否不允许root远程登录：n
是否移除test数据库：y
是否更新：y

4、配置prometheus-2.16.0+grafana-7.2.0

/etc/hosts文件（添加路由），配置完路由后，服务器相互ping通即可
vi /etc/hosts

#Prometheus可以查看到监控的数据

#Grafana主界面配置prometheus数据源，服务器收集到的数据作为数据源添加到Grafana，这样Grafana就能把Prometheus的数据进行可视化。 

#上传安装mysqld_exporter组件，改名
tar xf mysqld_exporter-0.11.0.linux-amd64.tar.gz -C /usr/local/
mv /usr/local/mysqld_exporter-0.11.0.linux-amd64/  /usr/local/mysqld_exporter
ls /usr/local/mysqld_exporter

#进入数据库，授权
mysql -u root -p
mysql> grant select,replication client,process ON *.* to 'mysql_monitor'@'localhost' identified by '111111';
Query OK, 0 rows affected, 1 warning (0.01 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> quit
创建mysql配置文件
vi /usr/local/mysqld_exporter/.my.cnf

[client]
user=mysql_monitor
password=111111

#启动mysqld_exporter
nohup /usr/local/mysqld_exporter/mysqld_exporter --config.my-cnf=/usr/local/mysqld_exporter/.my.cnf &
#确认端口
ss -anlt | grep 9104

#添加Prometheus服务器配置，在最后添加如下内容（配置格式要注意，不然开启prometheus服务会报错）
vi /usr/local/prometheus/prometheus.yml

  - job_name: mysqld
    static_configs:
      - targets: ['IP:9104']

#重启prometheus服务
pkill prometheus
/usr/local/prometheus/prometheus --config.file="/usr/local/prometheus/prometheus.yml" &

#上传至/var/lib/grafana/
unzip grafana-dashboards-master.zip
cp -R /var/lib/grafana/grafana-dashboards-master/dashboards/ /var/lib/grafana/

#更改grafana配置文件
vi /etc/grafana/grafana.ini

[dashboards.json] 
enabled = true 
path = /var/lib/grafana/dashboards

#重启Grafana服务
systemctl restart grafana-server