Prometheus环境搭建
1 安装prometheus
1.1将prometheus安装包上传到服务器的/usr/local目录下，进行解压
[root@prometheus-1 local]# ls
bin etc games include lib lib64 libexec prometheus sbin share src
[root@prometheus-1 local]# pwd
/usr/local
1.2进行环境验证
[root@prometheus-1 prometheus]# ./prometheus --version
prometheus, version 2.6.0 (branch: HEAD, revision: dbd1d58c894775c0788470944b818cc724f550fb)
build user: root@bf5760470f13
build date: 20181217-15:14:46
go version: go1.11.3
1.3修改配置文件prometheus.yml
修改以后内容如下所示
global:
alerting:
alertmanagers:
- static_configs:
- targets:
rule_files:
scrape_configs:
- job_name: 'prometheus'
static_configs:
- targets: ['192.168.101.21:9090', '192.168.101.37:9090', '192.168.101.32:9090']
- job_name: 'node-1'
static_configs:
- targets: ['192.168.101.33:9100']
labels:
instance: server1
- job_name: 'node-2'
static_configs:
- targets: ['192.168.101.39:9100']
labels:
instance: server2
1.4 设置用户
添加用户，后期使用此账号启动服务
groupadd prometheus
useradd -g prometheus -s /sbin/nologin prometheus
赋权
chown -R prometheus:prometheus /usr/local/prometheus/
创建prometheus运行数据目录
mkdir -p /var/lib/prometheus
chown -R prometheus:prometheus /var/lib/prometheus/
设置开机启动
touch /usr/lib/systemd/system/prometheus.service
chown prometheus:prometheus /usr/lib/systemd/system/prometheus.service
修改新创建的prometheus.service文件
[root@prometheus-1 prometheus]# cat /usr/lib/systemd/system/prometheus.service
[Unit]
Description=Prometheus
Documentation=https://prometheus.io/
After=network.target
[Service]
# Type设置为notify时，服务会不断重启
Type=simple
User=prometheus
# --storage.tsdb.path是可选项，默认数据目录在运行目录的./dada目录中
ExecStart=/usr/local/prometheus/prometheus --config.file=/usr/local/prometheus/prometheus.yml --storage.tsdb.path=/var/lib/prometheus
Restart=on-failure
[Install]
WantedBy=multi-user.target
开启服务
systemctl start prometheus
systemctl status prometheus
systemctl enable prometheus
2 安装node_exporter
添加用户，后期使用此账号启动服务
groupadd prometheus
useradd -g prometheus -s /sbin/nologin prometheus
赋权
chown -R prometheus:prometheus /usr/local/node_exporter/
修改配置文件/usr/lib/systemd/system/node_exporter.service
修改后内容如下所示
[root@nodeexport-1 ~]# cat /usr/lib/systemd/system/node_exporter.service
[Unit]
Description=node_exporter
Documentation=https://prometheus.io/
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/node_exporter/node_exporter
Restart=on-failure
[Install]
WantedBy=multi-user.target
开启服务
systemctl start node_exporter
systemctl status node_exporter
systemctl enable node_exporter
3 安装grafana
[root@prometheus-1 ~]# rpm -ivh grafana-5.4.1-1.x86_64.rpm --nodeps
warning: grafana-5.4.1-1.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID 24098cb6: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:grafana-5.4.1-1 ################################# [100%]
登录http://192.168.101.45:3000，进入grafana首界面
Grafana导入dashboard.json文件
文件下载地址：
http://blog.csdn.net/ywd1992/article/details/85989259
prometheus节点
在安装mysqld-exporter过程中，需要注意在prometheus节点安装mysql相应的客户端
安装如下所示
mysql-community-client-5.7.24-1.el7.x86_64.rpm
mysql-community-common-5.7.24-1.el7.x86_64.rpm
mysql-community-libs-5.7.24-1.el7.x86_64.rpm
在安装mysql相应安装包的过程中需要卸载redhat自带的包，如下所示
rpm -e mariadb-libs-5.5.60-1.el7_5.x86_64 –nodeps
mysql节点
在/usr/local/mysqld_exporter-0.11.0.linux-amd64目录下配置配置文件.my.conf
内容如下所示：
[client]
user=root
password=admin123
安装好mysql以后可以通过在/etc/my.cnf配置文件中添加如下内容从而实现可以不通过密码登录数据库
在[mysqld]下添加如下内容
skip-grant-tables
登录到数据库以后可以通过如下命令设置数据库密码
update mysql.user set authentication_string=password(‘admin123’) where user=’root’;
flush privileges;使修改密码指令立即生效
此刻可以修改去掉在my.cnf配置文件中添加的内容，重启数据库，此刻可以通过设置的密码进行登录。
设置prometheus远程登录mysql节点的权限
GRANT ALL PRIVILEGES ON *.* TO ‘root’@ ’IP’ IDENTIFIED BY ‘admin123’ WITH GRANT OPTION.
如果启动mysql_exporter过程中报错数据库登录密码过期，可以采用如下方法解决：
alter user ‘root’@’localhost’ identified by ‘admin123’;
flush privileges;
