Prometheus+Grafana监控Ceph集群

1.安装Grafana

（1）配置yum源文件

# vim /etc/yum.repos.d/grafana.repo
[grafana]
name=grafana
baseurl=https://packages.grafana.com/oss/rpm
repo_gpgcheck=1
enabled=1
gpgcheck=1
gpgkey=https://packages.grafana.com/gpg.key
sslverify=1
sslcacert=/etc/pki/tls/certs/ca-bundle.crt

（2）通过yum命令安装grafana

# yum -y install grafana

（3）启动grafana并设为开机自启

# systemctl start grafana-server.service 
# systemctl enable grafana-server.service

2.安装Prometheus

（1）下载安装包，下载地址
https://prometheus.io/download/
（2）解压压缩包

# tar fvxz prometheus-2.14.0.linux-amd64.tar.gz

（3）将解压后的目录改名

# mv prometheus-2.14.0.linux-amd64 /opt/prometheus

（4）查看promethus版本

# ./prometheus --version

（5）配置系统服务启动

# vim /etc/systemd/system/prometheus.service
[Unit]
Description=Prometheus Monitoring System
Documentation=Prometheus Monitoring System

[Service]
ExecStart=/opt/prometheus/prometheus \
  --config.file /opt/prometheus/prometheus.yml \
  --web.listen-address=:9090

[Install]
WantedBy=multi-user.target

（6）加载系统服务

# systemctl daemon-reload

（7）启动服务和添加开机自启动

# systemctl start prometheus
# systemctl enable prometheus

3.ceph mgr prometheus插件配置

# ceph mgr module enable prometheus
# netstat -nltp | grep mgr 检查端口
# curl 127.0.0.1:9283/metrics  测试返回值

4.配置Prometheus

vim prometheus.yml
- job_name: 'ceph_cluster'
    honor_labels: true
    scrape_interval: 5s
    static_configs:
      - targets: ['xxxxxxxx:9283']
        labels:
          instance: ceph

重启Prometheus，并在web查看targets

systemctl restart prometheus

也可以kill -HUP Prometheus（pid）
支持热加载配置文件

5.配置Grafana

1、浏览器登录 grafana 管理界面
2、添加data sources，点击configuration–》data sources
3、添加dashboard，点击HOME–》find dashboard on grafana.com
4、搜索ceph的dashboard
5、点击HOME–》Import dashboard, 选择合适的dashboard，记录编号
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