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prometheus可以拆分成多个节点进行指标收集。
安装环境:CentOS7
安装prometheus
wget -c zxvf prometheus-2.23.0.linux-amd64.tar.gz -C /opt/cd /opt/ln -s prometheus-2.23.0.linux-amd64 prometheuscat > /etc/systemd/system/prometheus.service <<EOF[Unit]Description=prometheusAfter=network.target[Service]Type=simpleWorkingDirectory=/opt/prometheusExecStart=/opt/prometheus/prometheus --config.file="/opt/prometheus/prometheus.yml"LimitNOFILE=65536PrivateTmp=trueRestartSec=2StartLimitInterval=0Restart=always[Install]WantedBy=multi-user.targetEOFsystemctl daemon-reload systemctl enable prometheussystemctl start prometheus配置Prometheus
这里配置的是监听/opt/prometheus/servers/目录下的json文件
cat > /opt/prometheus/prometheus.yml <<EOF# my global configglobal: scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute. evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute. # scrape_timeout is set to the global default (10s).# Alertmanager configurationalerting: alertmanagers: - static_configs: - targets: # - alertmanager:9093# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.rule_files: # - "first_rules.yml" # - "second_rules.yml"# A scrape configuration containing exactly one endpoint to scrape:# Here it's Prometheus itself.scrape_configs: # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config. - job_name: 'prometheus' # metrics_path defaults to '/metrics' # scheme defaults to 'http'. static_configs: - targets: ['localhost:9090'] - job_name: 'servers' file_sd_configs: - refresh_interval: 61s files: - /opt/prometheus/servers/*.jsonEOFsystemctl restart prometheusjson格式
每个json文件需要是一个数组对象,如果不需要自定义标签,可以直接写到targets里面去也可以,可以有多个文件
[ { "targets": [ "192.168.1.164:9100" ], "labels": { "instance": "192.168.1.164", "job": "node_exporter" } }, { "targets": [ "192.168.1.167:9100" ], "labels": { "instance": "192.168.1.167", "job": "node_exporter" } }]
安装node_exporter
安装到/opt/node_exporter路径下,保持默认的端口
zxvf node_exporter-1.0.1.linux-amd64.tar.gz -C /opt/cd /opt/ln -s node_exporter-1.0.1.linux-amd64 node_exportercat > /etc/systemd/system/node_exporter.service <<EOF[Unit]Description=node_exporterAfter=network.target[Service]Type=simpleWorkingDirectory=/opt/node_exporterExecStart=/opt/node_exporter/node_exporterLimitNOFILE=65536PrivateTmp=trueRestartSec=2StartLimitInterval=0Restart=always[Install]WantedBy=multi-user.targetEOFsystemctl daemon-reloadsystemctl enable node_exportersystemctl start node_exporter图形展示
直接安装grafana进行展示
yum -y install enable grafana-serversystemctl start grafana-server
启动之后,grafana默认监听的是3000端口,直接使用浏览器进行访问就可以了,默认用户名密码是admin/admin,第一次登陆之后会提示修改。
配置数据源:鼠标左边的菜单 Configuration -> Data Source -> Add data source -> 选择prometheus -> url那栏填入prometheus的地址就可以了 -> 最后 Save & test 就可以了。
grafana.com/grafana/dashboards 官网已经有人做好的模板,我们直接import进来就可以了。
导入面板:鼠标左边的菜单 Dashboards -> Import -> 填入id -> Load -> 选择数据源就可以了。
我经常用的是:1860 、8919 这两个来查看node_exporter监控
总结
安装这些服务都是使用systemd进行管理的,操作起来比较方便的。
这里没有设置告警,可以根据自己的需要设置对应的告警规则,使用alertmanager进行告警。
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