## 1 mongodb_exporter部署 ### 1.1 安装 ```bash wget https://github.com/percona/mongodb_exporter/releases/download/v0.11.2/mongodb_exporter-0.11.2.linux-amd64.tar.gz tar xf mongodb_exporter-0.11.2.linux-amd64.tar.gz -C /opt/ cd /opt &&mv mongodb_exporter-0.11.2.linux-amd64.tar.gz mongodb_exporter ``` ### 1.2 启动 ```bash #无密码 /opt/mongodb_exporter/mongodb_exporter --mongodb.uri=mongodb://172.16.0.9:27017 #有密码 /opt/mongodb_exporter/mongodb_exporter --mongodb.uri=mongodb://user:password@172.16.0.9:27017 cat </usr/lib/systemd/system/mongodb_exporter.service [Unit] Description=MongoDB Exporter User=root [Service] Type=simple Restart=always ExecStart=/opt/mongodb_exporter/mongodb_exporter -- mongodb.uri=mongodb://172.16.0.9:27017 [Install] WantedBy=multi-user.target EOF systemctl start mongodb_exporter&&systemctl enable mongodb_exporter ``` mongodb_exporter暴露的endpoint端口默认为9216 ```bash curl http://172.16.0.9:9216/metrics ``` ## 2 配置prometheus连接mongodb_exporter ```yml - job_name: 'elasticsearch_exporter' scrape_interval: 10s metrics_path: "/metrics" static_configs: - targets: ['172.16.0.9:9216'] ``` ## 3 Grafana dashboard 导入mongodb监控模板，dashboard Id：`2583` `12079` ## 4 添加mongodb监控告警 ```yml groups: - name: mongodb rules: - alert: MongodbDown expr: mongodb_up == 0 for: 0m labels: severity: critical annotations: summary: MongoDB Down (instance {{ $labels.instance }}) description: "MongoDB instance is down\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - alert: MongodbReplicationLag expr: mongodb_mongod_replset_member_optime_date{state="PRIMARY"} - ON (set) mongodb_mongod_replset_member_optime_date{state="SECONDARY"} > 10 for: 0m labels: severity: critical annotations: summary: MongoDB replication lag (instance {{ $labels.instance }}) description: "Mongodb replication lag is more than 10s\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - alert: MongodbReplicationHeadroom expr: (avg(mongodb_mongod_replset_oplog_tail_timestamp - mongodb_mongod_replset_oplog_head_timestamp) - (avg(mongodb_mongod_replset_member_optime_date{state="PRIMARY"}) - avg(mongodb_mongod_replset_member_optime_date{state="SECONDARY"}))) <= 0 for: 0m labels: severity: critical annotations: summary: MongoDB replication headroom (instance {{ $labels.instance }}) description: "MongoDB replication headroom is <= 0\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" - alert: MongodbTooManyConnections expr: avg by(instance) (rate(mongodb_connections{state="current"}[1m])) / avg by(instance) (sum (mongodb_connections) by (instance)) * 100 > 80 for: 2m labels: severity: warning annotations: summary: MongoDB too many connections (instance {{ $labels.instance }}) description: "Too many connections (> 80%)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}" ```