Prometheus实战篇:Prometheus监控mongodb

version: '3'
services:
   mongo:
 	image: mongo:4.2.5
 	container_name: mongo
 	 restart: always
 	 volumes:
 	 	- /data/mongo/db: /data/db
 	 port:
 	 - 27017:27017
 	 command: [--auth]
 	 enviroment:
 	 	MONGO_INITDB_ROOT_USERNAME: root
 	 	MONGO_INITDB_ROOT_PASSWORD: 123456

docker-compose up -d

docker exec -it mongo mongo admin

> db.auth('root','123456')
1
>db.createUser({ user: 'exporter',pwd : 'password',roles:[{role: 'readAnyDatabase',db : admin},{role: 'clusterMonitor',db : admin}]})
#测试 使用上面创建的用户信息进行连接
> db.auth('exporter','password')
1
#表示成功
> exit

docker run -d  -p 9216:9216 -p 17001:17001 --restart=always  --name mongodb-exporter bitnami/mongodb_exporter :latest --collect-all --compatible-mode --mongodb.uri=mongodb://exporter:password@localhost:27017/admin?ssl=false

cat >docker-compose.yml << EOF
version: '3.3'
services:
 mongodb_exproter:
 	image: bitnami/mongodb_exporter:latest
 	container_name: mongodb_exproter
 	restart: always
 	environment:
 		MONGODB_URI: "mongodb://exporter:password@localhost:27017/admin?ssl=false"
 	command:
 		- '--collect-all'
 		- '--compatible-mode'
 	port:
 	 - "9216:9216"
EOF

docker-compose up -d

查看正在运行的容器
docker ps

或者:

查看mongodb_exporter容器的运行日志
docker logs -f mongodb_exporter

cd /data/docker-prometheus

# 在scrapc_configs(搜刮配置):下面增加如下配置:
cat >prometheus/prometheus.yml <<FOF
 - job_name: 'mongodb_exporter'
   static_configs:
   - targets: ['localhost:9216']
   	 labels:
   	 	instance: test服务器 
EOF

curl -x POST http://localhost:9090/-/reload

mongodb_ss_connections{conn_type="available"} 可用的连接数

mongodb_ss_mem_virtual
mongodb_ss_mem_residenl


#关于server status
mongodb_up	服务器是否在线
mongodb_ss_ok{cl_id="",cl_role="current",rs_state="0"}	服务器是否正常运行,取值为1,0.标签中记录了Cluster,ReplicaSet
mongodb_ss_uptime	服务器的运行时长,单位为秒
mongdb_ss_connections{conn_type="current"}	客户端连接数

# 关于主机
mongodb_sys_cpu_num_cpus	主机的CPU核数

# 关于 collection
mongodb_collstats_storageStats_count{database="xx",collection="xx"}	collection 全部文档的数量
mongodb_collstats_storageStats_size	collection全部文档的体积,单位bytes
mongodb_collstats_storageStats_storageSize	collection全部文档占用的磁盘空间,默认会压缩
delta(mongodb_collstats_latencyStats_reads_ops[1m])	collection读操作的数量(每分钟)
delta(mongodb_collstats_latencyStats_reads_latency[1m])	collection读操作的延迟(每分钟),单位为微秒
mongodb_collstats_latencyStats_write_ops
mongodb_collstats_latencyStats_write_latency

rule_files:
	- "alert.yml"
	- "rules/*.yml"

cat >prometheus/rules/mongodb.yml <<FOF
groups:
- name: PerconaMongodbExporter
	rules:
    - alert: MongodbDown
      expr: 'mongodb_up == 0'
      for: 0m
      labels:
        severity: critical
      annotations:
          summary: "MongoDB Down,容器:$labels.instance"
          description: "MongoDB 容器 is down,当前值{{ $value }}"
    - alert: MongodbNumberCursorsOpen
      expr: 'mongodb_ss_metrics_cursor_open{csr_type="total"}' > 10
      for: 2m
      labels:
        severity: warning
      annotations:
          summary: "MongoDB 数字游标打开告警 容器:{{$labels.instance }}"
          description: "MongoDB为客户端打开的游标过多>10k,当前值为:{{ $value }}"
    - alert: MongdbCursorsTimeouts
      expr: 'increase(mongodb_ss_metrics_cursor_timedOut[1m]) > 100'
      for: 2m
      labels:
        severity: warning
      annotations:
          summary: "MongDB 游标超时,容器:{{$labels.instance }}"
          description: "太多游标超时,当前值为:{{ $value }}"
    - alert: MongodbVirtualMemoryUsage
      expr: '(sum(mongodb_ssmem_virtual BY (instance) / sum(mongodb_ss_mem_resident) BY (instance)) > 3'
      for: 2m
      labels:
        severity: warning
      annotations:
          summary: "MongoDB虚拟内存使用告警,容器:{{$labels.instance }}"
          description: "虚拟内存使用过高,当前值为:{{ $value }}"
   
EOF

docker exec -it prometheus promtool check config /etc/prometheus/prometheus.yml

curl -x POST http://localhost:9090/-/reload