监控环境:Prometheus
数据库:MongoDB 3.4.6 集群,3个节点
监控工具:mongodb_exporter
1、创建Mongodb监控可读账号
mongodb admin 库中执行
use admin
db.createUser({
user: "prometheus",
pwd: "prometheus",
roles: [
{ role: "read", db: "admin" },
{ role: "readAnyDatabase", db: "admin" },
{ role: "clusterMonitor", db: "admin" }
]
});
2、下载MongoDB监控软件
地址: https://github.com/percona/mongodb_exporter
我使用的:mongodb_exporter-0.11.2.linux-amd64.tar.gz 版本
3、配置文件
nohup ./mongodb_exporter --mongodb.uri mongodb://root:[email protected]:27017/admin --collect.database --collect.collection --collect.topmetrics --collect.indexusage --collect.connpoolstats --suppress.collectshardingstatus &
mongodb_exporter暴露的endpoint端口默认为9216
[root@prometheus-server exporter]# ./mongodb_exporter --help
usage: mongodb_exporter [<flags>]
exports various MongoDB metrics in Prometheus format.
Flags:
-h, --help Show context-sensitive help (also try --help-long and --help-man).
--web.auth-file=WEB.AUTH-FILE
Path to YAML file with server_user, server_password keys for HTTP Basic authentication (overrides HTTP_AUTH environment variable).
--web.ssl-cert-file=WEB.SSL-CERT-FILE
Path to SSL certificate file.
--web.ssl-key-file=WEB.SSL-KEY-FILE
Path to SSL key file.
--web.listen-address=":9216"
Address to listen on for web interface and telemetry.
--web.telemetry-path="/metrics"
Path under which to expose metrics.
--collect.database Enable collection of Database metrics
--collect.collection Enable collection of Collection metrics
--collect.topmetrics Enable collection of table top metrics
--collect.indexusage Enable collection of per index usage stats
--collect.connpoolstats Collect MongoDB connpoolstats
--suppress.collectshardingstatus
Suppress the collection of Sharding Status
--mongodb.uri=[mongodb://][user:pass@]host1[:port1][,host2[:port2],...][/database][?options]
MongoDB URI, format
--test Check MongoDB connection, print buildInfo() information and exit.
--version Show application version.
--log.level="info" Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal]
--log.format="logger:stderr"
Set the log target and format. Example: "logger:syslog?appname=bob&local=7" or "logger:stdout?json=true"
配置启动服务
vim /usr/lib/systemd/system/mongodb_exporter.service
[Unit]
Description=mongodb_exporter
Documentation=https://github.com/percona/mongodb_exporter
After=network.target
[Service]
Type=simple
User=prometheus
Environment="MONGODB_URI=mongodb://mongodb_exporter:123456@localhost:27017"
ExecStart=/usr/local/bin/mongodb_exporter --log.level=error \
--collect.database \
--collect.collection \
--collect.topmetrics \
--collect.indexusage \
--collect.connpoolstats
Restart=on-failure
[Install]
WantedBy=multi-user.target
4、prometheus配置基于文件的自动发现
- job_name: 'mongo_cluster'
file_sd_configs:
- files: ['/usr/local/prometheus/sd_config/mongo_cluster.yaml']
refresh_interval: 5s
root:/usr/local/prometheus# cat /usr/local/prometheus/sd_config/mongo_cluster.yaml
- targets:
- "192.168.88.140:9216"
- "192.168.88.141:9216"
- "192.168.88.142:9216"
labels:
project: mongo
unitname: "Mongodb_exporter"
service: mongo
5、grafana配置mongo展示图
导入图:16974
MongoDB信息 | Grafana Labs (这个模板是自己绘制的,有基础的可以二次开发)
__EOF__
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