Mongodb_exporter开启--collect-all仅导出mongodb_up指标求助

问题描述 #

在K8S环境中以Sidecar Pod方式运行mongodb_exporter（MongoDB的Prometheus指标导出器），遇到以下异常：

• 导出器启动无报错，但仅能获取Go相关指标和mongodb_up 1这一个MongoDB指标
• 即使开启--collect-all或--collector.collstats参数，也无法获取config库的集合大小等有效业务指标
• 数据库连接正常（修改账号密码/端口会触发明确的连接错误）
• 已为exporter用户配置admin库的clusterMonitor权限和local库的read权限

Pod配置 #

- name: metrics
          image: docker.io/bitnami/mongodb-exporter:latest
          command:
            - /bin/bash
            - '-ec'
          args:
            - >
              /bin/mongodb_exporter --web.listen-address ":9216"
              --mongodb.uri=mongodb://exporter:password@localhost:27017/config? --log.level="debug"  --collect-all
          ports:
            - name: metrics
              containerPort: 9216
              protocol: TCP
          env:
          resources:
            limits:
              cpu: 50m
              memory: 250Mi
            requests:
              cpu: 25m
              memory: 50Mi
          livenessProbe:
            httpGet:
              path: /
              port: metrics
              scheme: HTTP
            initialDelaySeconds: 15
            timeoutSeconds: 5
            periodSeconds: 5
            successThreshold: 1
            failureThreshold: 3
          readinessProbe:
            httpGet:
              path: /
              port: metrics
              scheme: HTTP
            initialDelaySeconds: 5
            timeoutSeconds: 1
            periodSeconds: 5
            successThreshold: 1
            failureThreshold: 3

日志信息 #

导出器启动日志（开启debug） #

time="2023-02-03T09:02:25Z" level=debug msg="Compatible mode: false"
time="2023-02-03T09:02:25Z" level=debug msg="Connection URI: mongodb://exporter:password@localhost:27017/config?"
level=info ts=2023-02-03T09:02:25.224Z caller=tls_config.go:195 msg="TLS is disabled." http2=false

已展示的指标 #

# HELP collector_scrape_time_ms Time taken for scrape by collector
# TYPE collector_scrape_time_ms gauge
collector_scrape_time_ms{collector="general",exporter="mongodb"} 0
# HELP go_gc_duration_seconds A summary of the pause duration of garbage collection cycles.
# TYPE go_gc_duration_seconds summary
go_gc_duration_seconds{quantile="0"} 0
go_gc_duration_seconds{quantile="0.25"} 0
go_gc_duration_seconds{quantile="0.5"} 0
go_gc_duration_seconds{quantile="0.75"} 0
go_gc_duration_seconds{quantile="1"} 0
go_gc_duration_seconds_sum 0
go_gc_duration_seconds_count 0
# HELP go_goroutines Number of goroutines that currently exist.
# TYPE go_goroutines gauge
go_goroutines 17
# HELP go_info Information about the Go environment.
# TYPE go_info gauge
go_info{version="go1.17.13"} 1
# HELP go_memstats_alloc_bytes Number of bytes allocated and still in use.
# TYPE go_memstats_alloc_bytes gauge
go_memstats_alloc_bytes 3.655088e+06
# HELP go_memstats_alloc_bytes_total Total number of bytes allocated, even if freed.
# TYPE go_memstats_alloc_bytes_total counter
go_memstats_alloc_bytes_total 3.655088e+06
[....]
# HELP mongodb_up Whether MongoDB is up.
# TYPE mongodb_up gauge
mongodb_up 1
[...]
# HELP process_virtual_memory_bytes Virtual memory size in bytes.
# TYPE process_virtual_memory_bytes gauge
process_virtual_memory_bytes 7.35940608e+08
# HELP process_virtual_memory_max_bytes Maximum amount of virtual memory available in bytes.
# TYPE process_virtual_memory_max_bytes gauge
process_virtual_memory_max_bytes 1.8446744073709552e+19

环境信息 #

• K8S环境
• MongoDB版本：4.2.0

恳请各位提供排查思路或解决方案！

内容的提问来源于stack exchange，提问作者Doul