Docker状况监控

Docker容器监控

介绍

Portainer

Dokcer的轻量可视化面板，官方网站 Portainer - Docker可视化管理面板，这里只作为了解学习一下

步骤：

docker pull 6053537/portainer-ce

docker-compose.yaml

version: "2"
services:
  portainer:
    image: 6053537/portainer-ce:latest
    container_name: portainer
    restart: always
    ports:
      - 9000:9000
    volumes:
      - /mydata/monitorToDocker/portainer/data:/data
      - /var/run/docker.sock:/var/run/docker.sock

启动，然后通过9000端口进行访问即可

CAdvisor

CAdvisor可以监控容器的内存、CPU、网络IO、磁盘IO，默认只存储2分钟的数据，可以将监控数据保存到 InfluxDB、Elasticsearch等，缺陷是不支持多主机监控，且不具有告警的能力

拉取镜像 gcr.io/cadvisor 项目中国可用镜像列表 | 高速可靠的 Docker 镜像资源

docker pull swr.cn-north-4.myhuaweicloud.com/ddn-k8s/gcr.io/cadvisor/cadvisor:v0.52.1

docker-compose.yaml

version: "2"
services:
  cadvisor:
    image: swr.cn-north-4.myhuaweicloud.com/ddn-k8s/gcr.io/cadvisor/cadvisor:v0.52.1
    container_name: cadvisor
    volumes:
      - /:/rootfs:ro
      - /var/run:/var/run:ro
      - /sys:/sys:ro
      - /var/lib/docker/:/var/lib/docker:ro
      - /dev/disk/:/dev/disk:ro
    restart: always
    privileged: true
    devices:
      - /dev/kmsg:/dev/kmsg
    ports:
      - 8083:8080

启动，并访问8083端口

InfluxDB

InfluxDB是一个开源的分布式时序数据库，非常适合保存监控日志

学习网址：入门指南 · InfluxDB中文文档

拉取镜像

docker pull influxdb

docker-compose.yaml

version: "2"
services:
influxdb:
    image: influxdb:latest
    container_name: influxdb
    ports:
      - 8086:8086
    restart: always

启动，访问8086端口

Grafana

Grafana是可视化面板，并且具有警报功能

学习网站：[Grafana 入门指南 - 可观测中文社区](https://observability.cn/project/grafana/xxng9rfwgbvnpwq4/#_top)

拉取镜像

docker pull grafana/grafana

docker-compose.yaml

version: "2"
services:
  grafana:
    image: grafana/grafana:latest
    container_name: grafana
    ports:
      - 3000:3000
    restart: on-failure

Prometheus

学习网站：入门 | Prometheus - Prometheus 监控系统

拉取镜像

docker pull prom/prometheus

docker-compose.yaml

version: "2"
services:
  prometheus:
    container_name: prometheus
    image: prom/prometheus:latest
    volumes:
      - /mydata/monitorToDocker/prometheus/prometheus.yaml:/etc/prometheus/prometheus.yml
    ports:
      - 9090:9090
    restart: on-failure

对于更详细的配置可以查看Prometheus 配置文件详解 - kevin.Xiang - 博客园

prometheus.yaml

 my global config
global:
  scrape_interval:     15s # 将间隔设置为每15秒一次。默认是每1分钟一次。

scrape_configs:
  - job_name: 'prometheus'
  static_configs:
      - targets: ['localhost:9090']

监控系统

CAdvisor + Prometheus + Grafana

CAdvisor负责采集Docker的相关数据，Prometheus 从 CAdvisor定时收集对应的数据，Grafana负责将Prometheus收集的数据进行可视化

docker-compose.yaml

version: "2"
services:
  grafana:
    image: grafana/grafana:latest
    container_name: grafana
    ports:
      - 3000:3000
    restart: on-failure
    depends_on:
      - prometheus
  cadvisor:
    image: swr.cn-north-4.myhuaweicloud.com/ddn-k8s/gcr.io/cadvisor/cadvisor:v0.47.0
    container_name: cadvisor
    volumes:
      - /:/rootfs:ro
      - /var/run:/var/run:ro
      - /sys:/sys:ro
      - /var/lib/docker/:/var/lib/docker:ro
      - /dev/disk/:/dev/disk:ro
    restart: always
    privileged: true
    devices:
      - /dev/kmsg:/dev/kmsg
    ports:
      - 8083:8080
  prometheus:
    container_name: prometheus
    image: prom/prometheus:latest
    volumes:
      - /mydata/monitorToDocker/prometheus/prometheus.yaml:/etc/prometheus/prometheus.yml
    ports:
      - 9090:9090

promethues.yaml

global:
  scrape_interval:     15s # 15秒采集一次
  evaluation_interval: 15s # 每15秒计算一次
  
scrape_configs:
  - job_name: 'prometheus'
    static_configs:
      - targets: ['localhost:9090']

  - job_name: 'cadvisor'
    static_configs:
      - targets: ['cadvisor:8080'] # cadvisor是我定义的容器名

启动并访问 9090 端口，选择 Status -> Targets ，查看节点状态

访问3000端口，先配置Connections -> Data Sources，再配置Dashboards，这里使用Grafana的Dashboards时候可能出现版本不兼容的情况，这里我使用ID为193的模板