Prometheus部署监控容器

Prometheus搭建实例

1. Prometheus Server

Prometheus Server 本身也将以容器的方式运行在 host 192.168.11.133 上

2. Exporter

Prometheus 有很多现成的 Exporter,完整列表请参考 https://prometheus.io/docs/instrumenting/exporters/

使用：

Node Exporter 负责收集 host 硬件和操作系统数据

cAdvisor 负责收集容器数据

3.Grafana

显示多维数据，Grafana 本身也将以容器方式运行在 host 192.168.11.133 上

1.安装node Exporter收集主机数据需要在每个主机上都安装

docker run -d -p 9100:9100 \
-v "/proc:/host/proc" \
-v "/sys:/host/sys" \
-v "/:/rootfs" \
--net=host \
prom/node-exporter \
--path.procfs /host/proc \
--path.sysfs /host/sys \
--collector.filesystem.ignored-mount-points "^/(sys|proc|dev|host|etc)($|/)"


#Node Exporter 启动后,将通过 9100 提供 host 的监控数据
http://192.168.11.133:9100/metrics

node exporter安装

2.安装cAdvisor收集容器数据每个跑容器的主机上都需要安装

docker run \
--volume=/:/rootfs:ro \
--volume=/var/run:/var/run:rw \
--volume=/sys:/sys:ro \
--volume=/var/lib/docker/:/var/lib/docker:ro \
--publish=8080:8080 \
--detach=true \
--name=cadvisor \
--net=host \
google/cadvisor:latest



[root@node3 ~]# mount -o remount,rw '/sys/fs/cgroup'
[root@node3 ~]# ln -s /sys/fs/cgroup/cpu,cpuacct /sys/fs/cgroup/cpuacct,cpu

cAdvisor安装

3.选择一台主机安装Prometheus Server

docker run -d -p 9090:9090 \
-v /root/prometheus.yml:/etc/prometheus/prometheus.yml \
--name prometheus \
--net=host \
prom/prometheus

Prometheus server安装

global:
  scrape_interval:     15s # By default, scrape targets every 15 seconds.

  # Attach these labels to any time series or alerts when communicating with
  # external systems (federation, remote storage, Alertmanager).
  external_labels:
    monitor: 'codelab-monitor'

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: 'prometheus'

    # Override the global default and scrape targets from this job every 5 seconds.
    scrape_interval: 5s

    static_configs:
      - targets: ['localhost:9090','localhost:8080','localhost:9100','192.168.11.134:8080','192.168.11.134:9100']

prometheus.yml

static_configs: 指定从哪些 exporter 抓取数据.这里指定了两台 host 上的 Node Exporter 和 cAdvisor

所有 Target 的 State 都是 UP,说明 Prometheus Server 能够正常获取监控数据

4.安装Grafana 选择和Prometheus Server同一台主机

docker run -d -i -p 3000:3000 \
-e "GF_SERVER_ROOT_URL=http://grafana.server.name" \
-e "GF_SECURITY_ADMIN_PASSWORD=secret" \
--net=host \
grafana/grafana

-e "GF_SECURITY_ADMIN_PASSWORD=secret 指定了 Grafana admin用户密码 secret