prometheus之二：cAdvisor

一、cAdvisor的安装

1、docker拉取cadvisor镜像*

docker pull docker.io/google/cadvisor

2、运行一个容器，并配置

docker run \
              --volume=/:/rootfs:ro \
                --volume=/var/run:/var/run:rw \
                --volume=/sys:/sys:ro \
                --volume=/var/lib/docker/:/var/lib/docker:ro \
                --publish=8090:8080 \
                --detach=true \
                --name=cadvisor \
                google/cadvisor:latest

3、打卡网页查看

localhost:8090/containers/

4、修改configmap文件如下

apiVersion: v1
kind: ConfigMap
metadata:
  name: prometheus-config
  namespace: kube-ops
data:
  prometheus.yml: |
    global:
      scrape_interval: 15s
      scrape_timeout: 15s
    scrape_configs:
    - job_name: 'nodes'
      static_configs:
      - targets: ['localhost:9090']
    - job_name: 'container'
      static_configs:
      - targets: ['192.168.48.100:8090']

5、重新加载prometheus.yaml 

kill -HUP pid　

6、界面访问http://192.168.48.200:30132/targets，如图

二、Prometheus 中查看容器的 CPU，内存，网络流量等数据

CPU 使用率查询：

sum by (name) (rate(container_cpu_usage_seconds_total{image!=""}[1m])) / scalar(count(node_cpu{mode="user"})) * 100

内存使用量查询

sum by (name)(container_memory_usage_bytes{image!=""})

网络入口流量

sum by (name) (rate(container_network_receive_bytes_total{image!=""}[1m]))

网络出口流量

sum by (name) (rate(container_network_transmit_bytes_total{image!=""}[1m]))

磁盘使用量

sum by (name) (container_fs_usage_bytes{image!=""})