快速搭建Docker监控

`以下内容均使用centos7为实施环境，使用root账户登陆`

# 部署
为了方便演示以及避免错误，我采用脚本的方式来部署。演示环境采用3台虚机，IP为172.16.10.230/1/2.
[![granafa](https://cdn.sujx.net/image/granafa_index.png "granafa")](https://cdn.sujx.net/image/granafa_index.png "granafa")
## 监控节点以及应用准备
首先启动sysdig本地监控程序、Weave Scope图形化监控程序、cAdvisor监控脚本和prometheus监控节点
```bash
#!/bin/bash

#Clean Env
docker stop `docker ps -a -q`
docker rm `docker ps -a -q`

#Monitor Node
scope launch 172.16.10.230 172.16.10.231 172.16.10.232
docker run -itd --name sysdig-$HOSTNAME -v /dev/:/host/dev -v /var/run/docker.sock:/host/var/run/docker.sock --privileged -v /proc:/host/proc:ro -v /boot:/boot:ro -v /usr:/host/usr:ro -v /lib/modules:/host/lib/modules:ro -v /usr:/host/usr:ro sysdig/sysdig
docker run -itd --name cadivisor-$HOSTNAME --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
docker run -itd --name prom-node-$HOSTNAME -p 9100:9100 -v "/proc:/host/proc" -v "/sys:/host/sys" -v "/:/rootfs" --net=host prom/node-exporter --path.procfs /host/proc --path.sysfs /host/sys --collector.filesystem.ignored-mount-points "^/(sys|proc|dev|host|etc)($|/)"

#Example Docker
docker run -itd --name centos-$HOSTNAME centos
docker run -itd --name httpd-$HOSTNAME httpd -p 80:80

#Show Dockers
docker ps
````
我们现在就能看到很多监控内容了
[![weavescope_docker](https://cdn.sujx.net/weavescope-docker.png "weavescope_docker")](https://cdn.sujx.net/weavescope-docker.png "weavescope_docker")
## 服务端准备
在各个节点启动监控node之后，再在主host(172.16.10.230)上启动Prometheus服务端和Granafa前端展示程序。
```bash
#!/bin/bash
cd /root

#config
touch prometheus.yml
#ym编辑文件不允许使用tab表示空格
tee prometheus.yml <<- 'EOF'
global:
  scrape_interval:     15s
  evaluation_interval: 15s
  external_labels:
        monitor: 'codelab-monitor'
scrape_configs: 
  - job_name: 'prometheus'
    scrape_interval: 5s
    static_configs:
      - targets: ['localhost:9090','localhost:8080','localhost:9100','172.16.10.232:8080','172.16.10.232:9100','172.16.10.231:8080','172.16.10.231:9100']
EOF

#Prometheus Server
docker run -itd --name prometheus -v /root/prometheus.yml:/etc/prometheus/prometheus.yml  -p 9090:9090 --net=host prom/prometheus

#Granafa
docker run -itd --name grafana-$HOSTNAME -p 3000:3000 -e "GF_SERVER_ROOT_URL=http://grafana.server.name" -e "GF_SECURITY_ADMIN_PASSWORD=secret" --net=host grafana/grafana

#Show Dockers
docker ps -a
```
就能看到服务端情况
[![Prometheus](https://cdn.sujx.net/prometheus_server.png "Prometheus")](https://cdn.sujx.net/prometheus_server.png "Prometheus")
然后就可以把监控数据导入granafa来进行前端展示。
至此，初步的docker监控搭建完成。

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