docker容器监控-prometheus

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一、docker容器查看资源

docker stats #可以查看容器使用了多少资源、实时刷新的

docker stats --no-stream #打印到屏幕上

然后可以使用awk过滤，然后使用zabbix监控

二、普罗米修斯-prometheus

prometheus官网里面有下载地址和采集器等等等

1、客户端节点安装node-exporter

[root@1 ~]# docker run -d -p 9100:9100 -v "/:/host:ro,rslave" --name=node_exporter quay.io/prometheus/node-exporter --path.rootfs /host
85b5bfd1c14b2931f46c8ac03c40cd7c08446d7b94e61f1a5634a6beab61bb66

2、安装cadvisor

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 --privileged=true --name=cadvisor --restart=always google/cadvisor:latest

遇到问题已启动就挂，查看日志；docker logs cadvisor

F0919 06:02:52.698457 1 cadvisor.go:172] Failed to start container manager: inotify_add_watch /sys/fs/cgroup/cpuacct,cpu: no such file or directory
W0919 06:02:53.823651 1 container.go:409] Failed to create summary reader for "/system.slice/YDService.service": none of the resources are being tracked.
F0919 06:02:53.880059 1 cadvisor.go:172] Failed to start container manager: inotify_add_watch /sys/fs/cgroup/cpuacct,cpu: no such file or directory

解决：

[root@1 ~]# mount -o remount,rw '/sys/fs/cgroup'
[root@1 ~]# ln -s /sys/fs/cgroup/cpu,cpuacct /sys/fs/cgroup/cpuacct,cpu

再次启动完成；

3、安装prometheus

https://github.com/prometheus/prometheus/releases/download/v2.21.0/prometheus-2.21.0.linux-amd64.tar.gz

二进制包，也可以使用docker安装哈

（1）将包放入到opt目录，进行解压

[root@kache opt]# tar xf prometheus-2.21.0.linux-amd64.tar.gz
#修改配置文件

[root@kache prometheus-2.21.0.linux-amd64]# tail -11 prometheus.yml
- job_name: 'prometheus'
static_configs:
- targets: ['localhost:9090']

- job_name: 'cadvisor1'
static_configs:
- targets: ['49.234.14.64:8080']

- job_name: 'node_exporter'
static_configs:
- targets: ['49.234.14.64:9100']

集群版：

[root@kache prometheus-2.21.0.linux-amd64]# tail -11 prometheus.yml
- job_name: 'prometheus'
static_configs:
- targets: ['localhost:9090']

- job_name: 'cadvisor1'
static_configs:
- targets: ['49.234.14.64:8080','10.0.0.1:8080']

- job_name: 'node_exporter'
static_configs:
- targets: ['49.234.14.64:9100','10.0.0.1:9100']

启动prometheus