Docker系列08：容器监控

1 监控解决方案

cadvisor+influxdb+grafana

cAdvisor：Google开源的工具，用于监控Docker主机和容器系统资源，通过图形页面实时显示数据，但不存储；它通过宿主机/proc、/sys、/var/lib/docker等目录下文件获取宿主机和容器运行信息。

InfluxDB：是一个分布式的时间序列数据库，用来存储cAdvisor收集的系统资源数据。

Grafana：可视化展示平台，可做仪表盘，并图表页面操作很方面，数据源支持zabbix、Graphite、InfluxDB、OpenTSDB、Elasticsearch等

它们之间关系：

cAdvisor容器数据采集->InfluxDB容器数据存储->Grafana可视化展示

2 下载docker镜像

2.1 下载influxdb镜像

docker pull tutum/influxdb

输出如下：

Using default tag: latest
latest: Pulling from tutum/influxdb
a3ed95caeb02: Pull complete
23efb549476f: Pull complete
aa2f8df21433: Pull complete
ef072d3c9b41: Pull complete
c9f371853f28: Pull complete
a248b0871c3c: Pull complete
749db6d368d0: Pull complete
db2492acfcc3: Pull complete
b7e7d2e12d53: Pull complete
4272a53eef10: Pull complete
9b2fefdb5321: Pull complete
Digest: sha256:5b7c5e318303ad059f3d1a73d084c12cb39ae4f35f7391b79b0ff2c0ba45304b
Status: Downloaded newer image for tutum/influxdb:latest

$ docker images
REPOSITORY                       TAG                   IMAGE ID            CREATED             SIZE
tutum/influxdb                   latest                c061e5808198         years ago         290MB

2.2 下载cadvisor镜像

$ docker pull google/cadvisor:latest
latest: Pulling from google/cadvisor
ff3a5c916c92: Pull complete
44a45bb65cdf: Pull complete
0bbe1a2fe2a6: Pull complete
Digest: sha256:815386ebbe9a3490f38785ab11bda34ec8dacf4634af77b8912832d4f85dca04
Status: Downloaded newer image for google/cadvisor:latest

镜像信息如下：

$ docker images
REPOSITORY                       TAG                   IMAGE ID            CREATED             SIZE
google/cadvisor                  latest                eb1210707573         months ago        .6MB

2.3 下载grafana镜像

$ docker pull grafana/grafana:latest
latest: Pulling from grafana/grafana
f7e2b70d04ae: Pull complete
a0d6f8d6b78d: Pull complete
f6dfdd9a4cc9: Pull complete
a47b02586edb: Pull complete
ac3d2f7cc2e4: Pull complete
857ef2887ebc: Pull complete
Digest: sha256:e3796f399ae4f3f85e21807f88675d8ce2221b6011d3c3dd4e7eebce883f157b
Status: Downloaded newer image for grafana/grafana:latest

镜像信息如下：

$ docker images
REPOSITORY                       TAG                   IMAGE ID            CREATED             SIZE
grafana/grafana                  latest                d20d0cdfb55e         days ago         241MB

3. 启动监控

3.1 启动influxdb容器

$docker run -d -p : -p : --name influxdb tutum/influxdb
eeb5f0a22e4c75b779be62161ce58055b9e6f497f144cb509a96b6e1735b9786

启动后信息如下：

 $docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                                            NAMES
eeb5f0a22e4c        tutum/influxdb      "/run.sh"            seconds ago      Up  seconds       0.0.0.0:->/tcp, 0.0.0.0:->/tcp   influxdb

3.2 启动cadvisor容器

$docker run -d \
--volume=/:/rootfs:ro \
--volume=/var/run:/var/run:rw \
--volume=/sys:/sys:ro \
--volume=/var/lib/docker/:/var/lib/docker:ro \
--link influxdb:influxdb \
-p : \
--name=cadvisor \
google/cadvisor:latest \
-storage_driver=influxdb \
-storage_driver_db=cadvisor \
-storage_driver_host=influxdb:

3.3 启动grafana容器

$docker run -d \
-p : \
-e INFLUXDB_HOST=influxdb \
-e INFLUXDB_PORT= \
-e INFLUXDB_NAME=cadvisor \
-e INFLUXDB_USER=cadvisor \
-e INFLUXDB_PASS=cadvisor \
--link influxdb:influxsrv \
--name grafana \
grafana/grafana