基于grafana+prometheus构建Flink监控
Posted zhouyuekji
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先上一个架构图：
Flink App
： 通过report 将数据发出去
Pushgateway : Prometheus 生态中一个重要工具
Prometheus : 一套开源的系统监控报警框架 （Prometheus 入门与实践）
Grafana： 一个跨平台的开源的度量分析和可视化工具，可以通过将采集的数据查询然后可视化的展示，并及时通知（可视化工具Grafana：简介及安装）
Node_exporter : 跟Pushgateway一样是Prometheus 的组件，采集到主机的运行指标如CPU, 内存，磁盘等信息
以下安装，大部分参考博客： https://www.cnblogs.com/xiao987334176/p/9930517.html#autoid-0-0-0
1、docker pull 镜像
docker pull prom/node-exporter docker pull prom/pushgateway docker pull prom/prometheus docker pull grafana/grafana
查看下载的镜像
$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE prom/prometheus latest d5b9d7ed160a 2 weeks ago 138MB grafana/grafana latest a6e14b4109af 2 weeks ago 253MB prom/pushgateway latest 20e6dcae675f 4 weeks ago 19.2MB prom/node-exporter latest e5a616e4b9cf 2 months ago 22.9MB
2、编辑prometheus.yml 、创建 Grafana 数据存储目录
$ mkdir /opt/grafana-storage # grafana 数据存储目录
$ cat /opt/prometheus/prometheus.yml # prometheus 配置
global:
scrape_interval: 60s
evaluation_interval: 60s
scrape_configs:
- job_name: prometheus
static_configs:
- targets: [‘localhost:9090‘]
labels:
instance: prometheus
- job_name: linux
static_configs:
- targets: [‘venn:9100‘]
labels:
instance: localhost
- job_name: ‘pushgateway‘
static_configs:
- targets: [‘venn:9091‘]
labels:
instance: ‘pushgateway‘
3、启动各个组件
docker run -d -p 3000:3000 --name=grafana -v /opt/grafana-storage:/var/lib/grafana grafana/grafana docker run -d -p 9100:9100 -v "/proc:/host/proc:ro" -v "/sys:/host/sys:ro" -v "/:/rootfs:ro" --net="host" prom/node-exporter docker run -d -p 9090:9090 -v /opt/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml prom/prometheus docker run -d -p 9091:9091 prom/pushgateway
查看docker进程
$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 4a689cf48e10 prom/pushgateway "/bin/pushgateway" 5 days ago Up 5 days 0.0.0.0:9091->9091/tcp infallible_goldstine fcc40433bf75 grafana/grafana "/run.sh" 5 days ago Up 5 days 0.0.0.0:3000->3000/tcp grafana 8ba942d0cf35 prom/prometheus "/bin/prometheus --c…" 5 days ago Up 5 days 0.0.0.0:9090->9090/tcp quizzical_colden b84b0f4be2b2 prom/node-exporter "/bin/node_exporter" 5 days ago Up 5 days fervent_poitras
查看端口
$ netstat -apn | grep -E ‘9091|3000|9090|9100‘ (Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.) tcp 0 0 172.17.0.1:39028 172.17.0.4:9091 ESTABLISHED - tcp6 0 0 :::9100 :::* LISTEN - tcp6 0 0 :::3000 :::* LISTEN - tcp6 0 0 :::9090 :::* LISTEN - tcp6 0 0 :::9091 :::* LISTEN - tcp6 0 0 192.168.229.129:45864 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.129:45856 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.129:45824 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.129:45874 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.129:45854 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.129:45836 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.129:45814 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.128:9100 192.168.229.1:13405 ESTABLISHED - tcp6 0 0 192.168.229.129:45826 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.129:45844 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.128:9091 172.17.0.2:53930 ESTABLISHED - tcp6 0 0 192.168.229.129:45846 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.128:9100 172.17.0.2:54776 ESTABLISHED - tcp6 0 0 192.168.229.129:45816 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.129:45876 192.168.229.128:9091 ESTABLISHED 40846/java tcp6 0 0 192.168.229.129:45834 192.168.229.128:9091 TIME_WAIT - tcp6 0 0 192.168.229.129:45866 192.168.229.128:9091 TIME_WAIT -
4、查看组件页面
node_exporter: ip:9100/metrics
查看 prometheus： ip:9090/targets
如果state 不是 UP 的，等一会就起来了
查看Grafana：
默认用户名密码 ： amin/admin
此处不再赘述，配置数据源、创建系统负载监控参考博客：https://www.cnblogs.com/xiao987334176/p/9930517.html#autoid-0-0-0
5、配置Flink report ：
在Flink 配置文件 flink-conf.yml 中添加如下内容：
##metrics metrics.reporter.promgateway.class: org.apache.flink.metrics.prometheus.PrometheusPushGatewayReporter metrics.reporter.promgateway.host: venn metrics.reporter.promgateway.port: 9091 metrics.reporter.promgateway.jobName: myJob metrics.reporter.promgateway.randomJobNameSuffix: true metrics.reporter.promgateway.deleteOnShutdown: false
启动一个任务（上一篇博客的案例迟到数据处理）：
flink run -m yarn-cluster -ynm LateDataProcess -yn 1 -c com.venn.stream.api.sideoutput.lateDataProcess.LateDataProcess jar/flinkDemo-1.0.jar
查看任务webUI：
PS：任务已经跑了一段时间了
6、Grafana 中配置Flink监控
由于上面一句配置好Flink report、 pushgateway、prometheus，并且在Grafana中已经添加了prometheus 数据源，所以Grafana中会自动获取到 flink job的metrics 。
Grafana 首页，点击New dashboard，创建一个新的dashboard
选中之后，即会出现对应的监控指标
至此，Flink 的metrics 的指标展示在Grafana 中了
flink 指标对应的指标名比较长，可以在Legend 中配置显示内容，在{{key}} 将key换成对应需要展示的字段即可，如： {{job_name}},{{operator_name}}
对应显示如下：
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