Prometheus Operator 修改数据存储时间

前面说了prometheus operator持久化的问题，但是还有一个问题很多人都忽略了，那就是prometheus operator数据保留天数，根据官方文档的说明，默认prometheus operator数据存储的时间为1d，这个时候无论你prometheus operator如何进行持久化，都没有作用，因为数据只保留了1天，那么你是无法看到更多天数的数据
Prometheus
关于prometheus operator更多监控可以参考下面的文章

Prometheus Operator 监控k8s组件

新闻联播老司机

Prometheus Operator

新闻联播老司机

官方文档可以配置的说明

图片来自官方文档
如果你的prometheus operator想使用NFS持久化可以看下面的文章，和本次修改prometheus operator默认持久化数据不冲突

Prometheus Operator 持久化存储

新闻联播老司机

实际上修改prometheus operator时间是通过retention参数进行修改，上面也提示了在prometheus.spec下填写

#接下来进行填写,首先我们先下载operator，并将目录进行分类
wget -P /root/ http://down.i4t.com/abcdocker-prometheus-operator.yaml.zip
cd /root/
unzip abcdocker-prometheus-operator.yaml.zip
mkdir kube-prom
cp -a kube-prometheus-master/manifests/* kube-prom/
cd kube-prom/
mkdir -p node-exporter alertmanager grafana kube-state-metrics prometheus serviceMonitor adapter operator
mv *-serviceMonitor* serviceMonitor/
mv setup operator/
mv grafana-* grafana/
mv kube-state-metrics-* kube-state-metrics/
mv alertmanager-* alertmanager/
mv node-exporter-* node-exporter/
mv prometheus-adapter* adapter/
mv prometheus-* prometheus/
mv 0prometheus-operator-* operator/
mv 00namespace-namespace.yaml operator/


#接下来需要修改prometheus operator的deployment文件
cd /root/kube-prom/prometheus/
vim prometheus-prometheus.yaml
在spec.下面添加
retention: 7d

如果已经安装了可以直接修改prometheus-prometheus.yaml 然后通过kubectl apply -f 刷新即可
修改完毕后检查pod运行状态是否正常

[root@YZSJHL82-101 ~]# kubectl  get all -n monitoring 
NAME                                       READY   STATUS    RESTARTS   AGE
pod/alertmanager-main-0                    2/2     Running   0          44h
pod/alertmanager-main-1                    2/2     Running   0          44h
pod/alertmanager-main-2                    2/2     Running   0          44h
pod/grafana-558647b59-tlp8s                1/1     Running   0          44h
pod/kube-state-metrics-5bfc7db74d-8d4jk    4/4     Running   0          44h
pod/node-exporter-jwl9v                    2/2     Running   0          44h
pod/node-exporter-nxn2w                    2/2     Running   0          44h
pod/node-exporter-s6lpr                    2/2     Running   0          44h
pod/prometheus-adapter-57c497c557-svfs8    1/1     Running   0          44h
pod/prometheus-k8s-0                       3/3     Running   1          44h
pod/prometheus-k8s-1                       3/3     Running   1          44h
pod/prometheus-operator-69bd579bf9-tzr5z   1/1     Running   0          44h

NAME                            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)             AGE
service/alertmanager-main       ClusterIP   10.254.149.37            9093/TCP            44h
service/alertmanager-operated   ClusterIP   None                     9093/TCP,6783/TCP   44h
service/grafana                 NodePort    10.254.134.244           3000:20614/TCP      44h
service/kube-state-metrics      ClusterIP   None                     8443/TCP,9443/TCP   44h
service/node-exporter           ClusterIP   None                     9100/TCP            44h
service/prometheus-adapter      ClusterIP   10.254.7.111             443/TCP             44h
service/prometheus-k8s          NodePort    10.254.130.51            9090:13535/TCP      44h
service/prometheus-operated     ClusterIP   None                     9090/TCP            44h
service/prometheus-operator     ClusterIP   None                     8080/TCP            44h

NAME                           DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR                 AGE
daemonset.apps/node-exporter   3         3         3       3            3           beta.kubernetes.io/os=linux   44h

NAME                                  READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/grafana               1/1     1            1           44h
deployment.apps/kube-state-metrics    1/1     1            1           44h
deployment.apps/prometheus-adapter    1/1     1            1           44h
deployment.apps/prometheus-operator   1/1     1            1           44h

NAME                                             DESIRED   CURRENT   READY   AGE
replicaset.apps/grafana-558647b59                1         1         1       44h
replicaset.apps/kube-state-metrics-5bfc7db74d    1         1         1       44h
replicaset.apps/prometheus-adapter-57c497c557    1         1         1       44h
replicaset.apps/prometheus-operator-69bd579bf9   1         1         1       44h

NAME                                 READY   AGE
statefulset.apps/alertmanager-main   3/3     44h
statefulset.apps/prometheus-k8s      2/2     44h

接下来可以访问grafana或者prometheus ui进行检查 (我这里修改完毕后等待2天，检查数据是否正常)
修改前

修改后

相关文章：

1. Kubernetes 1.14 二进制集群安装
2. Prometheus Operator 监控k8s组件
3. Kubenetes 1.13.5 集群二进制安装
4. Kuerbernetes 1.11 集群二进制安装