k8s 日志按体现分类与采集思路

k8s-日志按体现分类与采集思路

1. k8s-日志按体现分类与采集思路

• 创建nginx服务为示例

  [root@k8s-master ~]# kubectl run nginx --image=nginx
  pod/nginx created
  [root@k8s-master ~]# kubectl get pods
  NAME                   READY   STATUS    RESTARTS   AGE
  nginx                  1/1     Running   0          3m29s
  web-5df8b97c79-hksfc   1/1     Running   0          42h
  [root@k8s-master ~]# kubectl exec -it nginx -- bash
  root@nginx:/# ls /var/log/nginx/
  access.log  error.log
  

  我们可以看到这里有日志文件，但是不会输出数据到文件，因为nginx把日志输出容器外

• 创建tomcat服务为示例

  [root@k8s-master ~]# kubectl run tomcat --image=tomcat
  pod/tomcat created
  [root@k8s-master ~]# kubectl get pods
  NAME                   READY   STATUS    RESTARTS   AGE
  nginx                  1/1     Running   0          14m
  tomcat                 1/1     Running   0          80s
  web-5df8b97c79-hksfc   1/1     Running   0          42h
  [root@k8s-master ~]# kubectl exec -it tomcat -- bash
  root@tomcat:/usr/local/tomcat# ls
  BUILDING.txt  CONTRIBUTING.md  LICENSE  NOTICE  README.md  RELEASE-NOTES  RUNNING.txt  bin  conf  lib  logs  native-jni-lib  temp  webapps  webapps.dist  work
  root@tomcat:/usr/local/tomcat# cd logs/
  root@tomcat:/usr/local/tomcat/logs# ls -a
  .  ..  catalina.2021-07-07.log  host-manager.2021-07-07.log  localhost.2021-07-07.log  localhost_access_log.2021-07-07.txt  manager.2021-07-07.log
  root@tomcat:/usr/local/tomcat/logs# cat localhost_access_log.2021-07-07.txt 
  10.244.235.192 - - [07/Jul/2021:05:15:42 +0000] "GET / HTTP/1.1" 404 682
  

  这里我们发现，tomcat服务我们请求后，是吧数据存放在容器里