K8S集群部署的项目重启失败，过了很久自己重启成功，进去查看工作节点的日志，发现出现错误的那段时间
有一个pod启动失败 “ks-sonarqube-postgresql-7bfb68699d-fx4qj_kubesphere-devops-system sonarqube-postgresql” failed (failure) ”
查询该pod的日志：
LOG: database system was interrupted; last known up at 2020-12-17 01:34:16 UTC
LOG: database system was not properly shut down; automatic recovery in progress
LOG: invalid record length at 0/1FA41F0: wanted 24, got 0
LOG: redo is not required
LOG: MultiXact member wraparound protections are now enabled
LOG: database system is ready to accept connections
LOG: autovacuum launcher started
很奇怪为什么项目重启会影响到这个pod重启，是因为部署的项目pod重启的时候数据库连接数过大吗？
还有 ks-sonarqube-postgresql-7bfb68699d-fx4qj 是部署集群的时候默认安装的，我想知道这个pod的作用是什么呢？
期待各位大神的回复，非常感谢！
@Feynman
