脚本宝典收集整理的这篇文章主要介绍了释放占用端口，脚本宝典觉得挺不错的，现在分享给大家，也给大家做个参考。
目录
1. 找到系统当前所有的端口
2. 找到对应端口在系统中的进程 ID(PID)
3. 使用 kill -9 [PID] 命令结束进程
使用 netstat 命令查找本机各端口的网络连接情况
~]netstat -nulpt #结果如下 Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 127.0.0.1:6379 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:1997 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN tcp6 0 0 :::80 :::* LISTEN tcp6 0 0 :::22 :::* LISTEN tcp6 0 0 ::1:25 :::* LISTEN tcp6 0 0 :::3306 :::* LISTEN这里我们要找的是 80与443 端口
依据查找到的 1997 端口找到对应进程, lsof -i :1997, 注意 : 冒号不要漏掉了
lsof -i:80 #结果如下 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME tke-gatew 6360 root 10u IPv6 6410452 0t0 TCP *:http (LISTEN)[root@VM-0-114-centos ~]# lsof -i:443 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME tke-gatew 7627 root 9u IPv6 7717644 0t0 TCP *:https (LISTEN) ......... ->172.80.31.2:https (ESTABLISHED) galaxy 25638 root 8u IPv4 6276795 0t0 TCP <机密省略>:57802- ..........
通过 lsof 命令我们找到了进程的 PID: 29416,接下来就是使用 kill -9 [PID] 把进程结束就好了
kill -9 6360 kill -9 25638 kill -9 7627到这里就 OK 了，不过为了保险起见，再次执行 netstat -tln 确认是否结束了端口占用
前情提要
在布置k8s的时候发现容器报错如
~]kubectl get pods -A -o wide ..... pot nginx-ingress-nginx-ingress-85d747cfb4-9hk72 0/1 CrashLoopBackOff .....然后想describe查看了一下报错如下
~]kubectl describe pod -n pot nginx-ingress-nginx-ingress-85d747cfb4-9hk72 ......... Warning BackOff 3m14s (x613 over 137m) kubelet Back-off restarting failed container最后logs查看发现端口被占用
~]# kubectl logs pods -n pot nginx-ingress-nginx-ingress-85d747cfb4-9hk72 Error from server (NotFound): pods "pods" not found [root@VM-0-114-centos ~]# kubectl logs -n pot nginx-ingress-nginx-ingress-85d747cfb4-9hk72 I1104 10:51:46.738108 1 main.go:169] Starting NGINX Ingress controller Version=1.6.3 GitCommit=b9378d56 2021/11/04 10:51:46 [emerg] 19#19: bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) 2021/11/04 10:51:46 [emerg] 19#19: bind() to 0.0.0.0:443 failed (98: Address already in use) ....... 2021/11/04 10:51:46 [notice] 19#19: try again to bind() after 500ms 2021/11/04 10:51:46 [emerg] 19#19: still could not bind() nginx: [emerg] still could not bind()运用了以上步骤之后回复正常
pot nginx-ingress-nginx-ingress-85d747cfb4-9hk72 1/1 Running
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