k8s集群通过nginx-ingress做tcp\udp 4层网络转发

k8s集群可以通过nginx-ingress做tcp\udp 4层网络转发

1.先确认K8S集群是否开启tcp/udp

[root@k8s-master-pro01 tmp]# kubectl get cm -n ingress-nginx 
NAME                              DATA   AGE
ingress-controller-leader-nginx   0      18h
ingress-nginx-controller          0      18h
kube-root-ca.crt                  1      18h
tcp-services                      1      18h
udp-services                      1      18h

2.确认已经开启后，修改tcp-services 和udp-services  的cm

  我的环境需要增加多个tcp胡端口分别为6622/6620/6621/2001

kubectl edit cm tcp-services -n ingress-nginx 
apiVersion: v1
data:
  "6622": prod/tgs2:6622
  "6621": prod/tgs2:6621
  "6620": prod/tgs2:6620
  "2001": prod/tgs2:2001
kind: ConfigMap
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"v1","kind":"ConfigMap","metadata":{"annotations":{},"name":"tcp-services","namespace":"ingress-nginx"}}
  creationTimestamp: "2022-11-15T07:54:20Z"
  name: tcp-services
  namespace: ingress-nginx
  resourceVersion: "194865"

此时进入ingress-nginx的pod再去看nginx的conf就可以看到新增的端口

bash-5.1$ cat nginx.conf|grep 6622
      ngx.var.proxy_upstream_name="tcp-prod-tgs2-6622";
    listen                  6622;
    listen                  [::]:6622;
bash-5.1$ cat nginx.conf|grep 6621
      ngx.var.proxy_upstream_name="tcp-prod-tgs2-6621";
    listen                  6621;
    listen                  [::]:6621;
bash-5.1$ cat nginx.conf|grep 6622
      ngx.var.proxy_upstream_name="tcp-prod-tgs2-6622";
    listen                  6622;
    listen                  [::]:6622;
bash-5.1$ cat nginx.conf|grep 2001
      ngx.var.proxy_upstream_name="tcp-prod-tgs2-2001";
    listen                  2001;
    listen                  [::]:2001;

udp同理操作

此时网页打开测试：