ingress-nginx自定义最大请求头大小

1、首先添加一个configmap叫nginx-config

apiVersion: v1
data:
  client-header-buffer-size: 32k
  client-max-body-size: 5m
  gzip-level: "7"
  large-client-header-buffers: 4 32k
  proxy-connect-timeout: 11s
  proxy-read-timeout: 12s
  use-geoip2: "true"
  use-gzip: "true"
kind: ConfigMap

2、配置ingress-nginx-controller的deployment添加arg，指定configmap=kube-system/nginx-config

...
    spec:
      containers:
      - args:
        - /nginx-ingress-controller
        - --default-backend-service=kube-system/nginx-ingress-default-backend
        - --election-id=ingress-controller-leader
        - --ingress-class=nginx
        - --tcp-services-configmap=kube-system/tcp-services
        - --configmap=kube-system/nginx-config
        - --default-ssl-certificate=$(POD_NAMESPACE)/ssl-wehgc-com
...

3、登陆ingress-nginx的pod，查看是否生效

[root@k8s_client ~]# kubectl -n kube-system exec -it nginx-ingress-controller-58f7fcbc76-9n6z2 bash
www-data@nginx-ingress-controller-58f7fcbc76-9n6z2:/etc/nginx$ grep large_client_header_buffers nginx.conf 
    large_client_header_buffers     4 32k;

PS：注意 要用client-header-buffer-size而不是 client_header_buffer_size，要不然不会生效，因为配置普通nginx的时候是用client_header_buffer_size，而在K8s的configmap的时候要用client-header-buffer-size，但是登陆pod查看的时候仍然是以client_header_buffer_size显示。

来源：oschina

链接：https://my.oschina.net/u/4398470/blog/4927038