K8S Nginx Ingress Controller client_max_body_size 上传文件大小限制

现象

k8s集群中，上传图片时，大于1M就会报错 413 Request Entity Too Large
Nginx Ingress Controller 的版本是 0.29.0

解决方案

1. 修改configmap

kubectl edit configmap nginx-configuration -n ingress-nginx

在 ConfigMap 的 data 字段中设置参数：

data:
  proxy-body-size: "30m"

示例：

apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-configuration
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
data:
  proxy-body-size: "30m"

2. 手动重新载入 Nginx

kubectl delete pod -n ingress-nginx [nginx-ingress-controller-pod-name]

3. 验证

查看nginx配置中client_max_body_size的值

kubectl exec -n ingress-nginx [nginx-ingress-controller-pod-name] -- cat /etc/nginx/nginx.conf