[英]Random/Intermittent 502 gateway errors with nginx and node deployments using proxy_pass on a k8s cluster
我现在的配置如下
裸机集群。 SELINUX 状态为关闭。
我通过 ngnix 服务提供静态内容,使用节点服务提供动态内容。 下面是我的 nginx 配置。
worker_processes 4;
#error_log logs/error.log info;
error_log /dev/stdout info;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
tcp_nopush on;
#keepalive_timeout 0;
#keepalive_timeout 5;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /dev/stdout main;
server {
listen 1080;
server_name localhost $hostname;
root /usr/share/nginx/static/;
# static content
location ~ some-regex {
alias /usr/share/nginx/static/;
# handle cors see 'NGINX-Cookbook' for production quality
add_header 'Access-Control-Allow-Origin' '*';
}
# forward request to node-service
location / {
client_max_body_size 128M;
proxy_buffer_size 256k;
proxy_buffers 4 512k;
proxy_busy_buffers_size 512k;
proxy_http_version 1.1;
# proxy_set_header Connection "";
# proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $http_host;
proxy_cache_bypass $http_upgrade;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# proxy_socket_keepalive on;
proxy_pass http://nodeserver:3000;
}
}
include servers/*;
}
在我的入口中,我正在访问 nginx 服务。 我能够将我的请求正确转发到节点服务几次并获得正确的响应,但大约 50% 的请求失败并出现 502 错误网关错误,我在 nginx pod 日志中看到此错误
[错误] 20#20:*187 connect() 失败(111:连接被拒绝),同时连接到上游,客户端:10.44.0.2,服务器:本地主机,请求:“GET /path HTTP/1.1”,上游:“http: //node-service-clusterip:3000/path", host: "my-nginx-node.example.com"
我尝试了 nginx 文档中的多个指令,但无济于事。 任何帮助将非常感激
我的 kubernetes 标签选择器有错误。 我在多个部署中使用了相同的选择器,这导致了路由问题。
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