环境 centos7.6、 nginx 1.16.1
1、安装 nginx，需要配置 epel 源（略）
yum install -y nginx
2、启动 nginx
systemctl start nginx systemctl enable nginx
3、配置 nginx 反向代理 http://10.2.1.16。
开通 nginx 服务器访问 10.2.1.16 端口权限（略）
这里配置 worker_processes 4，一般根 cpu 核数一致
worker_connections 1024，跟内存大小相关
修改 404 html 页面到 custom_404.html
修改 50x html 页面到 custom_50x.html
[root@ansible002 ~]# cat /etc/nginx/nginx.conf
user nginx;
worker_processes 4;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
http {
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 /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
# Load modular configuration files from the /etc/nginx/conf.d directory.
# See http://nginx.org/en/docs/ngx_core_module.html#include
# for more information.
include /etc/nginx/conf.d/*.conf;
server {
listen 90;
server_name localhost;
include /etc/nginx/default.d/*.conf;
location / {
proxy_pass http://10.2.1.16;
}
#修改 404 html 页面到 custom_404.html
error_page 404 /custom_404.html;
location /custom_404.html {
root /usr/share/nginx/html;
internal;
}
#修改 50x html 页面到 custom_50x.html
error_page 500 502 503 504 /custom_50x.html;
location /custom_50x.html {
root /usr/share/nginx/html;
internal;
}
}
}
4、编辑 404、50x html 文件
[root@ansible002 ~]# cat /usr/share/nginx/html/custom_404.html <h1 style='color:red'>Error 404: Not found :</h1> <p>I have no idea where that file is, sorry. Are you sure you typed in the correct URL?</p>
[root@ansible002 ~]# cat /usr/share/nginx/html/custom_50x.html <h1>Oops! Something went wrong...</h1> <p>We seem to be having some technical difficulties. Hang tight.</p>
5、更新 nginx 配置
nginx -s reload
6、测试
访问一个不存在的页面测试 404，比如 http://nginx_ip/xxx。
修改 proxy_pass http://10.2.1.16 为proxy_pass http://10.2.1.16:9099;，代理一个不存在的服务，nginx -s reload, 访问 http://nginx_ip 测试 50x
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