Question

我们有静态nginx缓存，集群中的每个节点都像负载均衡器和数据节点一样。

我们正在使用一致性哈希进行负载平衡。这是简单的设置

HTTP客户端->负载均衡器-> [如果结果在缓存中可用，则返回]->使用一致哈希散列路由-> [如果缓存，则返回]-> [从s3读取]

代理缓存路径：

proxy_cache_path /var/cache/lb-nginx
                 levels=1:2 keys_zone=lb_cache:10m max_size=200g
                 loader_files=10000 loader_threshold=10m loader_sleep=50ms
                 inactive=365d use_temp_path=off;

proxy_cache_path /var/cache/nginx
                 levels=1:2 keys_zone=s3_cache:10m max_size=600g
                 loader_files=10000 loader_threshold=10m loader_sleep=50ms
                 inactive=365d use_temp_path=off;

上游配置

# load balancer redirects autogen
upstream backend {
    hash $request_uri consistent;
    # This helps to not to create connection to backend everytime.
    keepalive 34 ;
}

# load balancer end point
server {
    error_log    /var/log/nginx/xxx_debug_lb.log debug;
    listen 80;
    server_name hostname.abc.yyz 1.2.3.4; # hostname ipaddress

    location / {
        resolver 1.2.3.4;

        # refer : http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_intercept_errors
        # Proxy backend settings.
        proxy_intercept_errors on;

        proxy_pass http://backend;

        error_log    /var/log/nginx/_debug_lb_2.log debug;

        # Cache results in LB as well to save bandwidth
        proxy_cache            lb_cache;
        proxy_cache_valid      200 30d; # 30 days
        proxy_cache_valid      404 1d; # 1 day
        proxy_cache_use_stale  error timeout http_500 http_502 http_503 http_504;
        proxy_cache_lock       on;
        proxy_cache_bypass     $http_cache_purge;
        # disable convert get to head, otherwise, HEAD request will be denied
        proxy_cache_convert_head off;
        # disable cache convert requires setting cache key, $request_method is not part of proxy_cache_key by default
        proxy_cache_methods GET HEAD;
        proxy_cache_key $scheme$host$request_method$request_uri;

        add_header             Cache-Control max-age=2851000;
        add_header             X-Lb-Cache-Status $upstream_cache_status;
        # http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_cache_valid
        # make sure the response will be cached.
        proxy_ignore_headers   Set-Cookie;
    }
}

S3终点

server {
    error_log    /var/log/nginx/_debug_s3.log debug;
    listen 80 default_server;

    location /lua_debug {
        return 200 "Hello world!";
    }

    location / {
        # Calling aws_auth, to set HTTP Headers
        set $s3_host s3.amazonaws.com;
        set $bucket "abcd"
        set $s3_uri "/$bucket$uri";
        access_by_lua "local aws = require 'resty.aws_auth'; aws.s3_set_headers(ngx.var.s3_host, ngx.var.s3_uri)";
        # Somehow nginx is looking for resolver ¯\_(ツ)_/¯
        resolver 1.2.3.4;

        # refer : http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_intercept_errors
        # Proxy backend settings.
        proxy_intercept_errors on;
        proxy_pass             https://$s3_host$s3_uri;


        error_log    /var/log/nginx/_debug_s3_2.log debug;

        # Cache related settings
        proxy_cache            s3_cache;
        proxy_cache_valid      200 365d; # 1year
        proxy_cache_valid      404 1d; # 1day
        proxy_cache_use_stale  error timeout http_500 http_502 http_503 http_504;
        proxy_cache_lock       on;
        proxy_cache_bypass     $http_cache_purge;
        # disable convert get to head, otherwise, HEAD request will be denied
        proxy_cache_convert_head off;
        # disable cache convert requires setting cache key, $request_method is not part of proxy_cache_key by default
        proxy_cache_methods GET HEAD;
        proxy_cache_key $scheme$request_method$proxy_host$request_uri;

        add_header             Cache-Control max-age=31536000;
        add_header             X-Cache-Status $upstream_cache_status;
        # http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_cache_valid
        # make sure the response will be cached.
        proxy_ignore_headers   Set-Cookie;

    }
}

但是，当我尝试使用IP地址（由于server_name支持ip和主机名）来达到负载平衡器时， 1.对于初始请求，它显示缓存-HIT / MISS

X缓存状态：HIT X-Lb-Cache-Status：MISS

用于HIT / HIT的后续请求

X缓存状态：HIT X-Lb-Cache-Status：命中率
大约15分钟后，再次出现缓存未命中

X缓存状态：HIT X-Lb-Cache-Status：MISS

有人可以帮助我，我想念什么？

Nginx配置带有两个带有两个不同缓存的服务器块

0 个答案: