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http {
    ...
    proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=my_cache:10m max_size=10g inactive=60m use_temp_path=off;

    server {
        ...
    }
    ...
}

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http {
    ...
    server {
        ...
        location /update {
            proxy_pass http://backend;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;

            # ÕûÀí»º´æ
            proxy_cache_purge my_cache GET POST;
        }
        ...
    }
    ...
}

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yum install -y yum-utils

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yum-config-manager --add-repo=https://nginx.org/packages/centos/7/x86_64/

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yum install -y nginx-module-cache-purge

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systemctl restart nginx

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curl -X POST http://yourdomain.com/update

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crontab -e

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0 4 * * * curl -X POST http://yourdomain.com/update >> /tmp/nginx_cache_clear.log 2>&1

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