Nginx起動時にエラー「80 failed (97: Address family not supported by protocol)」

事象

dc_proxy | nginx: [emerg] socket() [::]:80 failed (97: Address family not supported by protocol)

原因

proxy/etc/nginx/nginx.conf

server個所抜粋。以下の「listen [::]:80 default_server;」が原因。 IPv6のところをコメントアウトする といいらしい。

参考サイト： https://akira-junkbox.blogspot.com/2016/02/nginx80-failed-97-address-family-not.html

    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }

対応

「listen [::]:80 default_server; 」をコメントアウト

    server {
        listen       80 default_server;
        #listen       [::]:80 default_server;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }