How does certificate.call() work ?

[Luigi Sambolino]

Hi,

In our infrastructure we are using Kubernetes 1.13 together with NGINX ingress-Controller 0.24.1 and OpenResty/lua (How do we check the installed version?).

In /etc/nginx/nginx.conf we see:

        listen 443 proxy_protocol  default_server reuseport backlog=511 ssl http2;
       
        # PEM sha: 539006fba9301ae42c72984bc8044ab6a9fafa00
        ssl_certificate                         /etc/ingress-controller/ssl/default-fake-certificate.pem;
        ssl_certificate_key                     /etc/ingress-controller/ssl/default-fake-certificate.pem;
       
        ssl_certificate_by_lua_block {
            certificate.call()
        }

how does certificate.call() works ?

Thanks