id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1744	Cannot use custom variable in ssl_certificate directive.	Antiarchitect@…		"Nginx: nginx:1.15.9-alpine

Part of the config:

server {
...
set $cert_name my.example.com;

ssl_certificate ""letsencrypt/live/${cert_name}/fullchain.pem"";
...
}

In logs:
""2019/03/12 19:51:20 [error] 6#6: *25 cannot load certificate \""/etc/nginx/letsencrypt/live//fullchain.pem\"": BIO_new_file() failed (SSL: error:0200100D:system library:fopen:Permission denied:fopen('/etc/nginx/letsencrypt/live//fullchain.pem','r') error:2006D002:BIO routines:BIO_new_file:system lib) while SSL handshaking, client: 10.0.1.135, server: 0.0.0.0:443""

* Permission denied is because I haven't run nginx as root in docker container and letsencrypt files were readable only by 0 uid.

When using built-in $ssl_server_name variable - all is ok and path is set properly."	defect	closed	minor		other	1.15.x	invalid			Linux a371d0a1c462 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 x86_64 Linux	"nginx version: nginx/1.15.9
built by gcc 8.2.0 (Alpine 8.2.0) 
built with OpenSSL 1.1.1a  20 Nov 2018
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-http_ssl_module --with-http_realip_module --with-http_addition_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_stub_status_module --with-http_auth_request_module --with-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_geoip_module=dynamic --with-threads --with-stream --with-stream_ssl_module --with-stream_ssl_preread_module --with-stream_realip_module --with-stream_geoip_module=dynamic --with-http_slice_module --with-mail --with-mail_ssl_module --with-compat --with-file-aio --with-http_v2_module"