I want to install gitlab in my nginx server.
I follow this instruction for the install.

gitlab-ctl reconfigure give me :

There was an error running gitlab-ctl reconfigure:

letsencrypt_certificate[gitlab.domain.dev] (letsencrypt::http_authorization line 5) had an error: RuntimeError: acme_certificate[staging] (/opt/gitlab/embedded/cookbooks/cache/cookbooks/letsencrypt/resources/certificate.rb line 25) had an error: RuntimeError: ruby_block[create certificate for gitlab.domain.dev] (/opt/gitlab/embedded/cookbooks/cache/cookbooks/acme/resources/certificate.rb line 108) had an error: RuntimeError: [gitlab.domain.dev] Validation failed, unable to request certificate

I use :

• Debian 8
• Nginx
• My firewall allow 443 & 80 (i have one site in http foo.com and one in https domain.dev)
• I have access to sudo (or root)
• apt install ca-certificates curl openssh-server postfix

I try :

• Create subdomaine gitlab.domain.dev in my dns
• Create SSL cert. for this domain with certbot
• At this step the subdomain is ok
• Install gitlab whit EXTERNAL_URL="https://gitlab.domain.dev" apt-get install gitlab-ee
• At this step gitlab.domain.dev return nothing
• I test to edit the config file (nano /etc/gitlab/gitlab.rb) like this :

nginx['ssl_certificate'] = "/etc/letsencrypt/live/gitlab.domain.dev/fullchain.pem"
nginx['ssl_certificate_key'] = "/etc/letsencrypt/live/gitlab.domain.dev/privkey.pem"

• and run gitlab-ctl reconfigure
• and catch the error
• i try this too

I don’t understand why i said to tell gitlab to use my ssl certificates already created and how to make my subdomain give gitlab.

My nginx subdomain conf file :

# the nginx server instance
server {

    server_name gitlab.domain.dev;
    root /var/www/gitlab.domain.dev;
    index index.html index.htm index.nginx-debian.html;

    access_log /var/log/nginx/gitlab.domain.dev.log;
    location / {
            try_files $uri $uri/ =404;
    }

    listen [::]:443 ssl; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/gitlab.domain.dev/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/gitlab.domain.dev/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

server {
    if ($host = gitlab.domain.dev) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    listen [::]:80;

    server_name gitlab.domain.dev;
    return 404; # managed by Certbot


}

update 1

I try :

• convert .pem file to .key and .crt whit :

openssl x509 -outform der -in your-cert.pem -out your-cert.crt
openssl pkey -in privkey.pem -out foo.key

• change value of gitlab config file nano /etc/gitlab/gitlab.rb to :

web_server['external_users'] = ['www-data']
nginx['enable'] = false
nginx['redirect_http_to_https'] = true
nginx['redirect_http_to_https_port'] = 80
nginx['ssl_certificate'] = "/etc/gitlab/ssl/gitlab.domain.dev.crt"
nginx['ssl_certificate_key'] = "/etc/gitlab/ssl/gitlab.domain.dev.key"

• nginx subdomain conf file :

# the nginx server instance
server {

    server_name gitlab.domain.dev;
    root /opt/gitlab/embedded/service/gitlab-rails/public;
    index index.html index.htm index.nginx-debian.html;

    access_log /var/log/nginx/gitlab.domain.dev.log;
    location / {
            try_files $uri $uri/ =404;
    }

    ## listen [::]:443 ssl; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/gitlab.domain.dev/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/gitlab.domain.dev/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

server {
    if ($host = gitlab.domain.dev) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    ## listen [::]:80;

    server_name gitlab.domain.dev;
    return 404; # managed by Certbot


}

• reconfigure :

Running handlers:
Running handlers complete
Chef Client finished, 7/651 resources updated in 18 seconds
gitlab Reconfigured!

But https://gitlab.domain.dev/ give http 403…

Any help is welcome, thanks.