CODEWITHSUNDEEP
dockerdocker-compose
Hans
Hans

Reputation: 2910

Commands in Dockerfile and commands in docker-compose

I'm using the jonasal/nginx-certbot:latest to run several services under NGINX with automatic certificate generation.

I now want to create a second instance for UAT testing where all domains shift from [subdomain].domain.com to [subdomain]-uat.domain.com. To enable this I have substituted the domains by environment variables and used the following command in the docker-compose.yaml file:

    command: /bin/bash -c "envsubst < /etc/nginx/user_conf.d/ssl-server.conf.template > /etc/nginx/user_conf.d/ssl-server.conf && nginx -g 'daemon off;'

This produces the correct ssl_server.conf file but does not seem to start the certbot process.

I'm trying to figure out if using a command in the docker-compose.yaml overrules the RUN command in the Dockerfile but cannot find anything to say that.

I'm also trying to trigger the run command from within the docker-compose.yaml file like.

    command: /bin/bash -c "envsubst < /etc/nginx/user_conf.d/ssl-server.conf.template > /etc/nginx/user_conf.d/ssl-server.conf && nginx -g 'daemon off;' && /scripts/start_nginx_certbot.sh"

But this does not make a difference.

What am I missing?

Upvotes: 1

Views: 228

Answers (1)

Hans Kilian
Hans Kilian

Reputation: 25389

Your command overrides the command in the image, so you need to run the startup script yourself as you show in your last command.

I think your error in that is that you also run nginx. When you do it that way, your 'base' nginx starts and since it doesn't exit, the normal startup script is never run. Try this

command: /bin/bash -c "envsubst < /etc/nginx/user_conf.d/ssl-server.conf.template > /etc/nginx/user_conf.d/ssl-server.conf && /scripts/start_nginx_certbot.sh"

Upvotes: 1

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