Docker

In this episode I answer a viewer’s question if you can use Docker Compose Watch without a Dockerfile. Actually, it’s more me checking if they are correct. Spoiler alert, they are correct and you can’t use Docker Compose Watch without a Dockerfile. You will get an error message: “can’t watch service [service-name] without a build context”.

Previous video about Docker Compose Watch:

In this stunning conclusion to the 3 part series I finally get HTTP Basic Authentication working. Including merging my changes into the main branch in GitLab and making sure it works in staging and production in Render. The video is so long because I made dumb mistake 10 minutes in.

Spoiler: When using the Passenger Docker image it’s really important you don’t delete:

RUN rm -f /etc/service/nginx/down

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In this episode I get the Basic Authentication NGINX configuration working using the envsubst tool to replace environment variables in the config file. Ran out of time to test the fix in actual staging. That will hopefully be done in the 3rd part of this series.

Watch the previous video in the series:

In this episode I explain and then start to add HTTP Basic Authentication to the Saturday MP website which is a Ruby on Rails application hosted on a Passenger Docker image. As usual I ran into some trouble and at the end of the video figured out I should use the envsubst command to dynamically set the Basic Auth, and other values, in the NGINX config.

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In this episode I try out the new Docker Compose Watch developer feature that synchronizes files on the host and the container. Similar to Docker Volumes. It won’t replace Docker Volumes for for me, at least not yet. Are you using, or thinking about using, Watch?

I did encounter a known bug where Docker Watch won’t run again after a Ctrl-C stop. You can find a workaround for the issue here.