Use perl module to read environment variables. If you google for Nginx docker and environment variables you’ll end up with envsubst workaround to pass environment variables.
If you google for Nginx docker and environment variables you’ll end up with *envsubst *workaround to pass environment variables to the docker container. Although that workaround works, it’s not that flexible and easy to operate.
I like alpine-based images because they are light-weight and secure. You might wonder why I’m using Perl *enabled image, the answer is short: To be able to read environment variables in Nginx, the
nginx-mod-http-perl module is needed and that runs on *Perl!
FROM nginx:1.18.0-alpine-perl RUN apk add --no-cache nginx-mod-http-perl COPY nginx.conf /etc/nginx/nginx.conf COPY default.conf /etc/nginx/conf.d/default.conf EXPOSE 80/tcp EXPOSE 443/tcp CMD ["/bin/sh", "-c", "exec nginx -g 'daemon off;';"] WORKDIR /usr/share/nginx/html
The Nginx main configuration file is
nginx.conf and that is located in
/etc/nginx/nginx.conf . We use this file to load Nginx modules and configure the enviroment variables.
To load the module, simply use following line of code:
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