docker-nginx

Preface

There are many Docker images for nginx.

This article packages a business nginx into a Docker image.

Choosing the nginx Version

alpine

Alpine is a minimal Linux distribution, with an image size of only 7.73M.

nginx also has an alpine-based version.

This article uses the alpine-based version.

stable

nginx has stable and latest versions. Here we choose the stable version.

slim

After choosing nginx-stable-alpine, there are still slim and perl variants.

Here we choose slim, the minimal variant.

The final version is: nginx:stable-alpine-slim

Dockerfile

The final Dockerfile is as follows:

Use the nginx version above
Remove the default startup scripts from the image
Copy your business nginx folder to /etc/nginx

FROM nginx:stable-alpine-slim

RUN rm -rf /docker-entrypoint.d
RUN rm -rf /etc/nginx
COPY ./nginx /etc/nginx
WORKDIR /etc/nginx

CMD ["nginx", "-g", "daemon off;"]
EXPOSE 80

Adapting for Docker

Migrating from a server-based nginx to a Docker nginx requires a few changes.

Docker run command

Note that you need to map both port 80 and port 443.

docker run -d -p 80:80 -p 443:443 --cpus="2" --memory="200m" --restart="always" --name="insistime-nginx" registry.cn-beijing.aliyuncs.com/insistime/insistime-nginx:$version

Update IP addresses

Change all local IPs in your nginx configs,

such as localhost or 127.0.0.1,

to the server’s internal IP.

Update paths

Update log paths to /var/log/nginx.

Update SSL certificate paths to ensure they are accessible inside the container.