55 lines
1.1 KiB
Markdown
55 lines
1.1 KiB
Markdown
## Containerize an Application
|
|
|
|
1. Clone an open source project you would like to containerize. A couple of suggestions:
|
|
|
|
```
|
|
https://github.com/bregman-arie/node-hello-world
|
|
https://github.com/bregman-arie/flask-hello-world
|
|
```
|
|
|
|
`git clone https://github.com/bregman-arie/node-hello-world`
|
|
|
|
2. Write a Dockerfile you'll use for building an image of the application (you can use any base image you would like)
|
|
|
|
```
|
|
FROM alpine
|
|
LABEL maintainer="your name/email"
|
|
RUN apk add --update nodejs npm
|
|
COPY . /src
|
|
WORKDIR /src
|
|
RUN npm install
|
|
EXPOSE 3000
|
|
ENTRYPOINT ["node", "./app.js"]
|
|
```
|
|
|
|
3. Build an image using the Dockerfile you've just wrote
|
|
|
|
`docker image build -t web_app:latest .`
|
|
|
|
4. Verify the image exists
|
|
|
|
`docker image ls`
|
|
|
|
5. [Optional] Push the image you've just built to a registry
|
|
|
|
```
|
|
docker login
|
|
docker image tag web_app:latest <your username>/web_app:latest
|
|
# Verify with "docker image ls"
|
|
docker image push <your username>/web_app:latest
|
|
```
|
|
|
|
6. Run the application
|
|
|
|
```
|
|
docker container run -d -p 80:3000 web_app:latest
|
|
```
|
|
|
|
7. Verify the app is running
|
|
|
|
```
|
|
docker container ls
|
|
docker logs <container ID/name>
|
|
# In the browser, go to 127.0.0.1:80
|
|
```
|