This project has some basic examples with docker. The purpose is to be a personal reference for me but I am sharing this because I think can be useful for someone. To run those examples be sure to run commands inside each directory.
- Example 1: A basic Dockerfile
- Example 2: Passing arguments for container
- Example 3: (Removed)
- Example 4: Running containers and copy files for it
- Example 5: Running an container as a simple python server
- Example 6: A AMPP environment using docker-compose
- Example 7: Simple docker-compose example
- Example 8: Postgres and PGAdmin4 Example
In this example we download a simple image of nginx server and start the container runing a simple comand to echo 'hello'.
docker image build -t ex-simple-build
run docker image ls
Take a look on the image. Now lets start it:
docker container run -p 80:80 ex-simple-build
In this example we download a debian image and start a simple container with. In Dockerfile we have declared some variables that can be assigned with a docker command.
docker image build -t ex-build-arg .
docker container run ex-build-arg bash -c 'echo $S3_BUCKET'
The 'file' value will be showed because we dont build the image saying his value. Now we can see:
docker image build --build-arg S3_BUCKET=myapp . -t ex-build-arg .
docker container run ex-build-arg bash -c 'echo $S3_BUCKET'
In this example we create a file a html file and make a copy of it to inside of our nginx container. After run, we can see the html content in localhost. Please take a look inside of Dockerfile.
docker image build -t ex-build-copy .
docker container run -p 80:80 ex-build-copy
This is a little more complex example. In the example's folder we have a .py script that represents a server. The Dockerfile will download and run a image and start the server. After that we can see the result accessing localhost.
docker image build -t 5-build-dev-example .
docker container run -it -v $(pwd):/app -p 80:8000 --name python-server 5-build-dev-example
Also, after this, we can push our image to dockerhub.
Before all, tag your image:
docker image tag 5-build-dev-example YOUR_USER/YOUR-BUILD:VERSION
- Make login on dockerhub:
docker login --YOUR_LOGIN - Enter your password
- After login succeeded, push the image:
docker image push YOUR_LOGIN/YOUR-BUILD
First, you need to download docker-compose (for Ubuntu, read this: https://linuxize.com/post/how-to-install-and-use-docker-compose-on-ubuntu-18-04/).
Inside the example's folder we have 2 subfolders: -apache has a Dockerfile to the Apache, needed to PHP; -php has a Dockerfile to the PHP also;
Others stuffs are inside docker-compose.yml, like mysql and phpmyadmin image descriptions and configuration.
To run it, just type this command:
docker-compose up
In this example we create a docker-compose.yml and configure three items: backend, frontend and database. The backend has app.js to proccess requests and frontend just show a simple string on screen.
To run it, just type this command:
docker-compose up
The docker-compose.yml content declare two services, an postgres (latest) database and an pgadmin4 (latest). Take a look inside users and passwords and customize as you want. I don't know why, but when declare the postgres:9.6 I was unable to connect with pgadmin. If you know why, please give-me a tip :)