My Docker Cheat Sheet

UpdatedOctober 20, 2023

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Dennis Schmidt

Software Engineer at BMW, Oracle Certified Professional Java SE 11 Developer

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Welcome to my corner of the web

17 posts

1. Docker file template with MySQL and adminer

In your root directory, create following files

.
├── scripts/
│   ├── schema.sql
│   ├── data.sql
│   └── mycustom.cnf
└── docker-compose.yml

Edit yourdocker-compose.yml as follows

version: "3.8"
services:
db:
 image: mysql:8.0.33
 container_name: mysql8.0.33
 restart: always
 environment:
   MYSQL_ROOT_PASSWORD: secret
   MYSQL_DATABASE: playground
 volumes:
   - "./scripts/schema.sql:/docker-entrypoint-initdb.d/1.sql"
   - "./scripts/data.sql:/docker-entrypoint-initdb.d/2.sql"
   - "./scripts/mycustom.cnf:/etc/mysql/conf.d/custom.cnf"
 ports:
   - 3306:3306

adminer:
 image: adminer
 restart: always
 ports:
   - 8080:8080

You can add your initial database schema in scripts/schema.sql

CREATE TABLE `test` (
`id` int unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(32) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;

You can add your initial data in scripts/data.sql

INSERT INTO test (name)
VALUES ("Dennis");

Run your docker file with docker-compose

docker-compose up

Open your browser at localhost:8080, login to your MySQL instance and have fun.

2. Exploring the docker filesystem

docker exec -t -i <container_name> /bin/bash

-t (terminal): This option allows you to interact with the container using a terminal-like interface. It is commonly used when you need to run interactive commands inside the container, such as an interactive shell session.
-i (interactive): This option enables you to provide input to the command running inside the container.

5. Publish docker image to Docker Hub

When you login to your Docker Hub, you will see the default command how to push a image to your docker hub. For example

docker push dcnis/popup-chinese-backend-quarkus:tagname

If you would execute this command locally, you will probably get an error which says docker cannot find the image with the tag dcnis/popup-chinese-backend-quarkus. So first we have to create a new tag.

List docker images

docker images
quarkus/popup-chinese-backend-quarkus

We can see we have one images with the name quarkus/popup-chinese-backend-quarkus. Based on this image, we create the new tag.

Create a new tag from your existing docker image.

docker tag quarkus/popup-chinese-backend-quarkus dcnis/popup-chinese-backend-quarkus

Check the images

docker images
quarkus/popup-chinese-backend-quarkus                 latest
dcnis/popup-chinese-backend-quarkus                 latest

Push the image

% docker push dcnis/popup-chinese-backend-quarkus
Using default tag: latest
The push refers to repository [docker.io/dcnis/popup-chinese-backend-quarkus]
48efe9a978d6: Pushed 
5f77935eec15: Pushed 
3b6ba2682483: Pushed 
129f98c51b7a: Pushed 
41c90dc5a18e: Pushed 
5f70bf18a086: Pushed 
5282f3464e78: Pushed 
latest: digest: sha256:0baf3b80fdc4ea7fd73f199f88d8c91099e3191ca8705dd0e79d68dd67013d01 size: 1780

Continuous workflow: To speed up your development process, you can create the image directly with the correct name and then push the new image to Docker Hub.

% docker build -f src/main/docker/Dockerfile.native-micro -t dcnis/popup-chinese-backend-quarkus .
% docker push dcnis/popup-chinese-backend-quarkus

My Docker Cheat Sheet

Comments

More from this blog

Keycloak: Failed to verify identity token: Invalid token issuer

My Bash Scripting Cheat Sheet

My PostgreSQL Cheat Sheet

My macOS Cheat Sheet

My Open Source Cheat Sheet

1. Docker file template with MySQL and adminer

2. Exploring the docker filesystem

3. Connect to mysql via command line

4. Copy a file from docker container to host machine

5. Publish docker image to Docker Hub

6. Spin up PostgreSQL Database with Docker

Command Palette

Comments

More from this blog

1. Docker file template with MySQL and adminer

2. Exploring the docker filesystem

3. Connect to mysql via command line

4. Copy a file from docker container to host machine

5. Publish docker image to Docker Hub

6. Spin up PostgreSQL Database with Docker