Docker Compose: Docker Compose Sample

Install docker

sudo yum update

curl -fsSL https://get.docker.com/ | sh

sudo service docker start
sudo docker run hello-world

Install docker-compose

curl -L "https://github.com/docker/compose/releases/download/1.9.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose

docker update

• need add parameters to docker daemon

/usr/lib/systemd/system/docker.service

eg:
    docker daemon -g /mnt/docker -H fd:// -H unix:///var/run/docker.sock --cluster-store etcd://etcd.darg.ws --cluster-advertise 192.168.20.23:2375

cleanup stopped container

docker rm $(docker ps -aq)

cleanup no-used volumes

docker volume rm $(docker volume ls -q)

cleanup images

docker rmi $(docker images | grep '<none>' | awk '{print $3}')

Change Docker Dir

$dest=/mnt/docker

docker ps -q | xargs docker kill
systemctl stop docker
cd /var/lib/docker/devicemapper/mnt
umount ./*
mv /var/lib/docker $dest
ln -s $dest /var/lib/docker
systemctl start docker

Bash Completion

Linux:

curl -L https://raw.githubusercontent.com/docker/compose/$(docker-compose version --short)/contrib/completion/bash/docker-compose -o /etc/bash_completion.d/docker-compose
curl -L https://raw.githubusercontent.com/docker/docker/v$(docker version -f "{{.Server.Version}}")/contrib/completion/bash/docker -o /etc/bash_completion.d/docker

Mac:

ln -s /Applications/Docker.app/Contents/Resources/etc/docker.bash-completion /usr/local/etc/bash_completion.d/docker
ln -s /Applications/Docker.app/Contents/Resources/etc/docker-machine.bash-completion /usr/local/etc/bash_completion.d/docker-machine
ln -s /Applications/Docker.app/Contents/Resources/etc/docker-compose.bash-completion /usr/local/etc/bash_completion.d/docker-compose

curl -L https://raw.githubusercontent.com/docker/compose/$(docker-compose version --short)/contrib/completion/bash/docker-compose > /usr/local/etc/bash_completion.d/docker-compose
curl -L https://raw.githubusercontent.com/docker/docker/v$(docker version -f "{{.Server.Version}}")/contrib/completion/bash/docker > /usr/local/etc/bash_completion.d/docker

files=(docker-machine docker-machine-wrapper docker-machine-prompt)
for f in "${files[@]}"; do
  curl -L https://raw.githubusercontent.com/docker/machine/v$(docker-machine --version | tr -ds ',' ' ' | awk 'NR==1{print $(3)}')/contrib/completion/bash/$f.bash > /usr/local/etc/bash_completion.d/$f
done

Zsh Completion

curl -L https://raw.githubusercontent.com/docker/machine/v$(docker-machine --version | tr -ds ',' ' ' | awk 'NR==1{print $(3)}')/contrib/completion/zsh/_docker-machine > ~/.zsh/completion/_docker-machine
curl -L https://raw.githubusercontent.com/docker/compose/$(docker-compose version --short)/contrib/completion/zsh/_docker-compose > ~/.zsh/completion/_docker-compose
curl -L https://raw.githubusercontent.com/docker/docker/v$(docker version -f "{{.Server.Version}}")/contrib/completion/zsh/_docker > ~/.zsh/completion/_docker

Kill process in docker container tomcat

docker exec tomcat sh -c 'kill `ps -aux | grep java|grep -v grep | awk -F " " '"'"'{print $2}'"'"'`'

Backup:

Link

docker run --rm --volumes-from container-name -v $(pwd):/backup -w container-backup-dir busybox tar cvf /backup/backup.tar .

docker daemon config

sudo mkdir -p /etc/docker && \
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://XXXXXX.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

tar backup & restore

tar -cvf ~/backupportainer.tar .

tar -xvpf ~/backupportainer.tar -C /var/lib/docker/volumes

colorful bash

export PS1="[\e[37;40m\][\[\e[32;40m\]\u\[\e[37;40m\]@\h \[\e[35;40m\]\W\[\e[0m\]]"

---

Download Details:

Author: awesome-startup
Source code: https://github.com/awesome-startup/docker-compose

#docker 

What is GEEK

Buddha Community

Docker Explained: Docker Architecture | Docker Registries

Following the second video about Docker basics, in this video, I explain Docker architecture and explain the different building blocks of the docker engine; docker client, API, Docker Daemon. I also explain what a docker registry is and I finish the video with a demo explaining and illustrating how to use Docker hub

In this video lesson you will learn:

• What is Docker Host
• What is Docker Engine
• Learn about Docker Architecture
• Learn about Docker client and Docker Daemon
• Docker Hub and Registries
• Simple demo to understand using images from registries

#docker #docker hub #docker host #docker engine #docker architecture #api

Top 24 Docker Commands Explained with Examples

In my previous blog post, I have explained in detail how you can Install Docker and Docker-compose on Ubuntu

In this guide, I have explained the Top 24 Docker Commands with examples.

Make sure you have sudo or root privileges to the system.

Docker Commands

1. The command to check the version of Docker installed.
2. To look/search for available docker images from the Docker registry.
3. To pull docker images from the Docker registry.
4. Listing all the docker images
5. Creating / Running docker container from Docker image.
6. To list the actively running docker containers.
7. To list all the docker containers
8. To stop a Container
9. To start a Container
10. To restart a Docker container
11. To login to running Docker container
12. To delete the stopped Docker containers
13. To delete Docker images from the Local system
14. To check logs of a running Docker container
15. Killing docker containers
16. Log in to Docker Hub registry (hub.docker.com)
17. Removing docker hub registry login from the system.
18. Check active resource usage by each containers
19. Rename a Docker container
20. To display system wide information of Docker
21. Inspecting a Docker container
22. Building docker images from Docker file
23. Creating new docker images from a Container
24. Pushing Docker images from Local to Docker registry.

#docker #docker-command #containers #docker-compose #docker-image

Deploy a Tomcat Application Using Docker-Compose

In this blog, we will learn what is docker-compose and how we can deploy a tomcat application which uses mysql database. We will learn how we can setup a development environment using docker-compose in a single command

Prerequisite:

1. Docker and Docker-compose installed

INTRODUCTION

• Docker-compose is a tool which is used to deploy multi-container application.
• One single yaml file to deploy your application on the server.
• Best suited for the developers to setup their workstation in a single command without installing any kind of dependencies for the application
• docker-compose up to start your application
• docker-compose down to clean up all the docker containers

Let’s take an example here:

We have a project called user registration which uses mysql for storing the data . In terms of microservices, we can say that we have two services as shown below:

• Web Service
• Database Service

You can clone this git repo and try the below example

Explanation of docker-compose

1. **version : **This is the version as per the docker engine you have installed on your machine
2. **services: **This is the main tag which is used to configure multiple services and under that we have details of all the services

3. web: This is our service name -> using image, ports and volumes

4. **volumes: **To store the database files

Now we will create main docker-compose file which will together launch a tomcat, mysql and phpmyadmin container

Tomcat container — To run your application

**Database container **— To store the data

PhpMyAdmin — Access the database through GUI

So we will have three services

1. db — we are using local path to store the data so that when you run docker-compose down all your data will retain. If you use the volume then all data will get lost if you run the docker-compose down

Also, we are importing sql file so that our database is ready with the sample data. It is good so that each developer will always have the base or the actual data to run their application on the local machine

2. phpmyadmin — which is used to access the database through GUI and it depends on service db

3. web — which is used to access your web application and it also depends on service db

version: '3.3'
services:
   db:
     image: mysql:5.7
     volumes:
       - /opt/test:/var/lib/mysql
       - ./mysql-dump:/docker-entrypoint-initdb.d
     environment:
       MYSQL_ROOT_PASSWORD: root
       MYSQL_DATABASE: testdb1
       MYSQL_USER: testuser
       MYSQL_PASSWORD: root
     ports:
       - 3306:3306
phpmyadmin:
    depends_on:
      - db
    image: phpmyadmin/phpmyadmin
    ports:
      - '8081:80'
    environment:
      PMA_HOST: db
      MYSQL_ROOT_PASSWORD: root
web:
    depends_on:
      - db
    image: tomcat
    volumes:
      - ./target/LoginWebApp-1.war:/usr/local/tomcat/webapps/LoginWebApp-1.war
    ports:
      - '8082:8080'
    environment:
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: testdb1
      MYSQL_USER: testuser
      MYSQL_PASSWORD: root

#docker-compose #docker-image #docker

Cómo instalar Drupal con Docker Compose

Введение

Docker позволяет легко помещать приложения и службы в контейнеры, чтобы их можно было запускать где угодно. Однако при работе с Docker можно легко накопить чрезмерное количество неиспользуемых образов, контейнеров и томов данных, замедляющих работу и потребляющих место на диске.

Docker предоставляет все необходимые инструменты для очистки системы из командной строки. В этом руководстве с полезными советами кратко описываются полезные команды для освобождения места на диске и организации системы посредством удаления неиспользуемых образов, контейнеров и томов Docker.

Использование этого руководства:

• Это руководство в формате полезных советов содержит автономные сниппеты для командной строки
• Вы можете перейти к любому разделу, актуальному для задачи, которую вы пытаетесь выполнить.

Синтаксис замены команды command $(``command``), используемый в командах, доступен во многих популярных оболочках, включая bash, zsh и Windows Powershell.

Очистка всех неиспользуемых или не связанных с контейнерами образов, контейнеров, томов и сетей

В Docker имеется команда, очищающая все не связанные с контейнерами ресурсы, в том числе образы, контейнеры, тома и сети:

docker system prune

Чтобы удалить все остановленные контейнеры и неиспользуемые образы (а не только образы, не связанные с контейнерами), добавьте в эту команду флаг -a:

docker system prune -a

Удаление образов Docker

Удаление одного или нескольких конкретных образов

Используйте команду docker images с флагом -a, чтобы найти идентификатор удаляемых образов. Эта команда покажет вам все образы, включая промежуточные слои образов. Когда вы определитесь с составом удаляемых образов, вы можете передать их идентификаторы или теги в docker rmi:

Список:

docker images -a

Удаление:

docker rmi Image Image

Удаление образов, не привязанных к контейнеру

Образы Docker состоят из нескольких слоев. Несвязанные образы — это слои, не имеющие связей с каким-либо образами с тегами. У них нет никакого назначения, и они просто занимают место на диске. Их можно найти, добавив флаг фильтра -f со значением dangling=true в команду docker images. Если вы уверены, что хотите удалить их, вы можете использовать команду docker images purge:

#drupal #docker #docker compose #docker images

Volume Management, Compose v2, Skipping Updates, and more in Docker Desktop 3.4

We are excited to announce the release of Docker Desktop 3.4.

This release includes several improvements to Docker Desktop, including our new Volume Management interface, the Compose v2 roll-out, and changes to how to Skip an update to Docker Desktop based on your feedback.

Volume Management

Have you wanted a way to more easily manage and explore your volumes?

In this release we’re introducing a new capability in Docker Desktop that helps you to create and delete volumes from Desktop’s Dashboard as well as to see which ones are In Use.

#products #docker #docker compose #docker desktop