Docker Basic Setup

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Dock­er In­stal­la­tion Steps

This sec­tion we gives fresh (Feb. 2023) ref­er­ences how to in­stall Dock­er and Dock­er Com­pose plu­g­in v.2.x on Ubun­tu.

• Dock­er Docs: In­stall Dock­er En­gine on Ubun­tu >> Unin­stall old ver­sions >> In­stall us­ing the repos­i­to­ry
• Dock­er Docs: In­stall the Com­pose plu­g­in >> In­stall us­ing the repos­i­to­ry
• LinuxServer​.io Docs: As an ad­di­tion­al Dock­er us­age ref­er­ence and source of plen­ty of im­ages

Dep­re­cat­ed Dock­er In­stal­la­tion Steps

#Dep­re­cat­ed In­stal­la­tion Steps

In­stall Dock­er

In­stall Dock­er on Ubun­tu and oth­er De­bian based dis­tros.

sudo apt install docker.io curl

sudo usermod -aG docker "$USER"

Ref­er­ences:

• Stack Over­flow: What is docker​.io in re­la­tion to dock­er-ce and dock­er-ee (now called "Mi­ran­tis Ku­ber­netes En­gine")?
• Collabora​.com: The docker​.io De­bian pack­age is back to life

In­stall Dock­er Com­pose

More in­for­ma­tion at Get start­ed with Dock­er Com­pose.

# docker-compose from github.com/docker/compose#where-to-get-docker-compose

sudo curl -L --fail \
https://github.com/docker/compose/releases/download/v2.5.0/docker-compose-linux-x86_64 \
-o /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

Al­ter­na­tive­ly, for ex­am­ple, one can use Dock­er-com­pose pro­vid­ed by Linuxserver​.io.

#CLI

# docker-compose from linuxserver.io

sudo curl -L --fail \
https://raw.githubusercontent.com/linuxserver/docker-docker-compose/master/run.sh \
-o /usr/local/bin/docker-compose && \
sudo chmod +x /usr/local/bin/docker-compose

Ba­sics Ex­am­ple

Here is a GitHub repos­i­to­ry that il­lus­trates at very ba­sic lev­el how to use Dock­er­file and docler-compose.yaml to de­ploy a Node.js ap­pli­ca­tion.

• GitHub: Sim­ple task man­ag­er
• GitHub: Sim­ple task man­ag­er#CLI​.md

Mis­cel­la­neous

Prune All

Sim­ple script that will prune all Dock­er con­tain­ers and im­ages that are not in use. If you want to use it, add the script some­where in your $PATH to be ac­ces­si­ble as shell com­mand and make it ex­e­cutable.

sudo nano /usr/local/bin/docker-prune.sh && sudo chmod +x /usr/local/bin/docker-prune.sh

#!/bin/bash
docker image prune -a
docker container prune
docker images prune
docker system prune

docker volume rm $(docker volume ls -qf dangling=true)

• Stack Over­flow: Why is dock­er im­age eat­ing up my disk space that is not used by dock­er

Force up­date ex­ist­ing im­ages with dock­er-com­pose

docker-compose up --force-recreate --build -d
docker image prune -f

• Stack Over­flow: How to up­date ex­ist­ing im­ages with dock­er-com­pose?

Log-in to a Dock­er Con­tain­er

docker exec -it container(id|name) /bin/bash

Gen­er­ate Hashed Pass­word for Code-serv­er

printf 'your-password' | npx argon2-cli -e | sed 's/\$/$$/g'

• Code-serv­er GitHub: FAQ – Can I store my pass­word hashed?

De­mo App from Nana's Dock­er Tu­to­r­i­al for Be­gin­ners

• Tech­World with Nana: Dock­er Tu­to­r­i­al for Be­gin­ners [FULL COURSE in 3 Hours] (Dock­er Tu­to­r­i­al for Be­gin­ners)
• Git­Lab of Nana: tech­world-js-dock­er-de­mo-app

See al­so

• File: Us­ing Por­tain­er with Dock­er and Dock­er Com­pose – Earth­ly Blog.pdf

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