Docker on Debian

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Let’s Setup Docker on Debian

Get Debian on some Cloud Provider

Update Apt

apt-get install ca-certificates curl gnupg lsb-release

add official GPG Keys

mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg |gpg --dearmor -o /etc/apt/keyrings/docker.gpg

add Repo to Sources

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
  $(lsb_release -cs) stable" |tee /etc/apt/sources.list.d/docker.list > /dev/null

install Docker Engine

apt-get update
apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

Check Version

docker version

root@docker:~# docker version
Client: Docker Engine - Community
 Version:           20.10.18
 API version:       1.41
 Go version:        go1.18.6
 Git commit:        b40c2f6
 Built:             Thu Sep  8 23:12:08 2022
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Docker Compose Version

docker compose version

root@docker:~# docker compose version
Docker Compose version v2.10.2

Install Hello World

docker run hello-world

Prepare Folders

mkdir -p /etc/docker/container/traefik
cd /etc/docker/container/traefik

Build Docker-compose

cat << 'EOF' > docker-compose.yml
services:
  traefik:
    image: traefik:v2.6
    restart: always
    command:
      - "--providers.docker"
      - "--providers.docker.exposedByDefault=false"
      - "--providers.docker.network=traefik_web"
      - "--entrypoints.http.address=:80"
      - "--entrypoints.http.http.redirections.entrypoint.to=https"
      - "--entrypoints.http.http.redirections.entrypoint.scheme=https"
      - "--entrypoints.https.address=:443"
      - "--entrypoints.https.http.tls.certResolver=le"
      - "--certificatesresolvers.le.acme.tlschallenge=true"
      - "[email protected]"
      - "--certificatesresolvers.le.acme.storage=/letsencrypt/acme.json"
    ports:
      - "80:80"
      - "443:443"
      - "8080:8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./letsencrypt:/letsencrypt
networks:
  web:
    name: traefik_web
EOF

docker compose up

docker compose up -d

docker compose ps

docker compose ps

NAME                COMMAND                  SERVICE             STATUS              PORTS
traefik-traefik-1   "/entrypoint.sh --pr…"   traefik             running             0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:443->443/tcp, :::443->443/tcp, 0.0.0.0:8080->8080/tcp, :::8080->8080/tcp

Demo Nginx

mkdir -p /etc/docker/container/nginx-demo
cd /etc/docker/container/nginx-demo

docker-compose.yml

cat << 'EOF' > docker-compose.yml
services:
  nginx:
    image: nginx:1.20
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.nginx.rule=Host(`nginx.v4.docker.noflow.ch`)"
    networks:
      - traefik_web

networks:
  traefik_web:
    external: true
EOF

Nginx up

docker compose up -d

Tail logfile

docker compose logs -f

-> https://nginx.v4.docker.noflow.ch

NOTES: had some troubles as the Server is DualStacked and the FQDN got resolved to IPv4 and IPv6. So, Let’s Encrypt tried to reached the Server via IPv4 and IPv6 and could not reach Traefik via IPv6. Hence, le was not providing a Certificate.

apache container

cat << 'EOF' > docker-compose.yml
services:
  apache:
    image: php:8.1-apache
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.apache.rule=Host=(`apache.v4.docker.noflow.ch`)"
    networks:
      - traefik_web
    volumes:
      - ./html:/var/www/html

networks:
  traefik_web:
    external: true
EOF

mkdir html
echo '<?php phpinfo(); ?>' > html/index.php

-> https://apache.v4.docker.noflow.ch

Any Comments ?

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