Docker
Docker ist eine freie Software zur Isolierung von Anwendungen mit Hilfe von Containervirtualisierung. Docker vereinfacht die Bereitstellung von Anwendungen, weil sich Container, die alle nötigen Pakete enthalten, leicht als Dateien transportieren und installieren lassen

Installation Docker
Einleitung
In diesem Artikel zeigen wir den Ablauf einer Docker CE (Community Edition) Installation auf einem Debian basierenden Linux auf. Diese Dokumentation zeigt eine vereinfachte Installation auf und sollte bei produktiven Server individuell überdacht werden.
Installation mit apt
Bevor wir die Docker Engine auf dem System installieren können. Müssen wir sicherstellen, dass wir die Repository aktualisieren, denn Docker ist in der allgemeinen Repo nicht enthalten.
1. Einrichtung der Docker Repository
Hinzufügen von Docker's offiziellem GNU-Privatsphärenschutz:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc
Hinzfügen der Docker Repository:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
2. Installation der Docker Pakete Einrichtung der Docker Repository
Aktuelle Version
Um die aktuellste Version zu installieren, führe folgenden Befehl aus:
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
Spezifische Version
# List the available versions:
apt-cache madison docker-ce | awk '{ print $3 }'
5:27.0.3-1~debian.12~bookworm
5:27.0.2-1~debian.12~bookworm
...
Packetinstallation
Installation mittels Packet
Skript Installation

Docker Container

Dockge
How to Install
Requirements:
Docker 20+ / Podman
(Podman only) podman-docker (Debian: apt install podman-docker)
OS:
Major Linux distros that can run Docker/Podman such as:
✅ Ubuntu
✅ Debian (Bullseye or newer)
✅ Raspbian (Bullseye or newer)
✅ CentOS
✅ Fedora
✅ ArchLinux
❌ Debian/Raspbian Buster or lower is not supported
❌ Windows (Will be supported later)
Arch: armv7, arm64, amd64 (a.k.a x86_64)
Basic
Default Stacks Directory: /opt/stacks
Default Port: 5001
Create directories that store your stacks and stores Dockge's stack
mkdir -p /opt/stacks /opt/dockge
cd /opt/dockge
Download the compose.yaml
curl https://raw.githubusercontent.com/louislam/dockge/master/compose.yaml --output compose.yaml
Start the server
docker compose up -d
If you are using docker-compose V1 or Podman
docker-compose up -d
Dockge is now running on http://localhost:5001
Advanced
If you want to store your stacks in another directory, you can generate your compose.yaml file by using the following URL with custom query strings.
Download your compose.yaml
curl "https://dockge.kuma.pet/compose.yaml?port=5001&stacksPath=/opt/stacks" --output compose.yaml
port=5001
stacksPath=/opt/stacks
Interactive compose.yaml generator is available on: https://dockge.kuma.pet
How to Update
cd /opt/dockge
docker compose pull && docker compose up -d

Zammad
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sdfsddfdsfdsfdsf
Systemvorrausetzungen
Docker Compose muss auf dem System installiert werden
4GB RAM
Systemeinstellungen müssen wie folgt angepasst werden
sysctl -w vm.max_map_count=262144
Installation mit Docker Compose
GitHub Repo klonen
git clone https://github.com/zammad/zammad-docker-compose.git
Adjust Environment as Needed
In some cases our default environment is not what a docker-compose user is looking for. See Docker Environment Variables for details on which settings can be configured.
If you want to use a 
.env file, you can use the provided 
.env.dist file and copy it to 
.env. That way it will be picked up by Docker-Compose automatically and not overwritten during updates.
Zammad runs on port 
8080 by default. If you want to use another port, you can set it via the variable 
NGINX_EXPOSE_PORT.
 

Portainer
Portainer Community Edition (CE)
Installation
docker run -d -p 8000:8000 -p 9443:9443 --name portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce
Update
Stop Docker Container
docker stop portainer
Remove Docker Container
docker rm portainer
Update Docker Image
docker pull portainer/portainer-ce

UniFi Network Application
docker-compose.yaml
services:
  # Define the services to run
  db:
    image: mongo
    volumes:
      - ./db:/data/db # MongoDB data persistence
      - ./db/init-mongo.js:/docker-entrypoint-initdb.d/init-mongo.js:ro
    ports:
      - 27017:27017 # MongoDB default port
    restart: always # Restart policy
    networks:
      backend: null
  app:
    image: lscr.io/linuxserver/unifi-network-application # Docker image to use
    environment:
      # Environmental variables for the container
      - PUID=1000 # User ID
      - PGID=1000 # Group ID
      - TZ=Europe/Zurich # Timezone
      - MONGO_HOST=db # MongoDB host
      - MONGO_USER= ${DB_USER} # MongoDB username
      - MONGO_PASS= ${DB_PW} # MongoDB password
      - MONGO_PORT=27017 # MongoDB port
      - MONGO_DBNAME= ${DB_NAME} # MongoDB database name
      - MEM_LIMIT=1024 #optional  # Memory limit for the container
      - MEM_STARTUP=1024 #optional  # Memory to allocate on container startup
    volumes:
      # Volumes to mount in the container
      - ./web:/config # Map host directory to container directory
    ports:
      # Ports to expose and forward
      - 8443:8443 # HTTPS portal
      - 3478:3478/udp # STUN service
      - 10001:10001/udp # UniFi AP discovery
      - 8080:8080 # HTTP portal
      - 6789:6789 #optional  # Mobile speed test port
      - 161:161/udp #SNMP
    restart: always # Restart policy for the container
    depends_on:
      - db
    networks:
      frontend: null
      backend: null
networks:
  frontend: null
  backend: null
.env
DB_USER=unifi
DB_PW=password
DB_NAME=unifi_db
init-mongo.js
db.getSiblingDB("unifi_db").createUser({user: "unifi", pwd: "password", roles: [{role: "dbOwner", db: "unifi_db"}]});
db.getSiblingDB("unifi_db_stat").createUser({user: "unifi", pwd: "password", roles: [{role: "dbOwner", db: "unifi_db_stat"}]});

Admin Passwort zurücksetzen
You would typically use this method if you run the Portainer Server on Docker Standalone.
First, go to our reset password container helper in GitHub, then stop the Portainer container by running this command:
docker stop "id-portainer-container"
Next, run the helper using the following command (you'll need to mount the Portainer data volume):
If your Portainer data volume has a different name than 
portainer_data or you are using a bind mount for your data volume, you will need to adjust the mount in the below 
docker run command to suit your path.
 
docker pull portainer/helper-reset-password
docker run --rm -v portainer_data:/data portainer/helper-reset-password
If successful, the output should look like this:
2020/06/04 00:13:58 Password successfully updated for user: admin
2020/06/04 00:13:58 Use the following password to login: &_4#\3^5V8vLTd)E"NWiJBs26G*9HPl1
If the helper is unable to find an admin user to update, it will create a new one for you. If the username 
admin is already used, it will create a user named 
admin-[randomstring]:
2022/08/10 07:36:33 [WARN] Unable to retrieve user with ID 1, will try to create, err: object not found inside the database
2022/08/10 07:36:33 Admin user admin-u0512b3f0v4dqk7o successfully created
2022/08/10 07:36:33 Use the following password to login: Sr#]YL_6D0k8Pd{pA9^|}F32j5J4I=av
Finally, use this command to start the Portainer container then try logging in with the new password:

Portainer per Docker Compose bereitstellen
Portainer Agent
services:
  app:
    container_name: portainer-agent #Name kann beliebig angepasst werden
    image: portainer/agent:lts #LTS Version
    ports:
      - "9001:9001" 
    volumes:
      # Mount the host's Docker socket into the container
      - /var/run/docker.sock:/var/run/docker.sock
      # Mount the host's Docker volumes into the container
      - /var/lib/docker/volumes:/var/lib/docker/volumes
    restart: always
    network_mode: bridge
    deploy:
      resources:
        limits:
          cpus: '0.5'
          memory: 512M

Knowledge Base
Aktive technische Knowledge-Base-Einträge aus Obsidian.

Remove Docker
Remove Docker
To completely uninstall Docker:
Step 1
dpkg -l | grep -i docker
To identify what installed package you have:
Step 2
sudo apt-get purge -y docker-engine docker docker.io docker-ce docker-ce-cli docker-compose-plugin containerd.io docker-buildx-plugin
sudo apt-get autoremove -y --purge docker-engine docker docker.io docker-ce docker-compose-plugin containerd.io docker-buildx-plugin
The above commands will not remove images, containers, volumes, or user created configuration files on your host. If you wish to delete all images, containers, and volumes run the following commands:
sudo rm -rf /var/lib/docker /etc/docker
sudo rm /etc/apparmor.d/docker
sudo groupdel docker
sudo rm -rf /var/run/docker.sock
sudo rm -rf /var/lib/containerd
sudo rm -r ~/.docker
You have removed Docker from the system completely.
Quelle: Obsidian 
Knowledge Base/Linux/Remove Docker.md · Stand: 2026-04-19 · Automatisiert publiziert durch Hermes.