> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/on-premises/da/kom-godt-i-gang/requirements/setup-docker.md).

# Opsæt Docker

Overleaf kører på Docker. Du skal installere:

* Docker Engine (Docker CE)
* Docker Compose **plugin** (`docker compose`, v2)

Disse trin er rettet mod en nyere Ubuntu LTS (20.04/22.04/24.04).

{% hint style="warning" %}
Undgå at installere `docker.io` fra Ubuntus standard-apt-lager.\
Brug Docker's officielle lager, så du får en nyere Docker-version og `docker compose` plugin.
{% endhint %}

Den officielle dokumentation kommer fra: <https://docs.docker.com/engine/install/ubuntu/>.

{% stepper %}
{% step %}

### 1) Fjern gamle/modstridende pakker (hvis de findes)

Hvis Docker tidligere blev installeret fra en anden kilde, så fjern det først:

{% code overflow="wrap" %}

```bash
 sudo apt remove $(dpkg --get-selections docker.io docker-compose docker-compose-v2 docker-doc podman-docker containerd runc | cut -f1)
```

{% endcode %}

Denne kommando er sikker, hvis nogle pakker ikke er installeret.
{% endstep %}

{% step %}

### 2) Tilføj Dockers officielle apt-lager

Installer forudsætninger:

```bash
sudo apt update
sudo apt install -y ca-certificates curl
```

Tilføj Docker GPG-nøglen:

{% code overflow="wrap" %}

```bash
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc
```

{% endcode %}

Tilføj lageret:

{% code overflow="wrap" %}

```bash
# Tilføj lageret til Apt-kilder:
sudo tee /etc/apt/sources.list.d/docker.sources <<EOF
Types: deb
URIs: https://download.docker.com/linux/ubuntu
Suites: $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}")
Components: stable
Signed-By: /etc/apt/keyrings/docker.asc
EOF

sudo apt update
```

{% endcode %}
{% endstep %}

{% step %}

### 3) Installer Docker Engine + Compose-plugin

Installer Docker og Compose-pluginet:

{% code overflow="wrap" %}

```bash
sudo apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
```

{% endcode %}

Start Docker ved opstart:

```bash
sudo systemctl enable --now docker
```

{% endstep %}

{% step %}

### 4) Verificér installationen

Disse kommandoer bør køre uden fejl:

```bash
docker --version
docker compose version
sudo docker run --rm hello-world
docker ps
```

{% endstep %}

{% step %}

### 5) (Valgfrit) Kør Docker uden sudo

Tilføj din bruger til `docker` gruppen:

```bash
sudo usermod -aG docker $USER
```

Derefter **log ud og ind igen**, eller kør:

```bash
newgrp docker
```

Nu bør dette virke uden `sudo`:

```bash
docker ps
```

{% hint style="danger" %}
Den `docker` gruppen har root-lignende adgang på værten.\
Dette er forventet for typiske Overleaf-installationer og er især relevant, hvis du aktiverer Sandboxed Compiles.
{% endhint %}
{% endstep %}
{% endstepper %}

### Næste trin

Når Docker virker, skal du fortsætte med installationsstegene for Toolkit i [Brug af Toolkit](/on-premises/da/installation/using-the-toolkit.md).


---

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