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Add docker-in-docker instructions for k8s #941

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68 changes: 68 additions & 0 deletions doc/self-hosted/index.md
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Expand Up @@ -123,3 +123,71 @@ Options:

### Help
Use `code-server --help` to view the usage for the CLI. This is also shown at the beginning of this section.

## Docker in Docker

### Kubernetes Example

This is a Kubernetes deployment for `code-server` that can run `docker` containers. It uses the official `dind` ([docker-in-docker](https://hub.docker.com/_/docker)) image and copies the `docker` binary to the `code-server` container on startup (in `/usr/local/bin`, which is empty by default).

```
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: code-server
namespace: default
spec:
replicas: 1
template:
metadata:
labels:
app: code-server
spec:
initContainers:
- name: copy-docker-binary
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Can't you do this in a Dockerfile instead? It should lessen the need to allocate additional resources for such a task that a image build would be more fit to.

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The problem with using a Dockerfile is that we have to push and maintain the image @sr229.

I suppose its not a big deal though to include the docker CLI by default in codercom/code-server.

image: docker:stable-dind
command: ['sh', '-c', 'cp /usr/local/bin/docker /code-server-bin/']
volumeMounts:
- name: code-server-usr-local-bin
mountPath: /code-server-bin
containers:
- name: code-server
image: linuxserver/code-server
imagePullPolicy: Always
ports:
- containerPort: 8443
name: https
envFrom:
- configMapRef:
name: code-server
- secretRef:
name: code-server
volumeMounts:
- name: config
mountPath: /config
readOnly: false
- name: code-server-usr-local-bin
mountPath: /usr/local/bin
- name: dind-daemon
image: docker:stable-dind
env:
- name: DOCKER_TLS_CERTDIR
value: ""
resources:
requests:
cpu: 20m
memory: 512Mi
securityContext:
privileged: true
volumeMounts:
- name: docker-graph-storage
mountPath: /var/lib/docker
volumes:
- name: config
persistentVolumeClaim:
claimName: code-server-config
- name: docker-graph-storage
emptyDir: {}
- name: code-server-usr-local-bin
emptyDir: {}
```