Dohub

Dohub

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Welcome,

Welcome,

Workspace

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Sign in with GitHub to create and run codehub workspaces on Kubernetes.

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My drives

No drives yet. Use Create drive or Bulk create drive to provision a DirectPV volume.

No drives match your filter.

· Right-click to select · Shift+right-click for range

My images

Submit custom Docker images for use in servers. New images require admin approval.

Submit image

No images submitted yet.

No images match your filter.

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Label	Repository	Default tag	Tags	Status	Actions

Cluster overall

Cluster information

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Join new node

Runs microk8s add-node on the host where this hub can reach the microk8s CLI.

Kubernetes nodes

Name	Status	Roles	Internal IP	External IP	Version	OS	CPU	Memory

No nodes reported.

SSH nodes

Manage external SSH hosts. Add the hub public key to each node before connecting.

Hub SSH manager public key

Add this key to ~/.ssh/authorized_keys on each node (as the configured user).

Loading manager key…

Loading SSH nodes…

No SSH nodes yet. Click Add SSH node to register one.

No status yet

DirectPV drives

From kubectl directpv list drives

No DirectPV drives listed.

DirectPV discover

Runs kubectl directpv discover --output-file and lets you choose drives to initialize.

Saving selection…

No discover file yet. Click Discover to scan cluster nodes for available drives.

Drive management

Resources Usage

Allocated (requested) resources by node. Drive from DirectPV.

Loading…

Node	CPU	RAM	Drive	GPU

No node data.

My servers

No servers yet. Use Create server or Bulk create server to get started.

No servers match your filter.

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User management

Server management

Docker images

· Right-click row to select · Shift+right-click for range

Label	Repository	Default tag	Tags	Creator	Status	Active	Actions
No images match your filters.
				—

Networking

Public ingress and in-cluster addresses (when the server is deployed).

Service domain

Custom ingress host. Default would be . Use Edit to change.

Service DNS

Pod name

Pod domain

Pod IP

Environment variables

None

Exposing port through websocket tunnel

Forward TCP ports through wss://<domain>/<user>/<slug>/port-tunnel on the hub domain (HTTPS port 443).

Container ports

Comma-separated TCP ports on the main container (127.0.0.1 inside the pod). Clear the field and click Expose to disable the tunnel sidecar.

SSH via stdio tunnel (ports 22 / 2222)

Use wstunnel in stdio mode with OpenSSH ProxyCommand. SSH traffic is proxied through the same WebSocket tunnel — no local TCP listener and no ssh-bridge sidecar.

ProxyCommand (wstunnel stdio)

One-shot SSH

~/.ssh/config snippet — then ssh <Host>

Replace coder with the SSH user inside the container if different. %h and %p are expanded by SSH to reach 127.0.0.1:<port> in the pod.

How to connect (wstunnel client)

Install wstunnel from wstunnel releases and add it to your PATH.
Click Expose above while the server is running (or start it after saving ports).
Run the client command below — it listens on your machine and forwards through the WebSocket tunnel to the container port.
Open http://localhost:<port> (or your DB/client tool) on the local port shown.
For ports 22 or 2222, use the SSH via ProxyCommand guide above (stdio) instead of binding those ports locally.

Path prefix must match the server sidecar (-P on the client, -r on the server).

WSS URL

All ports

TCP

Enter container ports and click Expose. The server must be running for the sidecar to start immediately.

Collaborators

Add users by username and grant permissions for this server.

Username

No matching users

Start/Stop Edit Terminal Delete Manage collaborators

User	Start/Stop	Edit	Terminal	Delete	Manage	Actions
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No collaborators yet.

Pod Container

Auto-refreshes every 2s · kubectl logs

kubectl describe deployment,pod

Pod Shell

Interactive shell in the main container via kubectl exec -it. Server must be running.

Pod Range

Auto-refreshes every 2s · Last · monitor-sidecar · Daily files metrics-YYYY-MM-DD.jsonl (30-day retention) · Download is a .tar.gz archive

Waiting for metrics… Start the server or redeploy to include the monitor sidecar.

CPU

RAM

GPU

GPU memory

rclone backup

Sync workspace folders to cloud storage with rclone. The backup sidecar always runs with the server. Schedule pushes config and starts cron in the sidecar. Backup now runs rclone immediately via kubectl exec. Stop backup stops cron only — the sidecar container stays running.

Cron schedule Remote destination

Five-field cron (minute hour day month weekday). Remote is remote:path from your config — each selected volume syncs to a subfolder under that path (named from the mount path).

rclone.conf (saved in database)

Volumes to backup

Choose workspace PVCs by their mount path in the main container. The backup sidecar mounts only the selected volume(s) at the same path.

PVC · subPath

No drives mounted on this server — add drives in the General tab first.

Select at least one volume before scheduling.

Latest backup

Running… Success Failed No run yet Last run:

Auto-refreshes every 1s · Uses rclone sync with --log-file and --stats 30s

Group : CPU ≤ vCPU, RAM ≤ G, GPU VRAM ≤ G, servers

Quick templates

Click to fill the form below.

Configuration

Server name

Service domain (ingress host)

Optional custom hostname for nginx/traefik ingress. Leave empty to use the default auto-generated subdomain. Applied on save (and on next start if the release already exists).

CPU (vCPU)

RAM

Limit / request ratio (CPU & RAM)

Kubernetes resources.limits for CPU and memory. Example: CPU request vCPU → limit vCPU; RAM request → limit .

Node

Choose auto to let Kubernetes schedule. Selecting a node pins the workspace using nodeSelector.

Mount drives (optional)

Leave empty for ephemeral storage. The same drive may be mounted at multiple paths — each path uses a matching PVC subPath.

No drives yet. Create one in the Drives tab or remove mount rows.

No drives mounted.

Mount files (optional)

Upload text files (txt, js, json, .env, yaml, …). Each file is stored in a Kubernetes ConfigMap and mounted at the path you choose. Max 1 MiB per file; total across all files must stay under 1 MiB.

No files mounted.

GPU

Privileged container Run as root with securityContext.privileged: true. Required for some Docker-in-Docker or FUSE workloads.

Docker image

No matching images

Version (tag)

Image pull policy

Kubernetes imagePullPolicy when the pod starts.

Exposed ports (comma-separated)

Container command (space-separated)

Init container Run one init container before the main container starts. It uses the same volume mounts, file mounts (ConfigMap), and environment variables as the main container.

Init container image

Select a Docker image above to use the main container image for the init container.

Init container command (space-separated)

Environment variables

Click a row to load it into the editor. Long keys and values wrap instead of overflowing.

No variables yet.

Current specifications