[Kasm](https://www.kasmweb.com/?utm_campaign=LinuxServer&utm_source=listing) Workspaces is a docker container streaming platform for delivering browser-based access to desktops, applications, and web services. Kasm uses devops-enabled Containerized Desktop Infrastructure (CDI) to create on-demand, disposable, docker containers that are accessible via web browser. Example use-cases include Remote Browser Isolation (RBI), Data Loss Prevention (DLP), Desktop as a Service (DaaS), Secure Remote Access Services (RAS), and Open Source Intelligence (OSINT) collections.
The rendering of the graphical-based containers is powered by the open-source project [KasmVNC](https://www.kasmweb.com/kasmvnc.html?utm_campaign=LinuxServer&utm_source=kasmvnc).
We utilise the docker manifest for multi-platform awareness. More information is available from docker [here](https://github.com/docker/distribution/blob/master/docs/spec/manifest-v2-2.md#manifest-list) and our announcement [here](https://blog.linuxserver.io/2019/02/21/the-lsio-pipeline-project/).
Simply pulling `lscr.io/linuxserver/kasm:latest` should retrieve the correct image for your arch, but you can also pull specific arch images via tags.
This image provides various versions that are available via tags. Please read the descriptions carefully and exercise caution when using unstable or development tags.
This container uses [Docker in Docker](https://www.docker.com/blog/docker-can-now-run-within-docker/) and requires being run in `privileged` mode. This container also requires an initial setup that runs on port 3000.
**Unlike other containers the web interface port (default 443) needs to be set for the env variable `KASM_PORT` and both the inside and outside port IE for 4443 `KASM_PORT=4443``-p 4443:4443`**
**Unraid users due to the DinD storage layer `/opt/` should be mounted directly to a disk IE `/mnt/disk1/appdata/path` or optimally with a cache disk at `/mnt/cache/appdata/path`**
Access the installation wizard at https://`your ip`:3000 and follow the instructions there. Once setup is complete access https://`your ip`:443 and login with the credentials you entered during setup. The default users are:
* admin@kasm.local
* user@kasm.local
Currently Synology systems are not supported due to them blocking CPU scheduling in their Kernel.
During installation an option will be presented to force all Workspace containers to mount in and use a specific GPU. If using an NVIDIA GPU you will need to pass `-e NVIDIA_VISIBLE_DEVICES=all` or `--gpus all` and have the [NVIDIA Container Runtime](https://github.com/NVIDIA/nvidia-container-runtime) installed on the host. Also if using NVIDIA, Kasm Workspaces has [native NVIDIA support](https://www.kasmweb.com/docs/latest/how_to/gpu.html) so you can optionally opt to simply use that instead of he manual override during installation.
### Gamepad support
In order to properly create virtual Gamepads you will need to mount from your host `/dev/input` and `/run/udev/data`. Please see [HERE](https://www.kasmweb.com/docs/develop/guide/gamepad_passthrough.html) for instructions on enabling gamepad support.
### Persistant profiles
In order to use persistant profiles in Workspaces you will need to mount in a folder to use from your host to `/profiles`. From there when configuring a workspace you can set the `Persistant Profile Path` to IE `/profiles/ubuntu-focal/{username}/`, more infomation can be found [HERE](https://www.kasmweb.com/docs/latest/how_to/persistent_profiles.html).
A sample for [SWAG](https://github.com/linuxserver/docker-swag) can be found [here](https://raw.githubusercontent.com/linuxserver/reverse-proxy-confs/master/kasm.subdomain.conf.sample). Post installation you will need to modify the "Proxy Port" setting under the default zone to 0 as outlined [here](https://www.kasmweb.com/docs/latest/how_to/reverse_proxy.html#update-zones) to launch Workspaces sessions.
This image uses a self-signed certificate by default. This naturally means the scheme is `https`.
If you are using a reverse proxy which validates certificates, you need to [disable this check for the container](https://docs.linuxserver.io/faq#strict-proxy).
## Usage
To help you get started creating a container from this image you can either use docker-compose or the docker cli.
### docker-compose (recommended, [click here for more info](https://docs.linuxserver.io/general/docker-compose))
Containers are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate `<external>:<internal>` respectively. For example, `-p 8080:80` would expose port `80` from inside the container to be accessible from the host's IP on port `8080` outside the container.
For all of our images we provide the ability to override the default umask settings for services started within the containers using the optional `-e UMASK=022` setting.
Keep in mind umask is not chmod it subtracts from permissions based on it's value it does not add. Please read up [here](https://en.wikipedia.org/wiki/Umask) before asking for support.
## Docker Mods
[](https://mods.linuxserver.io/?mod=kasm "view available mods for this container.") [](https://mods.linuxserver.io/?mod=universal "view available universal mods.")
We publish various [Docker Mods](https://github.com/linuxserver/docker-mods) to enable additional functionality within the containers. The list of Mods available for this image (if any) as well as universal mods that can be applied to any one of our images can be accessed via the dynamic badges above.
docker inspect -f '{{ index .Config.Labels "build_version" }}' kasm
```
* Image version number:
```bash
docker inspect -f '{{ index .Config.Labels "build_version" }}' lscr.io/linuxserver/kasm:latest
```
## Updating Info
Most of our images are static, versioned, and require an image update and container recreation to update the app inside. With some exceptions (ie. nextcloud, plex), we do not recommend or support updating apps inside the container. Please consult the [Application Setup](#application-setup) section above to see if it is recommended for the image.
Below are the instructions for updating containers:
### Via Docker Compose
* Update images:
* All images:
```bash
docker-compose pull
```
* Single image:
```bash
docker-compose pull kasm
```
* Update containers:
* All containers:
```bash
docker-compose up -d
```
* Single container:
```bash
docker-compose up -d kasm
```
* You can also remove the old dangling images:
```bash
docker image prune
```
### Via Docker Run
* Update the image:
```bash
docker pull lscr.io/linuxserver/kasm:latest
```
* Stop the running container:
```bash
docker stop kasm
```
* Delete the container:
```bash
docker rm kasm
```
* Recreate a new container with the same docker run parameters as instructed above (if mapped correctly to a host folder, your `/config` folder and settings will be preserved)
* You can also remove the old dangling images:
```bash
docker image prune
```
### Via Watchtower auto-updater (only use if you don't remember the original parameters)
* Pull the latest image at its tag and replace it with the same env variables in one run:
```bash
docker run --rm \
-v /var/run/docker.sock:/var/run/docker.sock \
containrrr/watchtower \
--run-once kasm
```
* You can also remove the old dangling images: `docker image prune`
!!! warning
We do not endorse the use of Watchtower as a solution to automated updates of existing Docker containers. In fact we generally discourage automated updates. However, this is a useful tool for one-time manual updates of containers where you have forgotten the original parameters. In the long term, we highly recommend using [Docker Compose](https://docs.linuxserver.io/general/docker-compose).
We recommend [Diun](https://crazymax.dev/diun/) for update notifications. Other tools that automatically update containers unattended are not recommended or supported.
## Building locally
If you want to make local modifications to these images for development purposes or just to customize the logic:
