docs/admin/host.md
# Install DTaaS on a Production Server
The installation instructions provided in this README are
ideal for hosting the DTaaS as web application
for multiple users.
## Design
An illustration of the docker containers used and the authorization
setup is shown here.
In the new application configuration, there are two OAuth2 applications.
## Requirements
The installation requirements to run this docker version of the DTaaS are:
### Docker with Compose Plugin
It is mandatory to have [Docker](https://www.docker.com/) installed
on your computer. We highly recommend using
[Docker Desktop](https://www.docker.com/products/docker-desktop/).
### Domain name
The DTaaS software is a web application and is preferably hosted
on a server with a domain name like <http:>_foo.com_</http:>.
It is also possible to use an IP address in place of domain name.
### TLS / HTTPS Certificate (Optional)
It is possible to add HTTPS option to the DTaaS software installation.
Creation of the required TLS certificates is possible through
[certbot](https://certbot.eff.org/).
### OAuth Provider
**[Gitlab Instance](https://about.gitlab.com/install/)** -
The DTaaS uses Gitlab OAuth2.0 authorization for user authorization.
You can either have an on-premise instance of gitlab, or
use [gitlab.com](https://gitlab.com) itself.
### User Accounts
Create user accounts in a linked gitlab instance for all the users.
The default docker compose file contains two - _user1_ and _user2_.
These names need to be changed to suitable usernames.
### OAuth2 Application Registration
The multi-user installation setup requires dedicated authorization
setup for both frontend website and backend services.
Both these authorization requirements are satisfied
using OAuth2 protocol.
- The frontend website is a React single page application (SPA).
- The details of Oauth2 app for the frontend website are in
[client docs](client/auth.md).
- The Oauth2 authorization for backend services is managed
by [Traefik forward-auth](https://github.com/thomseddon/traefik-forward-auth).
The details of this authorization setup are in
[server docs](servers/auth.md).
It is possible to use <https://gitlab.com> or a local installation
of Gitlab can be used for this purpose.
Based on your selection of gitlab instance, it is necessary
to register these two OAuth2 applications and link them
to your intended DTaaS installation.
Please see
[gitlab oauth provider](https://docs.gitlab.com/ee/integration/oauth_provider.html)
documentation for further help with creating these two OAuth applications.
## Clone Codebase
```bash
git clone https://github.com/INTO-CPS-Association/DTaaS.git
cd DTaaS
```
<!-- markdownlint-disable MD046 -->
<!-- prettier-ignore -->
!!! tip file pathnames
1. The filepaths shown here follow Linux OS.
The installation procedures also work with Windows
OS.
1. The description below refers to filenames. All the file
paths mentioned below are relatively to the top-level
**DTaaS** directory.
<!-- markdownlint-enable MD046 -->
## Configuration
Three following configuration files need to be updated.
### Docker Compose
The docker compose configuration is in `deploy/docker/.env.server`.
it is a sample file.
It contains environment variables
that are used by the docker compose files.
It can be updated to suit your local installation scenario.
It contains the following environment variables.
Edit all the fields according to your specific case.
| URL Path | Example Value | Explanation |
|:------------|:---------------|:---------------|
| DTAAS_DIR | '/Users/username/DTaaS' | Full path to the DTaaS directory. This is an absolute path with no trailing slash. |
| SERVER_DNS | <http>_foo.com_</http> | The server DNS, if you are deploying with a dedicated server. Remember not use <http:>http(s)</http:> at the beginning of the DNS string |
| OAUTH_URL | <http>_gitlab.foo.com_<http/> | The URL of your Gitlab instance. It can be <http>_gitlab.com_<http/> if you are planning to use it for authorization. |
| OAUTH_CLIENT_ID | 'xx' | The ID of your server OAuth application |
| OAUTH_CLIENT_SECRET | 'xx' | The Secret of your server OAuth application |
| OAUTH_SECRET | 'random-secret-string' | Any private random string. This is a password you choose for local installation. |
| username1 | 'user1' | The gitlab instance username of a user of DTaaS |
| username2 | 'user2' | The gitlab instance username of a user of DTaaS |
<!-- markdownlint-disable MD046 -->
<!-- prettier-ignore -->
!!! tip
Important points to note:
1. The path examples given here are for Linux OS.
These paths can be Windows OS compatible paths as well.
1. The client configuration file is located at `deploy/config/client/env.js`.
1. The Server DNS can also be an IP address.
However, for proper working it is neccessary to use the
same convention (IP/DNS) in the client configuration file as well.
<!-- markdownlint-enable MD046 -->
### Website Client
The frontend React website requires configuration which is specified
in the client configuration file (`deploy/config/client/env.js`).
Further explanation on the client configuration is available in
[client config](client/config.md).
<!-- markdownlint-disable MD046 -->
<!-- prettier-ignore -->
!!! tip
There is a default OAuth application registered on <https://gitlab.com>
for client. The corresponding OAuth application
details are:
```js
REACT_APP_CLIENT_ID: '1be55736756190b3ace4c2c4fb19bde386d1dcc748d20b47ea8cfb5935b8446c',
REACT_APP_AUTH_AUTHORITY: 'https://gitlab.com/',
```
**This can be used for test purposes**. Please use your own OAuth application
for secure production deployments.
<!-- markdownlint-enable MD046 -->
### Create User Workspace
The existing filesystem for installation is setup for `files/user1`.
A new filesystem directory needs to be created for the selected user.
Please execute the following commands from the top-level directory
of the DTaaS project.
```bash
cp -R files/user1 files/username
```
where _username_ is one of the selected usernames. This command
needs to be repeated for all the selected users.
### Configure Authorization Rules for Backend Authorization
The Traefik forward-auth microservices requires configuration rules to manage
authorization for different URL paths.
The `deploy/docker/conf.server` file can be used to
configure the authorization for user workspaces.
```text
rule.onlyu1.action=auth
rule.onlyu1.rule=Path(`/user1`)
rule.onlyu1.whitelist = user1@localhost
rule.onlyu1.action=auth
rule.onlyu1.rule=Path(`/user2`)
rule.onlyu1.whitelist = user2@localhost
```
Please change the usernames and email addresses to the matching
user accounts on the OAuth provider
(either <https://gitlab.foo.com> or <https://gitlab.com>).
#### Caveat
The usernames in the `deploy/docker/.env.server` file need to match those in
the `deploy/docker/conf.server` file.
Traefik routes are controlled by the `deploy/docker/.env.server` file.
Authorization on these routes is controlled by the `deploy/docker/conf.server` file.
If a route is not specified in `deploy/docker/conf.server` file
but an authorisation is requested by traefik for this unknown route,
the default behavior of
traefik forward-auth kicks in. This default behavior is to enable
endpoint being available to any signed in user.
If there are extra routes in `deploy/docker/conf.server` file but these are not
in `deploy/docker/.env.server` file,
such routes are not served by traefik; it will give **404 server response**.
## Access Rights Over Files
<!-- markdownlint-disable MD046 -->
<!-- prettier-ignore -->
!!! warning
The default setting in docker compose file exposes
all user files at <http://foo.com/lib/files>.
All files of all the users are readable-writable by
all logged in users.
The `compose.server.yml` / `compose.server.secure.yml` file needs to be
updated to expose another directory like common assets directory.
<!-- markdownlint-enable MD046 -->
If you wish to reduce this scope to only **common assets**,
please change,
```yaml
libms:
image: intocps/libms:latest
restart: unless-stopped
volumes:
- ${DTAAS_DIR}/deploy/config/lib.env:/dtaas/libms/.env
- ${DTAAS_DIR}/files/common:/dtaas/libms/files
```
The change in the last line. The `${DTAAS_DIR}/files`
got replaced by `${DTAAS_DIR}/files/common`. With this change, only
common files are readable-writable by all logged in users.
### Add TLS Certificates (Optional)
The application can be served on HTTPS connection for which TLS certificates
are needed. The certificates need to be issued for `foo.com` or `*.foo.com`.
The names of the certificates must be `fullchain.pem` and `privkey.pem`. Copy
these two certificate files into:
- `certs/foo.com/fullchain.pem`
- `certs/foo.com/privkey.pem`
Traefik will run with self-issued certificates if the above two certificates
are either not found or found invalid.
Remember to update `dynamic/tls.yml` with correct path matching your DNS name.
For example, if your DNS name is `www.foo.com`, then copy the
TLS certificates of `www.foo.com` to `certs/` directory and update
`dynamic/tls.yml` as follows.
```yml
tls:
certificates:
- certFile: /etc/traefik-certs/www.foo.com/fullchain.pem
keyFile: /etc/traefik-certs/www.foo.com/privkey.pem
stores:
- default
```
## Run
### Over HTTP
This docker compose file serves application over HTTP.
The commands to start and stop the appliation are:
```bash
docker compose -f compose.server.yml --env-file .env.server up -d
docker compose -f compose.server.yml --env-file .env.server down
```
To restart only a specific container, for example `client``
```bash
docker compose -f compose.server.yml --env-file .env.server up -d --force-recreate client
```
### Over HTTPS
This docker compose file serves application over HTTP.
The commands to start and stop the appliation are:
```bash
docker compose -f compose.server.secure.yml --env-file .env.server up -d
docker compose -f compose.server.secure.yml --env-file .env.server down
```
To restart only a specific container, for example `client``
```bash
docker compose -f compose.server.secure.yml --env-file .env.server up -d --force-recreate client
```
## Use
The application will be accessible at:
<http(s)://foo.com> from web browser.
Sign in using your account linked to
either _gitlab.com_ or your local gitlab instance.
All the functionality of DTaaS should be available to your users
through the single page client now.
You may have to click Sign in to Gitlab on the Client page
and authorize access to the shown application.
### Adding a new user
Please see the [add new user](guides/add_user.md) to add new users.
## References
Image sources:
[Traefik logo](https://www.laub-home.de/wiki/Traefik_SSL_Reverse_Proxy_f%C3%BCr_Docker_Container),
[ml-workspace](https://github.com/ml-tooling/ml-workspace),
[reactjs](https://krify.co/about-reactjs/),
[gitlab](https://gitlab.com)