ocs-web

Background

This is browser-based control panel system for OCS, written in Vue 3.

Project setup

Run this to fetch all dependencies into the project node_modules directory:

$ npm install

Development

Compiles and hot-reloads for development

npm run serve

This will run vue-cli-service serve under the hood, and you can pass additional arguments to that if you protect them with --. For example:

npm run serve -- --port 8888 --mode production

Compiles and minifies for production

To compile for production into the dist/ directory:

npm run build

Lints and fixes files

npm run lint

Customize Vue configuration

See Configuration Reference.

Configuration

There are two ways to configure pre-set crossbar server connections, which users can then select in the ocs-web interface. These configurations are not strictly required, since there is always a "custom" field, which users can enter connection details into. In practice, they are quite useful.

config.json

You can setup OCS configs by editing public/config.json, prior to build. After build, you can alter dist/config.json.

In the nginx docker image, you can mount a config.json to /app/dist/config.json.

The schema for config.json is like this::

{"crossbars": [
    {"name": "ocs-8001",
     "url": "ws://localhost:8001/ws",
     "realm": "test_realm",
     "addr_root": "observatory"},
    {"name": "ocs-8002",
     "url": "ws://localhost:8002/ws",
     "realm": "test_realm",
     "addr_root": "platform2"}
    ]
}

Note that realm and addr_root are optional, and will default to values test_realm and observatory.

Environment variables

Note: This method isn't supported when using the pre-built docker image.

Place configuration into .env.local before building. (See https://cli.vuejs.org/guide/mode-and-env.html#environment-variables for general info.)

VUE_APP_OCS_ADDRS

This variable carries zero or more "OCS configs". Each "OCS config" is defined by a name (e.g. "My OCS"; this is only used in this application), the URL of the WAMP router's websocket server (e.g. "ws://example.com/crossbar/ws"), the WAMP realm (e.g. "ocsrealm"), and the OCS "address root" (e.g. "observatory").

Each OCS config is constructed by joining those four things together with commas; multiple OCS configs are separated by semicolons. So the result should look like this:

VUE_APP_OCS_ADDRS=My OCS,ws://example.com/crossbar/ws,ocsrealm,observatory

(If 3 or fewer tokens are specified, then the address root defaults to "observatory"; if only 2 tokens are specified then the realm defaults to "test_realm".)

Here's a multi-config example:

VUE_APP_OCS_ADDRS=Lab1,ws://localhost:8001/ws,test_realm;Lab2,ws://localhost:8002/ws,test_realm,platform2

(In addition to these "static" OCS configs, the "custom" config is always available in the interface, and cookies are used to keep a user's custom URL and realm saved in their browser.)

Docker

The Dockerfile in this directory will produce an image that serves the built product from npm run build via an nginx server.

To build the image and tag it as "ocs-web":

docker build -t ocs-web .

To launch the image as a test:

docker run -p 8080:80 --rm ocs-web

Then browse to http://localhost:8080/

Here is a docker-compose.yaml that declares a service running the ocs-web image and mounts in a configuration file:

version: '2'
services:
  ocs-web-1:
    image: ocs-web
    ports:
      - 8080:80
    volumes:
      - ./config.json:/app/dist/config.json:ro

Development tips

Mocking Jagent

For development in cases where you can't run the real agent, you can run a dummy agent with an interface specified in a yaml file. See the docstring header in agent/agent.py, and any yaml definition files in that directory for configuration examples.