Simple sync to websockets stack

This is an example on how to communicate from your server side code written in PHP, Python, other, to a websocket server via Redis.

Docker

Using the Dockerfile only

Build the container first:

docker build -t websockets-sample .

Run the container:

docker run --name websockets --rm -d -p 9100:9100 websockets-sample

Run the container and mount a volume:

docker run -v /host/directory:/container/directory --name websockets --rm -d -p 9100:9100 websockets-sample

Note: the --rm flag automatically removes the container when it exits, so you just need to stop it and not to remove it manually, more info here

Use the bash shell of the container:

docker exec -t -i websockets /bin/bash

Stop the container:

docker stop websockets

Good to know

Get the list of the containers:

# Get the list of the containers for the current project
docker ps

# Get the list of all containers
docker ps -a

# Get only the last container created
docker ps -al

Remove the container for the project:

# show all the container to find the <CONTAINER ID>
docker ps -a
# use the container id <CONTAINER ID> for the pricing-ui to remove it from the active containers
docker rm <CONTAINER ID>

Using docker-compose

To start the server, and it's the first run, you need to build it first with:

docker-compose build

And then you can simply start it with:

docker-compose up

To access to the console of each container, you can run this command:

// access to the web container
$ docker-compose exec web /bin/bash

// access to the mongo container
$ docker-compose exec mongo /bin/bash

Be aware that before you can start the server properly, you will need to install npm dependencies with npm install, and after you start it with docker-compose you will need to access to the mongo instance, add a user to the database you want to use, and then update the config/docker.json file (if you don't have it, just copy the config/docker.sample.json file).

PM2 commands

PM2 has some handy commands to monitoring the server status, these ones are the most common, but you can type sudo pm2 --help to get the full list.