Multi Container App

• Client
• Server
• Worker

Tech

• React
• Postgres
• Redis
• Nginx

Nginx

Create a folder ngnix and create a file default.conf

• Tell Nginx that there is an 'upstream server' at client:3000 and api:5000.
• client is the same name as we have in decker compose file, same for api.
• We would expose port 80.
• If anyone comes for '/' send them to client upstream
• if anyone goes to '/api' send to api upstream
• we rewrite the incoming request and remove the '/api' from it.
• Then create a new docker file to configure the nginx.
• For hot reload we need to configure nginx to allow websocket to web devserver

Travis

• Add your docker logins to your Travis account for the repository.
• Than we will login using a single line command into docker echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_ID" --password-stdin
• Travis on every push to master will build our test react app and run test.
• Build our docker image for all our apps.
• Than push them to docker hub.

AWS Elastic BeanStalk

• We will create a 'Dockerrun.aws.josn' file that will tell AWS where to pul our images, what resources to allocate, how to setup port mapping, etc.
• This is similar to docker-compose for local development.
• It uses Elastic container service(ECS) to run container.
• ECS has task definiton file, that tells how to run the container.
• essential in the container definition file means, the containe is essential, so if that crashes, close all other containers automatically.
• At least one container have to be marked as "essential".
• In order for EB to talk to RDS(Postgress) and EC(Redis) inside a VPC, we would create security group and asssing to them, and set a security rule saying "Allow any traffic from any ither AWS service that belong to that group"