Purpose

Create a demonstrable, load balanced application stack with nginx as a load balancer using either nginx or apache as a backend.

Usage

You will need to replace the environment variables for the nginx-lb service.

• SE_API_TOKEN: This is your Container Application Center (CAC) API Token. It is used by confd to connect to the CAC Service Discovery layer.
• SE_LEADER_IP: The private IP address of the mesh leader.
• SE_SERVICE_DISCOVERY_KEY: The portion of the service discovery key to check for changes. Backends to haproxy are written based on the values of these keys. (See below for how to construct them.)

Constructing a Service Discovery Key and Range

The construction of a Service Discovery key is done as follows:

• {{application_instance_name}} + "-" + {{service_name}} + "-"
  • {{exposed_ port}}

TThe application_instance_name is what you set when clicking the "Launch" button.

The service_name is defined when dragging a component into the editor graphically as the "Name". It is also seen as the service name in the YAML.

The exposed_port is the internally exposed port for the backend container. For both nginx and apache this will be 80.

In the case of nginx-apache.yml, that would be the line reading "apache-backend-eg".

So, given that you name an application "nginx-lb-test" and the apache backends "my-backend", and that nginx is listening on port 80 inside the container you would have the service discovery key:

nginx-lb-test-my-backend-80

Questions

Visit the StackEngine community to get help or make a suggestion.

Contributing

If you would like to contribute to this project, please follow the standard fork-and-pr method.

License

MIT