Compute Integration

Initial Setup

1. Create MongoDB Cluster or use an existing one:

   • If you don't have a MongoDB cluster, create one on MongoDB online.

2. Connect Cluster to Controller:

   • Copy the connection string provided by MongoDB online.

   • Paste the connection string into the connectionString variable in controller/controller.go.

     const connectionString = "YOUR_CONNECTION_STRING"

3. Specify Variables in controller/controller.go:

   • Replace "Your_DATABASE_NAME" with your desired database name in the dbName variable.

     const dbName = "Your_DATABASE_NAME"

   • Replace "Your_COLLECTION_NAME" with your desired collection name in the colName variable.

     const colName = "Your_COLLECTION_NAME"

   • Replace "Your_DESIRED_ZONE" with your desired zone name in the zone variable.

     const zone = "Your_DESIRED_ZONE"

   • Replace "PPROJECT-ID" with your projectId in the project variable.

     const project = "PPROJECT-ID"

   • Replace "YOUR API-KEY" with your Google Cloud API Key in the API_KEY variable.

     const API_KEY = "YOUR API-KEY"

Flow

In main.go, a router is created using the Gin framework, handling 4 types of requests:

• GET "/instances":

  • Fetches all the running and available instances from the cloud platform.

• PUT "/instance":

  • Takes a query parameter of instance_type and provides all the details of instances of that type.

• PUT "/instances":

  • Takes a query parameter of instance_id and updates the status key of that instance in the database to terminate and delete the instance.

• POST "/instance":

  • Takes a JSON request with keys "types" and "name" asking for the value of the instance type and instance name.
  • Creates an instance with that name and type, storing it in the database.

Functionality Details:

• GetInstances:

  • Checks all the details of instances corresponding to the instance type using getInstanceDetail.
  • Lists instances whose status is not running.

• GetInstanceDetail:

  • Checks if the instance corresponding to the instance type is present in the database.
  • Updates its values if it is present, otherwise puts it into the database.

• TerminateInstance:

  • Terminates the instance with the provided instance id.
  • Calculates the cost of the instance and feeds that information into the database.

• CreateInstance:

  • Creates an instance with a port between 9000-9100.
  • Stores the instance in the MongoDB database.