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AWScloud~5 mins

API deployment and stages in AWS - Commands & Configuration

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Introduction
When you create an API on AWS, you need to deploy it so people can use it. Deployment means making your API live. Stages let you have different versions of your API, like testing or production, so you can try changes safely before everyone uses them.
When you want to make your API available on the internet after building it.
When you want to test new API changes without affecting users by using a separate stage.
When you want to have a stable version of your API for customers and a development version for your team.
When you want to organize your API versions clearly for easier management.
When you want to roll back to a previous API version if something goes wrong.
Commands
This command creates a new REST API named MyExampleAPI in AWS API Gateway.
Terminal
aws apigateway create-rest-api --name MyExampleAPI
Expected OutputExpected
{ "id": "a1b2c3d4e5", "name": "MyExampleAPI", "createdDate": "2024-06-01T12:00:00Z", "endpointConfiguration": { "types": ["REGIONAL"] } }
→
--name - Sets the name of the new API.
This command deploys the API with ID a1b2c3d4e5 to a stage named 'dev', making it accessible for testing.
Terminal
aws apigateway create-deployment --rest-api-id a1b2c3d4e5 --stage-name dev
Expected OutputExpected
{ "id": "d6f7g8h9i0", "createdDate": "2024-06-01T12:05:00Z", "stageName": "dev" }
→
--rest-api-id - Specifies which API to deploy.
→
--stage-name - Names the deployment stage.
This command lists all deployment stages for the API with ID a1b2c3d4e5, so you can see available versions.
Terminal
aws apigateway get-stages --rest-api-id a1b2c3d4e5
Expected OutputExpected
{ "item": [ { "stageName": "dev", "deploymentId": "d6f7g8h9i0", "createdDate": "2024-06-01T12:05:00Z" } ] }
→
--rest-api-id - Specifies which API's stages to list.
This command deploys the API to the 'prod' stage, making it the live version for users.
Terminal
aws apigateway create-deployment --rest-api-id a1b2c3d4e5 --stage-name prod
Expected OutputExpected
{ "id": "j1k2l3m4n5", "createdDate": "2024-06-01T12:10:00Z", "stageName": "prod" }
→
--rest-api-id - Specifies which API to deploy.
→
--stage-name - Names the deployment stage.
Key Concept

If you remember nothing else from this pattern, remember: deploying your API to different stages lets you test safely and release updates smoothly.

Common Mistakes
Deploying the API without specifying a stage name.
The deployment will succeed but no stage is created, so the API won't be accessible.
Always use the --stage-name flag to create a stage during deployment.
Using the wrong API ID when deploying or listing stages.
Commands will fail or show no results because the API ID does not match any existing API.
Double-check the API ID from the create-rest-api output before running deployment or stage commands.
Not creating a deployment after making API changes.
Changes won't be visible to users until a new deployment is created.
Run create-deployment with the correct API ID and stage name after any API updates.
Summary
Create a new REST API using aws apigateway create-rest-api.
Deploy the API to a named stage using aws apigateway create-deployment with --stage-name.
Check existing stages with aws apigateway get-stages to manage versions.
Use stages to separate testing and production environments for safe updates.

Practice

(1/5)
1. What is the main purpose of an API stage in AWS API Gateway?
easy
A. To monitor network traffic outside AWS
B. To store API keys for users
C. To create backend Lambda functions
D. To manage different versions or environments of the API

Solution

  1. Step 1: Understand API stages concept

    API stages in AWS API Gateway represent different versions or environments like development, testing, or production.

  2. Step 2: Identify the role of stages

    Stages allow you to deploy and manage separate API versions independently.

  3. Final Answer:

    To manage different versions or environments of the API -> Option D

  4. Quick Check:

    API stages = version/environment management [OK]
Hint: Stages separate API versions or environments [OK]
Common Mistakes:
  • Confusing stages with API keys
  • Thinking stages create backend functions
  • Assuming stages monitor external traffic
2. Which AWS CLI command is used to create a new deployment for an API Gateway REST API?
easy
A. aws apigateway create-deployment
B. aws apigateway create-stage
C. aws apigateway deploy-api
D. aws apigateway new-deployment

Solution

  1. Step 1: Identify the correct AWS CLI command for deployment

    The command to create a deployment in API Gateway is create-deployment.

  2. Step 2: Differentiate from other commands

    create-stage creates a stage, not a deployment. Other options are invalid commands.

  3. Final Answer:

    aws apigateway create-deployment -> Option A

  4. Quick Check:

    Deployment command = create-deployment [OK]
Hint: Deploy with 'create-deployment' command [OK]
Common Mistakes:
  • Using create-stage instead of create-deployment
  • Assuming deploy-api is a valid command
  • Confusing deployment with stage creation
3. Given the following AWS CLI command:
aws apigateway create-stage --rest-api-id abc123 --stage-name prod --deployment-id dep456
What does this command do?
medium
A. Creates a new deployment named 'prod' for API 'abc123'
B. Creates a new stage 'prod' linked to deployment 'dep456' for API 'abc123'
C. Deletes the stage 'prod' from API 'abc123'
D. Updates the deployment 'dep456' with stage 'prod'

Solution

  1. Step 1: Analyze the command parameters

    The command is create-stage with parameters for API ID, stage name, and deployment ID.

  2. Step 2: Understand the effect of create-stage

    This creates a new stage named 'prod' that points to the deployment 'dep456' for the API 'abc123'.

  3. Final Answer:

    Creates a new stage 'prod' linked to deployment 'dep456' for API 'abc123' -> Option B

  4. Quick Check:

    create-stage + deployment-id = new stage linked to deployment [OK]
Hint: create-stage links stage to deployment by deployment-id [OK]
Common Mistakes:
  • Confusing stage creation with deployment creation
  • Thinking it deletes or updates instead
  • Mixing up stage name and deployment ID
4. You ran this command to deploy your API stage:
aws apigateway create-stage --rest-api-id abc123 --stage-name test --deployment-id dep789
But you get an error saying the deployment ID does not exist. What is the likely cause?
medium
A. The deployment ID 'dep789' was not created before creating the stage
B. The stage name 'test' is invalid
C. The rest-api-id 'abc123' is incorrect format
D. You must create the stage before creating the deployment

Solution

  1. Step 1: Understand the dependency between deployment and stage

    A stage must point to an existing deployment. If deployment ID does not exist, stage creation fails.

  2. Step 2: Identify the error cause

    The error indicates deployment 'dep789' was not created or is invalid before stage creation.

  3. Final Answer:

    The deployment ID 'dep789' was not created before creating the stage -> Option A

  4. Quick Check:

    Stage needs existing deployment ID [OK]
Hint: Create deployment before stage with deployment ID [OK]
Common Mistakes:
  • Assuming stage name format causes error
  • Thinking API ID format is the issue
  • Believing stage must be created before deployment
5. You want to deploy a new version of your API to a 'prod' stage without affecting the current live API. Which sequence of AWS CLI commands should you use?
hard
A. aws apigateway create-deployment -> aws apigateway create-stage with 'prod'
B. aws apigateway create-stage with 'prod' -> aws apigateway create-deployment
C. aws apigateway create-deployment -> aws apigateway update-stage with 'prod'
D. aws apigateway update-stage with 'prod' -> aws apigateway create-deployment

Solution

  1. Step 1: Deploy new API version

    First, create a new deployment to capture the latest API changes.

  2. Step 2: Update existing 'prod' stage to point to new deployment

    Use update-stage to switch the 'prod' stage to the new deployment without creating a new stage.

  3. Final Answer:

    aws apigateway create-deployment -> aws apigateway update-stage with 'prod' -> Option C

  4. Quick Check:

    Deploy then update stage to switch versions [OK]
Hint: Create deployment then update existing stage [OK]
Common Mistakes:
  • Creating a new stage instead of updating existing
  • Updating stage before deployment exists
  • Assuming create-stage can update existing stage
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