AWS Lambda example

A small lambda function that simulates a heavy I/O operation ~150ms duration.

It would use an Application Load Balancer that will trigger lambda functions in 2 AWS AZs.

Requirements

Create a lambda functions on AWS: GO 1.x runtime, from scratch called "echoMock". Leave the Handler: hello
Edit the lamda function, add the "Application Load Balancer" from the left trigger list and press "create new". Use the following parameters:
- Name: hello-mock
- internet facing with HTTP 80 listener
- choose 2 random AZ zones
- reuse or create a new security group that has the TCP 80 open port for all sources
- Routing: echoMock with Lambda Function
- Register targets: "echoMock" Lambda function with $LATEST version
- get the DNS name for the APP Load Balancer from the EC2/Load Balancer page, eg: "hello-mock-157433221.eu-west-3.elb.amazonaws.com"
- wait until you will get a response from
```
curl http://hello-mock-157433221.eu-west-3.elb.amazonaws.com
```
Hello from Lambda!

See the lambda info:

aws lambda get-function --function-name echoMock --region eu-west-3

After building the Go binary we can use the lambda update-function-code command to upload it. See the script:

./publish.sh [function-name] [aws-region]