The Serverless Application contains two functions:

• ScraperFunction (scrapes instagram profile page and saves followers count in DynamoDB table)
• DrawingFunction (draws the line chart which displays information about followers count over time; saves it on S3 bucket as public available object)

Each of them is scheduled to run once a day and triggered by CloudWatch Event.

• AWS CLI already configured with at least PowerUser permission
• AWS SAM installed
• Docker installed
• Golang (v1.12)

You need to have DynamoDB local](https://hub.docker.com/r/amazon/dynamodb-local).

docker run -d -p 8000:8000 amazon/dynamodb-local

SAM local doesn't evaluate CloudFormation conditionals so you must create DynamoDB Tables by yourself:

aws dynamodb create-table \
  --endpoint-url http://localhost:8000 \
  --table-name logs-table \
  --attribute-definitions \
    AttributeName=time,AttributeType=S \
    AttributeName=username,AttributeType=S \
  --key-schema \
    AttributeName=username,KeyType=HASH \
    AttributeName=time,KeyType=RANGE \
  --provisioned-throughput \
    ReadCapacityUnits=1,WriteCapacityUnits=1

aws dynamodb list-tables --endpoint-url http://localhost:8000

make build && sam local invoke ScraperFunction --log-file ./out.log --env-vars env.json --no-event

Project contains the Makefile which you could use for several common tasks after customisation.

make deploy