welshstew / middleware-day-may-2021

Middleware Day 14/05/2021 : Serverless on AWS + some Knative

• Overview of Serverless/Lambda
• Creating function via the console
• function via SAM (and invoking locally)
• lambda - BYO container
• function via Serverless + Serverless Examples
• AWS API Gateway -> Lambda -> DynamoDB -> DynamoDB Streams -> Knative pod on Openshift

BYO Container...

Doc in the directory

Knative / Pods on Openshift

See the sample-helm-chart here, and the code is as nodejs-mongodb-crud-api

#login to your cluster
oc new-project serverless-demo
helm install tutorial1 ./sample-helm-chart/tutorial-crud-api
#later...
oc create -f ./nodejs-mongodb-crud-api/knative-service.yaml

Note that the IP address / service name is no longer injected into the container (strange!). So we need to ensure:

...
      containers:
        - image: quay.io/swinches/tutorial-crud-api:latest
          env:
          - name: DATABASE_SERVICE_NAME
            value: tutorial1-tutorial-crud-api-mongo
          - name: TUTORIAL1_TUTORIAL_CRUD_API_MONGO_SERVICE_HOST
            value: 172.30.242.244
          - name: MONGODB_USER
            valueFrom:
              secretKeyRef:
...

Nice Links:

• Serverless examples: https://github.com/serverless/examples
• FooBar serverless: https://www.youtube.com/channel/UCSLIvjWJwLRQze9Pn4cectQ
• Lego serverless: https://www.youtube.com/watch?v=HcbnrJdNBRI
• DynamoDB advanced design patterns: https://www.youtube.com/watch?v=HaEPXoXVf2k
• Aurora Serverless: https://aws.amazon.com/rds/aurora/serverless/
• Serverless Handbook: https://serverlesshandbook.dev