lambda handlers

Multiple lambda packaged in one docker image, and to create multiple lambda handlers:

Lambda functions

feat(lambda): multiple lambda handlers in one repo

• refresh-search-index (include search_index.{article,user,tag})
• check-motor-badge
• sendmail
• ipns-listener
• user-retention
• likecoin
• cloudflare-image-stats-alert (not using docker, copy the source code to lambda to deploy)
• sync-ga4-data
• archive-user
• daily-summary-email
• notification

Dependencies

use docker image for lambda, instead of zip packages:

• share lib code for multiple lambda in one place;
• handle dependencies better (ipfs-http-client, opencc, etc);
• can use latest node-v18 & typescript together, (many other tools have failed)

Development

Setup

• Pull submodule: git submodule update --init
• Install deps: npm install . && npm run prepare

Format & Lint & Test

• Run format: npm run format
• Run lint: npm run lint
• Run test cases: npm run test

Deployment

merge to main will trigger build docker image and publish to ECR registry, with version like:

<account>.dkr.ecr.ap-southeast-1.amazonaws.com/lambda-handlers-image:v0.1.0

Tips: at development phase, can also manually run docker build -t {above-full-image}:v{date-tag} ., do a login aws ecr get-login-password --region ap-southeast-1 | docker login --username AWS --password-stdin <account>.dkr.ecr.ap-southeast-1.amazonaws.com first, and push it with docker image push {above-full-image}:v{date-tag}, test it with manually update lambda function image;

Create new lambda worker:

1. create handler entry code in ./handlers/<new-lambda>.ts, export the handler;
2. create a PR and after merged, the CI will build and publish to ECR registry: <account>.dkr.ecr.ap-southeast-1.amazonaws.com/lambda-handlers-image:v<new-version>
3. from AWS Lambda Console, create the lambda function from docker image, use above full image_uri, fill the handler CMD as <new-lambda>.handler;
4. in AWS Lambda Console, configure s3 or sns or sqs trigger,
   • or for cron job, use EventBridge can generate events at given cron rules;

Can test trigger from the AWS Lambda Console

You can also deploy lambdas and related AWS resources by Cloudformation, see deployment/ folder.

Add manual auto deploy in Github Action:

after first time manually create the Lambda function, all later updates can be done in Action CI: add proper deploy-<new-lambda>-dev deploy-<new-lambda>-prod jobs in .github/workflows/deploy.yml, the deploy-<new-lambda>-dev will be automatically updating the function after each PR merge, and deploy-<new-lambda>-prod will need a manual approval to be deploying.