sls change

Author: wtao

backend/README.md

@@ -0,0 +1,19 @@
+# serverless to AWS lambda
+
+## AWS setup
+
+you will need an aws api gateway and a new aws lambda function to begin with
+
+the index-sls.mjs is your lambda function's entry point
+
+when you create a new route in api gateway, don't know why, the full stage name and the route name of the api gateway need to be baked into the index-sls.mjs's app.all(`route`)
+
+## build and deploy
+
+```bash
+sls package
+
+aws s3 cp ./serverless/lambda-mongo-grafana.zip s3://[bucket name]/[path key]
+
+aws lambda update-function-code --function-name [your lambda name] --s3-bucket [bucket name] --s3-key [path key] --region [region of your lambda]
+```

backend/index-sls.mjs

@@ -5,11 +5,18 @@ import { dbConfig, dbQuery } from "./express.mjs";
 const app = express();
 app.use(express.json());
 
+// don't know why, but once deployed to an aws api gateway
+// the full stage+route name, /[aws api gateway stage name]/[aws api gateway route name],
+// is required for express.js to route properly
+// e.g.
+// /default/mongo
+const awsApiGatewayRoute = "";
+
 // grafana: test datasource connect
-app.all("/", dbConfig);
+app.all(`${awsApiGatewayRoute}/`, dbConfig);
 
 // grafana: qeury
-app.all("/query", dbQuery);
+app.all(`${awsApiGatewayRoute}/query`, dbQuery);
 
 //default error handler
 app.use((err, req, res, next) => {