Merge pull request #139 from alexcasalboni/sdk-dependency

Add explicit SDK dependency as Lambda Layer

.gitignore

@@ -16,3 +16,5 @@ serverless.yml
 
 .idea/
 .vscode/
+
+layer-sdk/src

README-DEPLOY.md

@@ -36,14 +36,20 @@ Now, you can clone this repository as follows:
 $ git clone https://github.com/alexcasalboni/aws-lambda-power-tuning.git
 ```
 
-Configure your deployment bucket name ([create one first!](https://docs.aws.amazon.com/AmazonS3/latest/user-guide/create-bucket.html)) and stack name in the deployment script:
+Configure your deployment bucket name ([create one first!](https://docs.aws.amazon.com/AmazonS3/latest/user-guide/create-bucket.html)) and stack name in `scripts/deploy.sh`:
 
 
 ```bash
 # config
 BUCKET_NAME=your-sam-templates-bucket
 STACK_NAME=lambda-power-tuning
-PowerValues='128,512,1024,1536,3008'
+# more config parameters are available too!
+```
+
+Build the SDK layer as follows:
+
+```bash
+$ bash scripts/build-layer.sh
 ```
 
 You can finally deploy the serverless app:

layer-sdk/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "aws-sdk-layer",
+  "version": "1.0.0",
+  "description": "A layer used by Lambda functions in this project.",
+  "author": "Alex Casalboni <alex@alexcasalboni.com>",
+  "licence": "MIT-0",
+  "scripts": {},
+  "dependencies": {
+    "aws-sdk": "^2.989.0"
+  }
+}

package.json

@@ -29,7 +29,7 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "aws-sdk": "^2.945.0",
+    "aws-sdk": "^2.989.0",
     "aws-sdk-mock": "^5.2.1",
     "coveralls": "^3.0.3",
     "eslint": "^6.1.0",

scripts/build-layer.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# make sure we're working on the layer folder
+cd layer-sdk
+
+# create subfolders
+## ./src is referenced by the LayerVersion resource (.gitignored)
+## ./src/nodejs will contain the node_modules
+mkdir -p ./src/nodejs
+
+# install layer dependencies (the SDK)
+npm i
+
+# clean up previous build ...
+rm -rf ./src/nodejs/node_modules
+
+# ... and move everything into the layer sub-folder
+mv ./node_modules ./src/nodejs

template.yml

@@ -59,11 +59,24 @@ Globals:
 
 Resources:
 
+  SDKlayer:
+    Type: AWS::Serverless::LayerVersion
+    Properties:
+      LayerName: AWS-SDK-v2_989_0
+      Description: AWS SDK 2.989.0
+      ContentUri: ./layer-sdk/src
+      CompatibleRuntimes:
+        - nodejs14.x
+      LicenseInfo: 'Available under the MIT-0 license.'
+      RetentionPolicy: Retain
+
   initializer:
     Type: AWS::Serverless::Function
     Properties:
       CodeUri: lambda
       Handler: initializer.handler
+      Layers:
+        - !Ref SDKlayer
       Policies:
         - AWSLambdaExecute # Managed Policy
         - Version: '2012-10-17' # Policy Document
@@ -83,6 +96,8 @@ Resources:
     Properties:
       CodeUri: lambda
       Handler: executor.handler
+      Layers:
+        - !Ref SDKlayer
       Policies:
         - AWSLambdaExecute # Managed Policy
         - Version: '2012-10-17' # Policy Document
@@ -97,6 +112,8 @@ Resources:
     Properties:
       CodeUri: lambda
       Handler: cleaner.handler
+      Layers:
+        - !Ref SDKlayer
       Policies:
         - AWSLambdaExecute # Managed Policy
         - Version: '2012-10-17' # Policy Document
@@ -122,6 +139,8 @@ Resources:
     Properties:
       CodeUri: lambda
       Handler: optimizer.handler
+      Layers:
+        - !Ref SDKlayer
       Policies:
         - AWSLambdaExecute # Managed Policy
         - Version: '2012-10-17' # Policy Document