eddmann · November 3, 2017 15:32 · Nov 3, 2017
diff --git a/modify-ec2-instance-type.js b/modify-ec2-instance-type.js
@@ -0,0 +1,19 @@
+// Demonstration video can be found at: https://youtu.be/_gJyK1-NGq8
+
+// ModifyEC2InstanceType
+
+const AWS = require('aws-sdk');
+
+exports.handler = (event, context, callback) => {
+    const { instanceId, instanceRegion, instanceType } = event;
+
+    const ec2 = new AWS.EC2({ region: instanceRegion });
+
+    Promise.resolve()
+        .then(() => ec2.stopInstances({ InstanceIds: [instanceId] }).promise())
+        .then(() => ec2.waitFor('instanceStopped', { InstanceIds: [instanceId] }).promise())
+        .then(() => ec2.modifyInstanceAttribute({InstanceId: instanceId, InstanceType: { Value: instanceType } }).promise())
+        .then(() => ec2.startInstances({ InstanceIds: [instanceId] }).promise())
+        .then(() => callback(null, `Successfully modified ${event.instanceId} to ${event.instanceType}`))
+        .catch(err => callback(err));
+};