AWS Lambda
AWS Lambda integration for Meteor Apps.
Installation
meteor add nodexpert:aws-lambdaDocs
AWS-Lambda package let you use all features of AWS's Lambda SDK with no to little configuration required. You can create, delete or invoke your lambda function using this package from your Meteor application. However, you need to set up few files before using this package which are mentioned in next section.
Prerequisites
You have to set up AWS in your system first. There are many ways to set up AWS SDK in your project but we're going with the easiest one here but you are free to use any other. All methods are on AWS's official documentation.
We suggest you create a shared credentials file with the following text.
[default]
aws_access_key_id = <YOUR_ACCESS_KEY_ID>
aws_secret_access_key = <YOUR_SECRET_ACCESS_KEY>The SDK for JavaScript automatically searches the shared credentials file for credentials when loading. Where you keep the shared credentials file depends on your operating system:
- Linux users: ~/.aws/credentials
- Windows users: C:\Users\USER_NAME.aws\credentials
For more deatils refer this documentation.
We suggested this method because once created, this file will be used by AWS's SDK for every project.
Next, you need to create a settings file in your Meteor app. If you don't have one or don't know how to create it, please follow this amazing guide.
Once you have created this, you can add following content in your settings file,
"AWS" : {
"region": "<YOUR_REGION>"
}If you don't provide this object in your settings then this package will throw an error on the server and stops the rest of flow.
That's it, now you're ready to use every function of AWS Lambda SDK.
Usage
- Create a Lambda Function
For this you need code of Lambda function saved in AWS S3 bucket or you can create a function from their dashboard too.
const params = {
Code: { /* required */
S3Bucket: 'STRING_VALUE',
S3Key: 'STRING_VALUE',
S3ObjectVersion: 'STRING_VALUE',
ZipFile: new Buffer('...') || 'STRING_VALUE'
},
FunctionName: '<AWS_LAMBDA_FUNCTION_NAME>' /* required */
Handler: 'STRING_VALUE', /* required */
Role: 'STRING_VALUE', /* required */
Runtime: 'nodejs | nodejs4.3 | java8 | python2.7 | dotnetcore1.0 | nodejs4.3-edge', /* required */
DeadLetterConfig: {
TargetArn: 'STRING_VALUE'
},
Description: 'STRING_VALUE',
Environment: {
Variables: {
someKey: 'STRING_VALUE',
/* anotherKey: ... */
}
},
KMSKeyArn: 'STRING_VALUE',
MemorySize: 0,
Publish: true || false,
Timeout: 0,
VpcConfig: {
SecurityGroupIds: [
'STRING_VALUE',
/* more items */
],
SubnetIds: [
'STRING_VALUE',
/* more items */
]
}
};
AWSLambda.createFunction(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
});- Get a Lambda Function
const params = {
FunctionName: '<AWS_LAMBDA_FUNCTION_NAME>', /* required */
Qualifier: '<OUALIFIER_NAME>'
};
AWSLambda.getFunction(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
});- Invoke a Lambda Function
const params = {
FunctionName: '<AWS_LAMBDA_FUNCTION_NAME>', /* required */
InvocationType: 'RequestResponse',
Payload: JSON.stringify(<EVENT_OBJECT>)
};
AWSLambda.invoke(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
});- Delete a Lambda Function
const params = {
FunctionName: '<AWS_LAMBDA_FUNCTION_NAME>', /* required */
Qualifier: '<AWS_LAMBDA_QUALIFIER_NAME>'
};
AWSLambda.deleteFunction(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
});- Create an alias
const params = {
FunctionName: '<AWS_LAMBDA_FUNCTION_NAME>', /* required */
FunctionVersion: '<AWS_LAMBDA_FUNCTION_VERSION>', /* required */
Name: '<AWS_LAMBDA_ALIAS_NAME>', /* required */
Description: '<AWS_LAMBDA_ALIAS_DESC>'
};
AWSLambda.createAlias(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
});- Get an alias
const params = {
FunctionName: '<AWS_LAMBDA_FUNCTION_NAME>', /* required */
Name: '<AWS_LAMBDA_ALIAS_NAME>' /* required */
};
AWSLambda.getAlias(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
});- Delete an alias
const params = {
FunctionName: '<AWS_LAMBDA_FUNCTION_NAME>', /* required */
Name: '<AWS_LAMBDA_ALIAS_NAME>' /* required */
};
AWSLambda.deleteAlias(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
});
