Deploying AWS Lambda Function Using AWS CLI

#aws #cloud #javascript #serverless

Install AWS CLI and checking whether the AWS CLI version.

https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-install.html

Checking installation success.

After that configure AWS CLI using Access Key ID and Secret Access Key. You can get Access Key ID and Secret Access Key go to AWS Management Console and click user name and go to My Security Credentials and click Access keys. If you haven't access the key you can click create a new access key.

Create a folder and inside this folder create trust-policy.json file.

trust-policy.json
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": "lambda.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}

After that create IAM Role Using the following CLI command.

aws iam create-role --role-name basic-lambda-role --assume-role-policy-document file://trust-policy.json

You can get IAM role details and copy ARN details using the following CLI command.

aws iam get-role --role-name basic-lambda-role

Create basics-lambda.js file and store it previously created folder and zip this file.

basic-lambda.js
exports.handler = async function (event) {
const { numberA, numberB } = event;

return {
sumResult: numberA + numberB,
};
};

ZIP this file like the following.
Ex : basic-lambda-role.zip

After that create a lambda function using following CLI command.

aws lambda create-function \
--function-name basic-lambda \
--runtime nodejs14.x \
--zip-file fileb://basic-lambda-role.zip \
--handler basic-lambda.handler \
--role arn:aws:iam::932747549174:role/basic-lambda-role

You can see following output.