I'm trying to retrieve Secret Value from AWS Secret Manager using aws-sdk for Javascript, I'm using the code snippet provided by Secret Manager, I have included this code in Lambda function, but I can't see any console logs defined inside the callback function. Here's the lambda code:
exports.handler = async (event, context) => {
const AWS = require('aws-sdk');
const client = new AWS.SecretsManager({ region: "eu-west-2" });
let secret;
let decodedBinarySecret;
console.log('STARTED');
client.getSecretValue({ SecretId: "MagellanDev" }, function (err, data) {
if (err) {
console.log('Got Error: ', err.code);
throw err;
}
else {
if ('SecretString' in data) {
secret = data.SecretString;
} else {
let buff = new Buffer(data.SecretBinary, 'base64');
decodedBinarySecret = buff.toString('ascii');
}
}
console.log("SECRET: ", secret);
console.log("DECODEBINARYSECRET: ", decodedBinarySecret)
});
console.log('ended');
};
Output:
Started
ended
The problem is that you have specified the function handler as async. If you want to use callbacks, then use the older style function handler:
exports.handler = function(event, context, callback) {
// ...
}
The code has exited before the getSecretValue() function has completed and had a chance to make the callback. And because your function is async and you did not return a Promise, the Lambda runtime is not waiting.
I would move away from the older callback-style code and move to the newer async/await-style code, for example:
const AWS = require('aws-sdk');
const client = new AWS.SecretsManager({region: 'us-east-1'});
exports.handler = async (event, context) => {
const params = {SecretId: secretName};
return client.getSecretValue(params).promise();
};