我如何将 aws secret manager 与 nodejs lambda 一起使用

Question

我尝试包装示例代码片段以获取函数中的秘密，然后调用它，但它似乎没有工作。我怀疑我正在异步调用它并且我需要同步调用它？我只想要一个我可以调用的函数来获取一个秘密值并将其放入一个变量中。

这是函数：

//outside exports.handler = (event, context, callback) => {
function getSecret(secretName) {
  // Load the AWS SDK
  var AWS = require('aws-sdk'),
      region = process.env.AWS_REGION,
      secretName = secretName,
      secret,
      decodedBinarySecret;

  // Create a Secrets Manager client
  var client = new AWS.SecretsManager({
      region: region
  });

  // In this sample we only handle the specific exceptions for the 'GetSecretValue' API.
  // See https://docs.aws.amazon.com/secretsmanager/latest/apireference/API_GetSecretValue.html
  // We rethrow the exception by default.

  client.getSecretValue({SecretId: secretName}, function(err, data) {
      if (err) {
          if (err.code === 'DecryptionFailureException')
              // Secrets Manager can't decrypt the protected secret text using the provided KMS key.
              // Deal with the exception here, and/or rethrow at your discretion.
              throw err;
          else if (err.code === 'InternalServiceErrorException')
              // An error occurred on the server side.
              // Deal with the exception here, and/or rethrow at your discretion.
              throw err;
          else if (err.code === 'InvalidParameterException')
              // You provided an invalid value for a parameter.
              // Deal with the exception here, and/or rethrow at your discretion.
              throw err;
          else if (err.code === 'InvalidRequestException')
              // You provided a parameter value that is not valid for the current state of the resource.
              // Deal with the exception here, and/or rethrow at your discretion.
              throw err;
          else if (err.code === 'ResourceNotFoundException')
              // We can't find the resource that you asked for.
              // Deal with the exception here, and/or rethrow at your discretion.
              throw err;
      }
      else {
          // Decrypts secret using the associated KMS CMK.
          // Depending on whether the secret is a string or binary, one of these fields will be populated.
          if ('SecretString' in data) {
              return data.SecretString;
          } else {
              let buff = new Buffer(data.SecretBinary, 'base64');
              return buff.toString('ascii');
          }
    }
  });
}

那我叫它

// inside exports.handler = (event, context, callback) => {
var secret = getSecret('mySecret')
console.log('mysecret: ' + secret )

秘密变量总是undefined

编辑：异步只适用于承诺，所以我不得不让我的函数异步并且 return 一个承诺：

async function mySecrets(secretName) {
    // Load the AWS SDK
    var AWS = require('aws-sdk'),
        region = process.env.AWS_REGION,
        secretName = secretName,
        secret,
        decodedBinarySecret;

    // Create a Secrets Manager client
    var client = new AWS.SecretsManager({
        region: region
    });

    return new Promise((resolve,reject)=>{
        client.getSecretValue({SecretId: secretName}, function(err, data) {

            // In this sample we only handle the specific exceptions for the 'GetSecretValue' API.
            // See https://docs.aws.amazon.com/secretsmanager/latest/apireference/API_GetSecretValue.html
            // We rethrow the exception by default.
            if (err) {
                reject(err);
            }
            else {
                // Decrypts secret using the associated KMS CMK.
                // Depending on whether the secret is a string or binary, one of these fields will be populated.
                if ('SecretString' in data) {
                    resolve(data.SecretString);
                } else {
                    let buff = new Buffer(data.SecretBinary, 'base64');
                    resolve(buff.toString('ascii'));
                }
            }
        });
    });
}

.....
// inside handler
exports.handler = async (event) => {
....
var value = await mySecrets('mysecret')

Answer 1

您需要等待异步调用完成。

在您的主处理程序中，您将拥有如下内容：

// inside your main handler
exports.handler =  async function(event, context) {
    var secret = await getSecret('mySecret')
    console.log('mysecret: ' + secret )

    return ...
    }

Answer 2

我创建了一个同步解决方案，您可以在这里找到它：https://github.com/jwerre/secrets

使用此包，您可以将所有机密加载到特定命名空间内，如下所示：

const config = require('@jwerre/secrets').configSync({
    region: 'us-east-1',
    env: 'production',
    namespace: 'my-namespace',
});

这将检索您的所有机密，这些机密可能不是您想要的。如果你想要一个秘密，你可以这样做：

const config = require('@jwerre/secrets').secretSync({
    region: 'us-west-2'
    id: '/my-co/apis/'
});

Answer 3

aws-sdk 提供了两种从 API 中取回值的方法。您可以使用本机回调机制，如上所示，或者您可以改为在调用链的末尾使用 .promise()，将 API 调用转换为它的 promise 等价物。

例如

const data = await (secretManager.getSecret({ SecretId }).promise();

如果您使用的是 await，那么您的函数必须是 async，所有调用它的函数也是如此，除非他们选择使用 Promise 的 then/catch等

Answer 4

更好的方法是在异步 lambda 函数中执行此操作

示例key:val => password:rootPassword

const secret = await secretClient.getSecretValue({SecretId: 'SecretKeyName'}).promise().then((data) => {
        return JSON.parse(data.SecretString);
})

然后以 secret.password.

的形式访问它

注意：绕过try/catch块自动处理错误。

Answer 5

如果有人需要解决这个问题，这里有一个更简单的例子：

const result = await client
  .getSecretValue({
    SecretId: AWSConfig.secretName,
  })
  .promise();

const parsedResult = JSON.parse(result.SecretString);

Answer 6

有一种更简单的方法可以从秘密管理器中读取它。

let secretManager = new SecretsManager({ region: 'region-name' });
const data = await secretManager.getSecretValue({ SecretId: 'secretid' }).promise();
console.log(`data is: ${JSON.stringify(data)}`);

我如何将 aws secret manager 与 nodejs lambda 一起使用

how do I use aws secret manager with nodejs lambda

javascript

node.js

aws-lambda

aws-secrets-manager