[英]how do I use aws secret manager with nodejs lambda
我试图包装示例代码片段以获取函数中的秘密,然后调用它,但它似乎不起作用。 我怀疑我是异步调用它,我需要同步调用它? 我只想要一个可以调用的函数来获取一个秘密值并将其放入一个 var 中。
这是功能:
//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');
}
}
});
}
然后我叫它
// 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,所以我必须使我的函数异步并返回一个承诺:
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')
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 ...
}
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);
aws-sdk
提供了两种从 API 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 调用转换为其等效的 promise。
例如
const data = await (secretManager.getSecret({ SecretId }).promise();
如果您正在使用await
那么您的函数需要与调用它的所有函数一样async
,除非他们选择使用 Promise 的then
/ catch
等。
我创建了一个同步解决方案,您可以在这里找到: 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中,如下所示:
const config = require('@jwerre/secrets').configSync({
region: 'us-east-1',
env: 'production',
namespace: 'my-namespace',
});
这将检索您所有可能不完全是您想要的秘密。 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/'
});
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
访问它。
注意:环绕try/catch
块以自动处理错误。
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)}`);
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