Secret manager access denied despite correct roles for service account

HTTP cloud function code:

const { SecretManagerServiceClient } = require('@google-cloud/secret-manager');

const secretManagerServiceClient = new SecretManagerServiceClient();
const name = 'projects/shadowsocks-218808/secrets/workflow/versions/latest';

exports.testSecretManager = async (req, res) => {
  const [version] = await secretManagerServiceClient.accessSecretVersion({ name });
  const payload = version.payload.data.toString();
  console.debug(`Payload: ${payload}`);
  res.sendStatus(200);
};

Deploy:

gcloud functions deploy testSecretManager --runtime nodejs10 --trigger-http --allow-unauthenticated

Deploying function (may take a while - up to 2 minutes)...done.                                                                                                                                                                                                                        
availableMemoryMb: 256
entryPoint: testSecretManager
httpsTrigger:
  url: https://us-central1-shadowsocks-218808.cloudfunctions.net/testSecretManager
ingressSettings: ALLOW_ALL
labels:
  deployment-tool: cli-gcloud
name: projects/shadowsocks-218808/locations/us-central1/functions/testSecretManager
runtime: nodejs10
serviceAccountEmail: [email protected]
sourceUploadUrl: https://storage.googleapis.com/gcf-upload-us-central1-43476143-b555-4cb2-8f6f-1b2d1952a2d7/42c4cda4-98a8-4994-a3be-d2203b9e646a.zip?GoogleAccessId=service-16536262744@gcf-admin-robot.iam.gserviceaccount.com&Expires=1596513795&Signature=kbLw5teN8EoYmj4fEweKKiIaakxcrhlUg2GGHV4jWJjvmeEfXePpRNOn9yz2zLn%2Fba0UqM9qdJMXujs5afBk%2BVBmywPEiptAZe2qgmldpr%2BsYejFu0woNgsPHVqtJ0NoWDo6W2dq4CuNNwO%2BaQ89mnhahUUQTInkJ55Y3wCIe9smk%2BqWtcvta3zICiToA7RQvPKY5MS6NViyj5mLxuJtDlTY9IKPL%2BqG6JAaQJSFYKYVgLyb6JfirXk8Q7%2FMvnHPpXPlhvsBLQksbF6jDPeefp2HyW4%2FSIQYprfpwKV3hlEIQyRQllz5J9yF83%2FxDPh%2BQPc5QmswKP5XAvYaszJPEw%3D%3D
status: ACTIVE
timeout: 60s
updateTime: '2020-08-04T03:34:32.665Z'
versionId: '2'

Test:

gcloud functions call testSecretManager --data '{}'

Got error same as you:

error: |-
  Error: function terminated. Recommended action: inspect logs for termination reason. Details:
  7 PERMISSION_DENIED: Permission 'secretmanager.versions.access' denied for resource 'projects/shadowsocks-218808/secrets/workflow/versions/latest' (or it may not exist).

solution:

You can find the serviceAccountEmail: [email protected] from the deployment information details of cloud function.

go to IAM & Admin web UI, click ADD ANOTHER ROLE button, add Secret Manager Secret Accessor role to this service account.

Test again:

> gcloud functions call testSecretManager --data '{}'

executionId: 1tsatxl6fndw
result: OK

Read the logs for testSecretManager cloud function:

gcloud functions logs read testSecretManager

You will see the logs for the secret payload string.

I had the same issue and to solve it, I just had to:

1. Find the Service Account under General of my Google Cloud Function.

   It looked like <project-name>@appspot.gserviceaccount.com

2. In IAM Admin, Add Secret Manager Secret Accessor Role to this Service Account.

After this, everything worked!

I have had similar issues working with secretmanager and the python google-cloud-secretmanager library (2.4). Specifically, after creating a secret and giving my service account the secretmanager.secretAccessor role on this secret (and nothing else, following the principle of least privilege), I was getting the following error when trying to access it:

details = "Permission 'secretmanager.versions.access' denied for resource 'projects/projectid/secrets/keyname/versions/latest' (or it may not exist)."

I could only make it work by also adding the secretmanager.viewer role at the project level, which as far as I can tell is not described in the documentation.