Troubleshooting Apigee logs missing from Cloud Logging

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Symptom

Sending Apigee API logs to Cloud Logging is a common use case. This is generally done through the MessageLogging policy or the ServiceCallout policy. In both cases, Apigee uses the Cloud Logging API to write the logs.

In some cases, you might not see the Apigee API logs in Cloud Logging.

Error message

There is no error message displayed.

Possible Causes

Cause	Description	Troubleshooting instructions applicable for
Cloud Logging API is not enabled	Ensure that you have enabled Cloud Logging API in the Google Cloud project of your Apigee organization.	Apigee and Apigee hybrid
Misconfigured Proxy Service account	The service account used at deploy time (Apigee) or in runtime configuration (Apigee hybrid) may have been deleted/misconfigured.	Apigee and Apigee hybrid
Incorrect project name in policy configuration	The project name in the policy configuration is not the same as the one associated with the Apigee org.	Apigee and Apigee hybrid
Missing roles/permissions for the runtime service account	For Apigee hybrid, make sure that the runtime service account has the Service Account Token Creator role. This is equired to use Google authentication.	Apigee hybrid
Log entry size exceeding the permitted Cloud Logging limit	Cloud Logging has a 256 KB entry size limit which can't be changed.	Apigee and Apigee hybrid
Exhaustion of write requests per minute quota for Cloud Logging API	Make sure that you don't exceed the write requests per minute quota value for cloud logging API in your Google Cloud project.	Apigee and Apigee hybrid

Cause: Cloud Logging API is not enabled

Diagnosis

Verify that the Cloud Logging API is enabled. See List enabled services for instructions on how to list enabled APIs and services in the Google Cloud console.

Resolution

If the Cloud Logging API is not enabled, enable it using the steps in Enabling services. It can take a few minutes to enable the API.

If you cannot resolve the issue where logs are not seen in Cloud Logging due to the Cloud Logging API not being enabled, see Must gather diagnostic information.

Cause: Misconfigured proxy service account

Diagnosis

Apigee

Find the service account name.

Using the Apigee UI:
1. Click Develop > API Proxies and then click on a proxy name. For example, TurboBooks.
2. Under Deployments, the Service Account name is displayed.

Using the Apigee API:

Issue the following Apigee API call:

curl -H "Authorization: Bearer $(gcloud auth print-access-token)" "https://apigee.googleapis.com/v1/organizations/ORG_NAME/environments/ENV_NAME/apis/PROXY_NAME/revisions/REVISION_NUMBER/deployments"

Replace the following:

ORG_NAME: The name of your organization. For example, apigee-example-org.
ENV_NAME: The name of the environment. For example, myenv.
PROXY_NAME: The name of the proxy. For example, TurboBooks.
REVISION_NUMBER: The revision number. For example, 4.

For example:

curl -H "Authorization: Bearer $(gcloud auth print-access-token)" "https://apigee.googleapis.com/v1/organizations/apigee-example-org/environments/myenv/apis/TurboBooks/revisions/4/deployments"

Something similar to the following is returned:

{
  "environment": "myenv",
  "apiProxy": "TurboBooks",
  "revision": "4",
  "deployStartTime": "1687408163394",
  "state": "READY",
  "instances": [
    {
      "instance": "apiginstance",
      "deployedRevisions": [
        {
          "revision": "4",
          "percentage": 100
        }
    .
    .
    .
    .
  "serviceAccount": "projects/-/serviceAccounts/envsa-79@apigee-example-org.iam.gserviceaccount.com"
}

Where serviceAccount is the service account associated with the API proxy.

Verify the following for this proxy service account:
1. This service account must be in the same Google Cloud project that you used to create your Apigee organization. For example, apigee-example-org.
2. The user who deploys the proxy has the iam.serviceAccounts.actAs permission on this service account.
  - For a list of roles, see Service Accounts roles.
  - For instructions on how to view a specific user's roles, see View current access.
3. The proxy service account has permissions needed to to call the Cloud Logging service.
  - For a list of roles, see Logging roles.
  - For instructions on how to view the proxy service account permissions, see View current access.

Apigee hybrid

For Apigee hybrid, in addition to the steps listed in Apigee, open your overrides.yaml file and ensure that there is a service account specified under each environment that requires Google authentication. For example:

envs:
  - name: "ENVIRONMENT_NAME"
    serviceAccountPaths:
      runtime: "KEY_FILE_PATH"

Replace the following:

ENVIRONMENT_NAME: The name of the environment. For example, myenv.
KEY_FILE_PATH: The path to the runtime service account key file. You would have already typically created the service account in Create service accounts during installation.

Resolution

If the service account is not in the same Google Cloud project that you used to create your Apigee organization, then a service account needs to be created in the same Google Cloud project and used. This is also mentioned in Using Google authentication.
If the user who deploys the proxy does not have the iam.serviceAccounts.actAs permission on this service account, see Grant a single role.
If the proxy service account does not have permissions needed to to call the Cloud Logging service, see Grant a single role.

If the steps in this document do not resolve the issue where the proxy service account is configured incorrectly for Apigee and Apigee hybrid, see Must gather diagnostic information.

Cause: Incorrect project name in policy configuration

Diagnosis

If you're using the MessageLogging policy to send logs to Cloud Logging:

In the Apigee UI, click Develop > API Proxies > API proxy name > Develop tab.
In the Code pane, locate the <CloudLogging> element.
Verify that the <LogName> value is the correct project name:
```
<CloudLogging>
  <LogName>projects/PROJECT_ID/logs/LOG_ID</LogName>
</CloudLogging>
```
Replace the following:
- PROJECT_ID: The Google Cloud project ID. For example, apigee-example-org.
- LOG_ID: The Cloud Logging log ID. For example, apigee-logs.

Resolution

If the value in the <LogName> element does not have the correct value, update it to the correct value.

If the steps in this document do not resolve the issue, see Must gather diagnostic information.

Cause: Missing roles/permissions for the runtime service account

Diagnosis

Ensure that the runtime is able to impersonate the proxy service account.

Run the following gcloud command to verify if the runtime service account has the iam.serviceAccountTokenCreator role on the proxy service account:

gcloud iam service-accounts get-iam-policy PROXY_SA_NAME@PROJECT_ID.iam.gserviceaccount.com

Replace the following:

PROXY_SA_NAME: The name of the proxy service account. For example, envsa-79.
PROJECT_ID: The Google Cloud project ID. For example, apigee-example-org.

Something similar to the following is returned:

- members:
  - serviceAccount:RUNTIME_SA_NAME@PROJECT_ID.iam.gserviceaccount.com
  role: roles/iam.serviceAccountTokenCreator

Replace the following:

RUNTIME_SA_NAME: The ID for the runtime service account. For example, apigee-runtime.

For example:

gcloud iam service-accounts get-iam-policy envsa-79@apigee-example-org.iam.gserviceaccount.com
  bindings:
  - members:
    - user:222larabrown@gmail.com
    role: roles/iam.serviceAccountAdmin
  - members:
    - serviceAccount:apigee-runtime@apigee-example-org.iam.gserviceaccount.com
    role: roles/iam.serviceAccountTokenCreator
  - members:
    - user:222larabrown@gmail.com
    role: roles/iam.serviceAccountUser
  etag: BwX-shcrL3o=
  version: 1

If you do not see the iam.serviceAccountTokenCreator role and expected member in the output, then follow the steps in Resolution to grant the correct roles.

Resolution

Grant the runtime service account the iam.serviceAccountTokenCreator role on the proxy service account by running the following gcloud command:

gcloud iam service-accounts add-iam-policy-binding \
PROXY_SA_NAME@PROJECT_ID.iam.gserviceaccount.com \
--member=serviceAccount:RUNTIME_SA_NAME@PROJECT_ID.iam.gserviceaccount.com \
--role=roles/iam.serviceAccountTokenCreator

Replace the following:

PROXY_SA_NAME: The name of the proxy service account. For example, envsa-79.
PROJECT_ID: The Google Cloud project ID. For example, apigee-example-org.
RUNTIME_SA_NAME: The ID for the runtime service account. For example, apigee-runtime.

If the steps in this document do not resolve the issue, see Must gather diagnostic information.

Cause: Log entry size exceeding the permitted logging limit

Diagnosis

If you do not see some of the logs showing up in Cloud Logging after ensuring the other causes described in this document are not the issue, then it is possible that the size of some of the log entries sent from Apigee exceeds 256 KB which is the hard limit for a log size entry on Cloud Logging. See Logging usage limits for more information.

Resolution

This is a non-configurable limit set on Cloud Logging and the only workaround known currently is to keep the log entry size sent from Apigee under 256 KB. If you are logging payload that has the potential to go above this limit, either do not log this payload, or understand that some transactions will not be logged once the limit is reached.

If the steps in this document do not resolve the issue, see Must gather diagnostic information.

Cause: Exhaustion of write requests per minute quota for Cloud Logging API

Diagnosis

Sometimes customers experience that they are able to see the request in the debug session, while at the same time, the request is not getting logged into the logs explorer, despite being present in the Load Balancer logs.

The observed message loss could be attributed to quota exhaustion within the project. The Cloud Logging API enforces a rate limit of 120,000 write requests per minute. Exceeding this quota may result in message drops.For more information, see View and manage quotas.

These quotas can be increased within the Google Cloud Console and this can be done by the customer itself by following the quota increase documentation.

Resolution

Follow below procedure to increase a quota;

In the Quotas page use the checkboxes to select Cloud Logging API, and then click Edit quotas. If you get an error Edit is not allowed for this quota, you can contact Google Cloud Customer Care to request changes to the quota. Note also that billing must be enabled on the Google Cloud project to click the checkboxes.
In the Quota changes panel, select the service to expand the view and then fill in the New limit and Request description fields. Click Next.
Complete the form in the Contact details panel and Click Submit request.

For more information checkout this documentation for Quotas and limits.

Must gather diagnostic information

If the problem persists even after following the above instructions, gather the following diagnostic information and then contact Google Cloud Customer Care:

Apigee organization.
Environment and API proxy seeing the issue.
Downloaded debug session (this will provide all the above info).
The specific policy name in the API proxy which is sending logs to Cloud Logging.
For Apigee hybrid: The overrides.yaml file.