Troubleshoot using Tanzu Application Platform

This topic tells you how to troubleshoot using Tanzu Application Platform (commonly known as TAP).

Use events to find possible causes

Events can highlight issues with components in a supply chain. For example, high occurrences of StampedObjectApplied or ResourceOutputChanged can indicate problems with trashing on a component.

To view the recent events for a workload, run:

kubectl describe workload.carto.run <workload-name> -n <workload-ns>

Missing build logs after creating a workload

Symptom:

You create a workload, but no logs appear when you run:

tanzu apps workload tail workload-name --since 10m --timestamp

Explanation:

Common causes include:

Misconfigured repository
Misconfigured service account
Misconfigured registry credentials

Solution:

To resolve this issue, run:

kubectl get clusterbuilder.kpack.io -o yaml

kubectl get image.kpack.io <workload-name> -o yaml

kubectl get build.kpack.io -o yaml

Workload creation stops responding with "Builder default is not ready" message

Symptom:

You can see the "Builder default is not ready" message in either of two places:

The "Messages" section of the tanzu apps workload get my-app command.
The Supply Chain section of Tanzu Developer Portal.

This message indicates there is something wrong with the Builder (the component that builds the container image for your workload).

Explanation:

This message is typically encountered when the core component of the Builder (kpack) transitions into a bad state.

Although this isn't the only scenario where this can happen, kpack can transition into a bad state when Tanzu Application Platform is deployed to a local kind cluster, and especially when that kind cluster is restarted.

Solution:

Restart kpack by deleting the kpack-controller and kpack-webhook pods in the kpack namespace. Deleting these resources triggers their recreation:
- kubectl delete pods --all --namespace kpack
Verify status of the replacement pods:
- kubectl get pods --namespace kpack
Verify the workload status after the new kpack pods STATUS are Running:
- tanzu apps workload get YOUR-WORKLOAD-NAME

"Workload already exists" error after updating the workload

Symptom:

When you update the workload, you receive the following error:

Error: workload "default/APP-NAME" already exists
Error: exit status 1

Where APP-NAME is the name of the app.

For example, when you run:

tanzu apps workload create tanzu-java-web-app \
--git-repo https://github.com/dbuchko/tanzu-java-web-app \
--git-branch main \
--type web \
--label apps.tanzu.vmware.com/has-tests=true \
--yes

You receive the following error

Error: workload "default/tanzu-java-web-app" already exists
Error: exit status 1

Explanation:

The app is running before performing a Live Update using the same app name.

Solution:

To resolve this issue, either delete the app or use a different name for the app.

Workload creation fails due to authentication failure in Docker Registry

Symptom:

You might encounter an error message similar to the following when creating or updating a workload by using IDE or apps CLI plug-in:

Error: Writing 'index.docker.io/shaileshp2922/build-service/tanzu-java-web-app:latest': Error while preparing a transport to talk with the registry: Unable to create round tripper: GET https://auth.ipv6.docker.com/token?scope=repository%3Ashaileshp2922%2Fbuild-service%2Ftanzu-java-web-app%3Apush%2Cpull&service=registry.docker.io: unexpected status code 401 Unauthorized: {"details":"incorrect username or password"}

Explanation:

This type of error frequently occurs when the URL set for source image (IDE) or --source-image flag (apps CLI plug-in) is not Docker registry compliant.

Solution:

Verify that you can authenticate directly against the Docker registry and resolve any failures by running:
```
docker login -u USER-NAME
```
Verify your --source-image URL is compliant with Docker.

The URL in this example index.docker.io/shaileshp2922/build-service/tanzu-java-web-app includes nesting. Docker registry, unlike many other registry solutions, does not support nesting.
To resolve this issue, you must provide an unnested URL. For example, index.docker.io/shaileshp2922/tanzu-java-web-app

Telemetry component logs show errors fetching the "reg-creds" secret

Symptom:

When you view the logs of the tap-telemetry controller by running kubectl logs -n tap-telemetry <tap-telemetry-controller-<hash> -f, you see the following error:

"Error retrieving secret reg-creds on namespace tap-telemetry","error":"secrets \"reg-creds\" is forbidden: User \"system:serviceaccount:tap-telemetry:controller\" cannot get resource \"secrets\" in API group \"\" in the namespace \"tap-telemetry\""

Explanation:

The tap-telemetry namespace misses a role that allows the controller to list secrets in the tap-telemetry namespace. For more information about roles, see Role and ClusterRole Kubernetes documentation.

Solution:

To resolve this issue, run:

kubectl patch roles -n tap-telemetry tap-telemetry-controller --type='json' -p='[{"op": "add", "path": "/rules/-", "value": {"apiGroups": [""],"resources": ["secrets"],"verbs": ["get", "list", "watch"]} }]'

Debug convention might not apply

Symptom:

If you upgrade from Tanzu Application Platform v0.4, the debug convention can not apply to the app run image.

Explanation:

The Tanzu Application Platform v0.4 lacks SBOM data.

Solution:

Delete existing app images that were built using Tanzu Application Platform v0.4.

Execute bit not set for App Accelerator build scripts

Symptom:

You cannot execute a build script provided as part of an accelerator.

Explanation:

Build scripts provided as part of an accelerator do not have the execute bit set when a new project is generated from the accelerator.

Solution:

Explicitly set the execute bit by running the chmod command:

chmod +x BUILD-SCRIPT-NAME

Where BUILD-SCRIPT-NAME is the name of the build script.

For example, for a project generated from the "Spring PetClinic" accelerator, run:

chmod +x ./mvnw

"No live information for pod with ID" error

Symptom:

After deploying Tanzu Application Platform workloads, Tanzu Developer Portal shows a "No live information for pod with ID" error.

Explanation:

The connector must discover the application instances and render the details in Tanzu Application Platform GUI.

Solution:

Recreate the Application Live View connector pod by running:

kubectl -n app-live-view delete pods -l=name=application-live-view-connector

This allows the connector to discover the application instances and render the details in Tanzu Application Platform GUI.

"image-policy-webhook-service not found" error

Symptom:

When installing a Tanzu Application Platform profile, you receive the following error:

Internal error occurred: failed calling webhook "image-policy-webhook.signing.apps.tanzu.vmware.com": failed to call webhook: Post "https://image-policy-webhook-service.image-policy-system.svc:443/signing-policy-check?timeout=10s": service "image-policy-webhook-service" not found

Explanation:

The "image-policy-webhook-service" service cannot be found.

Solution:

Redeploy the trainingPortal resource.

"Increase your cluster resources" error

Symptom:

You receive an "Increase your cluster's resources" error.

Explanation:

Node pressure can be caused by an insufficient number of nodes or a lack of resources on nodes necessary to deploy the workloads.

Solution:

Follow instructions from your cloud provider to scale out or scale up your cluster.

CrashLoopBackOff from password authentication fails

Symptom:

SCST - Store does not start. You see the following error in the metadata-store-app Pod logs:

$ kubectl logs pod/metadata-store-app-* -n metadata-store -c metadata-store-app
...
[error] failed to initialize database, got error failed to connect to `host=metadata-store-db user=metadata-store-user database=metadata-store`: server error (FATAL: password authentication failed for user "metadata-store-user" (SQLSTATE 28P01))

Explanation:

The database password has changed between deployments. This is not supported.

Solution:

Redeploy the app either with the original database password or follow the latter steps to erase the data on the volume:

Deploy metadata-store app with kapp.
Verify that the metadata-store-db-* pod fails.
Run:
```
kubectl exec -it metadata-store-db-KUBERNETES-ID -n metadata-store /bin/bash
```
Where KUBERNETES-ID is the ID generated by Kubernetes and appended to the pod name.
To delete all database data, run:
```
rm -rf /var/lib/postgresql/data/*
```
This is the path found in postgres-db-deployment.yaml.
Delete the metadata-store app with kapp.
Deploy the metadata-store app with kapp.

Password authentication fails

Symptom:

SCST - Store does not start. You see the following error in the metadata-store-app pod logs:

$ kubectl logs pod/metadata-store-app-* -n metadata-store -c metadata-store-app
...
[error] failed to initialize database, got error failed to connect to `host=metadata-store-db user=metadata-store-user database=metadata-store`: server error (FATAL: password authentication failed for user "metadata-store-user" (SQLSTATE 28P01))

Explanation

The database password has changed between deployments. This is not supported.

Solution:

Redeploy the app either with the original database password or follow the latter steps to erase the data on the volume:

Deploy metadata-store app with kapp.
Verify that the metadata-store-db-* pod fails.
Run:
```
kubectl exec -it metadata-store-db-KUBERNETES-ID -n metadata-store /bin/bash
```
Where KUBERNETES-ID is the ID generated by Kubernetes and appended to the pod name.
To delete all database data, run:
```
rm -rf /var/lib/postgresql/data/*
```
This is the path found in postgres-db-deployment.yaml.
Delete the metadata-store app with kapp.
Deploy the metadata-store app with kapp.

`metadata-store-db` pod fails to start

Symptom:

When SCST - Store is deployed, deleted, and then redeployed, the metadata-store-db pod fails to start if the database password changed during redeployment.

Explanation:

The persistent volume used by PostgreSQL retains old data, even though the retention policy is set to DELETE.

Solution:

Redeploy the app either with the original database password or follow the later steps to erase the data on the volume:

Deploy metadata-store app with kapp.
Verify that the metadata-store-db-* pod fails.
Run:
```
kubectl exec -it metadata-store-db-KUBERNETES-ID -n metadata-store /bin/bash
```
Where KUBERNETES-ID is the ID generated by Kubernetes and appended to the pod name.
To delete all database data, run:
```
rm -rf /var/lib/postgresql/data/*
```
This is the path found in postgres-db-deployment.yaml.
Delete the metadata-store app with kapp.
Deploy the metadata-store app with kapp.

Missing persistent volume

Symptom:

After SCST - Store is deployed, metadata-store-db pod fails for missing volume while postgres-db-pv-claim pvc is in the PENDING state.

Explanation:

The cluster where SCST - Store is deployed does not have storageclass defined. The provisioner of storageclass is responsible for creating the persistent volume after metadata-store-db attaches postgres-db-pv-claim.

Solution:

Verify that your cluster has storageclass by running:
```
kubectl get storageclass
```

Create a storageclass in your cluster before deploying SCST - Store. For example:

# This is the storageclass that Kind uses
kubectl apply -f https://raw.githubusercontent.com/rancher/local-path-provisioner/master/deploy/local-path-storage.yaml

# set the storage class as default
kubectl patch storageclass local-path -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

Failure to connect Tanzu CLI to AWS EKS clusters

Symptom:

When using the Tanzu CLI to connect to AWS EKS clusters, you might see one of the following errors:

Error: Unable to connect: connection refused. Confirm kubeconfig details and try again
invalid apiVersion "client.authentication.k8s.io/v1alpha1"

Explanation:

The cause is Kubernetes v1.24 dropping support for client.authentication.k8s.io/v1alpha1. For more information, see aws/aws-cli/issues/6920 in GitHub.

Solution:

Follow these steps to update your aws-cli to a supported v2.7.35 or later, and update the kubeconfig entry for your EKS clusters:

Update aws-cli to the latest version. For more information see AWS documentation.

Update the kubeconfig entry for your EKS clusters:

aws eks update-kubeconfig --name ${EKS_CLUSTER_NAME} --region ${REGION}

In a new terminal window, run a Tanzu CLI command to verify the connection issue is resolved. For example:
```
tanzu apps workload list
```
Expect the command to execute without error.

Invalid repository paths are propagated

Symptom:

When inputting shared.image_registry.project_path, invalid repository paths are propagated.

Explanation:

The key shared.image_registry.project_path, which takes input as SERVER-NAME/REPO-NAME, cannot take "/" at the end of the string.

Solution:

Do not append "/" to the end of the string.

x509: certificate signed by unknown authority

Explanation:

Tanzu Application Platform v1.4 introduces Shared Ingress Issuer to secure ingress communication by default. The Certificate Authority for Shared Ingress Issuer is generated as self-signed. As a result, you might see one of the following errors:

connection refused
x509: certificate signed by unknown authority

Solution:

You can choose one of the following options to mitigate the issue:

Option 1: Configure the Shared Ingress Issuer's Certificate Authority as a trusted Certificate Authority

Important This is the recommended option for a secure instance.

Follow these steps to trust the Shared Ingress Issuer's Certificate Authority in Tanzu Application Platform:

Extract the ClusterIssuer's Certificate Authority.

For default installations where ingress_issuer is not set in tap_values.yml, you can extract the ClusterIssuer's Certificate Authority from cert-manager:
```
kubectl get secret tap-ingress-selfsigned-root-ca -n cert-manager -o yaml | yq .data | cut -d' ' -f2 | head -1 | base64 -d
```
If you overrode the default ingress_issuer while installing Tanzu Application Platform, you must refer to your issuer's documentation to extract your ClusterIssuer's Certificate Authority instead of using the command above.
Add the certificate to the list of trusted certificate authorities by appending the certificate authority to the shared.ca_cert_data field in your tap-values.yml.

Reapply your configuration:

tanzu package install tap -p tap.tanzu.vmware.com -v ${TAP_VERSION} --values-file tap-values.yml -n tap-install

Option 2: Deactivate the shared ingress issuer

Important This option is recommended for testing purposes only.

Follow these steps to deactivate TLS for Cloud Native Runtimes, AppSSO and Tanzu Developer Portal:

Set shared.ingress_issuer to "" in your tap-values.yml:
```
shared:
  ingress_issuer: ""
```

Reapply your configuration:

tanzu package install tap -p tap.tanzu.vmware.com -v ${TAP_VERSION} --values-file tap-values.yml -n tap-install

Datadog agent cannot reconcile webhook on AKS

Symptom:

On Azure Kubernetes Service (AKS), you receive an error because the Datadog Cluster Agent cannot reconcile the webhook.

Solution:

Note This workaround deactivates the admission controller, which might have implications for certain features. See the Datadog documentation or contact support for guidance based on your specific use case.

To work around this issue:

Create a custom values file for Datadog named values.yaml.
Enter the following YAML into your values.yaml file, which sets clusterAgent.admissionController to false and sets the environment variable DD_ADMISSION_CONTROLLER_ADD_AKS_SELECTORS to true:
```
clusterAgent:
  admissionController:
    enabled: false
  env:
    - name: "DD_ADMISSION_CONTROLLER_ADD_AKS_SELECTORS"
      value: "true"
```

Install the Datadog Agent Helm chart with your custom values.yaml file:

helm upgrade --install datadog-operator datadog/datadog-operator -f values.yaml

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troubleshoot-using-tap.hbs.md

troubleshoot-using-tap.hbs.md

Troubleshoot using Tanzu Application Platform

Use events to find possible causes

Missing build logs after creating a workload

Workload creation stops responding with "Builder default is not ready" message

"Workload already exists" error after updating the workload

Workload creation fails due to authentication failure in Docker Registry

Telemetry component logs show errors fetching the "reg-creds" secret

Debug convention might not apply

Execute bit not set for App Accelerator build scripts

"No live information for pod with ID" error

"image-policy-webhook-service not found" error

"Increase your cluster resources" error

CrashLoopBackOff from password authentication fails

Password authentication fails

Explanation

`metadata-store-db` pod fails to start

Missing persistent volume

Failure to connect Tanzu CLI to AWS EKS clusters

Invalid repository paths are propagated

x509: certificate signed by unknown authority

Option 1: Configure the Shared Ingress Issuer's Certificate Authority as a trusted Certificate Authority

Option 2: Deactivate the shared ingress issuer

Datadog agent cannot reconcile webhook on AKS

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Troubleshoot using Tanzu Application Platform

Use events to find possible causes

Missing build logs after creating a workload

Workload creation stops responding with "Builder default is not ready" message

"Workload already exists" error after updating the workload

Workload creation fails due to authentication failure in Docker Registry

Telemetry component logs show errors fetching the "reg-creds" secret

Debug convention might not apply

Execute bit not set for App Accelerator build scripts

"No live information for pod with ID" error

"image-policy-webhook-service not found" error

"Increase your cluster resources" error

CrashLoopBackOff from password authentication fails

Password authentication fails

Explanation

metadata-store-db pod fails to start

Missing persistent volume

Failure to connect Tanzu CLI to AWS EKS clusters

Invalid repository paths are propagated

x509: certificate signed by unknown authority

Option 1: Configure the Shared Ingress Issuer's Certificate Authority as a trusted Certificate Authority

Option 2: Deactivate the shared ingress issuer

Datadog agent cannot reconcile webhook on AKS

`metadata-store-db` pod fails to start