Argo CD Application resource drift

Resources in the cluster have drifted from the desired state defined in Git.

Understanding Argo CD

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. It automates the deployment of the desired application states defined in Git repositories to Kubernetes clusters. By continuously monitoring the state of applications, Argo CD ensures that the live state of applications matches the desired state specified in Git.

Identifying Application Resource Drift

One common issue encountered by users of Argo CD is Application Resource Drift. This occurs when resources in the Kubernetes cluster deviate from the desired state defined in the Git repository. Symptoms of this issue include discrepancies between the live state of resources and the state defined in Git, often visible in the Argo CD dashboard.

Symptoms of Resource Drift

  • Argo CD dashboard shows applications in a OutOfSync state.
  • Unexpected changes in application behavior or configuration.
  • Manual changes in the Kubernetes cluster not reflected in Git.

Understanding the Issue

Resource drift is a common challenge in environments where manual changes are made directly to the Kubernetes cluster. These changes can lead to inconsistencies between the live state and the desired state specified in Git. Argo CD detects these discrepancies and flags the application as OutOfSync.

Root Causes of Drift

  • Manual edits to resources in the Kubernetes cluster.
  • Automated processes or scripts altering resources without updating Git.
  • Configuration changes not committed to the Git repository.

Steps to Resolve Application Resource Drift

Resolving resource drift involves reconciling the live state with the desired state. Here are the steps to address this issue:

Step 1: Perform a Manual Sync

To reconcile the differences, perform a manual sync from the Argo CD dashboard:

  1. Navigate to the Argo CD dashboard.
  2. Select the application that is OutOfSync.
  3. Click on the Sync button to initiate a manual sync.

This action will apply the desired state from Git to the Kubernetes cluster, resolving the drift.

Step 2: Investigate Persistent Drift

If the drift persists, further investigation is needed:

  • Check for any automated processes that might be altering resources.
  • Review recent changes in the Git repository for any discrepancies.
  • Ensure all configuration changes are committed to Git.

Preventing Future Drift

To prevent future occurrences of resource drift, consider the following best practices:

  • Adopt a strict GitOps workflow where all changes are made through Git.
  • Implement access controls to prevent unauthorized changes to the cluster.
  • Regularly audit and review changes in both the cluster and Git repository.

For more information on managing application states with Argo CD, visit the official Argo CD documentation.

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MORE ISSUES

Argo CD Argo CD application sync operation cancelled
The sync operation was cancelled due to user intervention or errors.
Argo CD Argo CD application resource not ready
Resources in the application are not in a ready state, preventing successful sync.
Argo CD Argo CD application sync operation timeout
The sync operation timed out due to long-running processes or resource constraints.
Argo CD Argo CD application sync operation failed
The sync operation failed due to errors in the application manifest or resource conflicts.
Argo CD Argo CD application sync operation pending
The sync operation is pending due to resource constraints or configuration issues.
Argo CD Argo CD application sync retry limit exceeded
The application sync process has exceeded the maximum number of retries.
Argo CD Argo CD server high memory usage
High memory usage due to resource-intensive operations or misconfigurations.
Argo CD Argo CD application not syncing
The application is not syncing due to incorrect sync policy or configuration issues.
Argo CD Argo CD application sync failed
The application sync process failed due to errors in the manifest or resource conflicts.
Argo CD Argo CD application controller not running
The application controller is not running due to crashes or configuration issues.
Argo CD Argo CD server disk space full
The disk space on the Argo CD server is full, preventing normal operations.
Argo CD Argo CD application sync hook error
Errors in the sync hooks prevent the application from syncing successfully.
Argo CD Application resource limit exceeded
The application exceeds the resource limits set in the namespace.
Argo CD Argo CD repository cache error
Errors in the repository cache prevent Argo CD from accessing the latest repository state.
Argo CD Git repository webhook secret mismatch
The webhook secret configured in Argo CD does not match the one in the Git repository.
Argo CD Argo CD repository authentication error
Authentication issues prevent Argo CD from accessing the Git repository.
Argo CD Argo CD server certificate expired
The TLS certificate for the Argo CD server has expired.
Argo CD Argo CD application not found
The specified application does not exist in Argo CD.
Argo CD Application resource drift
Resources in the cluster have drifted from the desired state defined in Git.
Argo CD Argo CD CLI authentication error
Authentication issues prevent the CLI from accessing the Argo CD server.
Argo CD Argo CD server memory leak
Memory leak in the Argo CD server due to application bugs or misconfigurations.
Argo CD Argo CD application controller crash
The application controller crashes due to resource constraints or configuration errors.
Argo CD Application sync policy misconfiguration
Incorrect sync policy settings prevent the application from syncing as expected.
Argo CD Argo CD server high CPU usage
High CPU usage due to resource-intensive operations or misconfigurations.
Argo CD Resource deletion error
Resources cannot be deleted due to finalizer issues or dependencies.
Argo CD Argo CD repository certificate error
Certificate issues prevent Argo CD from accessing the Git repository.
Argo CD Application sync timeout
The application sync process takes too long and times out.
Argo CD Users are unable to access Argo CD resources due to permission errors.
Incorrect RBAC settings prevent users from accessing Argo CD resources.
Argo CD Git repository branch not found
The specified branch in the Git repository does not exist.
Argo CD Application health check failed
The application health checks are failing due to misconfigurations or resource issues.
Argo CD Argo CD API rate limit exceeded
Too many API requests are being made, exceeding the rate limit.
Argo CD Webhooks not triggering
Webhooks are not configured correctly or network issues prevent them from reaching Argo CD.
Argo CD Application rollback error
The application cannot be rolled back due to missing previous versions or errors in the rollback process.
Argo CD Invalid SSH key error
The SSH key used for Git repository access is invalid or incorrectly configured.
Argo CD Resource version conflict
Concurrent updates to a resource result in version conflicts.
Argo CD Argo CD UI not loading
Issues with the Argo CD server or frontend service configuration.
Argo CD Application deletion error
The application cannot be deleted due to finalizer issues or resource dependencies.
Argo CD Argo CD server not reachable
Network issues or incorrect service configuration prevent access to the Argo CD server.
Argo CD Image pull error
The container image cannot be pulled due to incorrect image name or registry access issues.
Argo CD Resource quota exceeded
The application exceeds the resource quotas set in the namespace.
Argo CD Application stuck in 'Progressing' state
The application is unable to complete the sync process due to pending resources or errors.
Argo CD Git repository access error
Argo CD cannot access the specified Git repository due to incorrect credentials or network issues.
Argo CD TLS handshake error
TLS handshake failure between Argo CD and the cluster or Git repository.
Argo CD Helm chart not found
The specified Helm chart repository or chart version is unavailable.
Argo CD Resource not found error
A specified resource in the application manifest does not exist in the cluster.
Argo CD OutOfSync status
The live state of the application does not match the desired state defined in Git.
Argo CD Cluster connection error
Argo CD cannot connect to the Kubernetes cluster due to incorrect cluster configuration or network issues.
Argo CD Unauthorized error
Argo CD does not have the necessary permissions to perform actions on the cluster.
Argo CD Application sync error
The application cannot be synced due to resource conflicts or missing resources.
Argo CD Invalid manifest error
The application manifest contains syntax errors or invalid configurations.

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