Argo CD Argo CD repository certificate error

What is Argo CD Argo CD repository certificate error

Understanding Argo CD

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

Identifying the Symptom

One common issue users may encounter is the 'Argo CD repository certificate error'. This error typically manifests when Argo CD is unable to access the Git repository due to certificate validation issues. Users might see error messages indicating SSL or certificate validation failures.

Exploring the Issue

The 'Argo CD repository certificate error' occurs when there are problems with the SSL/TLS certificates used to secure the connection between Argo CD and the Git repository. This can be due to expired certificates, incorrect certificate configurations, or untrusted certificate authorities.

Common Error Messages

SSL certificate problem: unable to get local issuer certificate certificate has expired self-signed certificate in certificate chain

Steps to Resolve the Issue

1. Verify the Certificate

Ensure that the certificate used by the Git repository is valid and not expired. You can use tools like SSL Checker to verify the certificate details.

2. Update the Certificate Authority (CA) Bundle

If the certificate is valid but still not trusted, update the CA bundle used by Argo CD. This can be done by adding the certificate to the trusted CA list on the server running Argo CD.

sudo cp /path/to/your/certificate.crt /usr/local/share/ca-certificates/sudo update-ca-certificates

3. Configure Argo CD to Trust Self-Signed Certificates

If you are using self-signed certificates, configure Argo CD to trust them by adding the certificate to the Argo CD configuration. This can be done by updating the argocd-cm ConfigMap:

kubectl edit configmap argocd-cm -n argocd

Add the following entry under data:

repositories: | - url: https://your.repo.url tlsClientConfig: insecure: true

4. Restart Argo CD

After making changes, restart the Argo CD server to apply the new configurations:

kubectl rollout restart deployment argocd-server -n argocd

Further Reading

For more information on configuring Argo CD and troubleshooting common issues, visit the official Argo CD documentation.