DNS Validation failed from Container in Active-Passive Automation Suite Setup

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DNS Validation failed from Container in Active-Passive Automation Suite Setup

Scenario: Encountered Issue while upgrading installing Automation Suite Version 2023.10.2. Fabric failed with the error message

  • NO IP ADDRESS FOUND FROM CONTAINER.

Symptoms:

  1. Fabric Failed with NO IP ADDRESS FOUND Error
  2. Check DNS resolution via DIG command on cluster ip.

dig @10.43.0.10 alm.fqdn

above command should display A record against give FQDN if not then follow the resolution steps.

Error Screenshot:

Resolution:

  1. This issue can occur due to multiple FQDN configured in cluster config hence request rewriting is failing.
  2. To fix this check config map of CORE DNS with the command: kubectl get cm -A | grep coredns
  3. Take the backup of the coredns config map before editing with the command: kubectl get cm rke2-coredns-rke2-coredns -n kube-system -o yaml > rke2-coredns-rke2-coredns-backup.yaml
  4. Modify the CoreDNS config map after completing the backup with the command: kubectl edit cm rke2-coredns-rke2-coredns -n kube-system
  5. Remove line number 9 and save it.
  6. Re-Run Fabric Installer.

Resolution Screenshots: