Merge pull request #110 from replicatedhq/gerard/sc-117738/coredns-nameserver-check

feat: [sc-117738] detect "plugin/forward: no nameservers found" from support bundles

Author: nvanthao

in-cluster/default.yaml

@@ -496,3 +496,15 @@ spec:
           - pass:
               when: "false"
               message: No OOMKilling event detected
+    - textAnalyze:
+        checkName: "CoreDNS nameserver configuration"
+        regex: "no nameservers found"
+        ignoreIfNoFiles: true
+        fileName: cluster-resources/pods/logs/kube-system/coredns-*/coredns.log
+        outcomes:
+          - fail:
+              when: "true"
+              message: "CoreDNS reported missing nameserver configuration. Ensure /etc/resolv.conf has at least 1 'nameserver' configured"
+          - pass:
+              when: "false"
+              message: "CoreDNS found valid nameserver configuration"