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Cisco Bug: CSCvt70976 - JIRA Bug: MAGLEV-10849 -- DNA Center-Enhance ETCD server DNS lookup behavior in Cisco Umbrella envir

Last Modified

Aug 07, 2020

Products (1)

  • Cisco DNA Center

Known Affected Releases

DNAC1.3.3.1

Description (partial)

Symptom:
DNAC install failure. This bug is to enhance the ETCD lookup when kube-dns is not available.

During the issue, below output show umbrella  block page(X.X.X.X) is presented to DNAC instead of 127.0.0.1 which causes ETCD to break.

$ netstat -tnlp | grep 2379
(No info could be read for "-p": geteuid()=1234 but you should be root.)
tcp        0      0 X.X.X.X:2379     0.0.0.0:*               LISTEN      <<<<<<<<<<<<< umbrella  block page
tcp        0      0 192.168.46.1:2379       0.0.0.0:*               LISTEN      -


$ nslookup localhost
Server:         Y.Y.Y.Y
Address:        Y.Y.Y.Y#53

Non-authoritative answer:
Name:   localhost.default.svc.cluster.local
Address: X.X.X.X <<<<<<<<<<<<<umbrella  block page

Conditions:
Cisco Umbrella environment.
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