Thursday, February 13, 2020

Netapp: Excessive DNS queries by Netapp Harvest Server against monitored Netapp Cluster

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Synopsis: Netapp nabox, if used ova image for 2.5 version considering it as a GA release is good in terms of use case. However, Server generates thousands of DNS queries against cluster in less than 24 hours.

I have ran into a problem where DNS server got choked with NABOX server that generated about 70K DNS requests for both 27A and 27AAAA request in less than 24 hours.

Resolution:
1.     Use IP address of Cluster (i.e. use cluster management IP) as source of cluster to be monitored.
2.     Use Beta Version of newer release running 2.6 that has the function that bundles dnsmasq as a local resolver.
I went with Option 2 as it was seamless and worth running hostname rather than using IP address and such.

Ref:




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