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RE: [EXTERNAL] Re: [E] Re: nodetool status and node maintenance

I have wrapped nodetool info into my own script that strips out and interprets the information I care about. That script also sets a return code based on the health of that node (which protocols are up, etc.). Then I can monitor the individual health of the node – as that node sees itself. I have found these much more actionable than up/down alerts from a single node’s view of the whole cluster (like nodetool status)



Sean Durity


From: Saha, Sushanta K <sushanta.saha@xxxxxxxxxxxxxxxxxxx>
Sent: Monday, October 29, 2018 7:52 AM
To: user@xxxxxxxxxxxxxxxxxxxx
Subject: [EXTERNAL] Re: [E] Re: nodetool status and node maintenance




On Fri, Oct 26, 2018 at 2:39 PM Alain RODRIGUEZ <arodrime@xxxxxxxxx> wrote:



Any way to temporarily make the node under maintenance invisible  from "nodetool status" output?


I don't think so.

I would use a different approach like for example only warn/email when the node is down for 30 seconds or a minute depending on how long it takes for your nodes to restart. This way the failure is not invisible, but ignored when only bouncing the nodes.


As a side note, be aware that the 'nodetool status' only give a view of the cluster from a specific node, that can be completely wrong as well :).




Alain Rodriguez - alain@xxxxxxxxxxxxxxxxx

France / Spain


The Last Pickle - Apache Cassandra Consulting


Le ven. 26 oct. 2018 à 15:16, Saha, Sushanta K <sushanta.saha@xxxxxxxxxxxxxxxxxxx> a écrit :

I have script that parses "nodetool status" output and emails alerts if any node is down. So, when I stop cassandra on a node for maintenance, all nodes stats emailing alarms.


Any way to temporarily make the node under maintenance invisible  from "nodetool status" output?






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