Upgrade ELK from 6.3 to 7.6

Elastic Stack Elasticsearch
1

Hi , we are planning to upgrade our ELK cluster from version 6.3 to 7.6
what are the most appropriate approach to do so

1 . without downtime
2. with downtime
3. how to do a backup of 9 nodes cluster before upgrade ?

Thanks in advance.

2

https://www.elastic.co/guide/en/elastic-stack/current/upgrading-elastic-stack.html is a great place to start.

And if you upgrade to 6.8 you can do a rolling upgrade to 7.X :smiley:

3

Thank you a lot .

4

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