What is proper order of nodes for rolling upgrade?

[javadevmtl (None)]

Hi upgrading an Elastic 6.x to latest 6.x

Is there like a particular order that the nodes should be upgraded?

Masters first, then data, then coordinators. And then applications like Kibana, Filebeat, logstash etc...

Thanks

[leandrojmp (Leandro Pereira)]

Masters should be the last ones to be upgraded.

Upgrade all non master-eligible nodes and then upgrade the masters.

Just a note, 6.X is EOL and is not supported anymore, if you can, migrate to the last version.

[javadevmtl (None)]

Hi getting the below messages. Is that because the master node is not to the latest version?

[2022-07-26T14:07:13,342][INFO ][o.e.c.s.ClusterApplierService] [data] added {{coordinator}{aNIOOtCsQ2CbFu8c-3sQ9w}{5D1UtzP0S16njbdkwRgRKA}{9.0.5.132}{9.0.5.132:9300}{ml.machine_memory=4294967296, ml.max_open_jobs=20, xpack.installed=true, ml.enabled=true},}, reason: apply cluster state (from master [master {master}{4JBqdFvKQP-W-pDe51SkPA}{IwK3dB_sTKuDV782kRlc7w}{xxx.xxx.xxx.130}{xxx.xxx.xxx.130:9300}{ml.machine_memory=6442450944, ml.max_open_jobs=20, xpack.installed=true, ml.enabled=true} committed version [36088]])

[2022-07-26T14:07:13,384][INFO ][o.e.x.m.e.l.LocalExporter] [data] waiting for elected master node [{master}{4JBqdFvKQP-W-pDe51SkPA}{IwK3dB_sTKuDV782kRlc7w}{xxx.xxx.xxx.130}{xxx.xxx.xxx.130:9300}{ml.machine_memory=6442450944, ml.max_open_jobs=20, xpack.installed=true, ml.enabled=true}] to setup local exporter [default_local] (does it have x-pack installed?)
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