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[Docs] Enhance rolling upgrade guide (#49686) (#49692)
Add a couple of pointers for the user to check the overall cluster health and the version of ES running on every node. Fixes: #49670 (cherry picked from commit 8ca11f5)
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docs/reference/upgrade/rolling_upgrade.asciidoc

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@@ -158,7 +158,20 @@ recovery completes.
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When the node has recovered and the cluster is stable, repeat these steps
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for each node that needs to be updated.
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for each node that needs to be updated. You can monitor the health of the cluster
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with a <<cat-health,`_cat/health`>> request:
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[source,console]
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--------------------------------------------------
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GET /_cat/health?v
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--------------------------------------------------
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And check which nodes have been upgraded with a <<cat-nodes,`_cat/nodes`>> request:
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[source,console]
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--------------------------------------------------
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GET /_cat/nodes?h=ip,name,version&v
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--------------------------------------------------
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