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49 lines
1.9 KiB
Text
49 lines
1.9 KiB
Text
[[setup-upgrade]]
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= Upgrade {es}
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{es} clusters can usually be upgraded one node at a time so upgrading does not
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interrupt service. For upgrade instructions, refer to
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{stack-ref}/upgrading-elastic-stack.html[Upgrading to Elastic {version}].
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.Upgrade from 7.x
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IMPORTANT: To upgrade to {version} from 7.16 or an earlier version, **you must
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first upgrade to {prev-major-last}**, even if you opt to do a full-cluster
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restart instead of a rolling upgrade. This enables you to use the **Upgrade
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Assistant** to identify and resolve issues, reindex indices created before 7.0,
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and then perform a rolling upgrade. You must resolve all critical issues before
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proceeding with the upgrade. For instructions, refer to
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{stack-ref}/upgrading-elastic-stack.html#prepare-to-upgrade[Prepare to upgrade
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from 7.x].
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[discrete]
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[[upgrade-index-compatibility]]
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=== Index compatibility
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{es} has full query and write support for indices created in the previous major
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version. If you have indices created in 6.x or earlier, you might use the
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<<archive-indices,archive functionality>> to import them into newer {es}
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versions, or you must reindex or delete them before upgrading to {version}.
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{es} nodes will fail to start if incompatible indices are present.
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Snapshots of 6.x or earlier indices can only restored using the
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<<archive-indices,archive functionality>> to a 8.x cluster even if they
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were created by a 7.x cluster.
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The **Upgrade Assistant** in {prev-major-last} identifies any indices
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that need to be reindexed or removed.
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[discrete]
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[[upgrade-rest-api-compatibility]]
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=== REST API compatibility
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<<rest-api-compatibility,REST API compatibility>> is a per-request opt-in
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feature that can help REST clients mitigate non-compatible (breaking) changes to
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the REST API.
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[discrete]
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[[upgrade-fips-java17]]
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=== FIPS Compliance and Java 17
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include::{xes-repo-dir}/security/fips-java17.asciidoc[]
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include::upgrade/archived-settings.asciidoc[]
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include::upgrade/archive-indices.asciidoc[]
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