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Adds a warning in the upgrade doc about split cluster #17755

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Nov 3, 2021
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Adds a warning in the upgrade doc about split cluster #17755

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6 changes: 6 additions & 0 deletions Documentation/operations/upgrade.rst
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Expand Up @@ -128,6 +128,12 @@ you can delete the cilium-preflight and proceed with the upgrade.
Upgrading Cilium
================

During normal cluster operations, all Cilium components should run the same
version. Upgrading just one of them (e.g., upgrading the agent without
upgrading the operator) could result in unexpected cluster behavior.
The following steps will describe how to upgrade all of the components from
one stable release to a later stable release.

.. include:: upgrade-warning.rst

Step 1: Upgrade to latest micro version (Recommended)
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