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Add token-based auth prerequisite for oc adm upgrade recommend #112077

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Add token-based auth prerequisite for oc adm upgrade recommend #112077

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8 changes: 8 additions & 0 deletions modules/oc-adm-upgrade-recommend.adoc
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Expand Up @@ -17,6 +17,14 @@ You can use the information provided by the output to make informed decisions ab
.Prerequisites

* You installed the latest version of {oc-first}.
* You are logged in with a token-based identity, such as `kubeadmin`, by using the `oc login` command.
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[NOTE]
====
The `oc adm upgrade recommend` command requires a bearer token to query the cluster's Thanos monitoring service for firing alerts. Certificate-based authentication, such as the `system:admin` identity provided in the default `kubeconfig` file from the installer, does not satisfy this requirement. If you use certificate-based authentication, the command output displays the following message and skips all alert-based precondition checks:

`Failed to check for at least some preconditions: no token is currently in use for this session`
====

.Procedure

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