[v16] Expose configuration to set maximum number of PKCS#11 sessions#52880
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rosstimothy merged 1 commit intobranch/v16from Mar 7, 2025
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[v16] Expose configuration to set maximum number of PKCS#11 sessions#52880rosstimothy merged 1 commit intobranch/v16from
rosstimothy merged 1 commit intobranch/v16from
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The PKCS#11 that we use defaults to allowing 1024 concurrent sessions. If an HSM is configured with a lower limit it results in broken UX since the PKCS#11 library does not reuse open and available sessions until it has opened the maximum number of sessions that it can. While the library behavior is out of our control, we now allow users the ability to specify what their desired max and propagate it on to the PKCS#11 library so that it will not open more sessions than the HSM will allow. The auth config reference was updated to include `ca_key_params`. While these config options were somewhat discoverable via individual HSM guides, they were not mentioned in the auth reference.
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Backport #52768 to branch/v16
changelog: Allow specifying the maximum number of PKCS#11 HSM connections.