This adds a `--interval-jitter-percentage` flag to the controller to
add a +/- percentage jitter to the interval defined in a HelmRelease
(defaults to 5%).
Effectively, this results in a reconciliation every 9.5 - 10.5 minutes
for a resource with an interval of 10 minutes.
Main reason to add this change is to mitigate spikes in memory and
CPU usage caused by many resources being configured with the same
interval.
Signed-off-by: Hidde Beydals <hidde@hhh.computer>
Likely after the upgrade to controller-runtime v0.15.0 a regression
surfaced for long-running reconciliations of HelmRelease resources (e.g.
for charts having pre-upgrade hooks taking a few minutes to complete).
This regression would cause the controller to immediately re-run the
upgrade after a successful upgrade, thus entering an almost-endless
loop.
Apparently, the only fix to this issue is to ensure
`.Status.LastReleaseRevision` is updated as soon as possible in the
reconiliation cycle rather than wait for the update at the end of the
cycle.
Signed-off-by: Aurel Canciu <aurelcanciu@gmail.com>
Hidde Beydals
Carlos Sanchez
Aurel Canciu