Initially this method was returning a number of missed schedules, but
that turned out to be not reliable for some complex schedules. For
example, those which are being run only during week days. The second
approach was to only return a boolean indicating the too many missed
information. It turns out that we need to return all three values:
none missed, few missed and many missed, to let consumers know what to
do, but don't leak the wrong number out of mostRecentScheduleTime.
* Fix a job quota related deadlock
In case ResourceQuota is used and sets a max # of jobs, a CronJob may get
trapped in a deadlock:
1. Job quota for a namespace is reached.
2. CronJob controller can't create a new job, because quota is
reached.
3. Cleanup of jobs owned by a cronjob doesn't happen, because a
control loop iteration is finished because of an error to create a
job.
To fix this we stop early quitting from a control loop iteration when
cronjob reconciliation failed and always let old jobs to be cleaned up.
* Dont reorder imports
* Don't stop requeuing on reconciliation error
Previous code only logged the reconciliation error inside jm.sync() and
didn't return the reconciliation error to it's invoker
processNextWorkItem().
Adding a copy-paste back to avoid this issue.
* Remove copy-pasted cleanupFinishedJobs()
Now we always call jm.cleanupFinishedJobs() first and then
jm.syncCronJob().
We also extract cronJobCopy and updateStatus outside jm.syncCronJob
function and pass pointers to them in both jm.syncCronJob and
jm.cleanupFinishedJobs to make delayed updates handling more explicit
and not dependent on the order in which cleanupFinishedJobs and
syncCronJob are invoked.
* Return updateStatus bool instead of changing the reference
* Explicitly ignore err in tests to fix linter
Before this change we've assumed a constant time between schedule runs,
which is not true for cases like "30 6-16/4 * * 1-5".
The fix is to calculate the potential next run using the fixed schedule
as the baseline, and then go back one schedule back and allow the cron
library to calculate the correct time.
This approach saves us from iterating multiple times between last
schedule time and now, if the cronjob for any reason wasn't running for
significant amount of time.
The two methods nextScheduledTimeDuration and getNextScheduleTime have a
lot of similarities, so this commit squashes the common parts together
along with getMostRecentScheduleTime to avoid code duplication.
- Run hack/update-codegen.sh
- Run hack/update-generated-device-plugin.sh
- Run hack/update-generated-protobuf.sh
- Run hack/update-generated-runtime.sh
- Run hack/update-generated-swagger-docs.sh
- Run hack/update-openapi-spec.sh
- Run hack/update-gofmt.sh
Signed-off-by: Davanum Srinivas <davanum@gmail.com>
CRON_TZ variable slipped in during upgrading github.com/robfig/cron
library. It allows setting a time zone which is a long requested
feature but one that is not officially supported. This adds warning
event since users should not rely on unsupported features.
