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feat(mainhandler): re-render schedules whose containers differ from the template - #476
The operator renders a recurring scan schedule from the chart's template once, when it creates the schedule. After that, only the schedule and the annotations change. So a persisted schedule keeps the containers of the chart release it was created under. A chart upgrade that changes the scheduler image or command does not reach it.
MigrateScheduleCronJobs (#447) repairs this at startup for one case only: schedules whose container args still name v1/triggerAction, that is, schedules created before kubescape/helm-charts#964. Any later template change stays out of reach.
No current chart release is affected, because the schedule templates have not changed since 1.41.0. The fix for kubescape/helm-charts#923 will change them. Schedules created under 1.41.0 run scripts/create-operator-command.sh on quay.io/kubescape/kubectl:1.36.1. kubescape/helm-charts#996 added the create-operator-command subcommand to kubescape-ops-tool, and the next chart change moves the schedule templates to it. That change also stops shipping the command-scripts ConfigMap. Without this PR, the pods of the persisted schedules then cannot start, and the recurring scans stop.
The gap is not specific to that change. Take a template change that only bumps the image, for example to a maintained kubectl image. It does not reach the persisted schedules either, and no error shows it.
This PR re-renders a schedule whenever its containers (name, image, command and args) differ from the containers of the current template. The API server defaults none of these fields, so a schedule that matches its template gets no update. A later template change, an image bump included, then reaches the persisted schedules at the next operator start. The chart then does not need an operator change for each template change.
Name, schedule, time zone, labels, annotations and the request ConfigMap stay as they are, as in #447. A template that is not installed still leaves its schedules alone. The migration now touches only the CronJobs that the operator created: their request volume points at a ConfigMap with the schedule's own name. The chart's kubescape-scheduler and kubevuln-scheduler CronJobs have the same tier label, but name that volume differently, so they stay as Helm renders them. postsToTriggerEndpoint is removed, because nothing uses it now.
The chart change that moves the schedule templates to kubescape-ops-tool will pin an operator release with this change. Then the operator restarts in the same upgrade and moves the schedules.
How to Test
go test -race ./mainhandler/:
TestMigrateScheduleCronJobsMovesScriptSchedulesToTheOpsTool: in each tier, a schedule that runs the script is re-rendered from a kubescape-ops-tool template and loses the command-scripts and tmp-dir volumes. A schedule that already runs the template's containers is not updated.
A CronJob like the chart's own scheduler, with the tier label and different containers, is not updated. Without the ownership check, this case fails.
Against a real API server (kind), with the planned kubescape-ops-tool schedule template as the example of a template change:
With the kubescape-cronjob-template ConfigMap from helm-charts 1.41.0, getCronJobTemplate and setCronJobForTriggerRequest created a schedule, as the operator does. Then the ConfigMap was changed to the kubescape-ops-tool template, and a second schedule was created from it.
MigrateScheduleCronJobs moved the 1.41.0 schedule from kubectl:1.36.1 with three volumes to kubescape-ops-tool with one volume.
The second schedule kept its resourceVersion. Thus the defaults of the API server do not make the comparison find a difference. A second run wrote nothing.
On main without this PR, the same set-up left the 1.41.0 schedule as it was. With the command-scripts ConfigMap removed, a Job from it stayed in ContainerCreating with configmap "operator-command-scripts" not found.
My code follows the style guidelines of this project
I have commented on my code, particularly in hard-to-understand areas
I have performed a self-review of my code
If it is a core feature, I have added thorough tests.
New and existing unit tests pass locally with my changes
Summary by CodeRabbit
Bug Fixes
Schedule migrations now update jobs when their container settings differ from the installed template, including jobs that use the direct operations-tool command.
Migrated schedules retain their schedule-specific configuration.
If a migration fails for one schedule, processing continues for the remaining schedules, and the first error is reported.
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Reviewing files that changed from the base of the PR and between ff159f6 and 1400df4.
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mainhandler/cronjobmigration.go
mainhandler/cronjobmigration_test.go
Walkthrough
The migration now rerenders tier-mapped schedules when their current containers differ from the template-rendered containers. Tests cover migration from script-based containers to the ops-tool template and unchanged schedules.
Changes: Schedule migration
Layer / File(s)
Summary
Container comparison and migration coverage mainhandler/cronjobmigration.go, mainhandler/cronjobmigration_test.go
The migration selects schedules with a tier template and compares their containers with the rendered template. Tests cover changed and unchanged schedules, including migration from script-based containers to the ops-tool template.
kubescape/operator#447: Introduced MigrateScheduleCronJobs, which this change extends with container comparison against the tier template.
Suggested reviewers:blacksoxx
Merge Risk: Moderate · previous review ff159
The migration can now rewrite the pod spec of CronJobs that the operator backend did not create, including the Helm-managed scheduler, and drop settings such as priorityClassName. Add an ownership check before the pod spec is replaced.
Pre-merge checks: 4 · 1
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The title clearly and concisely describes the main change: re-rendering schedules when their containers differ from the template.
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Actionable comments posted: 1
Fix comments: Fix CodeRabbit comments on this PR
Prompt to fix all issues
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Inline comments:
Review comments at @mainhandler/cronjobmigration.go:
- Line 47: Restrict the migration branch at `if !ok` to schedules identified by
an ownership marker that distinguishes backend-created schedules from
Helm-managed and other CronJobs; verify that marker on existing schedules before
replacing their pod spec, and do not use the shared tier label alone as evidence
of ownership.
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Reviewing files that changed from the base of the PR and between 200cd5e and ff159f6.
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mainhandler/cronjobmigration.go
mainhandler/cronjobmigration_test.go
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…he template
A persisted schedule keeps the containers of the chart release it was
created under, so a chart upgrade that changes the scheduler image or
command does not reach it. MigrateScheduleCronJobs (kubescape#447) re-renders a
schedule only while its container args still name v1/triggerAction, which
covers the schedules created before kubescape/helm-charts#964 and no later
template change.
Schedules created under helm-charts 1.41.0 run
scripts/create-operator-command.sh on quay.io/kubescape/kubectl:1.36.1.
Each fix for kubescape/helm-charts#923 changes that image: a maintained
kubectl image would not reach them, and a move to kubescape-ops-tool
without the command-scripts ConfigMap would stop their pods from starting.
Re-render a schedule whenever its containers (name, image, command, args)
differ from the current template's. The API server defaults none of these
fields, so a schedule that matches its template is still left alone, and
a later template change, including an image bump, reaches the persisted
schedules on the next operator start.
Touch only the CronJobs the operator created, whose request volume points
at a ConfigMap of the schedule's own name. The chart's own scheduler
CronJobs carry the same tier label but name that volume differently, so
they keep what Helm renders.
Signed-off-by: Andreas Hauser <andreas@a-h.io>
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The broader migration addresses persisted schedules that retain outdated container settings after chart upgrades. The ownership check also resolves the earlier concern about Helm-managed schedulers. No blocking issues found. Targeted migration tests passed in an isolated container; build and integration CI were still running at review time.
* feat(scheduler): run the scan schedulers on kubescape-ops-tool
The scan schedulers ran scripts/create-operator-command.sh on
quay.io/kubescape/kubectl:1.36.1, whose Photon base carries 25 critical
CVEs and can no longer be refreshed (#923). The chart's two scheduler
CronJobs and the operator's three schedule templates now run the
create-operator-command subcommand of the distroless kubescape-ops-tool
(#996), which keeps the script's flags.
kubescapeOpsTool.image moves to 0.2.0-r1, the first tag with the
subcommand. kubescapeScheduler.image, kubevulnScheduler.image and
registryScanScheduler.image are removed, as #929 did for the certgen and
rollout images. The operator-command-scripts ConfigMap, the script and
the command-scripts and tmp-dir volumes are gone.
Fixes#923
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>
* chore(operator): bump operator to v0.2.209
v0.2.209 includes kubescape/operator#476. At startup it re-renders the
schedules it created whose containers differ from the current template,
so they move off the removed operator-command-scripts ConfigMap.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>
* fix(scheduler): reject scheduler image values that would break the schedules
Addresses CodeRabbit review 5773593168.
- Fail rendering when kubescapeScheduler.image, kubevulnScheduler.image
or registryScanScheduler.image names a repository other than the old
default quay.io/kubescape/kubectl, for example a private mirror. Such
an override was silently ignored, so the scheduler pulled the public
ops-tool image instead. The old default itself is tolerated.
- Fail rendering on kubescapeOpsTool.image.tag 0.1.0-r1, which has no
create-operator-command. An upgrade from 1.41.0 with --reuse-values
keeps that default and would render schedulers that cannot run.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>
* test(snapshot): regenerate snapshots with CI's helm-unittest image
The earlier snapshot update used an older local helm-unittest, which
rendered the node-agent AppArmor profile and excludeJsonPaths differently
from CI. Regenerated with helmunittest/helm-unittest:latest, so only
this PR's scheduler changes remain in the snapshot diff.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>
---------
Signed-off-by: Matthias Bertschy <matthias.bertschy@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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Overview
The operator renders a recurring scan schedule from the chart's template once, when it creates the schedule. After that, only the schedule and the annotations change. So a persisted schedule keeps the containers of the chart release it was created under. A chart upgrade that changes the scheduler image or command does not reach it.
MigrateScheduleCronJobs(#447) repairs this at startup for one case only: schedules whose container args still namev1/triggerAction, that is, schedules created before kubescape/helm-charts#964. Any later template change stays out of reach.No current chart release is affected, because the schedule templates have not changed since 1.41.0. The fix for kubescape/helm-charts#923 will change them. Schedules created under 1.41.0 run
scripts/create-operator-command.shonquay.io/kubescape/kubectl:1.36.1. kubescape/helm-charts#996 added thecreate-operator-commandsubcommand tokubescape-ops-tool, and the next chart change moves the schedule templates to it. That change also stops shipping thecommand-scriptsConfigMap. Without this PR, the pods of the persisted schedules then cannot start, and the recurring scans stop.The gap is not specific to that change. Take a template change that only bumps the image, for example to a maintained
kubectlimage. It does not reach the persisted schedules either, and no error shows it.This PR re-renders a schedule whenever its containers (name, image, command and args) differ from the containers of the current template. The API server defaults none of these fields, so a schedule that matches its template gets no update. A later template change, an image bump included, then reaches the persisted schedules at the next operator start. The chart then does not need an operator change for each template change.
Name, schedule, time zone, labels, annotations and the request ConfigMap stay as they are, as in #447. A template that is not installed still leaves its schedules alone. The migration now touches only the CronJobs that the operator created: their request volume points at a ConfigMap with the schedule's own name. The chart's
kubescape-schedulerandkubevuln-schedulerCronJobs have the same tier label, but name that volume differently, so they stay as Helm renders them.postsToTriggerEndpointis removed, because nothing uses it now.Signed Commits
Additional Information
The chart change that moves the schedule templates to
kubescape-ops-toolwill pin an operator release with this change. Then the operator restarts in the same upgrade and moves the schedules.How to Test
go test -race ./mainhandler/:TestMigrateScheduleCronJobsMovesScriptSchedulesToTheOpsTool: in each tier, a schedule that runs the script is re-rendered from akubescape-ops-tooltemplate and loses thecommand-scriptsandtmp-dirvolumes. A schedule that already runs the template's containers is not updated.kubescape-ops-toolschedule template as the example of a template change:kubescape-cronjob-templateConfigMap from helm-charts 1.41.0,getCronJobTemplateandsetCronJobForTriggerRequestcreated a schedule, as the operator does. Then the ConfigMap was changed to thekubescape-ops-tooltemplate, and a second schedule was created from it.MigrateScheduleCronJobsmoved the 1.41.0 schedule fromkubectl:1.36.1with three volumes tokubescape-ops-toolwith one volume.resourceVersion. Thus the defaults of the API server do not make the comparison find a difference. A second run wrote nothing.mainwithout this PR, the same set-up left the 1.41.0 schedule as it was. With thecommand-scriptsConfigMap removed, a Job from it stayed inContainerCreatingwithconfigmap "operator-command-scripts" not found.Related issues/PRs:
quay.io/kubescape/kubectl:1.36.1has 25 critical CVEs and its base can no longer be refreshed helm-charts#923Checklist before requesting a review
Summary by CodeRabbit