OCPBUGS-120940: quote YAML string fields in iptables-alerter Event - #3151
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Unquoted ${pod_namespace} and ${pod_name} expansions are parsed as YAML 1.1
booleans (yes/no/true/false/on/off), so kubectl cannot unmarshal
metadata.namespace as a string and the alerter CrashLoopBackOffs.
Signed-off-by: Devdatta Torne <dtorne@redhat.com>
Assisted-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
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@Devdatta-123: This pull request references Jira Issue OCPBUGS-120940, which is invalid:
Comment The bug has been updated to refer to the pull request using the external bug tracker. DetailsIn response to this:
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Summary by CodeRabbit
WalkthroughThe IPTables alerter script now quotes shell expansions used in Event YAML string fields. A test renders the ConfigMap and verifies the expected quoted placeholders. ChangesIPTables alerter YAML quoting
Estimated code review effort: 1 (Trivial) | ~5 minutes Merge Risk: 🔵 Low · up to The Event YAML now quotes dynamic identifiers to prevent namespace values such as YAML boolean keywords from breaking Event creation. The implementation is bounded, but the test does not independently protect both namespace fields from regression. Caution Pre-merge checks failedPlease resolve all errors before merging. Addressing warnings is optional.
❌ Failed checks (3 errors, 1 warning)
✅ Passed checks (11 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. (1 skipped: 1 unsupported.) Full details: Pr QualityExplanation The PR is a non-trivial functional bug fix. The diff changes the production iptables-alerter Event YAML and adds a render test, so the trivial/non-functional exemption does not apply. The description explains the cause, fix, and Jira issue, and the change is small at 46 additions and 6 deletions. However, its Resolution Update the PR description with a Full details: Commit Message QualityExplanation The PR contains one logical, non-merge commit with a concise subject and a body that explains the YAML 1.1 failure. However, the change is scoped to the network/iptables-alerter component, while the subject is prefixed only with
✨ Finishing Touches🧪 Generate unit tests (beta)
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Actionable comments posted: 1
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Inline comments:
In `@pkg/network/iptables_alerter_test.go`:
- Line 35: Update the assertion for rendered script in the relevant test to
verify both metadata.namespace and regarding.namespace are present with quoted
pod_namespace values, rather than checking only one generic namespace
occurrence; use distinct YAML-path assertions or an exact count of two quoted
occurrences.
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📒 Files selected for processing (2)
bindata/network/iptables-alerter/002-script.yamlpkg/network/iptables_alerter_test.go
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| func TestRenderIPTablesAlerterQuotesYAMLStringFields(t *testing.T) { |
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This is not doing anything useful. It's just validating "bindata/network/iptables-alerter/002-script.yaml contains the strings that we put into bindata/network/iptables-alerter/002-script.yaml". Notably, if someone added a new field to the event and failed to quote it, this test would not catch that.
It should probably just be removed. (iptables-alerter will be going away soon anyway.)
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Agreed. That test only checked that the rendered ConfigMap still contained the quoted strings we already put in 002-script.yaml, so it would not catch a newly added unquoted Event field.
Removed it in 169347d.
The test only asserted that the rendered script still contained the quoted strings we added, so it would not catch a new unquoted Event field. Signed-off-by: Devdatta Torne <dtorne@redhat.com> Co-authored-by: Cursor <cursoragent@cursor.com>
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/retest |
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@Devdatta-123: all tests passed! Full PR test history. Your PR dashboard. DetailsInstructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here. |
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Please squash the two commits together. We don't want to merge a wrong commit followed by a fixup. |
4 participants
Summary
yes,no,true,false,on,off) are treated as stringskubectl createfrom failing withcannot unmarshal bool into Go struct field ObjectMeta.metadata.namespace of type string, which CrashLoopBackOffs the DaemonSet and can leave cluster operatornetworkProgressingFixes: https://redhat.atlassian.net/browse/OCPBUGS-120940
Test plan
TestRenderIPTablesAlerterQuotesYAMLStringFieldspassesyes, run a pod in it that installs legacy iptables rules, and confirm iptables-alerter logs the Event instead of crashingkubectl get events -n yesshowsIPTablesUsageObservednetworkClusterOperator does not stay Progressing due to iptables-alerter CrashLoopBackOffSpecial notes for your reviewer
This change was prepared with AI assistance (Cursor). I reviewed the iptables-alerter script and the YAML 1.1 unmarshalling failure before opening this PR.
Made with Cursor