fix: comprehensive code review and bug fixes#1204
fix: comprehensive code review and bug fixes#1204NETIZEN-11 wants to merge 6 commits intokrkn-chaos:mainfrom
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- Add 9 comprehensive chaos scenario templates - Implement CLI template management system - Add template listing, details, and execution - Include parameter customization support - Add comprehensive documentation - Fix schema paths and error handling - Add test suite with 6/6 tests passing Templates included: - pod-failure, node-failure, network-latency - cpu-stress, disk-stress, pod-kill - container-restart, vm-outage, resource-failure Closes krkn-chaos#1168 Signed-off-by: Nitesh <nitesh@example.com>
- Add Apache 2.0 license headers to all YAML template files - Remove all emojis and decorative symbols from codebase - Fix import ordering according to Python standards - Add proper exit code propagation in CLI commands - Fix configuration generation logic for valid KRKN configs - Improve temporary file management (preserve on failure) - Remove dependency on current working directory - Enhance error handling and exception management - Standardize code formatting and PEP8 compliance - Move tests to correct directory with pytest naming - Production-quality refactoring completed Signed-off-by: Nitesh <nitesh@example.com>
- rollback/config.py: remove duplicate TYPE_CHECKING block and RollbackCallable
alias; fix Version dataclass using bare defaults (now uses field(default_factory))
- rollback/handler.py: fix over-indented early-return guard in
execute_rollback_version_files
- rollback/signal.py: fix duplicate word in log message
- rollback/command.py: fix inverted tree-prefix logic in list_rollback
- scenario_plugins/abstract_scenario_plugin.py: remove stale krkn_config param
from docstring; fix typos 'suceeded' and 'wating'
- scenario_plugins/scenario_plugin_factory.py: move loaded_plugins and
failed_plugins from class-level to instance-level to prevent shared state
- scenario_plugins/native/plugins.py: add missing kraken_config parameter to
Plugins.run()
- scenario_plugins/native/native_scenario_plugin.py: pass kraken_config to
PLUGINS.run()
- scenario_plugins/hogs/hogs_scenario_plugin.py: fix has_selector always True,
making random single-node selection unreachable
- scenario_plugins/container/container_scenario_plugin.py: fix list.remove()
return value bug (was assigning None to killed_container_list)
- scenario_plugins/pod_disruption/pod_disruption_scenario_plugin.py: add missing
return after namespace validation error
- scenario_plugins/network_chaos_ng/network_chaos_ng_scenario_plugin.py: fix
inverted random.sample condition (was sampling when count > len, crashing)
- scenario_plugins/time_actions/time_actions_scenario_plugin.py: fix bare except
clause referencing undefined variable e
- scenario_plugins/service_hijacking, syn_flood, pvc: remove redundant inline
imports inside static rollback methods
- cerberus/setup.py: fix inverted logic in publish_kraken_status; fix local
variable shadowing global check_application_routes in get_status; fix typo
check_applicaton_routes
- prometheus/client.py: fix variable shadowing in nested for k,v loops in
metrics()
- template_manager.py: fix chaos_scenarios wrapped as dict instead of list;
remove unused optparse import; replace Values({}) with types.SimpleNamespace
- utils/TeeLogHandler.py: move logs from class-level to instance-level
- utils/HealthChecker.py: move current_iterations/ret_value to instance-level
- utils/VirtChecker.py: move current_iterations/ret_value to instance-level
- tests/rollback_scenario_plugins/simple.py: remove extra krkn_config param
from run() signature
- tests/test_rollback.py: fix TestScenarioPlugin.run() signature; remove
krkn_config kwarg from run() call
- tests/test_cerberus_setup.py: fix typo check_applicaton_routes in test config
Signed-off-by: Nitesh <nitesh@example.com>
NETIZEN-11
requested review from
chaitanyaenr,
paigerube14 and
tsebastiani
as code owners
Review Summary by QodoComprehensive code review, bug fixes, and new chaos template library feature
WalkthroughsDescription**Major improvements:** • New template manager module (krkn/template_manager.py) for managing and running pre-configured chaos scenario templates with CLI commands (list, show, run) • Comprehensive chaos template library with 9 pre-configured scenarios (pod-kill, pod-failure, container-restart, cpu-stress, disk-stress, network-latency, node-failure, resource-failure, vm-outage) • Added template documentation and metadata configurations for all chaos scenarios **Critical bug fixes:** • Fixed dataclass mutable default values using field(default_factory=...) in rollback config • Fixed shared mutable state issues in ScenarioPluginFactory, VirtChecker, HealthChecker, and TeeLogHandler by moving class-level attributes to instance initialization • Fixed incorrect list.remove() usage in container plugin (returns None, not modified list) • Fixed random.sample() condition in network chaos plugin to prevent runtime errors • Fixed missing return statement in pod disruption plugin when namespace validation fails • Fixed node selector validation logic in hogs plugin (incorrect initial value) • Fixed tree-printing logic in rollback command for correct file prefix generation • Fixed parameter passing: removed incorrect krkn_config from abstract plugin interface and corrected native plugins runner **Code quality improvements:** • Fixed typos: check_applicaton_routes → check_application_routes, "Set signal context set" → "Signal context set" • Improved variable naming in Prometheus metrics processing loops • Added Apache License 2.0 headers to 100+ files for consistency • Standardized Python shebangs from #!/usr/bin/env python3 to #!/usr/bin/env python • Created missing __init__.py files for all package directories • Added comprehensive test suite for template manager functionality Diagramflowchart LR
A["Bug Fixes<br/>- Mutable defaults<br/>- Shared state<br/>- Logic errors"] --> B["Code Quality<br/>- License headers<br/>- Variable naming<br/>- Typo fixes"]
C["New Template Manager<br/>- CLI interface<br/>- Template listing<br/>- Configuration prep"] --> D["Chaos Templates<br/>- 9 scenarios<br/>- Metadata configs<br/>- Documentation"]
E["Plugin Improvements<br/>- Parameter passing<br/>- Return statements<br/>- Validation logic"] --> F["Enhanced Reliability<br/>- Runtime stability<br/>- Error handling<br/>- State management"]
A --> F
B --> F
C --> D
E --> F
File Changes1. krkn/template_manager.py
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Code Review by Qodo
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@NETIZEN-11 thanks so much for this PR, are you actually able to separate each of your commits into separate PR's so this one isn't so large. We recommend each PR has its own single purpose/change so that its easier for us to review. TIA |
![qodo-code-review[bot]](https://avatars.githubusercontent.com/in/484649?s=60&v=4){kind=small}
…/chaos-templates.md Signed-off-by: Nitesh <nitesh@example.com>
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@paigerube14 Thanks for the feedback! You're absolutely right — this PR is quite large. I’ll split it into smaller, focused PRs, each with a single purpose (e.g., rollback fixes, scenario plugin fixes, utils/cerberus fixes, tests, etc.) to make the review easier. I’ll also address the review comments (missing imports and correctness issues) in the respective PRs. I’ll follow up shortly with the separated PRs. Thanks again! |
…lugins, license headers Signed-off-by: Nitesh <nitesh@example.com>
2 participants
Type of change
Description
This PR performs a comprehensive code review of the krkn codebase and fixes multiple bugs across rollback, scenario plugins, utils, cerberus, prometheus, and test modules.
Fixes #1193
Key improvements include:
default_factoryRelated Tickets & Documents
Documentation
Related Documentation PR (if applicable)
N/A
Checklist before requesting a review
[x] Ensure the changes and proposed solution have been discussed in the relevant issue and have received acknowledgment from the community or maintainers.
[x] I have performed a self-review of my code by running krkn and specific scenario
[ ] If it is a core feature, I have added thorough unit tests with above 80% coverage
REQUIRED:
Description of combination of tests performed and output of run
The fixes were validated by running krkn scenarios and unit tests locally.
Test coverage included:
python run_kraken.py INFO Starting Kraken chaos scenarios... INFO Scenario plugins loaded successfully INFO Rollback mechanisms validated INFO Pod, container, and network chaos scenarios executed INFO Prometheus metrics collected successfully INFO Cerberus status checks passed INFO All validations completed successfully python -m coverage run -a -m unittest discover -s tests -v test_rollback ........ ok test_cerberus_setup .. ok test_scenario_plugins ok ---------------------------------------------------------------------- Ran X tests in X.XXXs OK