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kubescape / node-agent

Kubescape eBPF agent 🥷🏻
https://kubescape.io/
Apache License 2.0
8 stars 5 forks source link

adding tests #236

Closed dwertent closed 8 months ago

dwertent commented 8 months ago

User description

Overview

Type

enhancement, tests

Description

Changes walkthrough

Relevant files
Enhancement
cache.go
Refactor Rule Binding Cache Implementation and Logging     
pkg/rulebindingmanager/cache/cache.go
  • Refactored addRuleBinding to use NewRuleBindingNotifierImpl instead of
    RuleBindingNotifierImplWithK8s.
  • In deleteRuleBinding, moved podToRBNames.Delete(podName) inside the
    condition checking for empty notifiers for consistency.
  • Changed log level from Error to Warning when failing to create a
    notifier in deleteRuleBinding.
    		•  +7/-9     
    Tests
    cache_test.go
    Extend Unit Tests for Rule Binding Cache Operations           
    pkg/rulebindingmanager/cache/cache_test.go
  • Added new unit tests for deleteRuleBinding with various scenarios
    including valid unique names, pods with multiple bindings, and
    notification checks.
  • Introduced tests for addRuleBinding covering scenarios like adding
    rule bindings with namespace and pod selectors, handling invalid
    selectors, and ensuring notifications are sent correctly.
  • Utilized k8sinterface.NewKubernetesApiMock and other mock objects for
    testing instead of the previous mock implementations.
    		•  +511/-3 

    ✨ PR-Agent usage: Comment /help on the PR to get a list of all available PR-Agent tools and their descriptions

    codiumai-pr-agent-free[bot] commented 8 months ago

    PR Description updated to latest commit (https://github.com/kubescape/node-agent/commit/d318f2d729ac8b6d20e82356a9b83681cfb23699)

    codiumai-pr-agent-free[bot] commented 8 months ago

    PR Review

    ⏱️ Estimated effort to review [1-5] 4, because the PR includes significant changes to both the implementation and testing of rule binding cache functionality. The refactoring of methods and the addition of comprehensive tests for new scenarios indicate a moderate level of complexity. Reviewing these changes requires a good understanding of the existing codebase and the intended improvements in functionality and test coverage.
    🧪 Relevant tests Yes
    🔍 Possible issues Logging Level Change: The change from logging at an "Error" level to a "Warning" level when failing to create a notifier in `deleteRuleBinding` might reduce the visibility of potential issues in production environments. Consider whether this change aligns with the severity of the failure to create notifiers.
    Test Coverage for Error Paths: It appears that the tests focus on successful scenarios. Including tests that cover error paths, such as failures to create notifiers or interact with the Kubernetes API, would improve the robustness of the test suite.
    🔒 Security concerns No
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    codiumai-pr-agent-free[bot] commented 8 months ago

    PR Code Suggestions

    CategorySuggestions                                                                                                                                                       
    Possible issue
    Add error handling for the creation of RuleBindingNotifierImpl. ___ **Consider handling the error when creating a new RuleBindingNotifierImpl. In the removed
    code, there was error handling for the creation of a notifier, which has been omitted in
    the new implementation. This could lead to silent failures that are difficult to debug.
    You might want to add similar error handling as before or log the potential error.** [pkg/rulebindingmanager/cache/cache.go [204]](https://github.com/kubescape/node-agent/pull/236/files#diff-0674d450411ce55370a6341da8d3a34cadffe21ba15112d3f29955de58e51156R204-R204) ```diff -n := rulebindingmanager.NewRuleBindingNotifierImpl(rulebindingmanager.Added, pod) +n, err := rulebindingmanager.NewRuleBindingNotifierImpl(rulebindingmanager.Added, pod) +if err != nil { + logger.L().Error("failed to create notifier", helpers.String("type", "Added"), helpers.String("pod", pod.GetName()), helpers.Error(err)) + continue +} ```
    Enhancement
    Add logging when a pod is deleted from c.podToRBNames. ___ **The deletion of a pod from c.podToRBNames after checking its cardinality is a good
    improvement. However, consider adding a debug or info log statement when a pod is deleted
    from c.podToRBNames. This will improve the observability of the cache behavior and make it
    easier to debug issues related to rule binding deletions.** [pkg/rulebindingmanager/cache/cache.go [223]](https://github.com/kubescape/node-agent/pull/236/files#diff-0674d450411ce55370a6341da8d3a34cadffe21ba15112d3f29955de58e51156R223-R223) ```diff c.podToRBNames.Delete(podName) +logger.L().Debug("Deleted pod from podToRBNames", helpers.String("podName", podName)) ```
    Increment a metric when failing to create a notifier for better visibility. ___ **The use of continue inside the loop after logging a warning when failing to create a
    notifier is appropriate. However, it might be beneficial to also increment a metric or
    counter to track how often this issue occurs. This would provide better visibility into
    the system's health and the frequency of such errors.** [pkg/rulebindingmanager/cache/cache.go [231]](https://github.com/kubescape/node-agent/pull/236/files#diff-0674d450411ce55370a6341da8d3a34cadffe21ba15112d3f29955de58e51156R231-R231) ```diff logger.L().Warning("failed to create notifier", helpers.String("namespace", namespace), helpers.String("name", name), helpers.Error(err)) +metrics.Increment("rulebindingmanager.notifier_creation_failures") continue ```
    Best practice
    Revert to using Error level logging for critical notifier creation failures. ___ **Changing the log level from Error to Warning in the case of failing to create a notifier
    might not be appropriate if the failure impacts the functionality significantly. Consider
    the impact of not creating a notifier. If it's critical, revert to using Error level
    logging to ensure visibility of such issues.** [pkg/rulebindingmanager/cache/cache.go [231]](https://github.com/kubescape/node-agent/pull/236/files#diff-0674d450411ce55370a6341da8d3a34cadffe21ba15112d3f29955de58e51156R231-R231) ```diff -logger.L().Warning("failed to create notifier", helpers.String("namespace", namespace), helpers.String("name", name), helpers.Error(err)) +logger.L().Error("failed to create notifier", helpers.String("namespace", namespace), helpers.String("name", name), helpers.Error(err)) ```
    Performance
    Move the check for len(c.notifiers) == 0 to the beginning of the deleteRuleBinding function for efficiency. ___ **The addition of a check for len(c.notifiers) == 0 before attempting to create a notifier
    in the deleteRuleBinding function is a good optimization. However, it would be more
    efficient to place this check at the beginning of the function to avoid unnecessary
    operations if there are no notifiers.** [pkg/rulebindingmanager/cache/cache.go [225]](https://github.com/kubescape/node-agent/pull/236/files#diff-0674d450411ce55370a6341da8d3a34cadffe21ba15112d3f29955de58e51156R225-R225) ```diff +// Place this check at the beginning of the function if len(c.notifiers) == 0 { - continue + return } ```
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