kubectl-ko: collect information about ipsec and xfrm

[zhangzujian]

Pull Request

• Make sure you have followed Kube-OVN Code Style.

What type of this PR

Examples of user facing changes:

• Features
• Bug fixes
• Docs
• Tests

Which issue(s) this PR fixes

Fixes #(issue-number)

[gemini-code-assist]

Summary of Changes

Hello @zhangzujian, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the kubectl-ko tool by adding the ability to collect diagnostic information related to IPsec and XFRM configurations within the kube-ovn-cni pods. It also refactors the log_linux function to use a case statement, improving code readability.

Highlights

• Collect IPsec Information: Added functionality to collect IPsec configuration, CA certificates, certificates, and status information.
• Collect XFRM Information: Added functionality to collect XFRM policy and state information.
• CNI Pod Selection: Modified the script to target pods with the label app=kube-ovn-cni instead of app=ovs.
• Code Formatting: Replaced a series of if/elif statements with a case statement for improved readability in the log_linux function.

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[gemini-code-assist]

Code Review

This pull request adds functionality to the kubectl-ko log command to collect ipsec and xfrm information, which is a valuable addition for debugging network issues. The refactoring from a long if/elif chain to a case statement in the log_linux function significantly improves code readability and maintainability.

I've identified one area for improvement regarding performance: the script currently makes a separate kubectl call for each pod to determine its node, which can be inefficient in larger clusters. I've suggested a way to optimize this by fetching all required information in a single command.

Overall, this is a good change that enhances the diagnostic capabilities of the tool.

[gemini-code-assist]

This line fetches only pod names. The subsequent loop then makes an additional kubectl call for each pod to get its node name (on line 1107). This is inefficient due to the N+1 query problem and can be slow in clusters with many pods. It's better to fetch both pod and node names in a single kubectl call and process them together.

For example, you could refactor the loop like this:

  kubectl get pod -n kube-system -l app=kube-ovn-cni -o 'jsonpath={range .items[*]}{.metadata.name}{" "}{.spec.nodeName}{"\n"}{end}' | while read -r pod nodeName; do
    if [ -z "$pod" ]; then continue; fi
    # ... rest of the loop body ...
  done

This would significantly improve performance by reducing the number of kubectl calls.

[coveralls]

Pull Request Test Coverage Report for Build 16213165225

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.004%) to 21.429%

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Totals
Change from base Build 16209589487:	0.004%
Covered Lines:	10522
Relevant Lines:	49102

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💛 - Coveralls