Tracing in Kubernetes: kubectl capture plugin.

Released on April 4, 2019, a new kubectl capture plugin allows Kubernetes users to capture system calls using Sysdig without needing Sysdig preinstalled in their cluster, enhancing troubleshooting capabilities with a simple command. The plugin helps diagnose issues such as Kubernetes CrashLoopBackOff and 502 HTTP errors by generating capture files that can be analyzed using Sysdig Inspect for debugging or performance analysis. Users are encouraged to ensure they have a modern kubectl version (1.12.0 or later) before installation, which can be done by retrieving the plugin from GitHub and placing it in the system PATH. The plugin offers flexibility by supporting both kernel module and eBPF-based tracing, and it allows users to capture detailed data by utilizing flags like --snaplen for deeper insights. Once installed, the plugin facilitates real-time capture of all activity related to specific pods, storing the data locally for further analysis to identify root causes of errors, such as incorrect header formatting by load balancers leading to 502 errors. This open-source tool, along with Sysdig Inspect, aids in a comprehensive understanding of microservices interactions, promoting efficient troubleshooting and resolution of deployment issues.

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