Add kernel restart functionality across frontend and backend#332
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Edwardvaneechoud wants to merge 1 commit intofeauture/kernel-implementationfrom
Open
Add kernel restart functionality across frontend and backend#332Edwardvaneechoud wants to merge 1 commit intofeauture/kernel-implementationfrom
Edwardvaneechoud wants to merge 1 commit intofeauture/kernel-implementationfrom
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Implements a "Restart Kernel" feature that allows users to recover from
runtime issues (memory leaks, hung processes, corrupted state) without
losing code or flow configuration.
Backend:
- Add RESTARTING state to KernelState enum
- Add restart_kernel() method to KernelManager that stops the container,
creates a fresh one with the same config (packages, memory/CPU limits),
and waits for health check
- Add _get_container_logs() helper for diagnostic output on restart failure
- Add POST /kernels/{kernel_id}/restart API endpoint
Frontend:
- Add "restarting" to KernelState type with spinner icon and yellow badge
- Add KernelApi.restart() method
- Add "Restart" button to KernelCard (visible when idle/executing/error)
- Add restart button to PythonScript node settings next to kernel dropdown
- Wire up restart handling in KernelManagerView and useKernelManager
- Status indicator updates in real-time (restarting -> idle)
- Error messages surface container logs on restart failure
https://claude.ai/code/session_01G7rwmj8nw9LnXdEVppxgnp
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Summary
This PR adds the ability to restart kernel containers while preserving their configuration. Users can now restart kernels from both the Kernel Manager view and the Python Script node editor, with visual feedback during the restart process.
Key Changes
Backend (flowfile_core)
KernelState.RESTARTINGenum value to track restart staterestart_kernel()method in kernel manager that:_get_container_logs()helper to retrieve container logs for error reporting/kernels/{kernel_id}/restartAPI endpoint with authorization checksFrontend (flowfile_frontend)
KernelStatetype support for "restarting" stateKernelApi.restart()method for API communicationrestartKernel()action inuseKernelManagercomposableImplementation Details