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In Raspberry Pi the functionality of self-heal feature is provided by systemd.

Code Flow

Resource Monitoring - resource_monitor.sh

• resource_monitor.sh monitors the Memory and CPU usage
• Average memory and CPU thresholds will be obtained from syscfg.db (default avg_cpu_threshold:100, avg_memory_threshold:100)

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Process Monitoring - task_health_monitor.sh

• task_health_monitor.sh monitors the status of various taks periodically and takes the corrective action
• Default monitoring interval is 15mins and can be modified using resource_monitor_interval in syscfg.db
• Monitors
  • Health of peer processor, in case of dual core processors
  • Other tasks added as part of the script
• New tasks can be added by editing the script

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Connectivity Test - self_heal_connectivity_test.sh

• Self_heal_connectivity_test.sh will run Ping and DNS tests.
• ConnTest_PingInterval in syscfg.db specifies the frequency of the connectivity test.
• If nothing specified, it is 60seconds by default.

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