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Ryan Yin
ec208ab4d1
node-exporter always reports device_error=1 for containerd sandbox shm bind mounts (tmpfs), producing ~50 bogus critical alerts on the kubevirt hosts. Verified against live metrics that no non-shm device errors exist, so nothing real is filtered out. Signed-off-by: Ryan Yin <xiaoyin_c@qq.com>
Alert Rules
Alert rules are configurations that define conditions, scope, and actions for generating alerts from monitored signals, such as metrics, logs, or activity. When an alert rule's defined conditions are met for a specific resource within its scope, the system generates a triggered alert, which is the actual instance of the condition being met. These rules specify the data to monitor, the trigger threshold, and the resulting actions, like sending notifications to specific receivers or performing automated tasks.