Description: The Pod Template Liveness Probe is a fundamental mechanism in the Kubernetes ecosystem, designed to check the status of running Pods. A Pod is the smallest unit that can be deployed and managed in Kubernetes and can contain one or more containers. The health probe allows Kubernetes to determine if a Pod is functioning correctly or if it needs to be restarted or replaced. This mechanism is implemented through two types of probes: the ‘liveness’ probe and the ‘readiness’ probe. The ‘liveness’ probe checks if the Pod is alive and operational, while the ‘readiness’ probe determines if the Pod is ready to receive traffic. These probes are configurable and can use different verification methods, such as HTTP requests, shell commands, or checking the availability of a port. Proper implementation of these probes is crucial for maintaining high availability and resilience of applications deployed in container orchestration platforms like Kubernetes, as it allows proactive resource management and quick response to failures, thus improving end-user experience and operational efficiency of the system.
