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kubernetes health probes are an essential feature used to determine the health and status of applications running in a kubernetes cluster. they help ensure that your applications are running smoothly and can automatically manage undesired states by restarting or replacing unhealthy containers.

there are two main types of health probes in kubernetes:

1. **liveness probes**: these checks determine if a container is running. if the liveness probe fails, kubernetes will kill the container and, depending on the configuration, may restart it.

2. **readiness probes**: these checks determine if a container is ready to handle traffic. if the readiness probe fails, kubernetes will not send traffic to that pod until it passes again.

how health probes work

health probes can be configured to use one of these methods:

**http get**: kubernetes makes an http get request to the specified path and port.
**tcp socket**: kubernetes attempts to establish a tcp connection to the specified port.
**exec command**: kubernetes runs a specified command inside the container and checks the exit status.

configuring health probes

you can configure health probes in your kubernetes pod specification (yaml manifest) under the `containers` section.

here's a simple example of a kubernetes deployment with both liveness and readiness probes.

example deployment yaml



breakdown of the example

1. **deployment specification**:
the deployment is named `my-app` and specifies that three replicas (pods) should be running.

2. **container specification**:
the container is named `my-app-container` and uses the image `my-app-image:latest`, which should be replaced with the actual image you want to use.
the container listens on port 8080.

3. **liveness probe**:
the liveness probe is configured to send an http get request to the `/healthz` endpoint on port 8080.
`initialdelayseconds` specifies that the probe should wait 30 seconds after the container starts before per ...

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