<p>If a Kubernetes pod is defined with host network enabled, is the application running on this pod accessible from the Service resource using the app selector? </p>

<p>Host network means it will use the host system's network. Services are created in pod network which is separate. So it can not be accessed that way. You can access a pod with host network directly using the IP of the host system. You should avoid using host network though for various reasons.</p>

<p>Here is an <a href="https://sookocheff.com/post/kubernetes/understanding-kubernetes-networking-model/" rel="noreferrer">article</a> to understand it more deeply. </p>
