☁️ Free practice test question from: KCNA (KCNA)

Node Affinity is used to schedule pods on nodes that meet specific criteria, such as having SSD storage.

Pod Affinity is used to schedule pods relative to other pods, ensuring they are co-located or not co-located based on the rules defined.

Pod Anti-Affinity rules specify that certain pods should not be scheduled on the same node or within the same set of nodes as other specified pods. This is useful for ensuring high availability and fault tolerance by spreading pods across different nodes.

For example, you might use pod anti-affinity to ensure that replicas of a critical application are not scheduled on the same node, so that a node failure does not take down all replicas.

Node Anti-Affinity rules specify that pods should not be scheduled on nodes that have certain labels or characteristics. This is less common than pod anti-affinity but can be used to avoid scheduling pods on nodes with specific attributes.

For example, you might use node anti-affinity to ensure that pods are not scheduled on nodes that are designated for maintenance or have limited resources.