Overview of Pod Disruption Budget (PDB)
The Pod Disruption Budget (PDB) is the resource management tool in Kubernetes that allows the administrators to control the impact of pod disruptions on application availability and reliability. PDBs enable administrators to define constraints on the number of pods that can be concurrently disrupted within a specified timeframe.
Therefore, by defining the appropriate disruption budgets, administrators can prevent excessive disruptions that cause service degradation or downtime during cluster maintenance or node failures. The following points highlight the Pod Disruption Budget in more detailed way:
- PDBs are configured at the namespace level and specify parameters such as the maximum number of disruptions allowed.
- They also define the minimum number of pods that must remain available during disruptions.
- Also, we can adjust them dynamically based on the workload priorities, resource utilization, and service level objectives (SLOs). Due to this, we can achieve operational efficiency along with the service reliability.
What Is Kubernetes Pod Disrupt Budget ?
Kubernetes simplifies the management and deployment of containerized applications. However, it can also suffer from disruptions that need to be managed within the Kubernetes ecosystem. The Kubernetes Pod Disrupt Budget, just like other Kubernetes policies, allows us to manage the pod disruptions that we can come across while managing our applications within the Kubernetes Cluster.
In this article, we will dive deep into the concept of setting up the Kubernetes Pod Disrupt Budget so that disruptions in the Kubernetes Pods will not affect the application’s workflow.