The dynamic synergy between Kubernetes and Databases enables the encapsulation of databases within containers, guaranteeing uniform environments, scalability, and robust availability.
Through Kubernetes’ offerings, such as Persistent Volumes for data storage and Services for network connectivity, databases are not only efficiently deployed but also maintain their resilience and accessibility.
This powerful alliance of Kubernetes and databases lays the foundation for contemporary, expandable, and dependable data storage solutions in the era of cloud computing.
Now, let’s delve into the breakdown of the diagram illustrating how Kubernetes facilitates the deployment of databases:
- ⮕ User/Application: This entity represents either a user or an application aiming to initiate the deployment of a database within a Kubernetes cluster. The user or application sends a deployment request.
- ⮕ Kubernetes API: Once the request arrives, the Kubernetes API serves as the gateway. It takes on the role of managing and processing all incoming requests and directives directed to the Kubernetes cluster.
- ⮕ Kubernetes Control Plane: Subsequent to the Kubernetes API processing the request, it communicates with the Kubernetes Control Plane. The Control Plane constitutes the collection of components responsible for overseeing the overall state of the Kubernetes system. It ensures that the cluster’s present condition aligns with the user or application’s desired configuration.
- ⮕ Kubernetes Nodes: The Control Plane interacts with the Kubernetes Nodes, which serve as the operational units where containers (and, in this context, databases) are to be deployed.
- ⮕ Pods (Database Instances): In Kubernetes, Pods stand as the smallest deployable units. When deploying a database, it operates within these Pods. Each Pod can accommodate one or more containers, with the container in question hosting the database software.
- ⮕ Persistent Volumes (PV): Databases necessitate storage for data preservation. In Kubernetes, this essential storage is supplied through Persistent Volumes (PV). These resources offer storage capacity, assuring data integrity even in cases of Pod restarts or deletions.
- ⮕ Kubernetes Services: Following the deployment and operation of the database within a Pod, there arises a need for accessibility by other applications or users. Kubernetes Services step in to expose the database, establishing the means for network access to one or more Pods, thereby ensuring the database’s accessibility.