– Container is a standardized unit of software that contains the source code and dependencies needed to run an application or service.

– Docker is a platform and tool for packaging an application into a container, automating the deployment of a container application from one environment to another, ensuring that the application works stably and consistently.

– Kubernetes is not responsible for creating containers by itself; its most important purpose is orchestrating, scheduling, and managing the state of containers when scaling deployment with the requirement to coordinate multiple containers working together to distribute distribute individual services on a physical or virtualized infrastructure.

– vOKS provides customers with Kubernetes clusters with a choice of 01 Master Node or 03 Master Nodes with Loadbalancer to improve service availability; Worker Nodes can expand to an unlimited number:

* Master Node: a VM, containing all the logic components to coordinate the activities of the Worker Nodes and define, deploy, and manage the lifecycle of the containers running on the Worker Node.

* Worker Node: Containerized applications will deploy on Worker Nodes. In each vOKS service package, Viettel IDC provides at least 03 Worker Nodes in order to improve fault tolerance and availability when deploying applications.

– NFS Node – Persistent Storage: a NFS Server (Network File System) used as a protocol to connect containers running in Worker Node to an independent data storage area (Persistent Storage).

– Node Storage has a fixed capacity of 50 GB (SSD), used to store data (cache form) of the container during operation. This data is only saved temporarily and will be deleted when the user restarts/reschedules the containers.

– On the other hand, the container’s data during operation is stored on its own storage area (Persistent Storage) and will be retained when the containers are restarted/rescheduled; this data can be transferred between containers.

– Customers can easily use all existing plugins or tools developed and contributed by the Kubernetes community. Also, applications running on any standard Kubernetes environment on other Cloud infrastructure (AWS, Microsoft Azure, etc.) or On-Premise Data Center are compatible and easily migrated to Viettel IDC’s vOKS service.