#INSTALLING NEBULA 3 INSTALL#

Prepare local disks and install local volume plugin.

The operation system is CentOS- x86_64.ДЇollowing is the cluster topology: Server IP.

#INSTALLING NEBULA 3 SOFTWARE#

The following list is software and hardware requirements involved in the deployment in this post:

Deploy Software and Hardware Requirements We will show you the details onВ deploying Nebula Graph with Kubernetes in the following part.

Kubernetes scales the cluster horizontally based on the cluster utility to improve the nebula performance.

Kubernetes can restart the crashed single replica without operations engineer.

#INSTALLING NEBULA 3 UPGRADE#

Kubernetes can deploy Nebula Graph cluster within seconds and upgrade cluster automatically without perception.

KubernetesВ encapsulateВ the details of the underlying storage by storageclass, pvc and pv, no matter what kind of storage-system such as cloud-disk or local-disk.

The three can discover each other by the dns service provided by Kubernetes.

Kubernetes adjust the workload between the different replicas of the graphd, metad and storaged.

Kubernetes brings the following benefits to Nebula Graph: Nebula Graph is a distributed, open source graph database that is comprised of graphd (the query engine), storaged (data storage) and metad (meta data).

Horizontal scalability: Kubernetes can scale the replicas based on the resource utilization of the current database cluster, thereby improving resource utilization rateД¬urrently many databases such as MySQL, MongoDB and TiDB all work fine on Kubernetes.

Load balancing: Kubernetes Service provides load-balance by distributing external network traffic evenly to different database replications.

Storage management: Kubernetes provides various solutions on storage management so that databases can adopt different storage systems transparently.

Fault recovery: Kubernetes restarts database applications when that fail, or migrates database to other health nodes in the cluster.

Fluentd-elasticsearch provides cluster log collection, storage and queryДatabase containerization is a hot topic recently, and what benefits can Kubernetes bring to databases?.

Federation provides clusters management across Availability Zones.

Ingress Controller provides external network access for services.

kube-dns is responsible for providing DNS services for the entire cluster.

In addition to the core components, there are some recommended Add-ons:

kube-proxy is responsible for providing service discovery and load balancing within the cluster for the kubernetes-service.

Container runtime is responsible for image management and the runtime of the Pod and container (CRI).

kubelet is responsible for maintaining the life cycle of the container, and is also responsible for the management of Volume and Network.

scheduler is responsible for scheduling resources, and scheduling Pods to corresponding machines according to a predetermined scheduling policy.

controller manager is responsible for maintaining the state of the cluster, such as fault detection, automatic expansion, rolling updates, etc.

apiserver provides a unique entry for resource operations and provides mechanisms for authentication, authorization, access control, API registration, and discovery.

etcd is used as KubernetesвЂ™ backing store for all cluster data.

Kubernetes consists mainly of the following core components: The scalability of the system is largely provided by the Kubernetes API which is used mainly as a scalable internal component and as a container running on Kubernetes. The components are designed to be loosely coupled and scalable so that they can meet various kinds of workloads.

#INSTALLING NEBULA 3 SERIES#

Kubernetes has a series of components architecturally, enabling a mechanism that can provide deployment, maintenance, and extension of applications. Kubernetes (commonly stylized as k8s) is an open-source container-orchestration system, aiming to provide a simple yet efficient platform forВ automating deployment, scaling, and operations of application containers across clusters of hosts.

Installing nebula 3