Table of contents
Windows Server Failover Cluster:
A failover cluster provides high availability for services and applications by allowing them to fail over from one node to another.
To create a failover cluster in Windows Server, follow these steps:
Verify Prerequisites:
Ensure that all servers you want to add as cluster nodes are running the same version of Windows Server.
Review hardware requirements to ensure your configuration is supported.
Install the Failover Clustering Feature:
- Install the Failover Clustering feature on every server you want to add as a cluster node.
Validate Configuration:
- Run the Cluster Validation Wizard to validate the configuration.
Create the Failover Cluster:
- Use the Create Cluster Wizard to create the failover cluster.
Create Clustered Roles:
- Create clustered roles to host cluster workloads.
Remember to join all servers to the same Active Directory domain and ensure they can access the storage.
Red Hat Cluster Configuration:
In Red Hat environments, cluster setup involves connecting nodes to specific hardware and configuring them within the cluster environment.
Tools are available for configuring and managing Red Hat Clusters.
Elasticsearch Cluster Setup:
- Setting up an Elasticsearch cluster involves critical steps and configurations.
High Availability/Clustering in Ubuntu and CentOS:
To set up a cluster, you need at least two servers.
For Ubuntu and CentOS, follow basic deployment, configuration, and maintenance steps for high availability/clustering
Networking in a Cluster
Kubernetes Cluster Networking:
In the Kubernetes ecosystem, networking plays a crucial role in enabling communication between various components.
Here are some key points related to Kubernetes cluster networking:
Pods: Pods are the fundamental units of deployment in Kubernetes. They group one or more containers together and share network and storage resources within the same context.
Container-to-Container Communication: Pods facilitate communication between tightly coupled containers running within them.
Network Plugins: Kubernetes supports various network plugins (such as Calico, Flannel, and Cilium) that handle networking between Pods, Services, and Nodes.
Services: Services provide stable network endpoints for Pods, allowing seamless communication across the cluster.
Ingress: Ingress controllers manage external access to services within the cluster.
Network Policies: These define rules for controlling traffic between Pods.
Cluster DNS: Kubernetes provides DNS resolution for service discovery.
CNI (Container Network Interface): CNI plugins handle network setup for Pods.
Node Communication: Nodes communicate with each other through the control plane, ensuring coordination and synchronization.
Load Balancing: Services distribute traffic across Pods.
Proxy Containers: The kube-proxy component manages network rules for Services.
Cluster Federation
Kubernetes Federation:
Kubernetes Federation allows you to manage multiple Kubernetes clusters as if they were a single, cohesive cluster.
Here are the key points about Federation:
Central Control Plane: In a federated cluster, a central control plane manages a group of child clusters. These child clusters can be located anywhere—on-premises, in different data centers, or across various cloud providers.
Single Control Point: Administrators can control and manage all clusters from a single point, simplifying operations and reducing complexity.
Shared Configuration: Federation enables sharing of configuration across clusters. The host cluster manages a master configuration, and parts of this configuration can be applied to any member clusters within the federation.
Resource Oversight: Resources configured to take advantage of federation treat all member clusters as a single distributed cluster, with oversight by the host cluster.
That's great if you have make till here you have covered Kubernetes Concept Cluster Setup and Configuration
If you liked what you read, do follow and any feedback for further improvement will be highly appreciated!
Thank you and Happy Learning!👏