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Essential Steps for Preparing and Deploying OpenShift 4.10 Infrastructure on Vmware

Description:

1.vSphereEnvironment Readiness:

Ensure the vSphere environment is properly configured and meets the necessary requirements to deploy OpenShift. This involves setting up the required

virtualization infrastructure

a.       Hardware Setup

physical hardware setup required for the virtualization infrastructure, including server specifications, CPU, memory, and disk requirements. It also covers considerations for high availability and redundancy.

b.      Configuration

It includes the installation and configuration of the hypervisor software, network settings, and any required optimizations or adjustments to the virtualization environment.

SAN storage

a.        Switch zoning

It involves dividing a storage area network into isolated zones for improved security and performance.

b.      Storage configuration

configuring storage for OpenShift, including setting up storage classes, persistent volumes, and persistent volume claims

c.       CSI Driver Configuration

Configure the Container Storage Interface (CSI) driver to enable dynamic provisioning and management of persistent storage for containers within the OpenShift cluster. The CSI driver ensures efficient utilization of storage resources and simplifies storage management tasks.

 

Networking components

a)      IP Planning

Guides you through the process of planning IP addressing for the OpenShift deployment, including subnet allocation, IP ranges for nodes, services, and pods. It explains the importance of IP planning to ensure proper communication and connectivity within the cluster.

b)      DNS

DNS (Domain Name System) in an OpenShift deployment and provides instructions for configuring DNS resolution for the cluster. It covers considerations for internal and external DNS, as well as configuring DNS records for applications and services

c)       Loadbalancer

load balancer in an OpenShift deployment and its importance in distributing incoming network traffic across multiple backend nodes or services. It explains how load balancing improves scalability, availability, and performance of applications running on the cluster.

Security

a.       Security Whitelisting

It includes instructions for configuring whitelists for network access, restricting incoming and outgoing traffic, and implementing security policies to control access to the cluster

b.      SOC compliance

It covers security measures, logging and auditing, access controls, and compliance reporting.

 

2. Configure NFS:

Set up and configure the Network File System (NFS) to provide shared storage for the OpenShift cluster. NFS allows multiple nodes within the cluster to access and share the same files, ensuring consistency and data availability.

 

3. Configure FTP:

Implement and configure the File Transfer Protocol (FTP) server to enable secure file transfer capabilities within the OpenShift environment. FTP is commonly used for transferring files between systems and can be integrated with OpenShift to facilitate data exchange.

 

4. Configure Bastion:

Set up a secure Bastion host to provide a controlled and monitored entry point into the OpenShift environment. The Bastion host acts as a gateway for administrators to access and manage the cluster securely.

 

5. Configure OCP Cluster:

Deploy and configure the OpenShift Container Platform (OCP) cluster, which serves as the foundation for running containerized applications. This involves installing and configuring the necessary components, such as the

Master Nodes:

Master nodes in OpenShift are responsible for managing and controlling the cluster. They oversee the overall cluster state, handle scheduling of pods and services, maintain cluster metadata, and manage authentication and authorization. Master nodes run critical components such as the API server, controller manager, and etcd, which stores the cluster's configuration and state information. These nodes play a crucial role in the stability and operation of the OpenShift cluster.

Infra Nodes:

 Infra nodes, also known as infrastructure nodes, are dedicated nodes within an OpenShift cluster that handle specific infrastructure-related tasks. These nodes are responsible for running router and registry services, enabling external access to applications, and facilitating image storage and distribution. Infra nodes help optimize resource allocation by offloading these tasks from worker nodes, ensuring efficient application deployment and scaling within the cluster.

OCS/ODF Nodes: OCS (OpenShift Container Storage) or ODF (OpenShift Data Foundation) nodes

refer to nodes specifically allocated for hosting persistent storage solutions in an OpenShift cluster. OCS provides a software-defined storage solution for containerized applications, offering features such as dynamic provisioning of storage volumes, replication, and encryption. ODF is an integrated data services platform that combines OCS with other data services like NoSQL databases and messaging systems. OCS/ODF nodes are responsible for providing and managing persistent storage resources required by applications running in the cluster.

6. Configure Worker Node Addition:

Expand the OCP cluster by adding worker nodes to increase the capacity and compute resources available for running applications. Proper configuration and integration of the worker nodes ensure seamless scalability and distribution of workloads across the cluster.

Steps Involved as follows:

a.       Physical Host configuration

b.       OS layer configuration

c.       Licenses Subscription for CP4A

d.       Licenses Subscription for CP4I

e.       OpenShift pre-req for node addition

f.        Node addition into OpenShift

7. Configure ELK for OCP:

Implement and configure the Elastic Stack (ELK) for OpenShift, which comprises Elasticsearch, Logstash, and Kibana. ELK enables centralized logging, monitoring, and analysis of containerized application logs, providing valuable insights into the cluster's performance and troubleshooting capabilities.

 

8. Configure MongoDB:

Set up and configure MongoDB, a popular NoSQL database, within the OpenShift environment. MongoDB provides a flexible and scalable data storage solution for applications running on OpenShift.

 

9. Configure Db2:

Configure Db2, an enterprise-class relational database management system (RDBMS), for use with OpenShift. Db2 offers robust data management capabilities and can be integrated into OpenShift applications seamlessly.

11. Configure CP4A and CP4i:

Set up and configure Cloud Pak for Automation (CP4A) and Cloud Pak for Integration (CP4i) within the OpenShift environment. CP4A provides a comprehensive platform for developing and deploying business process automation solutions, while CP4i offers tools for integrating applications and systems.


12. Configure IAM Administration:

Implement and configure Identity and Access Management (IAM) administration for OpenShift, ensuring secure user authentication, role-based access control, and fine-grained permissions. IAM administration helps enforce security policies and govern access to resources within the OpenShift environment.

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