Tag: Kubernetes
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VKS Cluster YAML Edits That Change a Live Deployment (VCAP-VKS Exam Series, Part 29)
Objective 4.14 in practice: which fields in a VKS cluster manifest you may edit, which edits roll every node, which the admission webhook refuses, and how to force a redeployment when an accepted edit never reaches the nodes.
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VKS Cluster Autoscaler Install, Configuration and Upgrade (VCAP-VKS Exam Series, Part 22)
Objective 4.7 asks you to create, configure and upgrade autoscalers on VKS. This Part builds an autoscaled cluster from annotations, installs the package, measures six real scale up events, and walks the pause and repin sequence that an autoscaled upgrade demands.
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VKS Cluster Rolling Updates and Configuration Changes (VCAP-VKS Exam Series, Part 21)
A rolling update on a VKS cluster behaves differently depending on whether you changed the Kubernetes version or a configuration variable. Part 21 runs both against the reference estate, shows the output that lies to you, and covers objective 4.6.
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VKS Cluster Provisioning, Monitoring and Scaling Commands (VCAP-VKS Exam Series, Part 20)
Objective 4.5 asks you to provision, delete, monitor and scale VKS clusters with kubectl and the VCF CLI. Here is the full lifecycle on a VCF 9.0 estate, with the operations the Supervisor refuses and the one the VCF CLI cannot do at all.
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vSphere Pod and VM Service Workload Deployment on a Supervisor (VCAP-VKS Exam Series, Part 18)
Objective 4.3 as one lab: a vSphere Pod and a VM Service virtual machine dropped into the same vSphere Namespace on VCF 9.0, with the real errors each model throws and the Supervisor setting sitting behind them.
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VKS Content Libraries and Kubernetes Releases, Subscribed, Local and Air-Gapped (VCAP-VKS Exam Series, Part 9)
A subscribed library, a local library for the air gapped case, and the VKr naming rule that decides whether kubectl get kr shows anything at all. Objective 2.5 for 3V0-24.25, run against a VCF 9.0 Supervisor.
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Kubernetes Architecture, Networking, Storage, Service Mesh and Helm (VCAP-VKS Exam Series, Part 3)
Objective 1.2 does not test Kubernetes trivia. It tests whether you can look at a VKS cluster and name the vSphere object that created what you are seeing. Four kubectl commands, two real failures, and the inheritance map that makes the rest of the blueprint readable.
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Migrating a Stateless Application End to End (TKGI to OpenShift Series, Part 18)
Moving your first stateless namespace off TKGI is less about Velero than about what OpenShift admission does to the pods when they land. Here is the whole loop, including a restore that reported success while nothing started.
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Network Policy and Microsegmentation, NSX-T DFW to OVN-Kubernetes (TKGI to OpenShift Series, Part 16)
Your NSX-T distributed firewall holds far more rules than kubectl will ever show you. Here is the DFW to OVN-Kubernetes mapping, a namespace baseline that does not break DNS, and where AdminNetworkPolicy actually belongs.
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OpenShift Projects, Quotas and MachineSet Scaling (TKGI to OpenShift Series, Part 14)
TKGI gave every team a cluster and a plan. OpenShift gives them a Project, a quota and a share of one node pool. Here is the runbook that makes that swap, with the project request template, the vSphere MachineSet, the autoscaler pair and the quota rejection that took out a whole migration wave.
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Cluster Networking, OVN-Kubernetes, Routes and Load Balancing (TKGI to OpenShift Series, Part 13)
On TKGI the NSX Container Plugin handed every LoadBalancer service a virtual server. OpenShift on vSphere does not. This Part wires Routes, ingress shards, MetalLB address pools and EgressIP on the cluster Part 12 installed.
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Networking Assessment, NSX-T and NCP to OVN-Kubernetes (TKGI to OpenShift Series, Part 8)
NCP gave every TKGI namespace its own NSX-T segment, T1 router and SNAT IP, while OVN-Kubernetes gives you a flat overlay and a node IP. Here is the full capability mapping, and why egress identity is the rebuild that actually costs you.
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About the Author
Dr Pranay Jha
Dr. Pranay Jha is a Cloud and AI Consultant with 18+ years of experience in hybrid cloud, virtualization, and enterprise infrastructure transformation. He specializes in VMware technologies, multi-cloud strategy, and Generative AI solutions. He holds a PhD in Computer Applications with research focused on Cloud and AI, has published multiple research papers, and has been a VMware vExpert since 2016 and a VMUG Community Leader.
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