In this post I am providing a guide (with scripts) on how to install a 3 node
Kubernetes cluster on bare metal hypervisor ESXI 6.5
- These scripts are for RHEL 8/CentOS 8/Oracle Linux 8 systems
Hypervisor
Hardware Specs
- Dell PowerEdge R710
- 2x Intel(R) Xeon(R) CPU X5570 @ 2.93GHz
- 48GB memory
- HDD (1x 500GB SSD, 1x 240 GB SSD)
- HDD (1x 300GB 10K SAS)
- HDD RAID-1 (2x 300GB 10K SAS)
- HDD RAID-0 (3x 146GB 10K SAS)
OS
- ESXi-6.5.0 (Update 3)
VM Layout
Setup sequence ...
- Install Docker (On Master and all Worker nodes)
- Configure Prerequisites (SELinux/firewall/iptables etc...) (On Master and all Worker nodes)
- Install Kubernetes via package repo (On Master and all Worker nodes)
- Configure master node to achieve the below...
- Configuring firewall ports for Kubernetes and Docker
- Initializing master node
- Install Calico container network interface plugin for Kubernetes
- Note down the token returned by --> kubeadm init
- Join worker nodes to master
kubectl get nodes -o wide
| NAME | STATUS | ROLES | AGE | VERSION | INTERNAL-IP | KERNEL-VERSION | CONTAINER-RUNTIME |
|---|---|---|---|---|---|---|---|
| k8s-master | Ready | control-plane,master | 94d | v1.20.2 | 192.168.1.104 | 4.18.0-240.22.1.el8_3.x86_64 | docker://20.10.5 |
| k8s-worker1 | Ready | 94d | v1.20.2 | 192.168.1.105 | 4.18.0-240.22.1.el8_3.x86_64 | docker://20.10.5 | |
| k8s-worker2 | Ready | 94d | v1.20.2 | 192.168.1.106 | 4.18.0-240.22.1.el8_3.x86_64 | docker://20.10.5 |
In the next 2 posts I will walk you through on how to change the container
runtime from docker to..