This repository is for deploying kubernetes on-permises cluster (bare-metal servers).
The kubernetes folder contains the files for preparing server to install kubernetes cluster or join to the cluster.
Please run the following script on all servers :
sudo ansible servers -m ping -i inventory.ini -u root
sudo ansible-playbook -i inventory.ini Kubernetes/ServerPrepare.yml -u root
Kubernetes Cluster :
The control-plane nodes addresses are :
192.168.56.120
192.168.56.121
192.168.56.122
The worker nodes addresses are :
192.168.56.123
192.168.56.124
The vms hosted on virtualbox are like the below schema :
HAProxy server (Load Balancer for kube apiserver) address is :
192.168.56.118
haproxy.cfg :
stats enable
(frontend bind to 192.168.56.118:6443)
(backend bind to 192.168.56.120:6443 192.168.56.121:6443 192.168.56.122:6443)
For starting a Kubernetes cluster, follow the below lines :
Run below scripts only on 192.168.56.120 :
sudo kubeadm init --control-plane-endpoint="192.168.56.118:6443"
--upload-certs --apiserver-advertise-address=192.168.56.120
--pod-network-cidr=192.168.0.0/16
--cri-socket=unix:///var/run/cri-dockerd.sock
--ignore-preflight-errors=all
And below code for all nodes :
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Install Calico network policy for on-premises deployments, 50 nodes or less :
curl https://raw.githubusercontent.com/projectcalico/calico/v3.27.2/manifests/calico.yaml -O
kubectl apply -f calico.yaml
and run the below on other servers to join to the cluster :
On control-plane (e.g. 192.168.56.122) :
kubeadm join 192.168.56.118:6443 --token c4c6wt.2rzubblajmxx7wf1 \
--discovery-token-ca-cert-hash sha256:91877d933445148c650e5fa11acca05d455fe1e9e53cd33f8497ad06a2126142 \
--control-plane --certificate-key 2e8c3d0a1f2d4aec3e4ccb09a0dd6f43756344269c0b414cdd83c0ef02c0293d \
--apiserver-advertise-address=192.168.56.122
--cri-socket=unix:///var/run/cri-dockerd.sock
--ignore-preflight-errors=all
On worker nodes :
kubeadm join 192.168.56.118:6443 --token c4c6wt.2rzubblajmxx7wf1 \
--discovery-token-ca-cert-hash sha256:91877d933445148c650e5fa11acca05d455fe1e9e53cd33f8497ad06a2126142 \
--cri-socket=unix:///var/run/cri-dockerd.sock
--ignore-preflight-errors=all
and at final step enjoy from your cluster :
kubectl get nodes -o wide
kubectl get pod -A
HAProxy Stats :
haproxy.cfg :
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