Kubernetes Install(5 Node = 3 Master + 2 Worker) With Kubespray on Ubuntu22LTS

fatlan@kube-master01:~$ kubectl get nodes -o wide
NAME            STATUS   ROLES                  AGE     VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION     CONTAINER-RUNTIME
kube-master01   Ready    control-plane,master   5h51m   v1.26.1   10.10.10.191  <none>        Ubuntu 22.04 LTS     5.4.0-89-generic   containerd://1.6.9
kube-master02   Ready    control-plane,master   5h51m   v1.26.1   10.10.10.192  <none>        Ubuntu 22.04 LTS     5.4.0-89-generic   containerd://1.6.9
kube-master03   Ready    control-plane,master   5h51m   v1.26.1   10.10.10.193  <none>        Ubuntu 22.04 LTS     5.4.0-89-generic   containerd://1.6.9
kube-worker01   Ready    <none>                 5h50m   v1.26.1   10.10.10.194  <none>        Ubuntu 22.04 LTS     5.4.0-89-generic   containerd://1.6.9
kube-worker02   Ready    <none>                 5h50m   v1.26.1   10.10.10.195  <none>        Ubuntu 22.04 LTS     5.4.0-89-generic   containerd://1.6.9

All host run

You must change $USER with real user

sudo echo "$USER ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/$USER

Ansible client run(10.10.10.191)

ssh-keygen
ssh-copy-id $USER@10.10.10.191
ssh-copy-id $USER@10.10.10.192
ssh-copy-id $USER@10.10.10.193
ssh-copy-id $USER@10.10.10.194
ssh-copy-id $USER@10.10.10.195

git clone https://github.com/kubernetes-sigs/kubespray.git

cd kubespray/

sudo apt update && sudo apt install python3-pip -y

cat requirements.txt

sudo pip3 install -r requirements.txt

cp -rfp inventory/sample inventory/mycluster

declare -a IPS=(10.10.10.191 10.10.10.192 10.10.10.193 10.10.10.194 10.10.10.195)

CONFIG_FILE=inventory/mycluster/hosts.yaml python3 contrib/inventory_builder/inventory.py ${IPS[@]}

Change below host names

vi inventory/mycluster/hosts.yaml

all:
  hosts:
    kube-master01:
      ansible_host: 10.10.10.191
      ip: 10.10.10.191
      access_ip: 10.10.10.191
    kube-master02:
      ansible_host: 10.10.10.192
      ip: 10.10.10.192
      access_ip: 10.10.10.192
    kube-master03:
      ansible_host: 10.10.10.193
      ip: 10.10.10.193
      access_ip: 10.10.10.193
    kube-worker01:
      ansible_host: 10.10.10.194
      ip: 10.10.10.194
      access_ip: 10.10.10.194
    kube-worker02:
      ansible_host: 10.10.10.195
      ip: 10.10.10.195
      access_ip: 10.10.10.195
  children:
    kube-master:
      hosts:
        kube-master01:
        kube-master02:
        kube-master03:
    kube-node:
      hosts:
        kube-master01:
        kube-master02:
        kube-master03:
        kube-worker01:
        kube-worker02:
    etcd:
      hosts:
        kube-master01:
        kube-master02:
        kube-master03:
    k8s-cluster:
      children:
        kube-master:
        kube-node:
    calico-rr:
      hosts: {}

Aşağıda cat ettiiğimiz dosyaları edit edip, parametrik değerleri değiştirebilirsiniz Network plugin, pod subneti, domain, container runtime vs. gibi bilgiler değiştirebilirsiniz

cat inventory/mycluster/group_vars/k8s_cluster/k8s-cluster.yml

cat inventory/mycluster/group_vars/k8s_cluster/addons.yml

cat inventory/mycluster/group_vars/all/all.yml

cat cluster.yml

Kurulumu başlatalım

ansible-playbook -i inventory/mycluster/hosts.yaml --become --become-user=root cluster.yml

#only single machine run, --limit <hostname or ip>

You must change $USER with real user

mkdir -p .kube

sudo cp /etc/kubernetes/admin.conf .kube/

sudo chown $USER:$USER .kube/admin.conf

export KUBECONFIG=$PWD/.kube/admin.conf

kubectl get nodes -o wide

Node before reboot if you use swap area, edit .profile or .bashrc and cron or rc.local or systemd service script run after restart

Ama en geçerli yöntem swap'sız makine kurulumudur.

ALL NODE

swapoff -a

ONLY MASTER/S NODE

swapoff -a
export KUBECONFIG=$PWD/.kube/admin.conf

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