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Fatih ASLAN
Fatih ASLAN

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Kubernetes Install (5Node=3Master+2Worker) With Kubespray on Ubuntu20LTS

#kubernetes #kubespray #ubuntu #linux

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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 v1.22.2 10.10.10.191 <none> Ubuntu 20.04.3 LTS 5.4.0-89-generic docker://20.10.9 kube-master02 Ready control-plane,master 5h51m v1.22.2 10.10.10.192 <none> Ubuntu 20.04.3 LTS 5.4.0-89-generic docker://20.10.9 kube-master03 Ready control-plane,master 5h51m v1.22.2 10.10.10.193 <none> Ubuntu 20.04.3 LTS 5.4.0-89-generic docker://20.10.9 kube-worker01 Ready <none> 5h50m v1.22.2 10.10.10.194 <none> Ubuntu 20.04.3 LTS 5.4.0-89-generic docker://20.10.9 kube-worker02 Ready <none> 5h50m v1.22.2 10.10.10.195 <none> Ubuntu 20.04.3 LTS 5.4.0-89-generic docker://20.10.9
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Tüm hostlarda çalıştırılır
$USER aktif kullanıcı ile değiştirilir

sudo echo "$USER ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/$USER
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Ansible client makinesinde çalıştırılmalı(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
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git clone https://github.com/kubernetes-sigs/kubespray.git
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cd kubespray/ sudo apt install python3-pip 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[@]}
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Aşağıdaki hostname'leri kendi yapınıza göre değiştirebilirsiniz

vi kubespray/inventory/mycluster/hosts.yaml
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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: {}
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cat kubespray/inventory/mycluster/group_vars/all/all.yml cat kubespray/cluster.yml cat kubespray/inventory/mycluster/group_vars/k8s_cluster/k8s-cluster.yml
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ansible-playbook -i inventory/mycluster/hosts.yaml --become --become-user=root cluster.yml #Sadece tek makinede çalıştırmak için parametreyi kullanabilirsiniz, --limit <hostname or ip>
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$USER aktif kullanıcı ile değiştirilir

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
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Node'ler reboot olduktan sonra eğer swap alanı kullanılıyorsa, .profile ya da .bashrc düzenleyebilirsiniz
ve node'ler reboot olunca cron ya da rc.local ya da systemd servis script dosyası oluşturabilirsiniz

Tüm NODE

swapoff -a export LC_ALL=C
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Sadece MASTER/S NODE

swapoff -a export KUBECONFIG=$PWD/.kube/admin.conf export LC_ALL=C
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ref: 1

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