Kubernetes Cluster Setup (v1.27.1)with containerd

Kubernetes Cluster Setup (v1.27.1




sudo apt-get update && apt-get upgrade -y
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Load the Kernel modules on all the nodes


sudo tee /etc/modules-load.d/containerd.conf <<EOF
overlay
br_netfilter
EOF


sudo modprobe overlay
sudo modprobe br_netfilter


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Set the following Kernel params for K8s


sudo tee /etc/sysctl.d/kubernetes.conf <<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
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Reload the system changes
sudo sysctl --system


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Install containerd run time


sudo apt install -y curl gnupg2 software-properties-common apt-transport-https ca-certificates


sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/docker.gpg


sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"


sudo apt update
sudo apt install -y containerd.io


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Configure containerd using systemd as cgroup


containerd config default | sudo tee /etc/containerd/config.toml >/dev/null 2>&1


sudo sed -i 's/SystemdCgroup \= false/SystemdCgroup \= true/g' /etc/containerd/config.toml


sudo systemctl restart containerd
sudo systemctl enable containerd


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Add apt repository for k8s


curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
sudo apt-add-repository "deb https://apt.kubernetes.io/ kubernetes-xenial main"


sudo apt update
sudo apt install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl


kubeadm init?


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Install Pod Network addon:


curl https://raw.githubusercontent.com/projectcalico/calico/v3.25.1/manifests/calico.yaml -O

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root@master01:~# kubectl get pods -n kube-syste
NAME? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?READY? ?STATUS? ? RESTARTS? ?AGE
calico-kube-controllers-674fff74c8-9z5m2? ?1/1? ? ?Running? ?0? ? ? ? ? 39m
calico-node-s5vsp? ? ? ? ? ? ? ? ? ? ? ? ? 1/1? ? ?Running? ?0? ? ? ? ? 39m
calico-node-sd8dk? ? ? ? ? ? ? ? ? ? ? ? ? 1/1? ? ?Running? ?0? ? ? ? ? 31m
coredns-5d78c9869d-hzm9p? ? ? ? ? ? ? ? ? ?1/1? ? ?Running? ?0? ? ? ? ? 40m
coredns-5d78c9869d-s9j8r? ? ? ? ? ? ? ? ? ?1/1? ? ?Running? ?0? ? ? ? ? 40m
etcd-master01? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1/1? ? ?Running? ?0? ? ? ? ? 40m
kube-apiserver-master01? ? ? ? ? ? ? ? ? ? 1/1? ? ?Running? ?0? ? ? ? ? 40m
kube-controller-manager-master01? ? ? ? ? ?1/1? ? ?Running? ?0? ? ? ? ? 40m
kube-proxy-sk6l7? ? ? ? ? ? ? ? ? ? ? ? ? ?1/1? ? ?Running? ?0? ? ? ? ? 40m
kube-proxy-w9t9w? ? ? ? ? ? ? ? ? ? ? ? ? ?1/1? ? ?Running? ?0? ? ? ? ? 31m
kube-scheduler-master01? ? ? ? ? ? ? ? ? ? 1/1? ? ?Running? ?0? ? ? ? ? 40mm
        

root@master01:~# kubectl get pods -o wid
NAME? ? ? ? ? ? ? ? ? ?READY? ?STATUS? ? RESTARTS? ?AGE? ?IP? ? ? ? ? ? ? ?NODE? ? ?NOMINATED NODE? ?READINESS GATES
abc-7d7574dbff-t7wjw? ?1/1? ? ?Running? ?0? ? ? ? ? 31m? ?192.168.171.65? ?worker? ?<none>? ? ? ? ? ?<none>
xyz-5f98d7fcbb-bbfrr? ?1/1? ? ?Running? ?0? ? ? ? ? 8s? ? 192.168.171.66? ?worker? ?<none>? ? ? ? ? ?<none>
root@master01:~#

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