Install Containerd, Kubectl and Kubeadm Packages in Master and Worker Nodes

After NFS server configuration, start installing Containerd, Kubectl and Kubeadm packages in Master and three Worker nodes.

To install the packages in the master and worker nodes, follow the steps below:

1. Open Linux Terminal, and run the following commands one by one on each node.

   apt-get update
   tee /etc/modules-load.d/containerd.conf <<EOF
    overlay
    br_netfilter
    EOF
   apt-get remove docker docker-engine docker.io containerd runc
   apt-get install ca-certificates curl gnupg lsb-release
   sudo mkdir -p /etc/apt/keyrings
   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
   echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
   apt-get update
   apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin
   docker -v
   systemctl status docker
   modprobe overlay
   modprobe br_netfilter
   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
   sysctl –-system
   add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
   apt update
   apt install -y containerd.io
   mkdir -p /etc/containerd
   containerd config default>/etc/containerd/config.toml
   systemctl restart containerd
   systemctl enable containerd
   systemctl status containerd
   apt-get update && apt-get install -y apt-transport-https ca-certificates curl
   curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
   echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
   KUBE_VERSION=1.23.0
   apt-get update
   apt-get install -y kubelet=${KUBE_VERSION}-00 kubeadm=${KUBE_VERSION}-00 kubectl=${KUBE_VERSION}-00 kubernetes-cni=0.8.7-00
   apt-mark hold kubelet kubeadm kubectl
   systemctl enable kubelet && systemctl start kubelet
   kubeadm version
   swapoff -a
   sed -i '/ swap / s/^/#/' /etc/fstab
   cd /etc/docker
   vi daemon.json
    { "exec-opts": ["native.cgroupdriver=systemd"] }
   systemctl daemon-reload
   systemctl restart docker
   systemctl restart kubelet
   systemctl status kubelet
   curl https://baltocdn.com/helm/signing.asc | gpg --dearmor | sudo tee /usr/share/keyrings/helm.gpg > /dev/null
   sudo apt-get install apt-transport-https --yes
   echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/helm.gpg] https://baltocdn.com/helm/stable/debian/ all main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list
   sudo apt-get update
   sudo apt-get install helm 

2. Configure NFS client.

   sudo apt install nfs-common
   cd /mnt
   mkdir adminui cognitivesearch ctrainer postgres postgresim producttriage share1 share2 share3 share4 share5 share6 txtai redis backupservice licenseserver
   chown nobody:nogroup adminui cognitivesearch ctrainer postgres postgresim producttriage share1 share2 share3 share4 share5 share6 txtai redis backupservice licenseserver
   chmod 777 adminui cognitivesearch ctrainer postgres postgresim producttriage share1 share2 share3 share4 share5 share6 txtai redis backupservice licenseserver
   mount 10.14.108.26:/mnt/nfsshare/postgres /mnt/postgres
   mount 10.14.108.26:/mnt/nfsshare/postgresim /mnt/postgresim
   mount 10.14.108.26:/mnt/nfsshare/adminui /mnt/adminui
   mount 10.14.108.26:/mnt/nfsshare/producttriage /mnt/producttriage
   mount 10.14.108.26:/mnt/nfsshare/cognitivesearch /mnt/cognitivesearch
   mount 10.14.108.26:/mnt/nfsshare/ctrainer /mnt/ctrainer
   mount 10.14.108.26:/mnt/nfsshare/share1 /mnt/share1
   mount 10.14.108.26:/mnt/nfsshare/share2 /mnt/share2
   mount 10.14.108.26:/mnt/nfsshare/share3 /mnt/share3
   mount 10.14.108.26:/mnt/nfsshare/share4 /mnt/share4
   mount 10.14.108.26:/mnt/nfsshare/share5 /mnt/share5
   mount 10.14.108.26:/mnt/nfsshare/share6 /mnt/share6
   mount 10.14.108.26:/mnt/nfsshare/txtai /mnt/txtai
   mount 10.14.108.26:/mnt/nfsshare/licenseserver /mnt/licenseserver
   mount 10.14.108.26:/mnt/nfsshare/backupservice /mnt/backupservice
   mount 10.14.108.26:/mnt/nfsshare/redis /mnt/redis
   Open /etc/fstab file and copy below lines.
   10.14.108.26:/mnt/nfsshare/postgres /mnt/postgres nfs defaults 0
   10.14.108.26:/mnt/nfsshare/postgresim /mnt/postgresim nfs defaults 0
   10.14.108.26:/mnt/nfsshare/adminui /mnt/adminui nfs defaults 0
   10.14.108.26:/mnt/nfsshare/producttriage /mnt/producttriage nfs defaults 0
   10.14.108.26:/mnt/nfsshare/cognitivesearch /mnt/cognitivesearch nfs defaults 0
   10.14.108.26:/mnt/nfsshare/ctrainer /mnt/ctrainer nfs defaults 0
   10.14.108.26:/mnt/nfsshare/share1 /mnt/share1 nfs defaults 0
   10.14.108.26:/mnt/nfsshare/share2 /mnt/share2 nfs defaults 0
   10.14.108.26:/mnt/nfsshare/share3 /mnt/share3 nfs defaults 0
   10.14.108.26:/mnt/nfsshare/share4 /mnt/share4 nfs defaults 0
   10.14.108.26:/mnt/nfsshare/share5 /mnt/share5 nfs defaults 0
   10.14.108.26:/mnt/nfsshare/share6 /mnt/share6 nfs defaults 0
   10.14.108.26:/mnt/nfsshare/txtai /mnt/txtai nfs defaults 0
   10.14.108.26:/mnt/nfsshare/licenseserver /mnt/licenseserver nfs defaults 0
   10.14.108.26:/mnt/nfsshare/share5 /mnt/share5 nfs defaults 0
   10.14.108.26:/mnt/nfsshare/ backupservice /mnt/ backupservice nfs defaults 0
   10.14.108.26:/mnt/nfsshare/redis /mnt/redis nfs defaults 0

   Note: 10.14.108.26 is the NFS Server and for any issues reach out to IntelliService DevOps team.