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add kubernetes-lite
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James Turland
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223
Kubernetes/Kubernetes-Lite/k3s.sh
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Kubernetes/Kubernetes-Lite/k3s.sh
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#!/bin/bash
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echo -e " \033[33;5m __ _ _ ___ \033[0m"
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echo -e " \033[33;5m \ \(_)_ __ ___( )__ / _ \__ _ _ __ __ _ __ _ ___ \033[0m"
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echo -e " \033[33;5m \ \ | '_ \` _ \/ __| / /_\/ _\` | '__/ _\` |/ _\` |/ _ \ \033[0m"
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echo -e " \033[33;5m /\_/ / | | | | | \__ \ / /_\\ (_| | | | (_| | (_| | __/ \033[0m"
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echo -e " \033[33;5m \___/|_|_| |_| |_|___/ \____/\__,_|_| \__,_|\__, |\___| \033[0m"
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echo -e " \033[33;5m |___/ \033[0m"
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echo -e " \033[36;5m _ _________ ___ _ _ _ \033[0m"
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echo -e " \033[36;5m | |/ |__ / __| |_ _|_ _ __| |_ __ _| | | \033[0m"
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echo -e " \033[36;5m | ' < |_ \__ \ | || ' \(_-| _/ _\` | | | \033[0m"
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echo -e " \033[36;5m |_|\_|___|___/ |___|_||_/__/\__\__,_|_|_| \033[0m"
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echo -e " \033[36;5m \033[0m"
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echo -e " \033[32;5m https://youtube.com/@jims-garage \033[0m"
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echo -e " \033[32;5m \033[0m"
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#############################################
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# YOU SHOULD ONLY NEED TO EDIT THIS SECTION #
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#############################################
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# This is an update version of the K3S script that install longhorn on the worker nodes.
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# The worker nodes are scaled to 3 for redundancy and HA
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# This has the added benefit of using local storage on worker nodes (faster)
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# Version of Kube-VIP to deploy
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KVVERSION="v0.6.3"
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# K3S Version
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k3sVersion="v1.26.10+k3s2"
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# Set the IP addresses of the master and work nodes
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master1=192.168.3.21
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master2=192.168.3.22
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master3=192.168.3.23
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worker1=192.168.3.24
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worker2=192.168.3.25
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worker3=192.168.3.26
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# User of remote machines
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user=ubuntu
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# Interface used on remotes
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interface=eth0
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# Set the virtual IP address (VIP)
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vip=192.168.3.50
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# Array of master nodes
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masters=($master2 $master3)
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# Array of worker nodes
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workers=($worker1 $worker2 $worker3)
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# Array of all
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all=($master1 $master2 $master3 $worker1 $worker2 $worker3)
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# Array of all minus master
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allnomaster1=($master2 $master3 $worker1 $worker2 $worker3)
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#Loadbalancer IP range
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lbrange=192.168.3.60-192.168.3.80
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#ssh certificate name variable
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certName=id_rsa
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#############################################
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# DO NOT EDIT BELOW #
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#############################################
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# For testing purposes - in case time is wrong due to VM snapshots
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sudo timedatectl set-ntp off
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sudo timedatectl set-ntp on
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# Move SSH certs to ~/.ssh and change permissions
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cp /home/$user/{$certName,$certName.pub} /home/$user/.ssh
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chmod 600 /home/$user/.ssh/$certName
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chmod 644 /home/$user/.ssh/$certName.pub
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# Install k3sup to local machine if not already present
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if ! command -v k3sup version &> /dev/null
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then
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echo -e " \033[31;5mk3sup not found, installing\033[0m"
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curl -sLS https://get.k3sup.dev | sh
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sudo install k3sup /usr/local/bin/
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else
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echo -e " \033[32;5mk3sup already installed\033[0m"
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fi
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# Install Kubectl if not already present
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if ! command -v kubectl version &> /dev/null
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then
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echo -e " \033[31;5mKubectl not found, installing\033[0m"
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curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
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sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl
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else
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echo -e " \033[32;5mKubectl already installed\033[0m"
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fi
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# Create SSH Config file to ignore checking (don't use in production!)
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echo "StrictHostKeyChecking no" > ~/.ssh/config
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#add ssh keys for all nodes
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for node in "${all[@]}"; do
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ssh-copy-id $user@$node
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done
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# Install policycoreutils for each node
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for newnode in "${all[@]}"; do
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ssh $user@$newnode -i ~/.ssh/$certName sudo su <<EOF
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NEEDRESTART_MODE=a apt install policycoreutils -y
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exit
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EOF
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echo -e " \033[32;5mPolicyCoreUtils installed!\033[0m"
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done
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# Step 1: Bootstrap First k3s Node
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mkdir ~/.kube
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k3sup install \
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--ip $master1 \
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--user $user \
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--tls-san $vip \
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--cluster \
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--k3s-version $k3sVersion \
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--k3s-extra-args "--disable traefik --disable servicelb --flannel-iface=$interface --node-ip=$master1 --node-taint node-role.kubernetes.io/master=true:NoSchedule" \
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--merge \
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--sudo \
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--local-path $HOME/.kube/config \
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--ssh-key $HOME/.ssh/$certName \
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--context k3s-ha
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echo -e " \033[32;5mFirst Node bootstrapped successfully!\033[0m"
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# Step 2: Install Kube-VIP for HA
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kubectl apply -f https://kube-vip.io/manifests/rbac.yaml
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# Step 3: Download kube-vip
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curl -sO https://raw.githubusercontent.com/JamesTurland/JimsGarage/main/Kubernetes/K3S-Deploy/kube-vip
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cat kube-vip | sed 's/$interface/'$interface'/g; s/$vip/'$vip'/g' > $HOME/kube-vip.yaml
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# Step 4: Copy kube-vip.yaml to master1
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scp -i ~/.ssh/$certName $HOME/kube-vip.yaml $user@$master1:~/kube-vip.yaml
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# Step 5: Connect to Master1 and move kube-vip.yaml
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ssh $user@$master1 -i ~/.ssh/$certName <<- EOF
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sudo mkdir -p /var/lib/rancher/k3s/server/manifests
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sudo mv kube-vip.yaml /var/lib/rancher/k3s/server/manifests/kube-vip.yaml
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EOF
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# Step 6: Add new master nodes (servers) & workers
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for newnode in "${masters[@]}"; do
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k3sup join \
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--ip $newnode \
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--user $user \
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--sudo \
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--k3s-version $k3sVersion \
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--server \
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--server-ip $master1 \
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--ssh-key $HOME/.ssh/$certName \
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--k3s-extra-args "--disable traefik --disable servicelb --flannel-iface=$interface --node-ip=$newnode --node-taint node-role.kubernetes.io/master=true:NoSchedule" \
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--server-user $user
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echo -e " \033[32;5mMaster node joined successfully!\033[0m"
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done
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# add workers
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for newagent in "${workers[@]}"; do
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k3sup join \
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--ip $newagent \
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--user $user \
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--sudo \
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--k3s-version $k3sVersion \
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--server-ip $master1 \
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--ssh-key $HOME/.ssh/$certName \
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--k3s-extra-args "--node-label \"longhorn=true\" --node-label \"worker=true\""
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echo -e " \033[32;5mAgent node joined successfully!\033[0m"
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done
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# Step 7: Install kube-vip as network LoadBalancer - Install the kube-vip Cloud Provider
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kubectl apply -f https://raw.githubusercontent.com/kube-vip/kube-vip-cloud-provider/main/manifest/kube-vip-cloud-controller.yaml
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# Step 8: Install Metallb
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kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.12.1/manifests/namespace.yaml
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kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.13.12/config/manifests/metallb-native.yaml
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# Download ipAddressPool and configure using lbrange above
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curl -sO https://raw.githubusercontent.com/JamesTurland/JimsGarage/main/Kubernetes/K3S-Deploy/ipAddressPool
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cat ipAddressPool | sed 's/$lbrange/'$lbrange'/g' > $HOME/ipAddressPool.yaml
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# Step 9: Test with Nginx
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kubectl apply -f https://raw.githubusercontent.com/inlets/inlets-operator/master/contrib/nginx-sample-deployment.yaml -n default
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kubectl expose deployment nginx-1 --port=80 --type=LoadBalancer -n default
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echo -e " \033[32;5mWaiting for K3S to sync and LoadBalancer to come online\033[0m"
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while [[ $(kubectl get pods -l app=nginx -o 'jsonpath={..status.conditions[?(@.type=="Ready")].status}') != "True" ]]; do
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sleep 1
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done
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# Step 10: Deploy IP Pools and l2Advertisement
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kubectl wait --namespace metallb-system \
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--for=condition=ready pod \
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--selector=component=controller \
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--timeout=120s
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kubectl apply -f ipAddressPool.yaml
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kubectl apply -f https://raw.githubusercontent.com/JamesTurland/JimsGarage/main/Kubernetes/K3S-Deploy/l2Advertisement.yaml
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kubectl get nodes
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kubectl get svc
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kubectl get pods --all-namespaces -o wide
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echo -e " \033[32;5mHappy Kubing! Access Nginx at EXTERNAL-IP above\033[0m"
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# Step 11: Install Longhorn (using modified Official to pin to Longhorn Nodes)
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kubectl apply -f https://raw.githubusercontent.com/JamesTurland/JimsGarage/main/Kubernetes/Longhorn/longhorn.yaml
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kubectl get pods \
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--namespace longhorn-system \
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--watch
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# Step 12: Print out confirmation
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kubectl get nodes
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kubectl get svc -n longhorn-system
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echo -e " \033[32;5mHappy Kubing! Access Longhorn through Rancher UI\033[0m"
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