Quick Start - Installing Rancher RKE2

Описание: This guide will help you quickly install a cluster with default options.

Installing Rancher RKE2 involves setting up the RKE2 Kubernetes cluster and then deploying the Rancher management server on top of it.

Here are the steps-by-step commands featured in my video.

For ALL Nodes (3 Control Plane + 1 Worker):
-------------------------------------------
These commands are needed on all 4 nodes.

sudo apt update && sudo apt upgrade -y
sudo apt install -y curl wget gnupg2 software-properties-common
sudo timedatectl set-ntp true
sudo swapoff -a
sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
sudo modprobe br_netfilter
sudo modprobe overlay
cat ＜＜EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
sudo sysctl --system

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Installation of RKE2 on Control Nodes
-------------------------------------
For Control Plane Nodes (3 nodes):

curl -sfL https://get.rke2.io | sudo sh -
sudo systemctl enable rke2-server.service

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Installation of RKE2 on Worker Nodes
------------------------------------
For Worker Node (1 node):

curl -sfL https://get.rke2.io | sudo sh -
sudo systemctl enable rke2-agent.service

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Config File For Control Node 1 - "scooby" (192.168.50.88)
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sudo mkdir -p /etc/rancher/rke2/ && sudo sh -c 'cat ＞ /etc/rancher/rke2/config.yaml' ＜＜'EOF'
tls-san:
CTRL_NODE1_IP
CTRL_NODE2_IP
CTRL_NODE3_IP
node-ip: CTRL_NODE1_IP
cluster-cidr: 10.42.0.0/16
service-cidr: 10.43.0.0/16
EOF
sudo systemctl start rke2-server.service
sudo cat /var/lib/rancher/rke2/server/node-token

Config File For Control Node 2 - "scrapy" (192.168.50.64)
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sudo mkdir -p /etc/rancher/rke2/ && sudo sh -c 'cat ＞ /etc/rancher/rke2/config.yaml' ＜＜'EOF'
server: https://192.168.50.88:9345
token: ####YOURTOKEN####
tls-san:
CTRL_NODE1_IP
CTRL_NODE2_IP
CTRL_NODE3_IP
node-ip: CTRL_NODE2_IP
cluster-cidr: 10.42.0.0/16
service-cidr: 10.43.0.0/16
EOF
sudo systemctl start rke2-server.service

Config File For Control Node 3 - "shaggy" (192.168.50.90)
-------------------------------------------------------
sudo mkdir -p /etc/rancher/rke2/ && sudo sh -c 'cat ＞ /etc/rancher/rke2/config.yaml' ＜＜'EOF'
server: https://192.168.50.88:9345
token: ####YOURTOKEN####
tls-san:
CTRL_NODE1_IP
CTRL_NODE2_IP
CTRL_NODE3_IP
node-ip: CTRL_NODE3_IP
cluster-cidr: 10.42.0.0/16
service-cidr: 10.43.0.0/16
EOF
sudo systemctl start rke2-server.service


Config File For Worker Node - "velma" (192.168.50.86)
-----------------------------------------------------
sudo mkdir -p /etc/rancher/rke2/ && sudo sh -c 'cat ＞ /etc/rancher/rke2/config.yaml' ＜＜'EOF'
server: https://192.168.50.88:9345
token: ####YOURTOKEN####
node-ip: 192.168.50.86
EOF
sudo systemctl start rke2-agent.service
sudo systemctl status rke2-agent.service

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Verification
--------
After all nodes are joined, you can verify with:

sudo ln -s /var/lib/rancher/rke2/bin/kubectl /usr/local/bin/kubectl
export KUBECONFIG=/etc/rancher/rke2/rke2.yaml
kubectl get nodes
kubectl get pods -A

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Installing Rancher Management UI Into Your RKE2 Cluster
-------------------------------------------------------
Install Rancher via Helm (run these commands on only ONE control plane node!)

curl https://raw.githubusercontent.com/hel... | bash

helm repo add rancher-latest https://releases.rancher.com/server-c...
helm repo add jetstack https://charts.jetstack.io
helm repo update

kubectl apply -f https://github.com/cert-manager/cert-...
helm install cert-manager jetstack/cert-manager \
--namespace cert-manager \
--create-namespace \
--version v1.14.5

kubectl -n cert-manager wait --for=condition=Ready pods --all --timeout=300s

helm install rancher rancher-latest/rancher \
--namespace cattle-system \
--create-namespace \
--set hostname=rancher.########YOURDOMAIN########.com\
--set replicas=3 \
--set bootstrapPassword=rabi123

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Verification (Run on the same node):
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kubectl -n cattle-system get pods
kubectl -n cattle-system get svc

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Testing On Web Browser
----------------------
Edit Windows Host file
192.168.50.88 rancher.########YOURDOMAIN########.com

Open Web Browser and enter
https://rancher.########YOURDOMAIN########.com

Rancher setup
Enter the "bootstrapPassword".
After that, click on "Log in with local User" button.

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#kubernetes #fypシ #github #rke2