使用 k3sup 一分钟快速搭建 K3s 集群

export MASTER_IP=${MASTER_IP:-$(ip addr show eth0 | grep 'inet ' | awk '{print $2}' | cut -d/ -f1)}
export INSTALL_K3S_VERSION=v1.23.8+k3s1
curl -sfL https://get.k3s.io | sh -s - --disable traefik --disable local-storage --disable metrics-server --advertise-address=$MASTER_IP --disable servicelb --write-kubeconfig-mode 644 --write-kubeconfig ~/.kube/config
1.
2.
3.

curl -sLS https://get.k3sup.dev | sh
sudo install k3sup /usr/local/bin/
1.
2.

brew install k3sup
1.

export MASTER_IP=192.168.1.11
k3sup install --ip $MASTER_IP \
 --user addo \
 --k3s-channel v1.24  \
 --local-path /tmp/config
1.
2.
3.
4.
5.

Running: k3sup install
2023/10/26 09:04:35 192.168.1.11
Public IP: 192.168.1.11
[INFO]  Finding release for channel v1.24
[INFO]  Using v1.24.17+k3s1 as release
...
Saving file to: /tmp/config

# Test your cluster with:
export KUBECONFIG=/tmp/config
kubectl config use-context default
kubectl get node -o wide
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.

export KUBECONFIG=/tmp/config
kubectl get node -o wide
NAME     STATUS   ROLES                  AGE   VERSION         INTERNAL-IP   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION      CONTAINER-RUNTIME
master   Ready    control-plane,master   1m   v1.24.17+k3s1   10.0.2.4      <none>        Ubuntu 20.04.6 LTS   5.15.0-1047-azure   containerd://1.7.3-k3s1
1.
2.
3.
4.

export AGENT_IP=192.168.1.12
k3sup join --ip $AGENT_IP --user addo --server-ip $MASTER_IP --k3s-channel v1.24
1.
2.

Running: k3sup join
Agent: 192.168.1.11 Server: 192.168.1.12
Received node-token from 192.168.1.11.. ok.
[INFO]  Finding release for channel v1.24
[INFO]  Using v1.24.17+k3s1 as release
...
1.
2.
3.
4.
5.
6.

kubectl get no 
NAME     STATUS   ROLES                  AGE     VERSION
node-1   Ready    <none>                 43s   v1.24.17+k3s1
master   Ready    control-plane,master   2m58s   v1.24.17+k3s1
1.
2.
3.
4.

# Define IP addresses
export HOSTS="192.168.1.11 192.168.1.12"
1.
2.

#!/bin/bash

# Read the list of IP addresses from the environment variable
IP_ADDRESSES=($HOSTS)
# Define the k3s version
K3S_VERSION="v1.24"

# Check if there is at least one IP address
if [ ${#IP_ADDRESSES[@]} -eq 0 ]; then
    echo "No IP addresses found. Please ensure the HOSTS environment variable is correctly set."
    exit 1
fi

# Install the master node
MASTER_IP=${IP_ADDRESSES[0]}
echo "Installing master node: $MASTER_IP"
k3sup install --ip $MASTER_IP --user addo --k3s-channel $K3S_VERSION \
    --k3s-extra-args '--write-kubeconfig-mode 644 --write-kubeconfig ~/.kube/config --disable traefik --disable metrics-server --disable local-storage --disable servicelb' \
    --local-path /tmp/config

# Install the other agent nodes
for i in "${!IP_ADDRESSES[@]}"; do
    if [ $i -ne 0 ]; then
        AGENT_IP=${IP_ADDRESSES[$i]}
        echo "Installing agent node: $AGENT_IP"
        k3sup join --ip $AGENT_IP --server-ip $MASTER_IP --user addo --k3s-channel $K3S_VERSION
    fi
done

echo "k3s cluster installation complete."
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.

#!/bin/bash

# Read the list of IP addresses from the environment variable
IP_ADDRESSES=($HOSTS)

# Check if there is at least one IP address
if [ ${#IP_ADDRESSES[@]} -eq 0 ]; then
    echo "No IP addresses found. Please ensure the HOSTS environment variable is correctly set."
    exit 1
fi

# Clean up the master node
MASTER_IP=${IP_ADDRESSES[0]}
echo "Cleaning up master node: $MASTER_IP"
ssh -i ~/.ssh/id_rsa $MASTER_IP k3s-uninstall.sh

# Clean up the other agent nodes
for i in "${!IP_ADDRESSES[@]}"; do
    if [ $i -ne 0 ]; then
        AGENT_IP=${IP_ADDRESSES[$i]}
        echo "Cleaning up agent node: $AGENT_IP"
        ssh -i ~/.ssh/id_rsa $AGENT_IP k3s-agent-uninstall.sh
    fi
done

echo "k3s cluster cleanup complete."
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.