[K8s-1pro] install

쿠버네티스 어나더 클래스 강의 기반

 

rokcy -> ubuntu 

echo '======== [4-1] 패키지 업데이트 ========'
# 강의와 동일한 실습 환경을 유지하기 위해 Linux Update는 하지 마세요!
# sudo apt update -y # (x)

echo '======== [4-2] 타임존 설정 ========'
timedatectl set-timezone Asia/Seoul
timedatectl set-ntp true

echo '======== [4-3] [WARNING FileExisting-tc]: tc not found in system path 로그 관련 업데이트 ========'
sudo apt install -y iproute2 iputils-ping net-tools
echo '======== [4-3] [WARNING OpenSSL version mismatch 로그 관련 업데이트 ========'
sudo apt install openssl openssh-server -y

echo '======= [4-4] hosts 설정 =========='
cat << EOF >> /etc/hosts
192.168.56.30 k8s-master
EOF

echo '======== [5] kubeadm 설치 전 사전작업 ========'
echo '======== [5] 방화벽 해제 ========'
sudo ufw disable

echo '======== [5] Swap 비활성화 ========'
sudo swapoff -a && sed -i '/ swap / s/^/#/' /etc/fstab

echo '======== [6] 컨테이너 런타임 설치 ========'
echo '======== [6-1] 컨테이너 런타임 설치 전 사전작업 ========'
echo '======== [6-1] iptable 세팅 ========'
cat <<EOF |tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF

modprobe overlay
modprobe br_netfilter

cat <<EOF |tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF

sudo sysctl --system

echo '======== [6-2] 컨테이너 런타임 (containerd 설치) ========'
sudo apt install -y containerd

mkdir -p /etc/containerd
sudo containerd config default > /etc/containerd/config.toml

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

sudo systemctl restart containerd
sudo systemctl enable containerd


echo '======== [7] kubeadm 설치 ========'
echo '======== [7] repo 설정 ========'
sudo apt-get update -y
sudo apt-get install -y apt-transport-https ca-certificates curl gpg
sudo mkdir -p -m 755 /etc/apt/keyrings
sudo rm -f /etc/apt/keyrings/kubernetes-apt-keyring.gpg
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.32/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.32/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list


echo '======== [7] kubelet, kubeadm, kubectl 패키지 설치 ========'
sudo apt update -y
sudo apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl
sudo systemctl enable --now kubelet

echo '======== [8] kubeadm으로 클러스터 생성  ========'
echo '======== [8-1] 클러스터 초기화 (Pod Network 세팅) ========'
sudo kubeadm init --pod-network-cidr=20.96.0.0/16 --apiserver-advertise-address 192.168.56.30

echo '======== [8-2] kubectl 사용 설정 ========'
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config

echo '======== [8-3] Pod Network 설치 (calico) ========'
kubectl create -f https://raw.githubusercontent.com/k8s-1pro/install/main/ground/k8s-1.27/calico-3.26.4/calico.yaml
kubectl create -f https://raw.githubusercontent.com/k8s-1pro/install/main/ground/k8s-1.27/calico-3.26.4/calico-custom.yaml

echo '======== [8-4] Master에 Pod를 생성 할수 있도록 설정 ========'
kubectl taint nodes k8s-master node-role.kubernetes.io/control-plane-

echo '======== [9] 쿠버네티스 편의기능 설치 ========'
echo '======== [9-1] kubectl 자동완성 기능 ========'
sudo apt install -y bash-completion
echo "source <(kubectl completion bash)" >> ~/.bashrc
echo 'alias k=kubectl' >>~/.bashrc
echo 'complete -o default -F __start_kubectl k' >>~/.bashrc
source ~/.bashrc

echo '======== [9-2] Dashboard 설치 ========'
kubectl create -f https://raw.githubusercontent.com/k8s-1pro/install/main/ground/k8s-1.27/dashboard-2.7.0/dashboard.yaml

echo '======== [9-3] Metrics Server 설치 ========'
kubectl create -f https://raw.githubusercontent.com/k8s-1pro/install/main/ground/k8s-1.27/metrics-server-0.6.3/metrics-server.yaml