ALBERT SITE

- Start : Virtualize
- Operating System : Linux
- Linux : Boot ISO Image [Browse..] -> Rocky ISO 파일 선택
- Hardware : Memory : 4096 MB, CPU Cores : 4
        - Size : 32 GB
- Shared Directory : 설정 안함
- Summary : Name : k8s-master

echo '======== [4] Rocky Linux 기본 설정 ========'
echo '======== [4-1] 패키지 업데이트 ========'
        ' 강의와 동일한 실습 환경을 유지하기 위해 Linux Update 주석 처리
' yum -y update

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

echo '======== [4-3] [WARNING FileExisting-tc]: tc not found in system path 로그 관련 업데이트 ========'
yum install -y yum-utils iproute-tc

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 ========'
systemctl stop firewalld && systemctl disable firewalld

echo '======== [5] Swap 비활성화 ========'
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

sysctl --system

echo '======== [6-2] 컨테이너 런타임 (containerd 설치) ========'
echo '======== [6-2-1] containerd 패키지 설치 (option2) ========'
echo '======== [6-2-1-1] docker engine 설치 ========'
echo '======== [6-2-1-1] repo 설정 ========'
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

echo '======== [6-2-1-1] containerd 설치 ========'
yum install -y containerd.io-1.6.21-3.1.el9.aarch64
systemctl daemon-reload
systemctl enable --now containerd

echo '======== [6-3] 컨테이너 런타임 : cri 활성화 ========'
containerd config default > /etc/containerd/config.toml
sed -i 's/ SystemdCgroup = false/ SystemdCgroup = true/' /etc/containerd/config.toml
systemctl restart containerd

echo '======== [7] kubeadm 설치 ========'
echo '======== [7] repo 설정 ========'
cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://pkgs.k8s.io/core:/stable:/v1.27/rpm/
enabled=1
gpgcheck=1
gpgkey=https://pkgs.k8s.io/core:/stable:/v1.27/rpm/repodata/repomd.xml.key
exclude=kubelet kubeadm kubectl cri-tools kubernetes-cni
EOF

echo '======== [7] SELinux 설정 ========'
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

echo '======== [7] kubelet, kubeadm, kubectl 패키지 설치 ========'
yum install -y kubelet-1.27.2-150500.1.1.aarch64 kubeadm-1.27.2-150500.1.1.aarch64 kubectl-1.27.2-150500.1.1.aarch64 --disableexcludes=kubernetes
systemctl enable --now kubelet

echo '======== [8] kubeadm으로 클러스터 생성  ========'
echo '======== [8-1] 클러스터 초기화 (Pod Network 세팅) ========'
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 ========'
yum -y install 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

k get pods -A

https://192.168.56.30:30000/'/login