[Kubernetes] 설치 명령어 모음

Docker 설치

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

sudo yum-config-manager --add-repo \
  https://download.docker.com/linux/centos/docker-ce.repo

sudo yum update -y && sudo yum install -y \
  containerd.io-1.2.13 \
  docker-ce-19.03.11 \
  docker-ce-cli-19.03.11

sudo mkdir /etc/docker

cat <<EOF | sudo tee /etc/docker/daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2",
  "storage-opts": [
    "overlay2.override_kernel_check=true"
  ]
}
EOF

sudo mkdir -p /etc/systemd/system/docker.service.d​

sudo systemctl daemon-reload
sudo systemctl restart docker

sudo systemctl enable docker

---

쿠버네티스 클러스터 설치

sudo modprobe br_netfilter

echo "br_netfilter" > /etc/modules-load.d/br_netfilter.conf

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

sudo sysctl --system

sudo systemctl stop firewalld
sudo systemctl disable firewalld​

cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl
EOF

# Set SELinux in permissive mode (effectively disabling it)
sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

sudo yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes

sudo systemctl enable --now kubelet

---

쿠버네티스 Master Node일 경우

kubeadm init --pod-network-cidr 172.16.0.0/16

cidr network대역은 선택

echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> /etc/profile

source /etc/profile

curl https://docs.projectcalico.org/manifests/calico.yaml -O

vi calico.yaml
/CALICO_IPV4POOL_CIDR
# pod-network-cidr 부분과 일치시켜주도록 변경

kubectl apply -f calico.yaml

---

쿠버네티스 Slave Node일 경우

# Master Node에서 kubeadm init를 통해 생성된 kubeadm join ... 명령문 넣으면 끝
kubeadm join ...