Centos8 Kubernetes Install

root 로 진행

master 1대

work 2대

# hostnamectl set-hostname master
# master / work 모두 작성
cat <<EOF>> /etc/hosts
172.16.135.211 master
172.16.135.212 work01
172.16.135.213 work02
EOF

 

#docker install

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

sudo dnf repolist -v

dnf list docker-ce --showduplicates | sort -r

sudo dnf install docker-ce-3:18.09.1-3.el7

sudo systemctl stop firewalld

sudo systemctl disable firewalld

sudo systemctl enable --now docker

systemctl is-active docker

systemctl is-enabled docker

curl -L "https://github.com/docker/compose/releases/download/1.23.2/docker-compose-$(uname -s)-$(uname -m)" -o docker-compose

sudo mv docker-compose /usr/local/bin && sudo chmod +x /usr/local/bin/docker-compose

curl -L https://github.com/docker/machine/releases/download/v0.16.2/docker-machine-`uname -s`-`uname -m` >/tmp/docker-machine && chmod +x /tmp/docker-machine && sudo cp /tmp/docker-machine /usr/local/bin/docker-machine
    

#iptable setting

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

sysctl --system

* Applying /etc/sysctl.d/99-sysctl.conf ...
* Applying /etc/sysctl.d/k8s.conf ...
확인

#disable seliunx

setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

#disable swap

swapoff -a
vi /etc/fstab
swap 부분주석 처리

reboot

#kubernetes install

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
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
EOF


yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
systemctl enable kubelet && systemctl start kubelet


kubeadm init --pod-network-cidr=192.168.0.0/16 --apiserver-advertise-address={ip address}

#복사해둔다.
kubeadm join {ip address}:6443 --token 2w88zz.akk7unefal9ewvj4 \
    --discovery-token-ca-cert-hash sha256:5b0584f26ae68f1bbe83e10a151ef6c9457d8be00a1615c9bc340528a76f8dd9


export KUBECONFIG=/etc/kubernetes/admin.conf

kubectl apply -f https://docs.projectcalico.org/v3.8/manifests/calico.yaml

kubectl get pods --all-namespaces

#work01, work02에서 
#복사한 값을 입력한다. 
kubeadm join {ip address}:6443 --token 2w88zz.akk7unefal9ewvj4 \
    --discovery-token-ca-cert-hash sha256:5b0584f26ae68f1bbe83e10a151ef6c9457d8be00a1615c9bc340528a76f8dd9

#master 에서
kubectl get nodes