kubernetes安装

young 523 2022-04-22

官方安装方案

阿里云镜像安装方案

  1. 安装docker

  2. 关闭防火墙

    systemctl stop firewalld
systemctl disable firewalld

  3. 关闭selinux

    # 永久关闭
sed -i 's/enforcing/disabled' /etc/selinux/config
# 临时关闭
setenforce 0

  4. 关闭swap

    # 临时关闭
swapoff -a
# 永久关闭
vim /etc/fstab
注释掉/dev/mapper/centos-swap swap swap defaults 0 0

    然后重启生效

    systemctl reboot
# 查看swap交换器是否都为0
free -m

  5. 设置hosts

    cat >> /etc/hosts << EOF
192.168.0.104 k8s-master
192.168.0.105 k8s-node1
192.168.0.106 k8s-node2
EOF

  6. 将桥接的IPV4流量传递到iptables

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

    # 让上述配置生效
sysctl --system

  7. 设置时间

    yum install -y ntpdate -y
ntpdate -u npt.api.bz
# 设置时区为中国时区
timedatectl set-timezone Asia/Shanghai

  8. yum源切换与yum k8s

    如果是x86_64的cpu

    cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

    如果是mac m1的cpu

    cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-aarch64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

  9. 安装kubeadm，kubelet，kubectl

    在阿里云的安装步骤中写到

    由于官网未开放同步方式, 可能会有索引gpg检查失败的情况, 这时请用 yum install -y --nogpgcheck kubelet kubeadm kubectl 安装

    setenforce 0
yum install -y --nogpgcheck kubelet kubeadm kubectl

  10. 配置docker

    在/etc/docker/daemon.json中增加配置

    "exec-opts": ["native.cgroupdriver=systemd"]

    重载配置，重启docker和kubelet

    systemctl daemon-reload
# docker需开机启动，否则初始化会失败
systemctl enable docker
systemctl restart docker
systemctl enable kubelet
systemctl restart kubelet

    后续步骤，无特殊说明的情况下，仅在master节点上执行

  11. 初始化

    ip为master的ip地址，其次注意版本，剩下的无需改动

    kubeadm init --apiserver-advertise-address=192.168.0.104 --image-repository registry.cn-hangzhou.aliyuncs.com/google_containers --kubernetes-version v1.26.0 --service-cidr=10.96.0.0/12 --pod-network-cidr=10.244.0.0/16

    如果出现异常，需要用 kubeadm reset命令重置之后，再重新init

  12. 配置kubectl命令工具

    mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

    验证kubectl命令

    kubectl get nodes

  13. 安装calico

    kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
docker kubernetes