笔记记录 k8s-install

master节点安装:

yum upgrade -y    更新系统
yum update -y     升级内核
ifconfig ens33  

关闭swap
swapoff  -a    （临时）

vim /etc/fstab  （永久）
#/dev/mapper/cl-swap     swap                    swap    defaults        0 0

vim /etc/sysctl.conf
vm.swappiness = 0
net.bridge.bridge-nf-call-arptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1

lsmod |grep br_netfilter
modprobe br_netfilter
lsmod |grep br_netfilter
sysctl -p

systemctl disable firewalld.service  && systemctl stop firewalld.service
 
安装docker   最新的docker兼容k8s，会报警   选择docker-ce-19.03.15
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
sudo yum makecache fast
sudo yum list docker-ce --showduplicates | sort -r
sudo yum install docker-ce-19.03.15 -y
sudo systemctl enable docker
sudo systemctl start docker

安装kubernetes
（1）配置kuberbetes源
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

（2）关闭 selinux
setenforce 0
# cat /etc/selinux/config
#     disabled - No SELinux policy is loaded.
SELINUX=disabled

（3）安装
yum install kubeadm kubelet kubectl -y

systemctl enable kubelet.service

（4）导入镜像并初始化
kubeadm init --kubernetes-version=v1.21.1 --apiserver-advertise-address 192.168.0.10  --pod-network-cidr 10.244.0.0/16

（5）下载配置文件
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
docker pull quay.io/coreos/flannel:v0.14.0

（6）根据初始化成功的提示创建目录
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config