Bootstrap

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

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