部署k8s时候一些设置

参数

cat <<EOF | tee /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl -p /etc/sysctl.d/k8s.conf

如果报错/proc/sys/net/bridge/bridge-nf-call-iptables not found,那么

modprobe br_netfilter

docker cgroupdriver

cat <<EOF | sudo tee /etc/docker/daemon.json
{
"exec-opts": ["native.cgroupdriver=systemd"]
}
EOF

k8s源

cat <<EOF | tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0

EOF   

yum install -y kubelet-1.19.2 kubeadm-1.19.2 kubectl-1.19.2

一些命令行工具依赖

yum -y install socat conntrack-tools

永久关闭swap

swapoff -a 是临时关闭

对/etc/fstab中,类似如下,添加注释

/swapfile none swap defaults 0 0

对应如下

#/swapfile none swap defaults 0 0

添加docker 源

sudo yum install -y yum-utils

sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo
安装最新版本
sudo yum install docker-ce
sudo yum list docker-ce --showduplicates 
安装指定版本
sudo yum install docker-ce-xxx