k8s使用kubeadm 添加新的node节点

1.关闭防火墙 $ systemctl stop firewalld

备注：必须关闭

2.关闭selinux $ setenforce 0

3.关闭swap $ swapoff -a 临时关闭

$ free 可以通过这个命令查看swap是否关闭了

$ vim /etc/fstab 永久关闭

#/dev/mapper/centos_k8s--master-swap swap swap defaults 0 0

备注：必须关闭

4.添加主机名与IP对应的关系 $ vim /etc/hosts

添加如下内容：

192.168.122.* k8s-master

192.168.122.* test3

5.将桥接的IPV4流量传递到iptables 的链 $ cat > /etc/sysctl.d/k8s.conf << EOF

net.bridge.bridge-nf-call-ip6tables = 1 net.ipv4.ip_forward = 1 net.bridge.bridge-nf-call-iptables = 1

EOF

1、安装docker、kubelet、kubectl、kubeadm、socat

cat kubernets.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

安装相应版本的kubernets 安装docker 源

scp /etc/yum.repos.d/docker-ce.repo

2、将需要的镜像都加载到服务器上面：

yum install docker、kubelet、kubectl、kubeadm、socat -y

3、在master上面copy cni文件到node节点上面：

#mkdir -p /etc/cni/net.d

在master上面copy：

#scp /etc/cni/net.d/10-flannel.conf ip:/etc/cni/net.d

4、加入cluster

首先k8s默认的cgroup-driver为cgroupfs，但是yum安装kubelet的时候自动修改为systemd，而docker通过docker info命令查看是cgroupfs，所以需要将k8s的修改为cgroupfs：

#vim /etc/systemd/system/kubelet.service.d/10-kubeadm.conf

Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=cgroupfs"

#systemctl enable docker

#systemctl enable kubelet

kubeadm token create kubeadm token list openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //'

#kubeadm join --token c04f89.b781cdb55d83c1ef 10.10.3.4:63 --discovery-token-ca-cert-hash sha256:986e83a9cb948368ad0552b95232e31d3b76e2476b595bd1d905d5242ace29af --ignore-preflight-errors=Swap

#kubectl label node km1 node-role.kubernetes.io/node=

[root@k8s-node02 ~]# kubeadm join 192.168.*.*:6443 --token q1yxmd.zyydq6ll75twmn6p --discovery-token-ca-cert-hash sha256:758341b77ec419f488a697a97cbe9c082aef934b5c0b3b62d9d4ea9414ae897d

yum list docker-ce --showduplicates|sort -r yum install -y docker-ce-19.03.13

添加标签 kubectl label node k-node-test2 nodetype=file

kubeadm join 192.168.*.*:6443 --token 73v71h.ehgzsrxub4n5zqfs --discovery-token-ca-cert-hash sha256:5e46356ced09d140cee70811da0df82d8b8b2d990122ac75577ad08ec48b4485

mke2fs -t ext4 /dev/vdb1 cat >> /etc/fstab << EOF /dev/vdb1 /data ext4 defaults 1 1 EOF