手把手教你搭建k8s测试环境

192.168.56.210  k8s-master
192.168.56.220  k8s-node01
192.168.56.230  k8s-node02
hostnamectl  set-hostname k8s-master  # 依次设置好主机名

[root@k8s-master yum.repos.d]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo　　#配置dokcer源
[root@k8s-master ~]# cat <<EOF > /etc/yum.repos.d/kubernetes.repo　　#配置kubernetes源
> [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

setenforce 0
# sed -i  's@^\(SELINUX=\).*@\1disabled@' /etc/selinux/config

systemctl  stop firewalld.service
systemctl  disable firewalld.service

[root@k8s-master yum.repos.d]# yum repolist #查看可用源
[root@k8s-master yum.repos.d]# yum install -y docker-ce kubelet kubeadm kubectl

[root@k8s-master ~]# mkdir /etc/docker
[root@k8s-master ~]# vim /etc/docker/daemon.json
{
  "registry-mirrors": ["https://registry.docker-cn.com"]
}

[root@k8s-master ~]# cat /usr/lib/systemd/system/docker.service
[Service]

Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
ExexStartPost=/usr/sbin/iptables -P FORWARD ACCEPT  # 这里加一行

[root@k8s-master ~]# systemctl  daemon-reload 
[root@k8s-master ~]# systemctl start docker
[root@k8s-master ~]# systemctl enable docker

[root@k8s-master ~]# vim /etc/sysconfig/kubelet 　　#修改kubelet禁止提示swap警告，最好关闭swap
KUBELET_EXTRA_ARGS="--fail-swap-on=false" #如果配置了swap不然提示出错信息
更改kubelet配置，不提示swap警告信息，最好关闭swap
[root@k8s-master ~]# swapoff -a　　#关闭swap
# 修改系统文件是的机器bridge模式开启
[root@k8s-master ~]#echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables

[root@k8s-master ~]#systemctl  enable  kubelet.service 

[root@k8s-master ~]#kubeadm init  --kubernetes-version=v1.15.0  --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/12 --ignore-preflight-errors=Swap --apiserver-advertise-address=0.0.0.0 --image-repository registry.aliyuncs.com/google_containers
[root@k8s-master ~]#mkdir -p $HOME/.kube
[root@k8s-master ~]#sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@k8s-master ~]#sudo chown $(id -u):$(id -g) $HOME/.kube/config

[root@k8s-node~]#kubeadm join 192.168.56.210:6443  --ignore-preflight-errors=Swap  --token 1n1j1d.21fchn5z1nwh2j16 \
    --discovery-token-ca-cert-hash sha256:ce6a7755de5fcb23d1c54b07b82c392a64cbf9438efe6b994813e10a788ea247

[root@k8s-master ~]# kubeadm  token create  --print-join-command
kubeadm join 192.168.56.210:6443 --token jjquvs.9hd22iqm33eqb77g     --discovery-token-ca-cert-hash sha256:ce6a7755de5fcb23d1c54b07b82c392a64cbf9438efe6b994813e10a788ea247

[root@k8s-master ~]#kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml