目录

1 基础概念

2 集群安装

2.1 安装前置环境

2.2 安装三大件

2.3 kubeadm创建集群

 2.4 安装收尾

3 Kubekey一键安装

---

1 基础概念

部署方式：传统部署，虚拟机部署，容器化部署​

大量容器的编排系统：

Kubernetes Cluster = N Master Node + N Worker Node：N主节点+N工作节点； N>=1

​

​

 组件信息：Kubernetes 组件 | Kubernetes

API server ：负责集群组件间的交互

kube proxy ：负责网络访问的

kubelet ：监控应用

2 集群安装

2.1 安装前置环境

4核8G（master 10.198.198.28）、8核16G（node1 10.198.198.27）、docker已安装

1）更改主机名

hostnamectl set-hostname hostname

cat >>/etc/hosts<<EOF
10.198.198.28 master
10.198.198.27 node-CICD
EOF

2）关闭SELinux和防火墙

systemctl stop firewalld

systemctl disable firewalld

sudo setenforce 0

sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

3）关闭交换分区

swapoff -a

sed -ri 's/.*swap.*/#&/' /etc/fstab

4）配置流量桥接

cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
vm.swappiness = 0
EOF

sudo sysctl --system

2.2 安装三大件

cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
   http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl
EOF

yum install -y kubelet-1.20.9 kubeadm-1.20.9 kubectl-1.20.9 --disableexcludes=kubernetes

systemctl enable --now kubelet

2.3 kubeadm创建集群

主节点下载所有的镜像

sudo tee ./images.sh <<-'EOF'
#!/bin/bash
images=(
kube-apiserver:v1.20.9
kube-proxy:v1.20.9
kube-controller-manager:v1.20.9
kube-scheduler:v1.20.9
coredns:1.7.0
etcd:3.4.13-0
pause:3.2
)
for imageName in ${images[@]} ; do
docker pull registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/$imageName
done
EOF

chmod +x ./images.sh && ./images.sh

其他节点就下载kube-proxy就行

sudo tee ./images.sh <<-'EOF'
#!/bin/bash
images=(

kube-proxy:v1.20.9

)
for imageName in ${images[@]} ; do
docker pull registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/$imageName
done
EOF

chmod +x ./images.sh && ./images.sh

所有Node节点都要配置master IP，命令如下

echo "10.198.198.28 cluster-endpoint" >> /etc/hosts

 master主节点初始化

kubeadm init \
--apiserver-advertise-address=10.198.198.28 \
--control-plane-endpoint=cluster-endpoint \
--image-repository registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images \
--kubernetes-version v1.20.9 \
--service-cidr=10.96.0.0/16 \
--pod-network-cidr=192.168.0.0/16

安装成功会出现下面这段话：

Your Kubernetes control-plane has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

Alternatively, if you are the root user, you can run:

  export KUBECONFIG=/etc/kubernetes/admin.conf

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

You can now join any number of control-plane nodes by copying certificate authorities
and service account keys on each node and then running the following as root:

  kubeadm join cluster-endpoint:6443 --token s9kvwn.feuihd3ezux4hy7u \
    --discovery-token-ca-cert-hash sha256:dbc89d4391253fd7c2cf1ac80fd7b12e1da773647725b2bcba7362c80771b08a \
    --control-plane 

Then you can join any number of worker nodes by running the following on each as root:

kubeadm join cluster-endpoint:6443 --token s9kvwn.feuihd3ezux4hy7u \
    --discovery-token-ca-cert-hash sha256:dbc89d4391253fd7c2cf1ac80fd7b12e1da773647725b2bcba7362c80771b08a 

 2.4 安装收尾

1）主节点按照要求执行如下三条命令：

 2）网络组件选一个安装：

 curl https://docs.projectcalico.org/manifests/calico.yaml -O

kubectl apply -f calico.yaml

3）其他节点加入集群

根据安装结束的提示命令，将Node节点加入集群

 4）令牌过期处理

kubeadm token create --print-join-command

3 Kubekey一键安装

1）设置域名

#各个机器设置自己的域名

hostnamectl set-hostname xxxx

2）master节点配置

export KKZONE=cn

curl -sfL https://get-kk.kubesphere.io | VERSION=v1.1.1 sh -

chmod +x kk

3）创建集群配置文件

./kk create config --with-kubernetes v1.20.4 --with-kubesphere v3.1.1

 修改config-sample.yaml

再就根据需要把需要的组件false改为true

4）创建集群

./kk create cluster -f config-sample.yaml

 首先检查发现conntrack没有安装，使用yum安装一下，然后再执行上面的命令

5） http://10.198.198.28:30880