|NO.Z.00003|——————————|^^ 部署 ^^|——|Kubernetes&kubeadm部署.V02|——|系统初始化|

一、部署规划

### --- 部署规划

~~~     centos7.x.server1:  k8s-master         IP：10.10.10.11
~~~     centos7.x.server2:  k8s-node1          IP：10.10.10.12
~~~     centos7.x.server3:  k8s-node2          IP：10.10.10.13

二、系统初始化

### --- 关闭防火墙

[root@server11 ~]# systemctl stop firewalld.service
[root@server11 ~]# systemctl disable firewalld.service

### --- 关闭selinux

[root@server11 ~]# sed -i 's/enforcing/disabled/' /etc/selinux/config                   #永久
[root@server11 ~]# setenforce 0                                                         #临时

### --- 关闭swap

[root@server11 ~]# swapoff -a                                                           #临时
[root@server11 ~]# sed -ri 's/.*swap.*/#&/' /etc/fstab                                  #永久

### --- 主机名

[root@server11 ~]# hostnamectl set-hostname k8s-master
[root@server12 ~]# hostnamectl set-hostname k8s-node1 
[root@server13 ~]# hostnamectl set-hostname k8s-node2

### --- 在master添加hosts：

[root@k8s-master ~]# cat >> /etc/hosts << EFO 
> 10.10.10.11 k8s-master
> 10.10.10.12 k8s-node1
> 10.10.10.13 k8s-node2
> EFO

### --- 将桥接的IPV4流量传递到iptables的链：

[root@k8s-master ~]# cat > /etc/sysctl.d/k8s.conf << EOF
> net.bridge.bridge-nf-call-ip6tables = 1
> net.bridge.bridge-nf-call-iptables = 1
> EOF
[root@k8s-node1 ~]# cat > /etc/sysctl.d/k8s.conf << EOF
> net.bridge.bridge-nf-call-ip6tables = 1
> net.bridge.bridge-nf-call-iptables = 1
> EOF
[root@k8s-node2 ~]# cat > /etc/sysctl.d/k8s.conf << EOF
> net.bridge.bridge-nf-call-ip6tables = 1
> net.bridge.bridge-nf-call-iptables = 1
> EOF

~~~     生效

[root@k8s-master ~]# sysctl  --system
[root@k8s-node1 ~]# sysctl  --system
[root@k8s-node2 ~]# sysctl  --system

### --- 时间同步

[root@k8s-master ~]# yum install -y ntpdate
[root@k8s-node1 ~]# yum install -y ntpdate
[root@k8s-node2 ~]# yum install -y ntpdate

[root@k8s-master ~]# ntpdate time.windows.com                                           #设置当前时间和windows主机的时间一致
19 Feb 15:18:49 ntpdate[11137]: adjust time server 20.189.79.72 offset 0.069848 sec
[root@k8s-node1 ~]# ntpdate time.windows.com
19 Feb 15:18:53 ntpdate[10229]: adjust time server 20.189.79.72 offset 0.064745 sec
[root@k8s-node2 ~]# ntpdate time.windows.com
19 Feb 15:18:56 ntpdate[10286]: adjust time server 20.189.79.72 offset 0.070064 sec

三、所有节点安装Docker/kubeadm/kubelet：

### --- 所有节点安装Docker/kubeadm/kubelet：

~~~     Kubernetes默认CRI(容器运行时)为Docker，因此先安装Docker。

### --- 安装Docker（三个节点均部署）
~~~     k8s-master部署

[root@k8s-master ~]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
[root@k8s-master ~]# yum install -y docker-ce-18.06.1.ce-3.el7
[root@k8s-master ~]# systemctl enable docker && systemctl start docker
[root@k8s-master ~]# docker --version
Docker version 18.06.1-ce, build e68fc7a

~~~     k8s-node1部署

[root@k8s-node1 ~]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
[root@k8s-node1 ~]# yum install -y docker-ce-18.06.1.ce-3.el7
[root@k8s-node1 ~]# systemctl enable docker && systemctl start docker
[root@k8s-node1 ~]# docker --version
Docker version 18.06.1-ce, build e68fc7a

~~~     k8s-node2部署

[root@k8s-node2 ~]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
[root@k8s-node2 ~]# yum install -y docker-ce-18.06.1.ce-3.el7
[root@k8s-node2 ~]# systemctl enable docker && systemctl start docker
[root@k8s-node2 ~]# docker --version
Docker version 18.06.1-ce, build e68fc7a

### --- 添加阿里云YUM软件源:设置仓库地址

[root@k8s-master ~]# cat > /etc/docker/daemon.json << EOF
> {
>     "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
> }
> EOF
[root@k8s-master ~]# systemctl restart docker

[root@k8s-master ~]# docker info 
Registry Mirrors:
 https://b9pmyelo.mirror.aliyuncs.com/
[root@k8s-node1 ~]# cat > /etc/docker/daemon.json << EOF
> {
>     "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
> }
> EOF
[root@k8s-node1 ~]# systemctl restart docker
[root@k8s-node1 ~]# docker info
Registry Mirrors:
 https://b9pmyelo.mirror.aliyuncs.com/
[root@k8s-node2 ~]# cat > /etc/docker/daemon.json << EOF
> {
>     "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
> }
> EOF

[root@k8s-node2 ~]# systemctl restart docker
[root@k8s-node2 ~]# docker info
Registry Mirrors:
 https://b9pmyelo.mirror.aliyuncs.com/

### --- 添加阿里云YUM软件源:k8s软件源地址

[root@k8s-master ~]# cat > /etc/yum.repos.d/kubernetes.repo << EOF
> [kubernetes]
> make=Kubernetes
> baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
> enabled=1
> gpgcheck=0
> repo_gpgcheck=0
> gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
> EOF
[root@k8s-node1 ~]# cat > /etc/yum.repos.d/kubernetes.repo << EOF
> [kubernetes]
> make=Kubernetes
> baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
> enabled=1
> gpgcheck=0
> repo_gpgcheck=0
> gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
> EOF

### --- 安装kubeadm，kubelet和kubectl

[root@k8s-master ~]# yum install -y kubelet-1.18.0 kubeadm-1.18.0 kubectl-1.18.0
Installed:
  kubeadm.x86_64 0:1.18.0-0                                  kubectl.x86_64 0:1.18.0-0                                  kubelet.x86_64 0:1.18.0-0
[root@k8s-master ~]# systemctl enable kubelet 
[root@k8s-node1 ~]# yum install -y kubelet-1.18.0 kubeadm-1.18.0 kubectl-1.18.0 
Installed:
  kubeadm.x86_64 0:1.18.0-0                                  kubectl.x86_64 0:1.18.0-0                                  kubelet.x86_64 0:1.18.0-0
[root@k8s-node1 ~]# systemctl enable kubelet
[root@k8s-node2 ~]# yum install -y kubelet-1.18.0 kubeadm-1.18.0 kubectl-1.18.0 
Installed:
  kubeadm.x86_64 0:1.18.0-0                                  kubectl.x86_64 0:1.18.0-0                                  kubelet.x86_64 0:1.18.0-0
[root@k8s-node2 ~]# systemctl enable kubelet

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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