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|
||||
# 最值得参考的 Kubernetes 安装文档在这里
|
||||
|
||||
## 文档特点
|
||||
|
||||
**网上那么多 Kubernetes 安装文档,为什么这篇文档更有参考价值?**
|
||||
|
||||
* **众多网友验证,并在线提出修改意见**
|
||||
|
||||

|
||||
|
||||
* **持续不断地更新和完善**,[更新历史](https://github.com/eip-work/kuboard-press/commits/master/install/install-k8s.md)
|
||||
|
||||

|
||||
|
||||
* **在线答疑** QQ 群
|
||||
|
||||

|
||||
|
||||
## 配置要求
|
||||
|
||||
对于 Kubernetes 初学者,推荐在阿里云采购如下配置:
|
||||
|
||||
* 3台 2核4G 的ECS(突发性能实例 t5 ecs.t5-c1m2.large或同等配置,单台约 0.4元/小时,停机时不收费)
|
||||
* Cent OS 7.6
|
||||
|
||||
|
||||
[领取阿里云最高2000元红包](https://promotion.aliyun.com/ntms/yunparter/invite.html?userCode=obezo3pg)
|
||||
|
||||
Kuboard 的 Live Demo 环境使用的是如下拓扑结构,本文档描述了如何在完成该 demo 环境的搭建。
|
||||
|
||||
完成安装后,对应的软件版本为:
|
||||
|
||||
* Kubernetes v1.15.1
|
||||
* Docker 18.09.7
|
||||
|
||||

|
||||
|
||||
::: tip
|
||||
**关于二进制安装**
|
||||
|
||||
网上一直流传着一种 ***“二进制”*** 安装 Kubernetes 的方法,查了许久,未曾在 kubernetes.io 官方网站上看到任何关于此安装方法的介绍,也并没有看到任何关于 ***“二进制”*** 安装的优势,唯一的解释是:
|
||||
> 由于众所周知的原因,在国内无法直接访问Google的服务。二进制包由于其下载方便、灵活定制而深受广大kubernetes使用者喜爱,成为企业部署生产环境比较流行的方式之一
|
||||
|
||||
鉴于目前已经有比较方便的办法获得 kubernetes 镜像,我将回避 ***二进制*** 安装是否更好的争论。本文采用 kubernetes.io 官方推荐的 kubeadm 工具安装 kubernetes 集群。
|
||||
|
||||
:::
|
||||
|
||||
|
||||
## 制作标准机镜像
|
||||
|
||||
通过使用标准机镜像,可以
|
||||
|
||||
- **避免重复执行对测试机安装必要软件的过程**
|
||||
- **以一种相对标准化的过程管理测试机的维护**
|
||||
|
||||
标准机镜像中预装了如下内容:
|
||||
|
||||
- docker
|
||||
- nfs-utils
|
||||
- kubernetes images
|
||||
|
||||
::: tip
|
||||
* 您也可以不制作标准机镜像,而是在三台机器上都执行 ***制作标准机镜像*** 中的所有操作步骤
|
||||
:::
|
||||
|
||||
**标准机镜像的制作过程描述如下:**
|
||||
|
||||
### 安装docker
|
||||
|
||||
**卸载旧版本**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
sudo yum remove -y docker \
|
||||
docker-client \
|
||||
docker-client-latest \
|
||||
docker-common \
|
||||
docker-latest \
|
||||
docker-latest-logrotate \
|
||||
docker-logrotate \
|
||||
docker-selinux \
|
||||
docker-engine-selinux \
|
||||
docker-engine
|
||||
```
|
||||
|
||||
**设置 yum repository**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
sudo yum install -y yum-utils \
|
||||
device-mapper-persistent-data \
|
||||
lvm2
|
||||
sudo yum-config-manager \
|
||||
--add-repo \
|
||||
https://download.docker.com/linux/centos/docker-ce.repo
|
||||
```
|
||||
|
||||
**安装并启动 docker**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
sudo yum install -y docker-ce-18.09.7 docker-ce-cli-18.09.7 containerd.io
|
||||
sudo systemctl enable docker
|
||||
sudo systemctl start docker
|
||||
```
|
||||
|
||||
**检查 docker 版本**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
docker version
|
||||
```
|
||||
|
||||
|
||||
|
||||
> **参考文档**
|
||||
>
|
||||
> https://docs.docker.com/install/linux/docker-ce/centos/
|
||||
>
|
||||
> https://docs.docker.com/install/linux/linux-postinstall/
|
||||
|
||||
|
||||
|
||||
### 安装 nfs-utils
|
||||
|
||||
**执行安装命令**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
sudo yum install -y nfs-utils
|
||||
```
|
||||
|
||||
必须先安装 nfs-utils 才能挂载 nfs 网络存储
|
||||
|
||||
|
||||
|
||||
### K8S基本配置
|
||||
|
||||
**配置K8S的yum源**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
cat <<EOF > /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
|
||||
EOF
|
||||
```
|
||||
|
||||
**关闭 防火墙、SeLinux、swap**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
systemctl stop firewalld
|
||||
systemctl disable firewalld
|
||||
|
||||
setenforce 0
|
||||
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
|
||||
|
||||
swapoff -a
|
||||
yes | cp /etc/fstab /etc/fstab_bak
|
||||
cat /etc/fstab_bak |grep -v swap > /etc/fstab
|
||||
```
|
||||
|
||||
**修改 /etc/sysctl.conf**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
vim /etc/sysctl.conf
|
||||
```
|
||||
|
||||
向其中添加
|
||||
|
||||
```
|
||||
net.ipv4.ip_forward = 1
|
||||
net.bridge.bridge-nf-call-ip6tables = 1
|
||||
net.bridge.bridge-nf-call-iptables = 1
|
||||
```
|
||||
|
||||
如下图所示
|
||||
|
||||

|
||||
|
||||
执行命令以应用
|
||||
|
||||
```sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
sysctl -p
|
||||
```
|
||||
|
||||
**安装kubelet、kubeadm、kubectl**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
yum install -y kubelet-1.15.1 kubeadm-1.15.1 kubectl-1.15.1
|
||||
```
|
||||
|
||||
|
||||
|
||||
**修改docker Cgroup Driver为systemd**
|
||||
|
||||
> 如果不修改,在添加 worker 节点时可能会碰到如下错误
|
||||
> ```
|
||||
> [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd".
|
||||
> Please follow the guide at https://kubernetes.io/docs/setup/cri/
|
||||
> ```
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
vim /usr/lib/systemd/system/docker.service
|
||||
```
|
||||
|
||||
向其中添加
|
||||
|
||||
```
|
||||
--exec-opt native.cgroupdriver=systemd
|
||||
```
|
||||
|
||||
如下图所示
|
||||
|
||||

|
||||
|
||||
|
||||
**设置 docker 镜像**
|
||||
|
||||
执行以下命令使用 docker 国内镜像,提高 docker 镜像下载速度和稳定性
|
||||
|
||||
> 如果您访问 https://hub.docker.io 速度非常稳定,亦可以跳过这个步骤
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io
|
||||
```
|
||||
|
||||
**重启 docker,并启动 kubelet**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
systemctl daemon-reload
|
||||
systemctl restart docker
|
||||
systemctl enable kubelet && systemctl start kubelet
|
||||
```
|
||||
|
||||
|
||||
**制作镜像**
|
||||
|
||||
请参考阿里云基于ECS [制作虚拟机镜像](https://help.aliyun.com/document_detail/35109.html?spm=5176.2020520101.0.0.75fc4df5mtdFmV) 的文档
|
||||
|
||||
|
||||
## 初始化 master 节点
|
||||
|
||||
::: tip
|
||||
以 root 身份在 demo-master-a-1 机器上执行
|
||||
:::
|
||||
|
||||
**配置 apiserver.demo 的域名**
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
echo "x.x.x.x apiserver.demo" >> /etc/hosts
|
||||
```
|
||||
|
||||
::: warning
|
||||
请替换其中的 x.x.x.x 为您的 demo-master-a-1 的实际 ip 地址。(如果 demo-master-a-1 同时有内网IP和外网IP,此处请使用内网IP)
|
||||
:::
|
||||
|
||||
|
||||
**创建 ./kubeadm-config.yaml**
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
cat <<EOF > ./kubeadm-config.yaml
|
||||
apiVersion: kubeadm.k8s.io/v1beta1
|
||||
kind: ClusterConfiguration
|
||||
kubernetesVersion: v1.15.1
|
||||
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
|
||||
controlPlaneEndpoint: "apiserver.demo:6443"
|
||||
networking:
|
||||
podSubnet: "10.100.0.1/20"
|
||||
EOF
|
||||
|
||||
```
|
||||
|
||||
::: tip
|
||||
podSubnet 所使用的网段不能与节点所在的网段重叠
|
||||
:::
|
||||
|
||||
|
||||
**初始化 apiserver**
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
kubeadm init --config=kubeadm-config.yaml --upload-certs
|
||||
```
|
||||
|
||||
::: tip
|
||||
根据您服务器网速的情况,您需要等候 1 - 10 分钟
|
||||
:::
|
||||
|
||||
执行结果如下图所示:
|
||||
|
||||

|
||||
|
||||
|
||||
|
||||
**初始化 root 用户的 kubectl 配置**
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
rm -rf /root/.kube/
|
||||
mkdir /root/.kube/
|
||||
cp -i /etc/kubernetes/admin.conf /root/.kube/config
|
||||
```
|
||||
|
||||
|
||||
|
||||
**安装 calico**
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
kubectl apply -f https://docs.projectcalico.org/v3.6/getting-started/kubernetes/installation/hosted/kubernetes-datastore/calico-networking/1.7/calico.yaml
|
||||
```
|
||||
|
||||
> 安装calico, 请参考https://docs.projectcalico.org/v3.6/getting-started/kubernetes/
|
||||
|
||||
|
||||
|
||||
**等待calico安装就绪:**
|
||||
|
||||
执行如下命令,等待 3-10 分钟,直到所有的容器组处于 Running 状态
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
watch kubectl get pod -n kube-system
|
||||
```
|
||||
|
||||
|
||||
**检查 master 初始化结果**
|
||||
|
||||
在 master 节点 demo-master-a-1 上执行
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
kubectl get nodes
|
||||
```
|
||||
|
||||
|
||||
|
||||
## 初始化 worker节点
|
||||
|
||||
### 获得 join命令参数
|
||||
|
||||
**在 master 节点 demo-master-a-1 节点执行**
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
kubeadm token create --print-join-command
|
||||
```
|
||||
|
||||
可获取kubeadm join 命令及参数,如下所示
|
||||
|
||||
``` sh
|
||||
# kubeadm token create 命令的输出
|
||||
kubeadm join apiserver.demo:6443 --token mpfjma.4vjjg8flqihor4vt --discovery-token-ca-cert-hash sha256:6f7a8e40a810323672de5eee6f4d19aa2dbdb38411845a1bf5dd63485c43d303
|
||||
```
|
||||
|
||||
|
||||
|
||||
### 初始化worker
|
||||
|
||||
**针对所有的 worker 节点执行**
|
||||
|
||||
``` sh
|
||||
# 只在 worker 节点执行
|
||||
echo "x.x.x.x apiserver.demo" >> /etc/hosts
|
||||
kubeadm join apiserver.demo:6443 --token mpfjma.4vjjg8flqihor4vt --discovery-token-ca-cert-hash sha256:6f7a8e40a810323672de5eee6f4d19aa2dbdb38411845a1bf5dd63485c43d303
|
||||
```
|
||||
|
||||
::: tip
|
||||
* 将 x.x.x.x 替换为 demo-master-a-1 的实际 ip。(如果 demo-master-a-1 同时有内网IP和外网IP,此处请使用内网IP)
|
||||
* 将 kubeadm join 命令后的参数替换为上一个步骤中实际从 demo-master-a-1 节点获得的参数
|
||||
:::
|
||||
|
||||
|
||||
### 检查初始化结果
|
||||
|
||||
在 master 节点 demo-master-a-1 上执行
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
kubectl get nodes
|
||||
```
|
||||
|
||||

|
||||
|
||||
|
||||
|
||||
## 移除 worker 节点
|
||||
|
||||
::: warning
|
||||
正常情况下,您无需移除 worker 节点,如果添加到集群出错,您可以移除 worker 节点,再重新尝试添加
|
||||
:::
|
||||
|
||||
在准备移除的 worker 节点上执行
|
||||
|
||||
``` sh
|
||||
# 只在 worker 节点执行
|
||||
kubeadm reset
|
||||
```
|
||||
|
||||
在 master 节点 demo-master-a-1 上执行
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
kubectl delete node demo-worker-x-x
|
||||
```
|
||||
|
||||
::: tip
|
||||
* 将 demo-worker-x-x 替换为要移除的 worker 节点的名字
|
||||
* worker 节点的名字可以通过在节点 demo-master-a-1 上执行 kubectl get nodes 命令获得
|
||||
:::
|
||||
|
||||
|
||||
## 安装 Ingress Controller
|
||||
|
||||
> Ingress官方文档:https://kubernetes.io/docs/concepts/services-networking/ingress/
|
||||
>
|
||||
> Ingress Controllers官网介绍:https://kubernetes.io/docs/concepts/services-networking/ingress-controllers/
|
||||
>
|
||||
> 本文中使用如下部署方式:https://kubernetes.github.io/ingress-nginx/deploy/baremetal/#using-a-self-provisioned-edge
|
||||
>
|
||||
> kubernetes支持多种Ingress Controllers,本文推荐使用 https://github.com/nginxinc/kubernetes-ingress
|
||||
|
||||
**在 demo-master-a-1 上执行**
|
||||
|
||||
``` sh
|
||||
# 只在 master 节点执行
|
||||
kubectl apply -f https://raw.githubusercontent.com/eip-work/eip-monitor-repository/master/dashboard/nginx-ingress.yaml
|
||||
```
|
||||
|
||||
**配置域名解析**
|
||||
|
||||
将域名 *.demo.yourdomain.com 解析到 demo-worker-a-2 的 IP 地址 z.z.z.z (也可以是 demo-worker-a-1 的地址 y.y.y.y)
|
||||
|
||||
**验证配置**
|
||||
|
||||
在浏览器访问 a.demo.yourdomain.com,将得到 404 NotFound 错误页面
|
||||
|
||||
::: tip
|
||||
由于需要申请域名,过程会比较繁琐,有如下两种替代方案:
|
||||
|
||||
* 在您的客户端机器(访问部署在K8S上的 web 应用的浏览器所在的机器)设置 hosts 配置;
|
||||
* 暂时放弃域名的配置,临时使用 NodePort 或者 `kubectl port-forward` 的方式访问部署在 K8S 上的 web 应用
|
||||
|
||||
:::
|
||||
|
||||
::: warning
|
||||
如果您打算将您安装的 Kubernetes 用于生产环境,请参考此文档 [Installing Ingress Controller](https://github.com/nginxinc/kubernetes-ingress/blob/v1.5.2/docs/installation.md),完善 Ingress 的配置
|
||||
:::
|
||||
|
||||
|
||||
## 下一步
|
||||
:tada: :tada: :tada:
|
||||
|
||||
您已经完成了 Kubernetes 集群的安装,下一步请:
|
||||
|
||||
[安装 Kuboard](/install/install-dashboard.html)
|
||||
BIN
install/install-k8s.assets/image-20190715085036593.png
Normal file
|
After Width: | Height: | Size: 241 KiB |
BIN
install/install-k8s.assets/image2019-07-15_09.01.21.png
Normal file
|
After Width: | Height: | Size: 162 KiB |
@ -30,11 +30,24 @@ Kuboard 的 Live Demo 环境使用的是如下拓扑结构,本文档描述了
|
||||
|
||||
完成安装后,对应的软件版本为:
|
||||
|
||||
* Kubernetes v1.15.1
|
||||
* Kubernetes v1.15.2
|
||||
* Docker 18.09.7
|
||||
|
||||

|
||||
|
||||
::: tip
|
||||
**关于二进制安装**
|
||||
|
||||
网上一直流传着一种 ***“二进制”*** 安装 Kubernetes 的方法,查了许久,未曾在 kubernetes.io 官方网站上看到任何关于此安装方法的介绍,也并没有看到任何关于 ***“二进制”*** 安装的优势,唯一的解释是:
|
||||
> 由于众所周知的原因,在国内无法直接访问Google的服务。二进制包由于其下载方便、灵活定制而深受广大kubernetes使用者喜爱,成为企业部署生产环境比较流行的方式之一
|
||||
|
||||
鉴于目前已经有比较方便的办法获得 kubernetes 镜像,我将回避 ***二进制*** 安装是否更好的争论。本文采用 kubernetes.io 官方推荐的 kubeadm 工具安装 kubernetes 集群。
|
||||
|
||||
:::
|
||||
|
||||
Kubernetes 历史版本安装:
|
||||
* [Kubernetes 1.15.1](./history-k8s/install-k8s-1.15.1.html)
|
||||
|
||||
|
||||
## 制作标准机镜像
|
||||
|
||||
@ -57,10 +70,12 @@ Kuboard 的 Live Demo 环境使用的是如下拓扑结构,本文档描述了
|
||||
|
||||
### 安装docker
|
||||
|
||||
**卸载旧版本**
|
||||
将下列代码行(包括 #及其后的备注)一次性拷贝到命令行终端执行
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
|
||||
# 卸载旧版本
|
||||
sudo yum remove -y docker \
|
||||
docker-client \
|
||||
docker-client-latest \
|
||||
@ -71,34 +86,25 @@ docker-logrotate \
|
||||
docker-selinux \
|
||||
docker-engine-selinux \
|
||||
docker-engine
|
||||
```
|
||||
|
||||
**设置 yum repository**
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
# 设置 yum repository
|
||||
sudo yum install -y yum-utils \
|
||||
device-mapper-persistent-data \
|
||||
lvm2
|
||||
sudo yum-config-manager \
|
||||
--add-repo \
|
||||
https://download.docker.com/linux/centos/docker-ce.repo
|
||||
```
|
||||
|
||||
**安装并启动 docker**
|
||||
# 安装并启动 docker
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
sudo yum install -y docker-ce-18.09.7 docker-ce-cli-18.09.7 containerd.io
|
||||
sudo systemctl enable docker
|
||||
sudo systemctl start docker
|
||||
```
|
||||
|
||||
**检查 docker 版本**
|
||||
# 检查 docker 版本
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
docker version
|
||||
|
||||
```
|
||||
|
||||
|
||||
@ -174,7 +180,7 @@ net.bridge.bridge-nf-call-iptables = 1
|
||||
|
||||
如下图所示
|
||||
|
||||

|
||||

|
||||
|
||||
执行命令以应用
|
||||
|
||||
@ -187,7 +193,7 @@ sysctl -p
|
||||
|
||||
``` sh
|
||||
# 在 master 节点和 worker 节点都要执行
|
||||
yum install -y kubelet-1.15.1 kubeadm-1.15.1 kubectl-1.15.1
|
||||
yum install -y kubelet-1.15.2 kubeadm-1.15.2 kubectl-1.15.2
|
||||
```
|
||||
|
||||
|
||||
@ -213,7 +219,7 @@ vim /usr/lib/systemd/system/docker.service
|
||||
|
||||
如下图所示
|
||||
|
||||

|
||||

|
||||
|
||||
|
||||
**设置 docker 镜像**
|
||||
@ -267,7 +273,7 @@ echo "x.x.x.x apiserver.demo" >> /etc/hosts
|
||||
cat <<EOF > ./kubeadm-config.yaml
|
||||
apiVersion: kubeadm.k8s.io/v1beta1
|
||||
kind: ClusterConfiguration
|
||||
kubernetesVersion: v1.15.1
|
||||
kubernetesVersion: v1.15.2
|
||||
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
|
||||
controlPlaneEndpoint: "apiserver.demo:6443"
|
||||
networking:
|
||||
@ -289,7 +295,7 @@ kubeadm init --config=kubeadm-config.yaml --upload-certs
|
||||
```
|
||||
|
||||
::: tip
|
||||
根据您服务器网速的情况,您需要等候 1 - 10 分钟
|
||||
根据您服务器网速的情况,您需要等候 3 - 10 分钟
|
||||
:::
|
||||
|
||||
执行结果如下图所示:
|
||||
|
||||
BIN
install/install-kubernetes.assets/image-20190715085036593.png
Normal file
|
After Width: | Height: | Size: 241 KiB |
BIN
install/install-kubernetes.assets/image2019-07-15_09.01.21.png
Normal file
|
After Width: | Height: | Size: 162 KiB |
@ -154,7 +154,7 @@ net.bridge.bridge-nf-call-iptables = 1
|
||||
|
||||
如下图所示
|
||||
|
||||

|
||||

|
||||
|
||||
|
||||
|
||||
@ -176,7 +176,7 @@ yum install -y kubelet-1.15.0 kubeadm-1.15.0 kubectl-1.15.0
|
||||
|
||||
如下图所示
|
||||
|
||||

|
||||

|
||||
|
||||
|
||||
|
||||
|
||||