在线答疑

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## 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/](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 apple-master-a-1 上执行
```bash
su - gitlab-runner
kubectl apply -f https://raw.githubusercontent.com/eip-work/eip-monitor-repository/master/dashboard/nginx-ingress.yaml
```
### 在IaaS云控制台完成如下配置**公网ELB**
创建负载均衡 ELB
监听器 180 / TCP SOURCE_ADDRESS 会话保持
服务器资源池 1 apple-worker-x-x 的所有节点的 80端口
监听器 2443 / TCP SOURCE_ADDRESS 会话保持
服务器资源池 2 apple-worker-x-x 的所有节点的443端口
假设刚创建的负载均衡 ELB 的 IP 地址为: z.z.z.z
### 配置域名解析
将域名 *.apple.yourdomain.com 解析到地址负载均衡服务器 的 IP 地址 z.z.z.z
### 验证配置
在浏览器访问 a.apple.yourdomain.com将得到 404 NotFound 错误页面

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## 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
- gitlab-runner
- kubernetes images
本文档描述的安装过程已基于 centos 7.6 验证
标准机镜像的制作过程描述如下:
### 安装docker
**卸载旧版本**
```bash
sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-selinux \
docker-engine-selinux \
docker-engine
```
**下载依赖包及安装包**
```bash
wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm
wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-cli-18.09.7-3.el7.x86_64.rpm
wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-18.09.7-3.el7.x86_64.rpm
```
**安装**
```bash
sudo yum install -y containerd.io-1.2.6-3.3.el7.x86_64.rpm
sudo yum install -y docker-ce-cli-18.09.7-3.el7.x86_64.rpm
sudo yum install -y docker-ce-18.09.7-3.el7.x86_64.rpm
sudo systemctl enable docker
```
**启动 docker 服务**
```bash
sudo systemctl start docker
```
**检查 docker 版本**
```bash
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**
```bash
sudo yum install 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**
```bash
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swap、防火墙**
```bash
swapoff -a
```
**关闭SeLinux**
```bash
setenforce 0
```
**修改 /etc/sysctl.conf**
```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
![image-20190715085036593](./install-common-vm.assets/image-20190715085036593.png ':size=600x445')
**安装kubelet、kubeadm、kubectl**
```bash
yum install -y kubelet-1.15.0 kubeadm-1.15.0 kubectl-1.15.0
```
**修改docker Cgroup Driver为systemd**
```vim /usr/lib/systemd/system/docker.service```
向其中他添加
```--exec-opt native.cgroupdriver=systemd```
如下图所示
![屏幕快照 2019-07-15 09.01.21](./install-common-vm.assets/image2019-07-15_09.01.21.png ':size=1000x326')
重启 docker
```
systemctl daemon-reload
systemctl restart docker
```
**启动kubelet**
```bash
systemctl enable kubelet && systemctl start kubelet
```
**加载 kubernetes 镜像**
由于k8s服务相关镜像在国外镜像源国内无法访问
执行以下命令添加docker k8s国内镜像源
```bash
curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io
systemctl restart docker
```
**拉取k8s相关镜像**
```bash
docker pull mirrorgooglecontainers/kube-apiserver:v1.15.0
docker pull mirrorgooglecontainers/kube-controller-manager:v1.15.0
docker pull mirrorgooglecontainers/kube-scheduler:v1.15.0
docker pull mirrorgooglecontainers/kube-proxy:v1.15.0
docker pull mirrorgooglecontainers/pause:3.1
docker pull mirrorgooglecontainers/etcd:3.3.10
docker pull coredns/coredns:1.3.1
```
**更改镜像名为k8s官网镜像**
```bash
docker tag d235b23c3570 k8s.gcr.io/kube-proxy:v1.15.0
docker tag 201c7a840312 k8s.gcr.io/kube-apiserver:v1.15.0
docker tag 2d3813851e87 k8s.gcr.io/kube-scheduler:v1.15.0
docker tag 8328bb49b652 k8s.gcr.io/kube-controller-manager:v1.15.0
docker tag da86e6ba6ca1 k8s.gcr.io/pause:3.1
docker tag eb516548c180 k8s.gcr.io/coredns:1.3.1
docker tag 2c4adeb21b4f k8s.gcr.io/etcd:3.3.10
```
**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

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# 创建 kube-dns Service

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网上那么多 K8S 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
* **众多网友验证,并在线提出修改意见**
![image-20190806065321567](./install-k8s.assets/image-20190806065321567.png)
* 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)
* **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)
![image-20190806070341727](./install-k8s.assets/image-20190806070341727.png)
* **在线答疑**
![kuboard_qq.png](../overview/README.assets/kuboard_qq.png)
## 配置要求
对于 Kubernetes 初学者,推荐在阿里云采购如下配置: