mirror of https://github.com/easzlab/kubeasz.git
docs: 增加腾讯云安装示例
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### <center>腾讯云 CVM CentOS 系统 kubernetes 集群部署</center>
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文档中脚本默认均以 root 用户执行
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#### 高可用集群所需节点配置如下
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----
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|角色|数量|描述|
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|:-|:-|:-|
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|deploy节点|1|运行这份 ansible 脚本的节点|
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|etcd节点|3|注意etcd集群必须是1,3,5,7...奇数个节点|
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|master节点|3|共用etcd节点，master VIP(虚地址)在云管理后台创建，可根据需要提升机器配置或增加节点数|
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|node节点|2|运行应用负载的节点，可根据需要提升机器配置或增加节点数|
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#### 环境准备
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----
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##### 创建 CVM 实例
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- 准备6台虚机，搭建一个多主高可用集群，`Node` 节点内存不低于 4GB
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- 生产环境一个节点只担任一个角色
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- 1个 `deploy` 节点 网段 10.0.0.3/21
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- 3个 `master` 节点 网段 10.0.8.0/21 ，建议采用 SSD 类型磁盘
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- 2个或以上 `node` 节点 网段 10.0.8.0/21
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##### 创建 master vip
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- 云负载均衡中创建传统型内网 CLB, 区域与 CVM 相同，取名为 `k8s-master-lb`，假定为 `10.0.8.12`
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- 创建 TCP 类型监听器，前端监听 `8443` 端口，转发后端 `6443` 端口
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- 绑定 `master` 节点到监听器
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##### 创建 ingress vip （收费类型 可在集群创建成功后操作）
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- 云负载均衡中创建应用型外网 CLB, 区域与 CVM 相同，取名为 `k8s-ingress-lb`
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- 创建 TCP 类型监听器，前端监听 `23457` 端口，转发后端 `23457` 端口
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- 创建 TCP 类型监听器，前端监听 `23456` 端口，转发后端 `23456` 端口
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- 绑定 `node` 节点到监听器
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#### 部署步骤
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----
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##### 0. 基础系统配置
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+ 使用自定义系统镜像 `k8s-node` 安装系统
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+ 配置基础网络、更新源、SSH登陆等
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+ 腾讯云后台创建 CLB
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##### 1. 以 `CentOS 7.x 64bit` 镜像初始化 CVM 实例安装 deploy 节点
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- 更新本节点主机名
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```bash
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hostnamectl set-hostname deploy
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# 重新登录
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```
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- 更新主机节点列表
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编辑文件
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```bash
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vi /etc/hosts
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```
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删除云主机自动创建的回环主机名映射行，如下类似
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```
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127.0.0.1 VM_0_15_centos VM_0_15_centos
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::1 VM_0_15_centos VM_0_15_centos
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```
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根据服务器配置添加主机列表，添加
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```
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10.0.0.3 deploy
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10.0.8.2 master01
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10.0.8.3 master02
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10.0.8.4 master02
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10.0.8.10 node01
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10.0.8.11 node02
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```
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##### 2. 在deploy节点安装及准备ansible
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pip 安装 ansible
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``` bash
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yum install python-pip -y
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# pip安装ansible （腾讯云服务器自带加速）
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pip install pip --upgrade
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pip install ansible
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# pip安装ansible(国内如果安装太慢可以直接用pip阿里云加速)
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pip install pip --upgrade -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com
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pip install --no-cache-dir ansible -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com
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```
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##### 3. 资源准备
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- 克隆源码
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```bash
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git clone --depth=1 -b cvm https://github.com/waitingsong/kubeasz.git /etc/ansible
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```
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- 下载 k8s 二进制文件
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从分享的[百度云链接](https://pan.baidu.com/s/1c4RFaA)，下载解压到 `/etc/ansible/bin` 目录
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```bash
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# 以安装k8s v1.13.5为例
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tar -xvf k8s.1-13-5.tar.gz -C /etc/ansible/
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```
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- 生成离线 docker 镜像
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```bash
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wget https://raw.githubusercontent.com/waitingsong/blog/master/201904/assets/make_basic_images_bundle.sh
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wget https://raw.githubusercontent.com/waitingsong/blog/master/201904/assets/make_extra_images_bundle.sh
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wget https://raw.githubusercontent.com/waitingsong/blog/master/201904/assets/make_istio_images_bundle.sh
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chmod a+x make_basic_images_bundle.sh
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chmod a+x make_extra_images_bundle.sh
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chmod a+x make_istio_images_bundle.sh
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# 根据需要执行脚本进行下载并打包 xz 格式压缩时间比较长
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# 分别生成以下文件
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# /tmp/basic_images_kubeasz_1.0.tar.xz
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# /tmp/extra_images_kubeasz_1.0.tar.xz
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# /tmp/istio_images_bundle_1.1.3.tar.xz
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./make_basic_images_bundle.sh dump
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./make_extra_images_bundle.sh dump
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./make_istio_images_bundle.sh dump
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```
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- 下载离线 docker 镜像
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将上一步生成的文件和脚本文件拷贝到 deploy 节点服务器相同目录下执行
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istio 安装见文档 [istio_install.md](./istio_install.md)
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```bash
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./make_basic_images_bundle.sh extract
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./make_extra_images_bundle.sh extract
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```
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##### 4. 配置集群参数
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```bash
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cd /etc/ansible && cp example/hosts.cloud.example hosts
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```
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编辑此 hosts 文件
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```bash
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vi /etc/ansible/hosts
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```
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更新以下内容
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```
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# deploy 节点的地址
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10.0.0.3 NTP_ENABLED=yes
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[etcd]
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10.0.8.2 NODE_NAME=etcd1
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10.0.8.3 NODE_NAME=etcd2
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10.0.8.4 NODE_NAME=etcd3
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[kube-master]
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10.0.8.2
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10.0.8.3
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10.0.8.4
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[kube-node]
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10.0.8.10
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10.0.8.11
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MASTER_IP="10.0.8.12" # 即 master vip 负载均衡内网地址
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```
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##### 5. 编排k8s安装
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如果你对集群安装流程不熟悉，请阅读项目首页 **安装步骤** 讲解后分步安装，并对 **每步都进行验证**
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验证 ansible 执行 正常能看到所有节点返回 SUCCESS
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```bash
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ansible all -m ping
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```
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执行安装
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```bash
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cd /etc/ansible
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# 一步安装
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ansible-playbook 90.setup.yml
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# 分步安装
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ansible-playbook 01.prepare.yml
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ansible-playbook 02.etcd.yml
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ansible-playbook 03.docker.yml
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ansible-playbook 04.kube-master.yml
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ansible-playbook 05.kube-node.yml
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ansible-playbook 06.network.yml
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ansible-playbook 07.cluster-addon.yml
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# 把 k8s 集群 ca 证书加入本机信任列表
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cp /etc/kubernetes/ssl/ca.pem /etc/pki/ca-trust/source/anchors/ && update-ca-trust
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```
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#### 查看集群状态
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```bash
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kubectl cluster-info
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kubectl get cs
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kubectl get node
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kubectl get pod,svc --all-namespaces -o wide
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kubectl top node
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```
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#### 资源
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- [kubeasz](https://github.com/gjmzj/kubeasz)
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- [镜像打包脚本](https://github.com/waitingsong/blog/tree/master/201904/assets)
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origin by [waitingsong](https://github.com/waitingsong/blog/blob/master/201904/k8s_cvm_intro.md)
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