2018-10-12 13:30:19 +08:00
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## 00-集群规划和基础参数设定
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2017-11-30 15:01:24 +08:00
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多节点高可用集群部署步骤与[AllinOne部署](quickStart.md)基本一致,增加LB 负载均衡部署步骤。
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2019-01-26 12:30:56 +08:00
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- 注意1:请确保各节点时区设置一致、时间同步。 如果你的环境没有提供NTP 时间同步,推荐集成安装[chrony](../guide/chrony.md)
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- 注意2:如果需要在公有云上创建多主多节点集群,请结合阅读[在公有云上部署 kubeasz](kubeasz_on_public_cloud.md)
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2018-08-18 09:28:23 +08:00
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2019-01-26 12:22:31 +08:00
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## 高可用集群所需节点配置如下
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|角色|数量|描述|
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2019-01-26 12:30:56 +08:00
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|:-|:-|:-|
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2019-01-26 12:22:31 +08:00
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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|2|需要额外规划一个master VIP(虚地址),可根据需要提升机器配置或增加节点数|
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|lb节点|2|负载均衡节点两个,安装 haproxy+keepalived|
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|node节点|3|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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2017-11-30 15:01:24 +08:00
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2018-10-13 21:41:09 +08:00
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项目预定义了4个例子,请修改后完成适合你的集群规划,生产环境建议一个节点只是一个角色。
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2017-12-06 21:08:27 +08:00
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2018-10-23 19:23:36 +08:00
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+ [单节点](../../example/hosts.allinone.example)
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+ [单主多节点](../../example/hosts.s-master.example)
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+ [多主多节点](../../example/hosts.m-masters.example)
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+ [在公有云上部署](../../example/hosts.cloud.example)
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2017-11-30 15:01:24 +08:00
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## 部署步骤
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2018-10-23 19:23:36 +08:00
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按照[多主多节点](../../example/hosts.m-masters.example)示例的节点配置,准备4台虚机,搭建一个多主高可用集群。
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2017-12-18 22:56:59 +08:00
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### 1.基础系统配置
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2018-06-23 12:42:02 +08:00
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+ 推荐内存2G/硬盘30G以上
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2017-12-18 22:56:59 +08:00
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+ 最小化安装`Ubuntu 16.04 server`或者`CentOS 7 Minimal`
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+ 配置基础网络、更新源、SSH登陆等
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2017-12-21 19:24:39 +08:00
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### 2.在每个节点安装依赖工具
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2017-12-18 22:56:59 +08:00
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Ubuntu 16.04 请执行以下脚本:
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2017-11-30 15:01:24 +08:00
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``` bash
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# 文档中脚本默认均以root用户执行
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apt-get update && apt-get upgrade -y && apt-get dist-upgrade -y
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2017-12-18 22:56:59 +08:00
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# 安装python2
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2017-11-30 15:01:24 +08:00
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apt-get install python2.7
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# Ubuntu16.04可能需要配置以下软连接
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ln -s /usr/bin/python2.7 /usr/bin/python
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```
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2017-12-18 22:56:59 +08:00
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CentOS 7 请执行以下脚本:
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2017-11-30 15:01:24 +08:00
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``` bash
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2017-12-18 22:56:59 +08:00
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# 文档中脚本默认均以root用户执行
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# 安装 epel 源并更新
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yum install epel-release -y
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yum update
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# 安装python
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yum install python -y
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```
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2017-12-21 19:24:39 +08:00
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### 3.在deploy节点安装及准备ansible
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2017-12-18 22:56:59 +08:00
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2019-01-26 12:30:56 +08:00
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- pip 安装 ansible(如果 Ubuntu pip报错,请看[附录](00-planning_and_overall_intro.md#Appendix))
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2019-01-26 12:22:31 +08:00
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2017-12-18 22:56:59 +08:00
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``` bash
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# Ubuntu 16.04
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apt-get install git python-pip -y
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# CentOS 7
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yum install git python-pip -y
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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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2017-11-30 15:01:24 +08:00
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#pip install pip --upgrade
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#pip install ansible
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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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2018-06-14 00:20:16 +08:00
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2018-06-29 18:14:59 +08:00
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- 在deploy节点配置免密码登陆
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2017-12-18 22:56:59 +08:00
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2017-11-30 15:01:24 +08:00
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``` bash
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ssh-keygen -t rsa -b 2048 回车 回车 回车
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2017-12-21 19:24:39 +08:00
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ssh-copy-id $IPs #$IPs为所有节点地址包括自身,按照提示输入yes 和root密码
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2017-12-06 21:56:12 +08:00
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```
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2018-06-29 18:14:59 +08:00
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### 4.在deploy节点编排k8s安装
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2017-12-21 16:24:41 +08:00
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2018-06-29 18:14:59 +08:00
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- 4.1 下载项目源码
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2018-06-29 18:59:26 +08:00
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2017-12-21 16:24:41 +08:00
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``` bash
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2018-06-29 18:14:59 +08:00
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# 方式一:使用git clone
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2019-03-31 15:55:37 +08:00
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git clone --depth=1 https://github.com/gjmzj/kubeasz.git /etc/ansible
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2018-06-29 18:14:59 +08:00
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# 方式二:从发布页面 https://github.com/gjmzj/kubeasz/releases 下载源码解压到同样目录
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```
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- 4.2a 下载二进制文件
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2018-06-29 18:59:26 +08:00
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请从分享的[百度云链接](https://pan.baidu.com/s/1c4RFaA),下载解压到/etc/ansible/bin目录,如果你有合适网络环境也可以按照/down/download.sh自行从官网下载各种tar包
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2018-06-29 18:14:59 +08:00
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``` bash
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tar zxvf k8s.1-9-8.tar.gz # 以安装k8s v1.9.8为例
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2017-12-21 16:24:41 +08:00
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mv bin/* /etc/ansible/bin
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```
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2018-06-29 18:14:59 +08:00
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- 4.2b [可选]下载离线docker镜像
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服务器使用内部yum源/apt源,但是无法访问公网情况下,请下载离线docker镜像完成集群安装;从百度云盘把`basic_images_kubeasz_x.y.tar.gz` 下载解压到`/etc/ansible/down` 目录
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2018-06-29 18:59:26 +08:00
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2017-12-06 21:56:12 +08:00
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``` bash
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2019-03-31 16:00:59 +08:00
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tar zxvf basic_images_kubeasz_1.0.tar.gz -C /etc/ansible/down
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2017-12-06 21:56:12 +08:00
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```
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2018-06-29 18:14:59 +08:00
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- 4.3 配置集群参数
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2018-08-10 15:58:08 +08:00
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- 4.3.1 必要配置:`cd /etc/ansible && cp example/hosts.m-masters.example hosts`, 然后实际情况修改此hosts文件
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- 4.3.2 可选配置,初次使用可以不做修改,详见[配置指南](config_guide.md)
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- 4.3.3 验证ansible 安装:`ansible all -m ping` 正常能看到节点返回 SUCCESS
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2018-06-29 18:59:26 +08:00
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2018-06-29 18:14:59 +08:00
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- 4.4 开始安装
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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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2018-06-29 18:59:26 +08:00
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2017-11-30 15:01:24 +08:00
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``` bash
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2018-03-17 17:00:42 +08:00
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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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2018-06-19 21:45:17 +08:00
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ansible-playbook 07.cluster-addon.yml
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2018-03-17 17:00:42 +08:00
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# 一步安装
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2018-06-29 18:14:59 +08:00
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#ansible-playbook 90.setup.yml
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2017-11-30 15:01:24 +08:00
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```
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2017-11-30 18:25:47 +08:00
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2018-06-29 18:14:59 +08:00
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+ [可选]对集群所有节点进行操作系统层面的安全加固 `ansible-playbook roles/os-harden/os-harden.yml`,详情请参考[os-harden项目](https://github.com/dev-sec/ansible-os-hardening)
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2019-01-26 12:22:31 +08:00
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## Appendix
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- Ubuntu 1604 安装 ansible 如果出现以下错误
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``` bash
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Traceback (most recent call last):
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File "/usr/bin/pip", line 9, in <module>
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from pip import main
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ImportError: cannot import name main
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```
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将`/usr/bin/pip`做以下修改即可
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``` bash
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#原代码
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from pip import main
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if __name__ == '__main__':
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sys.exit(main())
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#修改后
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from pip import __main__
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if __name__ == '__main__':
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sys.exit(__main__._main())
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```
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2018-06-29 18:14:59 +08:00
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2018-10-12 13:30:19 +08:00
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[后一篇](01-CA_and_prerequisite.md)
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