环境准备（本机）：CPU: CORE i5 内存:8G

相关的基础知识，请自行百度一下。

1. 准备3台虚拟机

192.168.180.100 k8s-master

192.168.180.101 k8s-node1

192.168.180.102 k8s-node2

2. 安装K8S和docker

请自行百度一下，有很多相关教程。当然有很多坑也需要自行解决，这里就不一一讲解了。安装版本K8S: 1.14.2 docker:18.09.6。

[root@k8s-master ~]# kubectl get nodes

NAME STATUS ROLES AGE VERSION

k8s-master Ready master 354d v1.14.2

k8s-node-1 Ready 354d v1.14.2

k8s-node-2 Ready 354d v1.14.2

[root@k8s-master ~]# docker version

Client:

Version: 18.09.6

API version: 1.39

Go version: go1.10.8

Git commit: 481bc77156

Built: Sat May 4 02:34:58 2019

OS/Arch: linux/amd64

Experimental: false

Server: Docker Engine - Community

Engine:

Version: 18.09.6

API version: 1.39 (minimum version 1.12)

Go version: go1.10.8

Git commit: 481bc77

Built: Sat May 4 02:02:43 2019

OS/Arch: linux/amd64

Experimental: false

3. 查看可视化界面

4. 部署tomcat

5. 容器扩容、缩容

实验证明最好是在master上面用命令来操作更可靠点。

[root@k8s-master nginx-tomcat]# kubectl scale deployment tomcathost --replicas=3

deployment.extensions/tomcathost scaled

[root@k8s-master nginx-tomcat]#

[root@k8s-master nginx-tomcat]# kubectl scale deployment tomcathost --replicas=2

deployment.extensions/tomcathost scaled

[root@k8s-master nginx-tomcat]#

6. 查看容器日志

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