Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications, whether on laptops,data center VMs, or the cloud.

1. Docker
at the gate
huangchengkai@360.net
Lean session in 30 min S02

2. What is Docker
Docker is an open platform for developers and sysadmins to
build, ship, and run distributed applications, whether on
laptops,data center VMs, or the cloud.
核心技术=LXC + AUFS

3. How LXC works
Kernel namespaces (ipc, uts, mount, pid, network and user)
Apparmor and SELinux profiles
Seccomp policies
Chroots (using pivot_root)
Kernel capabilities
CGroups (control groups)

4. Docker vs Traditional VM

5. What is AUFS

6. Image, container and registry
Image <-> Container
公库，镜像库和私库
repo.bigdata.360es.cn/library/Jenkins
sonarqube:alpine

7. 主要命令和生命周期

8. Architecture of Docker

9. 其他命令
docker rm 删除镜像
docker logs 打印控制台输出
docker inspect 查看容器详情
docker attach 连接到容器内的控制台
docker stats 资源消耗

10. 重要参数
-v 挂载
--name 容器名称
--network 网络
-p 宿主机端口映射
-it 交互模式
-d 后台模式
--rm stop之后自动移除
-e 设置环境变量

11. docker-compose
Compose is a tool for defining and running multi-container
Docker applications. With Compose, you use a Compose file to
configure your application's services. Then, using a single
command, you create and start all the services from your
configuration.
人话版本：命令行太复杂了，把参数配置化，用来大规模应用的编排

12. 示例
--name
--restart
-e
-p
-v
--network
docker network create prom_network

13. docker-compose vs
shell+docker
docker-compose更严格更规范，更容易维护
shell+docker更灵活，能实现更多自定义的逻辑
docker-compose更适合编排设施或者做正式发布等更固化更容易描述的业务
逻辑
shell+docker更适合本地或者开发环境上描述变化比较快的应用发布流程

14. local-dev-env
https://git01.360es.cn/SNC/local-dev-env
docker(docker-compose) + makefile
常用场景覆盖
测试人员：make all-up
Agent工程师：make simulator-up ，make odl-up
ODL工程师：make odl-dev-up
Commander工程师：make infra-up，make odl-up，make odl-dev-up

15. 资源开销
整个系统在初始化完成后约占1.5G内存
Commander 600+mb
ODL 700+mb

16. 谢谢