# The Transformation and Modernization of Line's In-House Legacy Deployment System
###### tags: `DevOpsDays Taipei 2018` `9/12` `11:20~12:00` `Track A`

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## PMC 介紹
- PMC initially developed back in 2009
- Actively developed for 2-3 years
- Has Been a standard deployment tool (來不及打完T_T)
> 簡報裡面有的不急啦
> 同意，樓上不要太難過
> 好像也是還好，要被取代掉的系統

### PMC features

## flow problem

- subversion 不熱門了

- initial setup script needs triggerred by user

## PMC Architecture Problems

- single point of failure, only 1 PMC machine
- build & rsync & restart are not decoupled well
- storage(logs, artifacts...etc) is on PMC machine, we suffer storage problem

## Respect to Legacy System
-
- Respect , appreciate , and try to improve it

## Lession(PCMv3 重購失敗的學習)
scope 太大了，工程師無法等待feedback
users 收不到新的價值，也無法feedback給工程師
開發團隊的離開，是風險，尤其是對於小團隊來說

## What we Want to Achieve from 2016

## Steps

1. Rethink the concept mapping(site -> organization, Farm -> cluster)
2. Work on the more important API first(Inventory API, PMC deployment API)
3. Authentication Framework for APIs
4. Based on those APIs, build UI that provides new features & values or provide higher level service like Forestry.

## More to do in the future

- solve SPOF
- replacing shell scripts with python for better testability, readibility ...
- Reduce the effort of running initial setup script by developer

## Comparison with Containerized Application Management System

## kubernetes as a service

## Conclusion

- Respect and appreciate the legacy system
- Break the legacy system into small components
- Most important API first
- Provide new values to users in the new component
- Improve the system gradually
- Whether to completely rewrite the system depends on resources and resolution

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> 場外聊天室，歡迎在下方喇賽

請問有人可以支援PMC的全名嗎？第一次聽到 QAQ
Project Management Console 的樣子？
就他們自建系統吧
原來如此..難怪google沒資料XD

line 2009就有了喔...?
是說公司還軟體啊？

難得看到這麼奇妙的流程圖XD

還是很奇妙的流程圖XD

代碼放個一年半就會臭臭的，但是還是可以賺錢 XD

所以把shell script都改成python ？

用時下最好的技術重寫
寫超過半年怎麼辦

> 所以工程師有無限工作機會 哈

[一窩蜂驅動開發](https://blog.chunfuchao.com/?p=656&variant=zh-tw)

慢慢來比較快 覺得這句話是真的XD

就沒考慮用現成的嗎（被打

> 內部其他工程師會想要加功能
> >有時候現成工具沒有的功能就代表不是必要的

看來他們都還沒有 containerize 太多 workload

最後的比較怪怪的…

看敘述感覺蠻多都是現成工具有的東西啊

拍照軟體可以試試看 office lens 喔～
>好用！！！！
>昨天都靠那玩意拍截圖
>今天坐太偏就放棄了
windows:https://goo.gl/BNmf3K
apple: https://goo.gl/ETiYdH
> (舉手) 我用 Ubuntu ... 怎辦?
> 你手機用ubuntu手機歐？ 很少見欸
> 上面講的不是筆電的軟體喔...?
> 是手機app啦
> ok...thanks!

重寫一個系統，要考慮隊友！！（決心
不成功 就…
> 離職!