DevOps

Implement by Kubernetes

https://slides.com/rockwyc992/devops

Agenda

• What's DevOps?

• What's Kubernetes?

• How to use them together?

Why do I use DevOps?

常見的開發情況

• 我的電腦可以跑，為什麼你的不行?

• 不知道剛剛改了什麼，程式就壞掉了

• 需．求．變．更 => 大．災．難

常見的維運情況

• 為什麼你的電腦可以跑，我的卻不行?

• 不知道怎麼安裝，或是安全性問題一大堆

• 這是上個月安裝的，我已經忘記怎麼安裝了

常見的各種情況

• 不敢重開機、不敢升級

• 缺乏測試，Bug 滿天飛

What's DevOps?

https://commons.wikimedia.org/wiki/File:Devops.svg

https://www.zaizi.com/devops

Dev

Ops

https://commons.wikimedia.org/wiki/File:Agile-vs-iterative-flow.jpg

How to improve our workflow?

• Git Flow

• Gitlab CI

• [WIP] Unit Test

• Prometheus / fluentd

Monitor

Code

Build, Release, Deploy

Test

The Mythical Man-Month

http://www.books.com.tw/products/0010254508

No Silver Bullet

(人月神话)

A story about baking cake

http://www.infoq.com/cn/articles/delivering-software-water-scrum-fall

Water Scrum Fall

Seems like Sliver Bullet

• OOP

• MVC

• Agile

• Docker

Why Git Flow?

use git like dropbox

branching model for git

semver

(Semantic Versioning)

4 . 14 . 1

compatible

new feature

non-compatible

hot-fix

Who use git flow?

1. yarn

2. bootkube

3. example

(migrate from npm)

Gitlab CI

Reference

https://about.gitlab.com/2016/08/26/ci-deployment-and-environments/

What's CI/CD?

• Continuous Integration

• Continuous Delivery

Unit Test

1. TDD / BDD

2. Mock / Stub

3. Refactoring

4. Test Coverage

5. Test for failure

Other Method

1. e2e testing

2. A / B Test

3. Canary release

4. Blue / Green Release

5. Nightly Build

Final Target

1. Auto Test

2. Auto Deploy

3. Faster Coding, Less Bug

4. CaaS (Code as a Service)

5. Rolling Update / Rollback

6. High Avilible / Auto Healing

Before we go ahead

What's Kubernetes

Kubernetes is an open source system 
for managing Docker across multiple hosts.

A Project of CNCF

What's Kubernetes

Kubernetes is an open source system 
for managing Docker across multiple hosts.

• Docker

• Micro-service / Stateless

• Multi-host

• Self-healing

• Rolling Update

• Open Source (Apache 2.0)

Rolling Update

https://www.slideshare.net/DanielSmith272/whats-new-in-kubernetes

So, what's Docker?

So, what's Docker?

So, what's Docker?

So, what's Docker?

So, what's Docker?

Docker

• Execute Faster
• Launch Faster
• Less Disk & Less Memory
• Scale up quickly
• More compatibility
• RestAPI
• OpenSouce (Apache 2.0)

VM

• Easy to use
• Easy to debug
• Easy to design
• More secure
• Keep all change

Kubernetes Architecture

Kubernetes Architecture

How to deploy

• Matchbox

• Install

• init for webapp

• CI / CD

• Deploy

All pods in Kubernetes

Gitlab CI/CD Pipeline

https://about.gitlab.com/2016/08/26/ci-deployment-and-environments/

Gitlab CI/CD Pipeline

https://about.gitlab.com/2016/08/26/ci-deployment-and-environments/

Gitlab CI/CD Pipeline

https://about.gitlab.com/2016/08/26/ci-deployment-and-environments/

Gitlab CI/CD Pipeline

https://about.gitlab.com/2016/08/26/ci-deployment-and-environments/

Gitlab CI/CD Pipeline

https://about.gitlab.com/2016/08/26/ci-deployment-and-environments/

Gitlab CI/CD Pipeline

https://about.gitlab.com/2016/08/26/ci-deployment-and-environments/

Gitlab CI/CD Pipeline

Gitlab CI/CD Pipeline

https://about.gitlab.com/2016/08/26/ci-deployment-and-environments/

What have we done?

Gitlab CI/CD Pipeline

todo: .gitlab-ci.yaml

Gitlab CI/CD Pipeline

todo: .gitlab-ci.yaml

todo: runner、running dashboard

Gitlab CI/CD Pipeline

todo: pipeline

Gitlab CI/CD Pipeline

todo: environment

Gitlab CI/CD Pipeline

Example

• vmware/harbor

• cmuh.webapi/property-manager

• cmuh.webapp/property-manager

• cmuh.webapp/health-manager

Summy

• Change the habit with coding & pushing code.

• Just copy the file at Kubernetes-CI into your code.
  All magic things will be done by Gitlab CI & Kubernetes.

• TDD / BDD for your code. It would do more job now,
  but it will let you do less job at the future.

Have we done all things?

Q&A

Thanks

for your attention!