Class.devops.chapter.1.intro
DevOps is an approach to speed up application delivery through automation. It involves continuous integration, deployment automation, and test automation. Continuous integration involves frequent builds and automated unit testing. Deployment automation enables fast, reliable, and continuous deployment to servers. Test automation includes unit, smoke, integration, UI, static code analysis, and security testing. DevOps principles include fast failure, continuous delivery, automated and repeatable processes, building once, keeping deployed binaries and versioning, and separating development and operations duties. The DevOps toolchain manages software configuration, application deployment, builds, packaging, delta deployment, zero-downtime deployment, rollbacks, cleanups, and is maintained by operations.
Class.devops.chapter.1.intro
- 1. Intro to DevOps =============== **XXXX XXXX**
- 2. ##About DevOps -DevOps is approach to speed up application delivery, via a series of **AUTOMATION**
- 3. ##(a) Continuous integration -Delivery pipe for mainline -Frequent builds -Pull from source control -Automate unit tests
- 4. ##(b) Deployment automation -Fast: The total time from changed source, to deploy to server -Reliable: It runs with repeated process -Continuous deployment to servers
- 5. ##(c) Test automation -Unit test (e.g. Junit) -Smoke test (simple web test) -Integration test (api tests) -UI test (selenium) -Static code analysis -Security test
- 6. ##App deployment covers -your app code -> -your app data -> -vendor app -> -vendor middleware -> Full Stack Code Data App/Runtime Middleware OS Virtualization Servers Storage Networking
- 7. ##DevOps principles -Fast fail -Continuous delivery -Automated/repeatable process -Build once -Keep deployed binaries & versioning -Separation of duty: Dev & Ops
- 8. ##DevOps toolchain -Software configuration management - >versioning on source code file (e.g. *.java) - >maintained by Dev -App deployment tool - >store compiled binary - >versioning on deployed binaries (e.g. *.EAR); app & server configuration - >automate deployment procedure - >invoke build engine (jenkins); package manager (npm, apt-get, cocoapod) - >delta deployment - >zero-downtime deployment - >rollback & cleanup procedure - >maintained by Ops
- 9. ##How it works 1.@dev commits changes 2.CI engine runs to extract mainline/latest code 3.**Deploy** install the apps with right configuration & process
- 10. ##Exercise 1.Calculate how much time do you require to deploy a J2EE application, after a changed source is check-in, without compilation error? 2.How much DevOps engineer do you employ to maintain the X number of server?