FISL 15: Continuously serving the OSS community with Continuous Integration and Delivery
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Snap CI now enables public GitHub repositories to do Continuous Integration(CI) and Continuous Delivery(CD) for free. When doing CD, the goal is to automate the process of deployment and build software in a way that can be deployed to production anytime. To achieve this, we need to figure out a way to deploy the application that doesn't interrupt the users using the system. Learning about this process will allow you to reduce the frictions and delays for deploying new features and bug fixes to production. Your application needs to change in a way that understands this process. You will learn about application and deployment pipelines and the different ways to deploy. In this talk we will touch upon some common deployment pipelines. We will cover in detail about how we changed Snap to do deployments that didn't affect our customers, the challenges we faced and some patterns that helped us overcome them. What made this challenging was the data migrations and long running builds of our customers that made it difficult to figure out when to cut over.
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FISL 15: Continuously serving the OSS community with Continuous Integration and Delivery
- 1. Continuously serving the OSS community with Continuous Integration and Delivery Akshay Karle ! Fernando Júnior
- 2. “How long would it take your organization to deploy a change that involves just one single line of code?” Mary and Tom Poppendieck
- 3. “(…) build software in such a way that the software can be released to production at any time.” Martin Fowler
- 8. CONTINUOUS DELIVERY ! ! ▫︎ Continuous Integration ! ▫︎ Automated tasks ! ▫︎ Repeatable/reliable process
- 12. DEPLOYING YOUR APPLICATION ! ! ▫︎ Database migrations ! ▫︎ Infrastructure update ! ▫︎ Restarting services
- 13. ZERO DOWNTIME DEPLOYMENTS Deployment process of your application has got to be transparent for end users
- 14. WHO WE ARE? Developer, Snap CI /nandopaf /fernando-alves /nand0paf Developer, Snap CI /akshay_karle /akshaykarle /akshay_ka
- 15. WHAT WE DO? ! ! ! ! ▫︎Continuous Integration for repositories on GitHub ▫︎SaaS ▫︎Helps you do Continuous Delivery ▫︎Free for open source projects
- 16. SNAP INSIDE-OUT
- 17. LIFECYCLE OF A BUILD
- 18. LIFECYCLE OF A BUILD
- 19. LIFECYCLE OF A BUILD
- 20. LIFECYCLE OF A BUILD head repository commit
- 21. LIFECYCLE OF A BUILD head repository commit
- 22. LIFECYCLE OF A BUILD head repository commit DATABASE
- 23. LIFECYCLE OF A BUILD head repository commit DATABASE
- 24. LIFECYCLE OF A BUILD head repository commit DATABASE
- 25. Babysitters LIFECYCLE OF A BUILD head repository commit DATABASE
- 26. Babysitters LIFECYCLE OF A BUILD head repository commit DATABASE
- 27. Babysitters LIFECYCLE OF A BUILD head repository commit DATABASE
- 28. LIFE CYCLE ! ▫︎ Prepare the container ▫︎ Starts database ▫︎ Sets PATH ▫︎ Download artifacts ▫︎Git clone ▫︎Runs each pipeline stage ▫︎Upload artifacts DATABASE
- 29. Babysitters LIFECYCLE OF A BUILD head repository commit DATABASE
- 30. Babysitters LIFECYCLE OF A BUILD head repository commit DATABASE
- 33. ARCHITECTURE OVERVIEW ! ! ▫︎ Rails app fronted by apache ! ▫︎ Receives the hooks from GitHub Database web server
- 35. ARCHITECTURE OVERVIEW L B Build Server web server Database
- 36. ARCHITECTURE OVERVIEW ! ▫︎ Background jobs ▫︎ Babysitters ▫︎ Build Queue ▫︎ Artifacts ! ▫︎ OpenVZ Containers ▫︎ Virtual machines where the pipeline runs Build Server
- 37. ARCHITECTURE OVERVIEW L B Build Server web server Database
- 38. OUR DEPLOYMENT ! ▫︎ Do have automated scripts ! ▫︎ Deployment pipeline ! ▫︎ 1-click deploy ▫︎ Sort of… Babysitters DATABASE L B Build Server Database web server
- 39. OUR DEPLOYMENT ! ▫︎ Wait for all builds to finish ! ▫︎ Put app on maintenance mode ▫︎ No new requests picked up ! ▫︎ Deploy and wait for migrations Babysitters DATABASE L B Database VZHOSTBuild Server web server
- 41. BLUE-GREEN DEPLOYMENT Web Server App Server Database
- 42. BLUE-GREEN DEPLOYMENT Web Server App Server Database App ServerApp ServerWeb Server Database
- 43. BLUE-GREEN DEPLOYMENT Web Server App Server Database App ServerApp ServerWeb Server Database
- 44. BLUE-GREEN DEPLOYMENT App ServerApp ServerWeb Server Database
- 45. BLUE-GREEN DEPLOYMENTS FOR SNAP VZHOSTBuild Server web server VZHOSTBuild Server web server L B DATABASE
- 46. BLUE-GREEN DEPLOYMENTS FOR SNAP VZHOSTBuild Server web server VZHOSTBuild Server web server L B DATABASE
- 47. CHALLENGES IN SNAP Long running builds Database migrations
- 48. CHALLENGES IN SNAP Long running builds
- 49. LONG RUNNING BUILDS VZHOSTBuild Server web server VZHOSTBuild Server web server L B DATABASE
- 50. LONG RUNNING BUILDS VZHOSTBuild Server web server VZHOSTBuild Server web server L B DATABASE
- 51. LONG RUNNING BUILDS ! ▫︎ Builds should continue to run ! ▫︎ Artifacts should continue to be served
- 52. COLOR AWARE BABYSITTERS Build Server Green Stack Build Server Blue Stack
- 53. COLOR AWARE BABYSITTERS Build Server Green Stack Build Server Blue Stack web server
- 57. THE SWITCH L B
- 58. THE SWITCH L B
- 59. THE SWITCH L B
- 60. THE SWITCH L B
- 61. THE SWITCH L B
- 62. THE SWITCH L B
- 63. THE SWITCH L B
- 64. CHALLENGES IN SNAP Long running builds Database migrations
- 65. CHALLENGES IN SNAP Database migrations
- 67. DATABASE MIGRATIONS Pipelines Counter Duration App v1.0 App v1.0 L B Upgrading to v2.0, migrating
- 68. DATABASE MIGRATIONS Pipelines Counter App v2.0 App v1.0 L B
- 69. Cannot have destructive migrations
- 70. MIGRATIONS IN PHASES Pipelines Counter Duration App v1.0 App v1.0 L B
- 71. MIGRATIONS IN PHASES Pipelines Counter Duration App v1.0 App v1.0 Upgrading to v2.0 L B
- 72. MIGRATIONS IN PHASES Pipelines Counter Duration App v2.0 App v1.0 L B
- 73. MIGRATIONS IN PHASES Pipelines Counter Duration App v2.0 App v1.0 L B
- 74. MIGRATIONS IN PHASES Pipelines Counter Duration App v2.0 App v1.0 L B
- 75. MIGRATIONS IN PHASES Pipelines Counter Duration App v2.0 App v1.0 Upgrading to v3.0 L B
- 76. MIGRATIONS IN PHASES App v2.0 App v3.0 Pipelines Counter L B
- 77. MIGRATIONS IN PHASES App v2.0 App v3.0 Pipelines Counter L B
- 78. LESSONS LEARNT
- 80. Watch out your data
- 81. Things will go wrong