Phoenix Servers with Packer

In this presentation we define the notion of Phoenix Servers (by Martin Fowler) and present a way to achieve this with packer.io.

Transcript

1. BY NILS DE MOOR @NDEMOOR PHOENIX SERVERS WITH PACKER.IO
2. WE TEST EVERY BIT OF OUR SOFTWARE... ...SO WHY NOT TESTING OUR SERVERS
3. CONFIG MANAGEMENT CLEAN SERVER INSTALL CONFIG MGMT AGENT (CHEF, PUPPET, ANSIBLE,...) COMPOSE SCRIPTS & RUN AGENT SERVER in desired STATE Change version Edit config file Add/remove library Create folder/link/... ....
4. CONTINUOUS DEPLOYMENT PUSH CODE RUN TESTs BUILD
5. CONTINUOUS DEPLOYMENT PUSH CODE RUN TESTs BUILD CLEAN SERVER INSTALL CONFIG MGMT AGENT (CHEF, PUPPET, ANSIBLE,...) COMPOSE SCRIPTS & RUN AGENT SERVER in desired STATE D EPLO Y
6. PITFALLS WHAT IF... • IDEMPOTENCE IS NOT GUARANTEED? • NOT EVERY PIECE IS REMOVED ON DELETE? • MY CONFIG SERVER IS DOWN? • REPOSITORIES ARE UNAVAILABLE? • AGENT WORKS LONG WHEN AUTOSCALING UP?
7. “THE RESULT IS A UNIQUE SNOWFLAKE. GOOD FOR A SKI RESORT, BAD FOR A DATA CENTER.” Martin Fowler
8. “A SERVER SHOULD BE LIKE A PHOENIX, REGULARLY RISING FROM THE ASHES.” Martin Fowler
9. PACKING IMAGES • APPLY CONFIG AGAINST BASE IMAGE • BAKE NEW IMAGE OF FINAL STATE • BOOT FROM FULLY OPERATIONAL IMAGE
10. BENEFITS • PLATFORM AGNOSTIC • SAME CONFIG TOOLS • FRESH SERVER ON EVERY DEPLOY • TESTABLE IMAGE • TEST VS. PROD PARITY • SERVER GROUP PARITY • FASTER BOOT
11. “PACKER IS AN OPEN SOURCE TOOL FOR CREATING IDENTICAL MACHINE IMAGES FOR MULTIPLE PLATFORMS FROM A SINGLE SOURCE CONFIGURATION.” Mitchell Hashimoto Creator of packer and vagrant
12. IN SHORT • RUNS ON EVERY MAJOR OS • CREATES IMAGES FOR MULTIPLE PLATFORMS... • ... IN PARALLEL • CHEF, PUPPET, ETC. TO CONFIGURE IMAGE • EXTENDABLE THROUGH PLUGINS • OPEN SOURCE (GO LANG), WELL-MAINTAINED
13. PACKER.JSON Custom BUILDERS MACHINE TO BUILD IMAGE FROM PROVISIONERS CONFIGURE MACHINE Custom PR PENDING Custom POST-PROCESSORS COMPRESS, UPLOAD, ETC.
14. SOURCE: GIT CLONE HTTPS://GITHUB.COM/NDEMOOR/PACKER-IO-DEMO • BUILD AMI IMAGE • PROVISION SOFTWARE • INSTALL AND RUN APPLICATION DEMO APP
15. • DEPLOYMENT UI • BUILT ON TOP OF PACKER • SUPPORTS AWS API • INPUT/OUTPUT API • OPEN SOURCED BY END 2013 WOLFPACK INPUT CI tool git hook ... OUTPUT notification monitoring ... wolfpack PACKER build image PALTFORM API boot SERVER eg. AWS (CF or EC2) configure APPLICATIONS ENVIRONMENTS
17. QUESTIONS? FEEDBACK OR REMARKS? @NDEMOOR
18. • PACKER.IO HTTP://WWW.PACKER.IO/DOCS • MARTIN FOWLER HTTP://MARTINFOWLER.COM/BLIKI/PHOENIXSERVER.HTML HTTP://MARTINFOWLER.COM/BLIKI/IMMUTABLESERVER.HTML HTTP://MARTINFOWLER.COM/BLIKI/SNOWFLAKESERVER.HTML REFERENCES