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Adam Kentosh - 12-factor assessment
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DevOpsDays Ohio
November 19, 2015
Technology
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260
Adam Kentosh - 12-factor assessment
DevOpsDays Ohio
November 19, 2015
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Transcript
CLOUD IS ABOUT HOW COMPUTING IS DONE, NOT WHERE Pivotal
TWELVE-FACTOR APP ASSESSMENT
TWELVE-FACTOR APP ASSESSMENT CLOUD-NATIVE APPLICATION ASSESSMENT ▸ Based on twelve-factor
app methodology ▸ Answers questions around what to migrate
TWELVE-FACTOR APP ASSESSMENT TWELVE-FACTOR APP ▸ Methodology for building cloud-native
web apps
TWELVE-FACTOR APP ASSESSMENT SCORING ▸ Evaluate an app against each
of the twelve-factors ▸ Assign a score of 0-1 for each
TWELVE-FACTOR APP ASSESSMENT I. CODEBASE ▸ Version controlled, one-to-one correlation
Example: Multiple codebases is a distributed system, not an app score = .6
TWELVE-FACTOR APP ASSESSMENT II. DEPENDENCIES ▸ Explicitly declare and isolate
dependencies EXAMPLE: Pip + wget for external dependency score = .7
TWELVE-FACTOR APP ASSESSMENT III. CONFIG ▸ Store config in the
environment EXAMPLE: Using java system properties score = .5
TWELVE-FACTOR APP ASSESSMENT IV. BACKING SERVICES ▸ Treat backing services
as attached resources EXAMPLE: Accessing local file system score = .4
TWELVE-FACTOR APP ASSESSMENT V. BUILD, RELEASE, RUN ▸ Strict separation
between build, release, and run EXAMPLE: Build rpm, run with startup script score = .8
TWELVE-FACTOR APP ASSESSMENT VI. PROCESSES ▸ Processes are stateless and
share nothing. EXAMPLE: Sticky sessions score = 0
TWELVE-FACTOR APP ASSESSMENT VII. PORT BINDING ▸ Export services via
port binding EXAMPLE: local MTA instead of a smarthost score = .2
TWELVE-FACTOR APP ASSESSMENT VIII. CONCURRENCY ▸ Scale out via the
process model EXAMPLE: JVM with large block of system resources score = .3
TWELVE-FACTOR APP ASSESSMENT IX. DISPOSABILITY ▸ The entire process is
disposable EXAMPLE: Web processes stop listening score = 1
TWELVE-FACTOR APP ASSESSMENT X. DEV/PROD PARITY ▸ All environments are
as similar as possible. EXAMPLE: Using Redis and MySQL but deploy oracle in prod score = .7
TWELVE-FACTOR APP ASSESSMENT XI. LOGS ▸ Treat logs as event
streams Logging to local file but using Splunk score = .4
TWELVE-FACTOR APP ASSESSMENT XII. ADMIN PROCESSES ▸ Run admin/management tasks
as one-off processes EXAMPLE: SSH to create Tomcat symlink score = .2
TWELVE-FACTOR APP ASSESSMENT SCORING Sum Sum of Squares 0.6 0.6
0.7 0.7 0.5 0.5 0.4 0.4 0.8 0.8 0 0 0.2 0.2 0.3 0.3 1 1 0.7 0.7 0.4 0.4 0.2 0.2 5.8 3.72
TWELVE-FACTOR APP ASSESSMENT SCORING ▸ Sum of squares
TWELVE-FACTOR APP ASSESSMENT BUSINESS OBJECTIVES ▸ Can take business objectives
into consideration.
TWELVE-FACTOR APP ASSESSMENT GAP ANALYSIS ▸ Identify quick wins and
long polls
TWELVE-FACTOR APP ASSESSMENT CONTACT INFORMATION ▸ Adam Kentosh ▸
[email protected]