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Docker Docker Docker Chef
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someara
February 02, 2016
Technology
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450
Docker Docker Docker Chef
Configuration Management Camp
Ghent Belgium
February 2016
someara
February 02, 2016
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Transcript
Docker Docker Docker Chef
Config Management Camp Ghent, Belgium February 2016
Sean OMeara
[email protected]
@someara
whoami
Part 1
Remember the time
Remember that time we didn’t need configuration management because we
had packaging?
Remember that time the cloud came out and we didn’t
need sysadmins?
Remember that time when we didn’t need schemas because we
had MongoDB?
Repeat after me
CONFIGURATION MANAGEMENT AND IMMUTABLE INFRASTRUCTURE ARE NOT MUTUALLY EXCLUSIVE
Say it again
CONFIGURATION MANAGEMENT AND IMMUTABLE INFRASTRUCTURE ARE NOT MUTUALLY EXCLUSIVE
We good?
The Docker cookbook
Configuration Management is not restricted to files, directories, packages and
services
Configuration Management tests and repairs any programmable noun
Images are nouns
Containers are nouns
hello world
https://flic.kr/p/br26Cb Setup v0.0.1
Install ChefDK
git clone https:// github.com/someara/chef- docker-tutorial
kitchen test
git checkout v0.0.1 git checkout v0.1.0 git checkout v0.1.1 git
checkout v0.2.0 git checkout v0.2.1 git checkout v0.3.0 git checkout v0.3.1
https://flic.kr/p/s684tk Feature v0.1.0
metadata.rb
.kitchen.yml
recipes/hello.rb
kitchen converge hello kitchen login hello docker images docker ps
-a docker logs hello-world
git add . git commit -a -m “v0.1.0 - hello”
git tag v0.1.0
https://flic.kr/p/53stX2 Patch v0.1.1
Bug report: “hello is not idempotent”
kitchen converge hello kitchen converge hello
kitchen login hello docker ps -a docker logs hello-world
hello-world exits after every run
This is expected!
http://gliderlabs.com/
recipes/hello.rb
rubocop \ && rspec \ && kitchen test hello
metadata.rb
git add . git commit -a -m “v0.1.1 - hello”
git tag v0.1.1
an echo server https://flic.kr/p/6WtX6X
https://flic.kr/p/s684tk Feature v0.2.0
Recipe work Kitchen work Behavior testing Unit Final Acceptance Commit
.kitchen.yml
recipes/echo.rb
Docker Containers have 40+ (and growing) runtime API options
None
kitchen converge echo kitchen converge echo kitchen login echo docker
images docker ps -a docker logs an_echo_server docker inspect an_echo_server echo "hi" | nc localhost 7
test/integration/echo/inspec/run_spec.rb
rubocop \ && rspec \ && kitchen test echo
metadata.rb
git add . git commit -a -m “v0.2.0 - echo”
git tag v0.2.0
https://flic.kr/p/dRGr3t Patch v0.2.1
Security team recommends a change… Service should listen on explicitly
defined interfaces
kitchen converge echo kitchen login echo netstat -anp
Listening on :::7 Let’s fix that.
recipes/echo.rb
test/integration/echo/inspec/run_spec.rb
rubocop \ && rspec \ && kitchen test echo
metadata.rb
git add . git commit -a -m “v0.2.1 - echo
patch” git tag v0.2.1
https://flic.kr/p/ayDujN notifications and subscriptions
https://flic.kr/p/cNdyo Feature v0.3.0
recipes/web.rb
recipes/web.rb
kitchen converge web kitchen converge web kitchen login web docker
images docker ps -a curl localhost docker logs bob
test/integration/web/inspec/run_spec.rb
rubocop \ && rspec \ && kitchen test web
metadata.rb
git add . git commit -a -m “v0.3.0 - web”
git tag v0.3.0
https://flic.kr/p/o9c2G3 Patch v0.3.1
Marketing team recommends a change… Bob wasn’t there.
kitchen converge web kitchen login web curl localhost
Bob was here. Let’s fix that.
recipes/web.rb
test/integration/echo/inspec/run_spec.rb
rubocop \ && rspec \ && kitchen test web
metadata.rb
git add . git commit -a -m “v0.3.1 - echo
patch” git tag v0.3.1
Part 2
kitchen-dokken http://on.mtv.com/1ls5SRc
Experimental status Soon to be renamed something less clever
Removes bootstrap overhead Uses Docker volumes Chef not baked into
images Works on Travis
https://github.com/someara/ kitchen-dokken/
Install ChefDK chef gem install kitchen-dokken
git clone https://github.com/ someara/hello_dokken
kitchen list docker ps -a
None
kitchen create docker ps -a
Chef container Data container Runner container
docker run \ —volumes-from chef \ —volumes-from data \ imagename
\ chef-client
docker diff suitename
https://travis-ci.org/ someara/etcd-cookbook
fin
None