Automating Docker Containers with Puppet

Automating Docker Containers with Puppet, 2014-10-13.

Transcript

1. Automating Docker Containers with Puppet Kylo Ginsberg kylo@puppetlabs.com @kylog irc: kylo
2. Puppet?
3. So you can write: package { ‘ntp’:! ensure => installed,! }! file { ‘/etc/ntp.conf’:! ensure => file,! source => ‘/root/example/ntp.conf’,! mode => ‘0444’,! }! service { ‘ntp’:! ensure => running,! }
4. Forge
5. Instead write include ‘::ntp' or customize: class { '::ntp':! servers => [ 'ntp1.corp.com', 'ntp2.corp.com' ],! }
6. Puppet System Configuration Declarative Language Resource Abstraction
7. Two ways to run code: puppet apply puppet agent
8. Docker and Puppet 1. Building containers! 2. Running containers! 3. Running inside containers
9. Building: puppet apply FROM ubuntu:14.04 ! RUN apt-get -y update RUN apt-get -y install ruby RUN gem install puppet RUN puppet module install puppetlabs/ntp RUN puppet apply -e 'include "::ntp"'
10. Building: puppet agent FROM ubuntu:14.04 ! RUN apt-get -y update RUN apt-get -y install ruby RUN gem install puppet RUN puppet agent -t —server my_host
11. Building: puppet apply FROM jamtur01/puppetbase MAINTAINER James Turnbull "james@lovedthanlost.net" ! RUN apt-get -y -q install wget git-core ADD Puppetfile / RUN librarian-puppet install RUN puppet apply --modulepath=/modules -e "class { 'nginx': }" RUN echo "daemon off;" >> /etc/nginx/nginx.conf EXPOSE 80 CMD ["nginx"]
12. System?
13. Running docker with puppet docker::run { 'helloworld': image => 'ubuntu:precise', command => '/bin/sh -c "while true; do echo hello world; sleep 1; done"', }
14. Puppet Agent on a Container?
15. Container == VM ?
16. Puppet Agent on a Container? Only if you’re treating it as a VM
17. Container == PID? No syslogd, no sshd, no puppet agent
18. Container == PID?
19. Bye
20. Idempotence The state looked like this I ran the function again The state looked like this