Downloaded 12 times
![class webserver {
package { 'httpd':
ensure => latest
} ->
file { '/etc/httpd/conf.d/local.conf':
ensure => file,
mode => 644,
source => 'puppet:///modules/httpd/local.conf',
} ->
service { 'httpd':
ensure => running,
enable => true,
subscribe => File['/etc/httpd/conf.d/local.conf'],
}
!
}
A basic manifest
10](https://image.slidesharecdn.com/complementingdockerwithpuppet-140613160645-phpapp02-140801195202-phpapp02/85/Complementing-Docker-with-Puppet-10-320.jpg)
![class webserver2 inherits webserver {
File['/etc/httpd/conf.d/local.conf'] {
source => 'puppet:///modules/httpd/other-local.conf',
}
}
Override via inheritance
11](https://image.slidesharecdn.com/complementingdockerwithpuppet-140613160645-phpapp02-140801195202-phpapp02/85/Complementing-Docker-with-Puppet-11-320.jpg)
![!
docker::run { 'appserver2':
image => 'fedora:20',
command => '/usr/sbin/init',
ports => ['80', '443'],
links => ['mysql:db'],
use_name => true,
volumes => ['/var/lib/couchdb', '/var/log'],
volumes_from => 'appserver1',
memory_limit => 10485760, # bytes
username => 'appy',
hostname => 'app2.example.com',
env => ['FOO=BAR', 'FOO2=BAR2'],
dns => ['8.8.8.8', ‘8.8.4.4']
}
Running containers
18](https://image.slidesharecdn.com/complementingdockerwithpuppet-140613160645-phpapp02-140801195202-phpapp02/85/Complementing-Docker-with-Puppet-18-320.jpg)
![Dockerfile for puppet apply
20
FROM jamtur01/puppetbase
MAINTAINER James Turnbull <james@lovedthanlost.net>
ADD modules /tmp/modules
RUN yum -y install puppet;
puppet apply --modulepath=/tmp/modules
-e "class { 'nginx': service_ensure => disable }”
EXPOSE 80
CMD ["nginx"]](https://image.slidesharecdn.com/complementingdockerwithpuppet-140613160645-phpapp02-140801195202-phpapp02/85/Complementing-Docker-with-Puppet-20-320.jpg)
Uploaded byDocker, Inc.
Complementing Docker with Puppet
This document discusses using Puppet to manage Docker containers and container hosts. It describes using Puppet modules to install and configure Docker, pull images, and run containers. It also provides examples of Dockerfiles that can be used to build images that run Puppet apply without a master or use Puppet agent to connect to a master during container startup. Finally, it briefly discusses managing runtime configuration through init systems like systemd.
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Complementing Docker with Puppet
- 1. Beyond Golden Containers ComplementingDocker with Puppet David Lutterkort lutter@puppetlabs.com
- 2.
- 3.
- 4. lang en_US.UTF-8 keyboard us … rootpw--iscrypted $1$uw6MV$m6VtUWPed4SqgoW6fKfTZ/ part / --size 1024 --fstype ext4 --ondisk sda ! repo --name=fedora —mirrorlist=… repo --name=updates —mirrorlist=… ! %packages @core %end ! %post curl http://example.com/the-script.pl | /usr/bin/perl ! What’s that machine doing ? 4
- 5.
- 6.
- 7. Overview • Puppet from 10,000 feet • Managing the host • Building images – without a master (puppet apply) – with a master (puppet agent) • Run9me configura9on 7
- 8. Infrastructure as Code 8 1)DEFINE2)SIMULATE 4)REPORT 3)ENFORCE Re-usable infrastructure-as-code Insight into changes Before deploying changes Automatically and reliably
- 9.
- 10. class webserver { package{ 'httpd': ensure => latest } -> file { '/etc/httpd/conf.d/local.conf': ensure => file, mode => 644, source => 'puppet:///modules/httpd/local.conf', } -> service { 'httpd': ensure => running, enable => true, subscribe => File['/etc/httpd/conf.d/local.conf'], } ! } A basic manifest 10
- 11. class webserver2 inheritswebserver { File['/etc/httpd/conf.d/local.conf'] { source => 'puppet:///modules/httpd/other-local.conf', } } Override via inheritance 11
- 12. The site-wide manifest 12 nodehost1.example.com { class { 'webserver': } } ! node host2.example.com { class { 'webserver2': } } ! node host3.example.com { class {'mongodb::server': port => 27018 } }
- 13.
- 14. Overview • Puppet from 10,000 feet • Managing the host • Building images – without a master (puppet apply) – with a master (puppet agent) • Run9me configura9on 14
- 15. Managing the host Gareth Rushgrove’s module: hKps://forge.puppetlabs.com/garethr/docker ! • Install docker (Ubuntu and CentOS) • Manage images • Run containers 15
- 16. ! class { 'docker': tcp_bind=> 'tcp://127.0.0.1:4243', socket_bind => 'unix:///var/run/docker.sock', } Setting up Docker 16
- 17. ! docker::image { 'ubuntu': image_tag=> 'precise' } Pulling down images 17
- 18. ! docker::run { 'appserver2': image=> 'fedora:20', command => '/usr/sbin/init', ports => ['80', '443'], links => ['mysql:db'], use_name => true, volumes => ['/var/lib/couchdb', '/var/log'], volumes_from => 'appserver1', memory_limit => 10485760, # bytes username => 'appy', hostname => 'app2.example.com', env => ['FOO=BAR', 'FOO2=BAR2'], dns => ['8.8.8.8', ‘8.8.4.4'] } Running containers 18
- 19. Overview • Puppet from 10,000 feet • Managing the host • Building images – without a master (puppet apply) – with a master (puppet agent) • Run9me configura9on 19
- 20. Dockerfile for puppetapply 20 FROM jamtur01/puppetbase MAINTAINER James Turnbull <james@lovedthanlost.net> ADD modules /tmp/modules RUN yum -y install puppet; puppet apply --modulepath=/tmp/modules -e "class { 'nginx': service_ensure => disable }” EXPOSE 80 CMD ["nginx"]
- 21. Overview • Puppet from 10,000 feet • Managing the host • Building images – without a master (puppet apply) – with a master (puppet agent) • Run9me configura9on 21
- 22. ! FROM fedora:20 MAINTAINER DavidLutterkort <lutter@watzmann.net> ADD puppet /tmp/puppet-docker RUN yum -y install puppet; yum clean all; /tmp/puppet-docker/bin/puppet-docker Dockerfile for puppet agent 22
- 23. > tree puppet ! puppet/ ├──bin │ └── puppet-docker ├── config.yaml └── ssl ├── agent-cert.pem ├── agent-private.pem ├── agent-public.pem └── ca.pem ! Support files 23
- 24. > cat puppet/config.yaml ! --- certname:docker # server: puppet-master.example.com facts: container: docker build: true ! Configure agent run 24
- 25. Overview • Puppet from 10,000 feet • Managing the host • Building images – without a master (puppet apply) – with a master (puppet agent) • Run<me configura<on 25
- 26. Runtime configuration • Install an init system (systemd) – run cron or puppetd – run target service(s) • Possibly move to one agent per host 26
- 27. Summary • Explain what you are doing clearly (or scare those trying to understand you to death) • Manage container hosts with hKps://forge.puppetlabs.com/garethr/docker • Sample materials for puppet agent etc. at hKps://github.com/luKer/puppet-‐docker ! 27 Ques9ons ?