Chef and Docker: Where is the line?

DevOps KC meetup 2016/03/22
https://www.youtube.com/watch?v=9WPw_CqJycE

Transcript

1. Configuration Management and Docker
2. Chef 4 years Docker 6 months Aaron Blythe
4. Work from Home
5. Install Package Trinity of Config Management Manage Service Config Files
6. Trinity
7. Trinity
9. Install Package Trinity of Config Management Manage Service Config Files
10. package ‘httpd' do action :install end Trinity of Config Management (Chef) service "httpd" do action :start end template 'httpd.conf' do action :create source 'httpd.conf.erb' owner 'root' group ‘root’ mode '0644' notifies :reload, 'service[httpd]', :delayed end
11. package ‘httpd' do action :install end template 'httpd.conf' do action :create source 'httpd.conf.erb' owner 'root' group ‘root’ mode '0644' notifies :reload, 'service[httpd]', :delayed end service "httpd" do action :start end Chef Recipe
13. Install Package Trinity of Config Management Manage Service Config Files
14. RUN yum -y update && yum clean all RUN yum -y install httpd && yum clean all Trinity of Config Management (Docker) CMD ["/run-httpd.sh"] RUN sed -i 's@#Include conf/extra/httpd-ssl.conf@Include conf/extra/httpd-ssl.conf@' /usr/local/apac RUN sed -i 's@#LoadModule ssl_module modules/mod_ssl.so@LoadModule ssl_module modules/mo RUN sed -i 's@#LoadModule socache_shmcb_module modules/mod_socache_shmcb.so@LoadMod Shell out
15. RUN yum -y update && yum clean all RUN yum -y install httpd && yum clean all Trinity of Config Management (Docker) CMD ["/run-httpd.sh"] COPY ./httpd.conf /etc/httpd/conf/httpd.conf
16. RUN yum -y update && yum clean all RUN yum -y install httpd && yum clean all Trinity of Config Management (Docker) CMD ["/run-httpd.sh"] VOLUME [“/etc/httpd/conf/httpd.conf“]
17. RUN yum -y update && yum clean all RUN yum -y install httpd && yum clean all VOLUME [“/etc/httpd/conf/httpd.conf“] CMD ["/run-httpd.sh"] Dockerfile
18. What I like about Docker • Speed (after the initial download) • Sharing of resources • “Don’t think of Container as Mini-VM” Chase
19. Concerns • File system size https://imagelayers.io/
20. Concerns • Is the volume mounting to manage configs tenable? • Cutting myself off from Chef community cookbooks. • When/How should I shoot for immutable server? • How should I be re-writing my apps for: • Service discovery? • Hiding but still using secrets?
21. Demo • https://hub.docker.com/ • https://github.com/hearstat • https://github.com/chef-cookbooks/docker