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French Engineers Alumni Network
Make For DockerSingapore #11 - 06/12/2016 @
By Mathieu François
System container
Vs
Application container
Docker 101: The Ubuntu of Containers
Docker 101: Container vs VM
Swarm Architecture
Swarm “Cabinet”
Many Host OS serversScaled on-demand
1 or few Host OS ServersFixed number
Few Docker images Many Docker images
Many containers running per image Scaled on-demand
1 or few containers running per image Fixed number
Massively Scalable Application Optimization of limited resourcesIsolation of team activities and servicesPoor man’s scalability
Containers are “Cattle” Containers are “Pets”
Swarm vs “Cabinet” Architecture
Cabinet Stage 1: Staging vs Live
Cabinet Stage 2: Data & Backup
Cabinet Stage 3: Infrastructure Services
Cabinet Stage 4: Container Templates
“Cabinet” Troubleshooting
● runit http://smarden.org/runit/● “The DJB way”
http://thedjbway.b0llix.net/● DJB site http://cr.yp.to/
The “Unix Way”
vs
Monolithic-Fat-And-Ugly-Enterprise approach (systemd)
Lightweight Multi-Process Containers
Problem: Dockerfiles & Copy/Paste “Inflation”
Imagine a Docker World Where we could...
● Define small pieces of configuration or functionality, then mix them together into production docker images
● "Inherit" from multiple image builds ● Easily manage images that pull files from multiple directories on
our filesystem ● Rebuild an entire stack of images as needed with a single
command
Sounds Like Good Old Fashioned Makefiles
DockerMake
● “Build and manage stacks of docker images - a dependency graph for Dockerfiles”
● https://github.com/avirshup/DockerMake● Without the ugly old-school syntax of GNU Makefiles
DockerMake - DockerMake.yaml
gliderlabs/alpine:3.4
alpine-common:2.0
alpine-runit:2.0
alpine-nginx:2.0
alpine-nginx-vhost:2.0
alpine-common-clean:2.0
nginx-vhost:2.0
requires
requires
requires
requires
requires
FROM
image
official repository
module
DockerMake - No Arguments
Displays all the available targets
DockerMake - Build 1 Target
DockerMake - Images
Intermediate build steps also generate images in order to optimize the Docker layers
They didn’t use DockerMake!
Images I shamelessly used:
● https://kvaes.wordpress.com/2015/12/30/docker-101-from-an-infrastructure-ops-perspective/● https://blog.docker.com/2015/11/deploy-manage-cluster-docker-swarm/● http://www.jonathancharlesfurniture.com/catalogue/index.php?route=public/product&product_id=192
4● https://blog.abevoelker.com/why-i-dont-use-docker-much-anymore/
Appendix
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