BretFisher

Docker Cli Tips and Tricks

• bret@bretfisher.com
• https://twitter.com/BretFisher
• http://bretfisher.com

My favorite command line options and best practices

• Bash/zsh completion
• use Tab to populate command line, narrows down options as you go, fills in container names, ID's, images, volumes. Huge time saver.

BretFisher

# NOT FOR SHELL SCRIPT, but rather just for quick copy paste 
# this is a copy-paste version with defaults of the full shell script docker-xenial.sh which is below this one in gist.

apt-get -y install apt-transport-https ca-certificates curl && \
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - && \
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" && \
service lxcfs stop && apt-get remove -y -q lxc-common lxcfs lxd lxd-client && \
apt-get update -q && \
apt-get install -y -q docker-ce && \
printf '{ "userns-remap" : "default" , "storage-driver" : "overlay2" }' > /etc/docker/daemon.json && \

BretFisher

# problem: when presenting, I want to obscure
# my prompt to act like it's at root of file system 
# and be very basic with no git info, etc.

# solution: this theme lets you set a ENV to the path 
# of your presentation, which will help remove unneeded prompt
# features while in that path 

# oh-my-zsh theme for presenting demos
# based off the default rubbyrussell theme

BretFisher

sudo: required #is required to use docker service in travis

language: php #can be any language, just php for example

services:
  - docker # required, but travis uses older version of docker :(

install:
  - echo "install nothing!" # put your normal pre-testing installs here

BretFisher

1. download these two files to the same directory
2. docker-compose up
3. http://localhost should show you "it works" which is apache being reverse-proxied through nginx
4. docker sets up DNS for web based on compose service name so the nginx front-end can find http://web
5. proxy is set to listen on public port 80 on host so it'll receive incoming traffic, then push to httpd

BretFisher

# Replace the "❯" symbol in the prompt with "🥃"
[character]
success_symbol = "[🥃](bold green)"

[[battery.display]]
threshold = 75 # only show me battery status below 75%

[directory]
truncation_length = 5
truncation_symbol = '…/'

BretFisher

# this assumes your using oh-my-zsh for maximum zsh-ness
# info and defaults are here:
# https://github.com/robbyrussell/oh-my-zsh/blob/master/templates/zshrc.zsh-template

export LC_ALL="en_US.UTF-8"
export ZSH=/Users/bret/.oh-my-zsh

# custom prompt theme
ZSH_THEME="present" # mine is present, default is robbyrussell, also agnoster, fishy, ys, wild-cherry
COMPLETION_WAITING_DOTS="true"

BretFisher

dcb='docker-compose build'
dcdn='docker-compose down'
dce='docker-compose exec'
dcl='docker-compose logs'
dclf='docker-compose logs -f'
dco=docker-compose
dcps='docker-compose ps'
dcr='docker-compose run'
dcrestart='docker-compose restart'
dcrm='docker-compose rm'

BretFisher

version: '3'

# vcap.me is a wildcard domain that resolves to localhost
# in case you need to pass URL's around from browser to 
# containers this could help you get around localhost problem

services:
    # use www.vcap.me to access web containter from host
    # use api.vcap.me to access api container from host
    proxy:

BretFisher

# tmux config for ultimate winning

# make tmux display things in 256 colors
#set -g default-terminal "screen-256color"
# use this if italic enabled in term profile
set -g default-terminal "tmux-256color"
# set just true color without custom term
#set -ga terminal-overrides ",xterm-256color:Tc"
# fixes bug: https://github.com/tmux/tmux/issues/435
#set -ga terminal-overrides ',xterm*:sitm=\E[3m'