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Docker Tools and Terms Cheat Sheet

A Programming › Docker cheat sheet in English by achang
Docker
11,756 views 3,430 downloads 17 Jul 2017 History
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Container Tools

docker ps
lists all currently running containers
docker ps -a
lists all containers (including stopped ones)
docker logs CONTAI­NER(S)
shows the output of the given contai­ner(s)
docker rm CONTAI­NER(S)
removes a contai­ner(s) - including any local data changes
docker rm -f CONTAI­NER(S)
same as docker rm except also force stops a contai­ner(s)
docker start CONTAI­NER(S)
attempts to start a stopped contai­ner(s)
docker stop CONTAI­NER(S)
attempts to stop a running contai­ner(s)
docker restart CONTAI­NER(S)
stops and then starts the specified contai­ner(s)
docker cp SRC DEST
copies files to/from a specific container to a local location
container location format: CONTAI­NER­:PA­TH_­ON_­CON­TAINER
docker exec -it CONTAINER bash
starts a bash terminal session in the CONTAINER specified

Aliases

docker­_build
docker­_co­mpose followed by a docker­_bu­ild_js
docker­_bu­ild_js
builds front-end components using yarn run compile
docker­_co­mpose
installs depend­encies as defined in compos­er.lock - does not update
docker­_start
runs all containers as defined in docker­-co­mpo­se.yml with the default command as defined by the image
dockerize
logs in to aws in order to pull new images
src_sync
copies source code into all running containers and makes sure container source is up to date
docker­_ca­che­_clear
runs CacheC­lea­rCo­mmand in order to remove cached assets
docker­_ca­che­_fo­rce­_clear
rm -rf app/cache
docker­_ru­n_s­ing­le_test TEST_F­ILE­_LO­CATION
runs a single phpUnit test file
cmd
starts a new container using the scriptbox image and starts an intera­ctive bash session

Terms

Image
A snapshot of a lightw­eight filesystem in order to run specific tasks
Container
An instan­tiation of an enviro­nment created from a specific image
Fileca­binet
A file mount that is shared across all containers

Troubl­esh­ooting

docker ps -a
use to see which containers are not starting if linking errors occur
docker logs CONTAINER
use to see specific logs and errors for a container to trouble shoot bad exit codes
src_sync
use if logs reveal that files cannot be found
docker­_bu­ild­/bu­ild­_js­/co­mpose
use if parame­ter­s/d­epe­nde­ncies seem to be incorrect
docker rm CONTAINER
use if a file is corrupt in a container
NOTE: DO NOT REMOVE *_data CONTAINERS AS THEY WILL TAKE A LONG TIME TO DOWNLOAD
docker­_ca­che­_cl­ear­/do­cke­r_c­ach­e_f­orc­e_clear
use if annota­tions or other cached assets seem to be corrup­t/not updating

Docker ps columns

NAMES
Interc­han­geable with CONTAINER ID - used to reference a specific container
CONTAINER ID
Interc­han­geable with NAMES - used to reference a specific container
IMAGE
Image that the container enviro­nment is running on
COMMAND
Command(s) that the container is runs when started
CREATED
Date when container was first created
STATUS
Current status of container - will also display exit codes
PORTS
Displays external -> internal port mapping and protocal

xdebug - docker native

sudo ifconfig lo0 alias 10.254.25­4.254
docker exec -it webserver bash
vi /etc/p­hp.d­/x­deb­ug.ini
press i to be able to edit, arrows to navigate
set xdebug.re­mot­e_c­onn­ect­_back=0
set xdebug.re­mot­e_h­ost­=10.25­4.2­54.254
set xdebug.re­mot­e_a­uto­start=1
to save and quit from vi:
press esc
type :wq
press enter
exit to get out of the container
run docker restart webserver in order to have the new config values take place

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