kba-team / dockertools
Scripts to remove and add all running docker containers in your /etc/hosts file.
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Language:Shell
Type:tools
README
docker-compose is a very useful tool, especially if you're programming inside a network of docker-containers. Accessing the (TCP) services of these docker containers, however is not so easy. To the best of my knowledge there are currently no tools available, that will add the IPs and hostnames of your running network to your hosts /etc/hosts
file- until now.
Why not use <insert DNS/discovery service here>?
Running a DNS service for docker containers always messes with the DNS settings of your workstation. Especially if these DNS/discovery services themselves run inside docker containers on an active development workstation. Resolving DNS issues is not an easy task. Contrary to that the /etc/hosts
file is simple. It couldn't care less if your workstation switches domains, DNS services, VPNs, etc. on-the-fly. In case something goes wrong, you can always edit the file manually. It was made for adding the hosts of a docker network (joke). I like the /etc/hosts
file (not a joke).
Add to your PHP project
composer require kba-team/dockertools --dev
Add entries to hosts
In a bridged docker network, remove and add the IP addresses and hostnames of containers created by docker-compose
in the /etc/hosts
file. This will save you the hassle of port-forwarding, name resolvers, etc.
The script first removes all existing entries of all the hostnames of containers created by docker-compose
in the /etc/hosts
file and then adds them. This ensures, that there a no duplicate entries in the /etc/hosts
file.
It is implied, that this script can only be called while docker containers are running.
Usage: docker_hosts.sh [-h] [-f <hosts-file>] [-r]
-h
Display usage information.-f <hosts-file>
Use a different hosts file than/etc/hosts
.-r
Only remove all the hostnames of containers created bydocker-compose
, but do not add them.
Examples:
vendor/bin/docker_hosts.sh
: Remove and then add all docker containers in the/etc/hosts
file.vendor/bin/docker_hosts.sh -r
: Just remove all docker containers from the/etc/hosts
file.
Environment variables
DOCKER_REGISTRY
Instead of usingbusybox:latest
to manipulate the hosts file,${DOCKER_REGISTRY}/busybox
will be used. This is useful, in case you manually cache docker images in a local registry for faster access.
Automate docker-compose
In order to automate commands that need execution after docker-compose did its work, use bin/docker.sh
.
Usage: vendor/bin/docker.sh <command>
Available commands are:
add-hosts
Add container hostnames and IPs to hosts file.remove-hosts
Remove container hostnames and IPs from hosts file.exec
Execute command(s) in docker container as${DEFAULT_EXEC_USER:-www-data:www-data}
. Available options:-u
|--user
Run commands using user ID$(id -u)
and group ID$(id -g)
.-c
|--container <name>
Run commands in the specified container. Default container:${DEFAULT_CONTAINER:-web}
migrate
Run the migrations command${MIGRATE_COMMAND}
inside the default container${DEFAULT_CONTAINER:-web}
.seed
Run the seed command${MIGRATE_COMMAND}
inside the default container${DEFAULT_CONTAINER:-web}
.start
Try to pull the current versions of the images, start the containers and add hostnames and IPs to the hosts file.up
Run start, migrate and seed commands.stop
Remove container hostnames and IPs from hosts file and stop the docker containers without destroying them.down
Remove container hostnames and IPs from hosts file and destroy the docker containers.restart
Run down and up commands.cleanup
Delete files owned by${DEFAULT_EXEC_USER}
. Available options:--root
Delete files owned byroot
.
behat
Run behat tests. Any additional parameters will be added to the behat command.phpunit
Run phpunit tests. Any additional parameters will be added to the phpunit command.help
Show help.
Environment variables
Configure the environment variables in your .env
file. That way it can be used by docker-compose as well (DRY).
DEFAULT_EXEC_USER
The default user executing commands inside docker containers.DEFAULT_CONTAINER
The default container to execute commands in.MIGRATE_COMMAND
The command running the migrations to set up the DB structure. In case this variable is not defined, nothing happens.SEED_COMMAND
The command adding seed data to your empty DB. In case this variable is not defined, nothing happens.PHPUNIT_BIN
The path to the PHPunit binary. In case this variable is not defined, nothing happens.BEHAT_BIN
The path to the Behat binary. In case this variable is not defined, nothing happens.