Yii2 framework backup
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Yii and Docker
==============
For development and deployments Yii applications can be run as Docker containers. A container is like a lightweight isolated virtual machine that maps its services to host's ports, i.e. a webserver in a container on port 80 is available on port 8888 on your (local)host.
Containers can solve many issues such as having identical software versions at developer's computer and the server, fast deployments or simulating mutli-server architecture while developing.
You can read more about Docker containers on [docker.com](https://www.docker.com/what-docker).
## Requirements
- `docker`
- `docker-compose`
Visit the [download page](https://www.docker.com/community-edition) to get the Docker tooling.
## Installation
After installation, you should be able to run `docker ps` and see an output similar to
```
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS
```
This means your Docker daemon is up and running.
Additionally run `docker-compose version`, your output should look like this
```
docker-compose version 1.20.0, build unknown
docker-py version: 3.1.3
CPython version: 3.6.4
OpenSSL version: OpenSSL 1.1.0g 2 Nov 2017
```
With Compose you can configure manage all services required for your application, such as databases and caching.
## Resources
- PHP-base images for Yii can be found at [yii2-docker](https://github.com/yiisoft/yii2-docker)
- Docker support for [yii2-app-basic](https://github.com/yiisoft/yii2-app-basic#install-with-docker)
- Docker support for [yii2-app-advanced](https://github.com/yiisoft/yii2-app-advanced/pull/347) is in development
## Usage
Basic commands for Docker are
docker-compose up -d
to start all services in your stack, in the background
docker-compose ps
to list running services
docker-compose logs -f
to view logs for all services, continuously
docker-compose stop
to stop all services in your stack, gracefully
docker-compose kill
to stop all services in your stack, immediately
docker-compose down -v
to stop and remove all services, **be aware of data loss when not using host-volumes**
To run commands in a container
docker-compose run --rm php composer install
runs composer installation in a new container
docker-compose exec php bash
executes a bash in a *running* `php` service
## Advanced topics
### Yii framework tests
You can run the dockerized framework tests for Yii itself as described [here](https://github.com/yiisoft/yii2/blob/master/tests/README.md#dockerized-testing).
### Database administration tools
When running MySQL as (`mysql`), you can add phpMyAdmin container to your stack like the following:
```
phpmyadmin:
image: phpmyadmin/phpmyadmin
ports:
- '8888:80'
environment:
- PMA_ARBITRARY=1
- PMA_HOST=mysql
depends_on:
- mysql
```