67 lines
2.0 KiB
Markdown
67 lines
2.0 KiB
Markdown
# | Introduction to docker (2) |
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[TOC]
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## II. Linking containers
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### 1)
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## III. Setting up a development stack
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### 1) Choosing images
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We will setup a simple web dev stack with :
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- nginx (_i.e. nginx:latest_)
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- mariadb (_i.e. mariadb:latest_)
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- php-fpm (_i.e. php:7-fpm_)
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### 2) Volume & network sharing policy
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#### 1. Volume sharing
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###### a) Configuration files
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The **apache** and **php** configuration will be on the host machine (for easy modification) and only mounted on the containers to override the default configuration files. A [virtual](./virtual) folder will hold these configurations with the same path for consistency:
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- the nginx configuration file is located at [virtual/etc/nginx/nginx.conf](./virtual/etc/nginx/nginx.conf).
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- the php-fpm configuration file is located at [virtual/usr/local/etc/php-fpm.d/www.conf](./virtual/usr/local/etc/php-fpm.d/www.conf).
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###### b) Storage files
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MariaDB will have its whole data folder (_i.e. `/var/lib/mysql`_) on the host in the _virtual_ folder to have the data remaining throughout containers. This property makes the database consistent and persistent among container creation/deletion.
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###### c) Log files
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Also logs will be mounted the same way in order for developers to easily check these out when needed (_e.g. `virtual/var/log/apache2/access.log`_). Also, note that even if the container is removed, the logs will remain.
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###### d) Development folder
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The development folder (_i.e. the actual code to test_) is located in the folder [virtual/vhost](./virtual/vhost). In a real-world use of this configuration, I would clone a git repository into it in order for my docker configuration and my actual code not to mix together ; we could then use _git submodules_ for version stability among the 2 repositories.
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#### 2. Network sharing
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The whole system will only expose its port `8080` ; we are not using the default HTTP port not to break a possible web server on the host. Containers between them will be connected through the default overlay network which is unreachable from the host.
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