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245 lines
5.7 KiB
ReStructuredText
245 lines
5.7 KiB
ReStructuredText
*************************
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Change container versions
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*************************
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One of the core concepts of the Devilbox is to easily change between different versions of a
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specific service.
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**Table of Contents**
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.. contents:: :local:
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Implications
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============
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Configuration changes
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---------------------
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Be aware that every version has its own configuration files in the ``cfg/`` directory.
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If you switch to a different version, you might end up with a different custom configuration.
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This however only applies, if you have already customized the configuration for your current
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service.
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.. seealso::
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* :ref:`php_ini`
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* :ref:`php_fpm_conf`
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* :ref:`apache_conf`
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* :ref:`nginx_conf`
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* :ref:`my_cnf`
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Data changes
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------------
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You also have to be aware that all database services (e.g.: MySQL, PostgreSQL, MongoDB, etc) use
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a per version data directory. If you change the database version you might find that you have an
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empty database when starting another version.
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This is simply a pre-caution to prevent newer versions from upgrading the database files and
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accidentally making them incompatible for older versions.
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If you want to take your data along, do a backup before switching the version and then re-import
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after the switch:
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.. seealso::
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* :ref:`backup_and_restore_mysql`
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* :ref:`backup_and_restore_pgsql`
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* :ref:`backup_and_restore_mongo`
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Examples
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========
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Change PHP version
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------------------
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Stop the Devilbox
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^^^^^^^^^^^^^^^^^
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Shut down the Devilbox in case it is still running:
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.. code-block:: bash
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# Navigate to the Devilbox directory
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host> cd path/to/devilbox
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# Stop all container
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host> docker-compose stop
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Edit the ``.env`` file
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^^^^^^^^^^^^^^^^^^^^^^
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Open the ``.env`` file with your favourite editor and navigate to the ``PHP_SERVER`` section.
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It will look something like this:
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.. code-block:: bash
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:caption: .env
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:emphasize-lines: 7
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#PHP_SERVER=5.2
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#PHP_SERVER=5.3
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#PHP_SERVER=5.4
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#PHP_SERVER=5.5
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#PHP_SERVER=5.6
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#PHP_SERVER=7.0
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PHP_SERVER=7.1
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#PHP_SERVER=7.2
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#PHP_SERVER=7.3
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As you can see, all available values are already there, but commented. Only one is uncommented.
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In this example it is ``7.1``, which is the PHP version that will be started, once the Devilbox
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starts.
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To change this, simply uncomment your version of choice and save this file. Do not forget to comment
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(disable) any other version.
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In order to enable PHP 5.5, you would change the ``.env`` file like this:
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.. code-block:: bash
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:caption: .env
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:emphasize-lines: 4
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#PHP_SERVER=5.2
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#PHP_SERVER=5.3
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#PHP_SERVER=5.4
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PHP_SERVER=5.5
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#PHP_SERVER=5.6
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#PHP_SERVER=7.0
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#PHP_SERVER=7.1
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#PHP_SERVER=7.2
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#PHP_SERVER=7.3
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Start the Devilbox
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^^^^^^^^^^^^^^^^^^
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Now save the file and you can start the Devilbox again.
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.. code-block:: bash
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# Navigate to the Devilbox directory
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host> cd path/to/devilbox
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# Stop all container
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host> docker-compose up php httpd bind
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.. seealso:: :ref:`start_the_devilbox`
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Change web server version
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-------------------------
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Stop the Devilbox
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^^^^^^^^^^^^^^^^^
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Shut down the Devilbox in case it is still running:
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.. code-block:: bash
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# Navigate to the Devilbox directory
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host> cd path/to/devilbox
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# Stop all container
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host> docker-compose stop
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Edit the ``.env`` file
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^^^^^^^^^^^^^^^^^^^^^^
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Open the ``.env`` file with your favourite editor and navigate to the ``HTTPD_SERVER`` section.
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It will look something like this:
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.. code-block:: bash
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:caption: .env
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:emphasize-lines: 3
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#HTTPD_SERVER=apache-2.2
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#HTTPD_SERVER=apache-2.4
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HTTPD_SERVER=nginx-stable
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#HTTPD_SERVER=nginx-mainline
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As you can see, all available values are already there, but commented. Only one is uncommented.
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In this example it is ``nginx-stable``, which is the web server version that will be started,
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once the Devilbox starts.
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To change this, simply uncomment your version of choice and save this file. Do not forget to comment
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(disable) any other version.
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In order to enable Apache 2.2, you would change the ``.env`` file like this:
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.. code-block:: bash
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:caption: .env
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:emphasize-lines: 1
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HTTPD_SERVER=apache-2.2
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#HTTPD_SERVER=apache-2.4
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#HTTPD_SERVER=nginx-stable
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#HTTPD_SERVER=nginx-mainline
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Start the Devilbox
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^^^^^^^^^^^^^^^^^^
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Now save the file and you can start the Devilbox again.
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.. code-block:: bash
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# Navigate to the Devilbox directory
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host> cd path/to/devilbox
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# Stop all container
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host> docker-compose up php httpd bind
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.. seealso:: :ref:`start_the_devilbox`
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Change whatever version
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-----------------------
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When you have read how to change the PHP or web server version, it should be fairly simple to
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change any service version. It behaves in the exact same way.
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The variable names of all available services with changable versions are in the following format:
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``<SERVICE>_SERVER``. Just look through the :ref:`env_file`.
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.. seealso::
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The following variables control service versions:
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:ref:`env_php_server`, :ref:`env_httpd_server`,
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:ref:`env_mysql_server`, :ref:`env_pgsql_server`, :ref:`env_redis_server`,
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:ref:`env_memcd_server`, :ref:`env_mongo_server`
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Gotchas
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=======
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If two versions are uncommented at the same time, always the last one takes precedence.
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Consider this ``.env`` file:
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.. code-block:: bash
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:caption: .env
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:emphasize-lines: 4,6
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#PHP_SERVER=5.2
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#PHP_SERVER=5.3
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#PHP_SERVER=5.4
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PHP_SERVER=5.5
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#PHP_SERVER=5.6
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PHP_SERVER=7.0
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#PHP_SERVER=7.1
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#PHP_SERVER=7.2
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#PHP_SERVER=7.3
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Both, PHP 5.5 and PHP 7.0 are uncommented, however, when you start the Devilbox, it will use
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PHP 7.0 as this value overwrites any previous ones.
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Checklist
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=========
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1. Stop the Devilbox
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2. Uncomment version of choice in ``.env``
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3. Start the Devilbox
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.. seealso:: :ref:`troubleshooting`
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