Editing Introduction to a Self Managed Life: a 13 hour & 28 minute presentation by FUTO software (section)

==== docker program that DOES use docker volumes ====

Check out mailcow. This is not the full <code>docker-compose.yml</code> configuration file, just a part of it. Look at lines 25-28. For the container <code>mysql-mailcow</code>, we have two docker volumes. The docker volume <code>mysql-vol-1</code> will show up inside the <code>mysql-mailcow</code> container'' (which is a tiny virtual computer that runs our programs, in this case, the mysql database. mysql databases usually contain data on users, configurations, product orders, etc)''. Whatever is in the <code>mysql-vol-1</code> docker volume will show up inside the <code>mysql-mailcow</code> container at <code>/var/lib/mysql</code>.

It is using a docker volume instead of the main computer/operating system’s file system to store its files.

However, on line 28, we have <code>- ./data/conf/mysql/:/etc/mysql/conf.d/:ro,Z</code> which means that whatever is in the subfolder of our mailcow folder''(where the <code>docker-compose.yml</code> file is that we used to install mailcow)'' under <code>data/conf/mysql/</code> will show up inside the docker container at <code>/etc/mysql/conf.d/</code>

<pre>services:

    unbound-mailcow:
      image: mailcow/unbound:1.23
      environment:
        - TZ=${TZ}
        - SKIP_UNBOUND_HEALTHCHECK=${SKIP_UNBOUND_HEALTHCHECK:-n}
      volumes:
        - ./data/hooks/unbound:/hooks:Z
        - ./data/conf/unbound/unbound.conf:/etc/unbound/unbound.conf:ro,Z
      restart: always
      tty: true
      networks:
        mailcow-network:
          ipv4_address: ${IPV4_NETWORK:-172.22.1}.254
          aliases:
            - unbound

    mysql-mailcow:
      image: mariadb:10.5
      depends_on:
        - unbound-mailcow
        - netfilter-mailcow
      stop_grace_period: 45s
      volumes:
        - mysql-vol-1:/var/lib/mysql/
        - mysql-socket-vol-1:/var/run/mysqld/
        - ./data/conf/mysql/:/etc/mysql/conf.d/:ro,Z
      environment:
        - TZ=${TZ}
        - MYSQL_ROOT_PASSWORD=${DBROOT}
        - MYSQL_DATABASE=${DBNAME}
        - MYSQL_USER=${DBUSER}
        - MYSQL_PASSWORD=${DBPASS}
        - MYSQL_INITDB_SKIP_TZINFO=1
      restart: always
      ports:
        - &quot;${SQL_PORT:-127.0.0.1:13306}:3306&quot;
      networks:
        mailcow-network:
          aliases:
            - mysql</pre>
<span id="mailcow-docker-volume-descriptions"></span>
===== mailcow docker volume descriptions =====

Here are some docker volumes used for mailcow:

<pre>louis@mailserver:/opt/mailcow-dockerized$ docker volume ls
DRIVER    VOLUME NAME
local     mailcowdockerized_clamd-db-vol-1
local     mailcowdockerized_crypt-vol-1
local     mailcowdockerized_mysql-socket-vol-1
local     mailcowdockerized_mysql-vol-1
local     mailcowdockerized_postfix-vol-1
local     mailcowdockerized_redis-vol-1
local     mailcowdockerized_rspamd-vol-1
local     mailcowdockerized_sogo-userdata-backup-vol-1
local     mailcowdockerized_sogo-web-vol-1
local     mailcowdockerized_solr-vol-1
local     mailcowdockerized_vmail-index-vol-1
local     mailcowdockerized_vmail-vol-1
</pre>
<span id="main-data-storage"></span>
====== main data storage ======

* <code>vmail-vol-1</code>: The emails &amp; attachment files
* <code>mysql-vol-1</code>: Database stuff like user accounts/settings
* <code>redis-vol-1</code>: Temporary data for faster load times

<span id="email-processing"></span>
====== email processing ======

* <code>postfix-vol-1</code>: Mail server configuration &amp; logs
* <code>rspamd-vol-1</code>: spam filter rules &amp; training data
* <code>clamd-db-vol-1</code>: Virus scanning database

<span id="webmail-user-data"></span>
====== webmail &amp; user data ======

* <code>sogo-userdata-backup-vol-1</code>: Backups of user settings &amp; data
* <code>sogo-web-vol-1</code>: Web interface files
* <code>vmail-index-vol-1</code>: Helps search through old email quickly

<span id="random-technical-volumes"></span>
====== random technical volumes ======

* <code>crypt-vol-1</code>: Encryption-related data
* <code>mysql-socket-vol-1</code>: This assists database communication
* <code>solr-vol-1</code>: Search engine data

<span id="this-seems-like-a-lot"></span>