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scripts: rework environment variables setup (#2716)

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* outsourcing env variable setup

This commit contains major parts of the work of refactoring the setup
and usage of environment variables. It outsources the setup into its own
script and provides dedicated functions to be executed at a later point in time.

A **new** env variable was added: `USER_PROVISIONG` which provides a
better way of defining which method / protocol to use when it comes to
setting up users. This way, the `ENABLE_LDAP` variable is deprecated,
but all of this is backwards compatible due to a "compatibility layer", a function provided by the new variables script.

This is not a breaking change. It mostly refators internal scripts. The
only change facing the user-side is the deprecation of `ENABLE_LDAP`. We
can prolong the period of deprecation for this variable as long as we
want, because the new function that ensures backwards compatibility
provides a clean interface for the future.

Co-authored-by: Brennan Kinney <5098581+polarathene@users.noreply.github.com>
Co-authored-by: Casper <casperklein@users.noreply.github.com>
This commit is contained in:
Georg Lauterbach 2022-08-22 08:31:32 +02:00 • committed by GitHub
parent 26053c22bd
commit ab55343d8e
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13 changed files with 302 additions and 185 deletions
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mailserver.env
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@ -34,6 +34,12 @@ SUPERVISOR_LOGLEVEL=
# 1 => consolidate all states into a single directory (`/var/mail-state`) to allow persistence using docker volumes
ONE_DIR=1
# **empty** => use FILE
# LDAP => use LDAP authentication
# OIDC => use OIDC authentication (not yet implemented)
# FILE => use local files (this is used as the default)
ACCOUNT_PROVISIONER=
# empty => postmaster@domain.com
# => Specify the postmaster address
POSTMASTER_ADDRESS=
@ -324,6 +330,7 @@ FETCHMAIL_POLL=300
# A second container for the ldap service is necessary (i.e. https://github.com/osixia/docker-openldap)
# For preparing the ldap server to use in combination with this container this article may be helpful: http://acidx.net/wordpress/2014/06/installing-a-mailserver-with-postfix-dovecot-sasl-ldap-roundcube/
# with the :edge tag, use ACCOUNT_PROVISIONER=LDAP
# empty => LDAP authentification is disabled
# 1 => LDAP authentification is enabled
ENABLE_LDAP=