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go-chasquid-smtp/docker/entrypoint.sh
Alberto Bertogli b4c429a335 docker: Update Dovecot config to 2.4
Debian 13, the new stable version, updated Dovecot from 2.3 to 2.4.
Unfortunately, the new Dovecot version introduced several changes to the
configuration file that are not backwards-compatible.

https://doc.dovecot.org/2.4.2/installation/upgrade/2.3-to-2.4.html

This patch updates our docker's Dovecot config to the new version.

Thanks to Ernesto Alfonso (erjoalgo@github) for reporting this problem
in https://github.com/albertito/chasquid/issues/80.
2026-02-01 13:34:15 +00:00

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#!/bin/bash
#
# Script that is used as a Docker entrypoint.
#
set -e
if ! grep -q data /proc/mounts; then
echo "/data is not mounted."
echo "Check that the /data volume is set up correctly."
exit 1
fi
# Create the directory structure if it's not there.
# Some of these directories are symlink targets, see the Dockerfile.
mkdir -p /data/chasquid
mkdir -p /data/letsencrypt
mkdir -p /data/chasquid
mkdir -p /data/chasquid/domains
mkdir -p /data/dovecot
# Set up the certificates for the requested domains.
if [ "$AUTO_CERTS" != "" ]; then
# If we were given an email to use for letsencrypt, use it. Otherwise
# continue without one.
MAIL_OPTS="--register-unsafely-without-email"
if [ "$CERTS_MAIL" != "" ]; then
MAIL_OPTS="-m $CERTS_MAIL"
fi
for DOMAIN in $AUTO_CERTS; do
# If it has never been set up, then do so.
if ! [ -e "/etc/letsencrypt/live/$DOMAIN/fullchain.pem" ]; then
# shellcheck disable=SC2086
certbot certonly \
--non-interactive \
--standalone \
--agree-tos \
$MAIL_OPTS \
-d "$DOMAIN"
else
echo "$DOMAIN certificate already set up."
fi
done
# Renew on startup, since the container won't have cron facilities.
# Note this requires you to restart every week or so, to make sure
# your certificate does not expire.
certbot renew
# Give chasquid access to the certificates.
# Dovecot does not need this as it reads them as root.
setfacl -R -m u:chasquid:rX /etc/letsencrypt/{live,archive}
fi
CERT_DOMAINS=""
for i in /etc/letsencrypt/live/*; do
D="${i##*/}" # Extract the last component of the path.
if [ -e "/etc/letsencrypt/live/$D/fullchain.pem" ]; then
CERT_DOMAINS="$CERT_DOMAINS $D"
fi
done
# We need one domain to use as a default - pick the last one.
ONE_DOMAIN=$D
# Check that there's at least once certificate at this point.
# Use $SKIP_CERT_CHECK=1 to bypass this check for debugging purposes.
if [ "$CERT_DOMAINS" == "" ] && [ "$SKIP_CERT_CHECK" != "1" ]; then
echo "No certificates found."
echo
echo "Set AUTO_CERTS='example.com' to automatically get one."
exit 1
fi
# Give chasquid access to the data directory.
mkdir -p /data/chasquid/data
chown -R chasquid /data/chasquid/
# Give dovecot access to the mailbox home.
mkdir -p /data/mail/
chown dovecot:dovecot /data/mail/
# Generate the dovecot ssl configuration based on all the certificates we have.
# The default goes first because dovecot complains otherwise.
echo "# Autogenerated by entrypoint.sh" > /etc/dovecot/auto-ssl.conf
cat >> /etc/dovecot/auto-ssl.conf <<EOF
ssl_server_cert_file = /etc/letsencrypt/live/$ONE_DOMAIN/fullchain.pem
ssl_server_key_file = /etc/letsencrypt/live/$ONE_DOMAIN/privkey.pem
EOF
for DOMAIN in $CERT_DOMAINS; do
echo "local_name $DOMAIN {"
echo " ssl_server_cert_file = /etc/letsencrypt/live/$DOMAIN/fullchain.pem"
echo " ssl_server_key_file = /etc/letsencrypt/live/$DOMAIN/privkey.pem"
echo "}"
done >> /etc/dovecot/auto-ssl.conf
# Pick the default domain as default hostname for chasquid. This is only used
# in plain text sessions and on very rare cases, and it's mostly for aesthetic
# purposes.
# Since the list of domains could have changed since the last run, always
# remove and re-add the setting for consistency.
sed -i '/^hostname:/d' /etc/chasquid/chasquid.conf
echo "hostname: '$ONE_DOMAIN'" >> /etc/chasquid/chasquid.conf
# Start the services (dovecot and chasquid, configured in supervisord.conf).
# We exec, so supervisord becomes our init, and it forwards any signals we
# receive from outside the container.
exec supervisord --nodaemon -c /etc/supervisor/supervisord.conf