Initial commit

Dockerfile

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+FROM alpine:3.13
+
+RUN apk update && \
+    apk add bash gawk cyrus-sasl cyrus-sasl-login cyrus-sasl-crammd5 mailx \
+    postfix postfix-pgsql && \
+    rm -rf /var/cache/apk/* && \
+    mkdir -p /var/log/supervisor/ /var/run/supervisor/ && \
+    touch /etc/postfix/pgsql-relay-domains.cf && \
+    touch /etc/postfix/pgsql-transport-maps.cf && \
+    echo 'maillog_file = /dev/stdout' >> /etc/postfix/main.cf && \
+    sed -i -e 's/inet_interfaces = localhost/inet_interfaces = all/g' /etc/postfix/main.cf
+
+RUN mkdir /config
+
+COPY run.sh /
+RUN chmod +x /run.sh
+RUN newaliases
+
+EXPOSE 25
+#ENTRYPOINT ["/run.sh"]
+CMD ["/run.sh"]

run.sh

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+#!/bin/bash
+
+[ "${DEBUG}" == "yes" ] && set -x
+
+function add_config_value() {
+  local key=${1}
+  local value=${2}
+  # local config_file=${3:-/etc/postfix/main.cf}
+  [ "${key}" == "" ] && echo "ERROR: No key set !!" && exit 1
+  [ "${value}" == "" ] && echo "ERROR: No value set !!" && exit 1
+
+  echo "Setting configuration option ${key} with value: ${value}"
+ postconf -e "${key} = ${value}"
+}
+
+#Copy files into config dir
+
+#Move missing files from Postfix to /config
+mv -n /etc/postfix/main.cf /config/main.cf
+mv -n /etc/postfix/master.cf /config/master.cf
+mv -n /etc/postfix/pgsql-relay-domains.cf /config/pgsql-relay-domains.cf
+mv -n /etc/postfix/pgsql-transport-maps.cf /config/pgsql-transport-maps.cf
+
+#Delete files from Postfix
+rm /etc/postfix/main.cf
+rm /etc/postfix/master.cf
+rm /etc/postfix/pgsql-relay-domains.cf
+rm /etc/postfix/pgsql-transport-maps.cf
+
+#Link files into Postfix
+ln -s /config/main.cf /etc/postfix/main.cf
+ln -s /config/pgsql-relay-domains.cf /etc/postfix/pgsql-relay-domains.cf
+ln -s /config/pgsql-transport-maps.cf /etc/postfix/pgsql-transport-maps.cf
+ln -s /config/master.cf /etc/postfix/master.cf
+
+#Start services
+
+# If host mounting /var/spool/postfix, we need to delete old pid file before
+# starting services
+rm -f /var/spool/postfix/pid/master.pid
+
+exec /usr/sbin/postfix -c /etc/postfix start-fg