first commit

Dockerfile

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+FROM alpine:3.8
+MAINTAINER Andrey Arapov <andrey.arapov@nixaid.com>
+
+RUN apk update && \
+    apk upgrade && \
+    apk add dovecot runit socklog && \
+    rm -rf /etc/service
+
+COPY service /etc/service/
+# RUN find /etc/service -xdev -type f -name "run" -exec chmod +x '{}' \;
+ENTRYPOINT runsvdir -P /etc/service

service/dovecot/finish

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+#!/bin/sh
+
+echo "${PWD##*/}: Exitted with $1 (signal: $2)"
+[ $1 -ne 0 ] && ( echo "${PWD##*/}: rc != 0, sleeping for 5 seconds ..."; sleep 5 )

service/dovecot/run

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+#!/bin/sh
+exec 2>&1
+
+echo "${PWD##*/}: started."
+
+set -x
+chown -Rh dovecot:dovecot -- /etc/dovecot
+exec /usr/sbin/dovecot -F

service/logger/finish

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+#!/bin/sh
+
+echo "${PWD##*/}: Exitted with $1 (signal: $2)"
+[ $1 -ne 0 ] && ( echo "${PWD##*/}: rc != 0, sleeping for 5 seconds ..."; sleep 5 )

service/logger/run

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+#!/bin/sh
+# Collect all logs which come to /dev/log
+exec 2>&1
+
+echo "${PWD##*/}: started."
+
+set -x
+exec chpst -Unobody socklog unix /dev/log
+# exec socklog unix /dev/log
+# exec socat UNIX-LISTEN:/dev/log,reuseaddr,fork -

start.sh

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+#!/bin/bash
+
+IMAGE=dovecot
+
+docker build -t $IMAGE .
+docker rm -f $IMAGE
+docker run -d \
+  -h $(hostname -f) \
+  --name $IMAGE \
+  -v /etc/localtime:/etc/localtime:ro \
+  $IMAGE