From 1fc40bf93220e1c1b66343b1ea254d49585b59df Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20S=C3=A4nger?= <thomas@gecko.space>
Date: Tue, 16 Oct 2018 22:57:25 +0200
Subject: [PATCH] add healthcheck for postfix

---
 core/postfix/Dockerfile | 3 +++
 core/postfix/health.sh  | 8 ++++++++
 2 files changed, 11 insertions(+)
 create mode 100755 core/postfix/health.sh

diff --git a/core/postfix/Dockerfile b/core/postfix/Dockerfile
index ea58ce1d..4208714a 100644
--- a/core/postfix/Dockerfile
+++ b/core/postfix/Dockerfile
@@ -7,8 +7,11 @@ RUN apk add --no-cache postfix postfix-pcre rsyslog \
 
 COPY conf /conf
 COPY start.py /start.py
+COPY health.sh /health.sh
 
 EXPOSE 25/tcp 10025/tcp
 VOLUME ["/data"]
 
 CMD /start.py
+
+HEALTHCHECK CMD /health.sh
diff --git a/core/postfix/health.sh b/core/postfix/health.sh
new file mode 100755
index 00000000..192eac25
--- /dev/null
+++ b/core/postfix/health.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+if [ "$(echo QUIT|nc localhost 25|tail -n1|cut -f1 -d ' ')" = "221" ]; then
+	echo "ping successful"
+else
+	echo "ping failed"
+	exit 1
+fi