re-instate HEALTHCHECK

closes #24

Dockerfile

@@ -6,6 +6,7 @@ MAINTAINER Malte Deiseroth <mdeiseroth88@gmail.com>
 COPY entrypoint.sh /entrypoint.sh
 COPY config.mk /config.mk
 COPY recorder.conf /etc/default/recorder.conf
+COPY recorder-health.sh /usr/local/sbin/recorder-health.sh
 
 ENV VERSION=0.8.0
 
@@ -25,12 +26,15 @@ RUN apk add --no-cache --virtual .build-deps \
     && cd / \
     && chmod 755 /entrypoint.sh \
     && rm -rf /usr/local/source \
+    && chmod 755 /usr/local/sbin/recorder-health.sh \
     && apk del .build-deps
 
 VOLUME ["/store", "/config"]
 
 COPY recorder.conf /config/recorder.conf
 
+HEALTHCHECK CMD /usr/local/sbin/recorder-health.sh
+
 EXPOSE 8083
 
 ENTRYPOINT ["/entrypoint.sh"]

recorder-health.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+addr=`hostname`
+port=8083
+
+epoch=$(date +%s)
+
+location=$(cat <<EOJSON
+{
+  "_type": "location",
+  "tid": "pp",
+  "lat": 51.47879,
+  "lon": -0.010677,
+  "tst": $epoch
+}
+EOJSON
+)
+
+# POST location to ping/ping, ignoring output
+curl -sSL --data "${location}" "http://${addr}:${port}/pub?u=ping&d=ping" > /dev/null
+
+# obtain tst of ping/ping's last location
+ret_epoch=$(curl -sSL http://${addr}:${port}/api/0/last --data "user=ping&device=ping" |
+           env python -c 'import sys, json; print json.load(sys.stdin)[0]["tst"];')
+
+if [ $epoch -ne $ret_epoch ]; then
+       echo PANIC $epoch $ret_epoch
+       exit 1
+else
+       echo OK
+       exit 0
+fi