Add ntpd server to the stack

docker/docker-compose.yml

@@ -11,6 +11,14 @@ x-op-service-default: &service_default
   init: true
 
 services:
+  ntpd:
+    <<: *service_default
+    image: daniviga/ntpd
+    networks:
+      - net
+    ports:
+      - "127.0.0.1:123:123/udp"
+
   timescale:
     <<: *service_default
     image: timescale/timescaledb:latest-pg12

docker/ntpd/Dockerfile

@@ -0,0 +1,8 @@
+FROM alpine:3.9
+
+RUN apk update && apk add chrony && \
+    chown -R chrony:chrony /var/lib/chrony
+COPY ./chrony.conf /etc/chrony/chrony.conf
+
+EXPOSE 123/udp
+ENTRYPOINT ["chronyd", "-d", "-s", "-x"]

docker/ntpd/chrony.conf

@@ -0,0 +1,3 @@
+pool pool.ntp.org iburst
+initstepslew 10 pool.ntp.org
+driftfile /var/lib/chrony/chrony.drift