Added ability to dynamically reload caddy server on config changes

docker/Dockerfile

@@ -2,8 +2,10 @@ FROM alpine
 MAINTAINER Marios Andreopoulos <marios@landoop.com>
 
 WORKDIR /
+VOLUME ["/tmp"]
+
 # Add needed tools
-RUN apk add --no-cache ca-certificates wget \
+RUN apk add --no-cache ca-certificates wget inotify-tools \
     && echo "progress = dot:giga" | tee /etc/wgetrc
 
 # Add and Setup Caddy webserver
@@ -24,8 +26,9 @@ RUN wget "$KAFKA_CONNECT_UI_URL" -O /kafka-connect-ui.tar.gz \
 
 # Add configuration and runtime files
 ADD Caddyfile /caddy/Caddyfile.template
-ADD run.sh /
-RUN chmod +x /run.sh
+ADD run.sh wait.sh /
+
+RUN chmod +x /run.sh /wait.sh
 
 EXPOSE 8000
 

docker/README.md

@@ -60,6 +60,11 @@ The only option for the UI, is the URL(s) of your Connect cluster(s).
   Usually the main reason for using this is when you run the
   container with `--net=host`, where you can't use docker's publish
   flag (`-p HOST_PORT:8000`).
+
+- `RELOAD[true|false]`
+
+    Whether to reload the caddy configuration in case it has been externally changed.  
+
 - `CADDY_OPTIONS=[OPTIONS]`
 
   The webserver that powers the image is Caddy. Via this variable

docker/run.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
 PROXY="${PROXY:-true}"
+RELOAD="${RELOAD:-false}"
+
 PROXY_SKIP_VERIFY="${PROXY_SKIP_VERIFY:-false}"
 INSECURE_PROXY=""
 CADDY_OPTIONS="${CADDY_OPTIONS:-}"
@@ -99,5 +101,13 @@ http://0.0.0.0:$PORT
 EOF
 } 1>&2
 
+if echo "$RELOAD" | egrep -sq "true|TRUE|y|Y|yes|YES|1"; then
+    echo "Enabling watch on caddy config file."
+    ./wait.sh&
+    exec /caddy/caddy -conf /tmp/Caddyfile -quiet
+else
+    exec /caddy/caddy -conf /tmp/Caddyfile -quiet
+fi
+
+
 
-exec /caddy/caddy -conf /tmp/Caddyfile -quiet

docker/wait.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+inotifywait -m -e  modify,close_write /tmp/Caddyfile | while read file; do pkill -USR1 caddy; done
+
+
+