fix

Simplify reloading the configuration with docker

docker-entrypoint.sh

@@ -10,6 +10,14 @@ handle() {
 
 trap handle INT TERM
 
+refresh() {
+	SIGNAL=$(( $? - 128 ))
+	echo "Caught signal ${SIGNAL}, refreshing"
+	kill -s ${SIGNAL} $(pidof node) 2>/dev/null
+}
+
+trap refresh HUP
+
 if ! which -- "${1}"; then
   # first arg is not an executable
   xvfb-run -a --server-args="-screen 0 1024x768x24" -- node /app/ "$@" &

docs/usage.rst

@@ -29,8 +29,10 @@ Default preview style and configuration
 - If no configuration file is specified, a default preview style (compatible with openmaptiles) is used.
 - If no mbtiles file is specified (and is not found in the current working directory), a sample file is downloaded (showing the Zurich area)
 
-Reloading configuration
+Reloading the configuration
 ======
 
 It is possible to reload the configuration file without restarting the whole process by sending a SIGHUP signal to the node process.
-However, this does not currently work when running the tileserver-gl docker container (the signal is not passed to the subprocess, see https://github.com/maptiler/tileserver-gl/issues/420#issuecomment-597507663).
+
+- The `docker kill -s HUP tileserver-gl` command can be used when running the tileserver-gl docker container.
+- The `docker-compose -s HUP tileserver-gl-service-name` can be used when tileserver-gl is run as a docker-compose service.

src/server.js

@@ -256,6 +256,17 @@ function start(opts) {
     res.send(result);
   });
 
+  app.get('/process', (req, res, next) => {
+    const result = {};
+    const id = req.query.style || '';
+    const item = {
+      'style': id + '.json'
+    };
+    result[id] = true;
+    addStyle(id, item, true, true);
+    res.send(serving.styles);
+  });
+
   const addTileJSONs = (arr, req, type) => {
     for (const id of Object.keys(serving[type])) {
       const info = clone(serving[type][id].tileJSON);