Deprecate USR1 signal handling, add USR2 with same semantic

Closes #71

NEWS.md

@@ -3,6 +3,7 @@
 * Handle SQL API errors by requesting no Varnish cache
 * Fix X-Cache-Channel for multilayer (by token) responses
 * Add last_modified field to POST layergroup response (#72)
+* Deprecate signal handler for USR1, add handler for USR2 (#71)
 
 1.1.8
 -----

app.js

@@ -46,6 +46,11 @@ ws.on('listening', function() {
   console.log("Windshaft tileserver started on " + global.environment.host + ':' + global.environment.port);
 });
 
+// DEPRECATED, use SIGUSR2
 process.on('SIGUSR1', function() {
   ws.dumpCacheStats();
 });
+
+process.on('SIGUSR2', function() {
+  ws.dumpCacheStats();
+});

tools/munin/windshaft

@@ -67,7 +67,7 @@ for pid in ${pids}; do
 
   log=$(grep "${pid}" "${tmpreport}" | grep -w 1w | awk '{print $9}')
   if test -e "${log}"; then
-    kill -USR1 "${pid}"
+    kill -USR2 "${pid}"
     cnt=$(tac ${log} | sed -n -e '/ItemKey/p;/^RenderCache/q' | wc -l)
     if test $cnt -gt $maxcache; then maxcache=$cnt; fi
   else