Remove tegola process when there are more than x number

images/tiler-server/Dockerfile

@@ -51,4 +51,5 @@ COPY ./expire-watcher.sh .
 COPY ./seed-by-diffs.sh .
 COPY ./tile_cache_downloader.sh .
 COPY ./cache_cleaner.sh .
+COPY ./rm_tegola_ps.sh .
 # CMD ./start.sh & ./tile_cache_downloader.sh & ./expire-watcher.sh

images/tiler-server/cache_cleaner.sh

@@ -3,5 +3,5 @@ flag=true
 while "$flag" = true; do
   pg_isready -h $POSTGRES_HOST -p 5432 >/dev/null 2>&2 || continue
   flag=false
-  ./tile_cache_downloader.sh & ./expire-watcher.sh
-done
+  ./tile_cache_downloader.sh & ./expire-watcher.sh & ./rm_tegola_ps.sh
+done

images/tiler-server/rm_tegola_ps.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -e
+if [[ -n "${CLEAN_CACHE_MANUALLY}" && "${CLEAN_CACHE_MANUALLY}" == "true" && "${TILER_CACHE_TYPE}" && "${TILER_CACHE_TYPE}" == "s3" ]]; then
+    while true; do
+        NUM_PS_TEGOLA=$(ps | grep ${CACHE_PROCESS_NAME} | grep -v grep | wc -l)
+        if [[ $NUM_PS_TEGOLA -gt $MAX_PS_TEGOLA ]]; then
+            aws s3 rm s3://${TILER_CACHE_BUCKET}/mnt/data/osm/ --recursive
+            echo "${CACHE_PROCESS_NAME} processes"
+            ps aux | grep ${CACHE_PROCESS_NAME} | grep -v grep
+            # After clearing the S3 cache, terminate all 'tegola' processes.
+            killall ${CACHE_PROCESS_NAME}
+        fi
+        sleep 600
+    done
+fi