Cache cleaner - Delete tegola process after x numbers (#298)

* Remove tegola process

* Add env vars to clean cache

* Add quote for values - cache cleaner

* Update var names

* Add quote for en var

Author: Ruben L. Mendoza

images/tiler-server/Dockerfile

@@ -52,4 +52,6 @@ COPY ./start.sh .
 COPY ./expire-watcher.sh .
 COPY ./seed-by-diffs.sh .
 COPY ./tile_cache_downloader.sh .
-CMD ./start.sh & ./tile_cache_downloader.sh & ./expire-watcher.sh
+COPY ./rm_tegola_ps.sh .
+
+CMD ./start.sh & ./tile_cache_downloader.sh & ./expire-watcher.sh & ./rm_tegola_ps.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
+  ./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 "${KILL_PROCESS}" && "${KILL_PROCESS}" == "manually" ]]; then
+    while true; do
+        NUM_PS=$(ps | grep ${PROCESS_NAME} | grep -v grep | wc -l)
+        if [[ $NUM_PS -gt $MAX_NUM_PS ]]; then
+            aws s3 rm s3://${TILER_CACHE_BUCKET}/mnt/data/osm/ --recursive
+            echo "${PROCESS_NAME} processes"
+            ps aux | grep ${PROCESS_NAME} | grep -v grep
+            # After clearing the S3 cache, terminate all 'tegola' processes.
+            killall ${PROCESS_NAME}
+        fi
+        sleep 600
+    done
+fi

osm-seed/templates/tiler-server/tiler-server-cache-cleaner-deployment.yaml

@@ -62,6 +62,12 @@ spec:
               value: {{ quote .Values.tilerServer.env.TILER_CACHE_AWS_SECRET_ACCESS_KEY }}
             - name: TILER_CACHE_MAX_ZOOM
               value: {{ quote .Values.tilerServer.env.TILER_CACHE_MAX_ZOOM }}
+            - name: MAX_NUM_PS
+              value: {{ quote .Values.tilerServerCacheCleaner.env.MAX_NUM_PS }}
+            - name: PROCESS_NAME
+              value: {{ .Values.tilerServerCacheCleaner.env.PROCESS_NAME }}
+            - name: KILL_PROCESS
+              value: {{ .Values.tilerServerCacheCleaner.env.KILL_PROCESS }}
             - name: CLOUDPROVIDER
               value: {{ .Values.cloudProvider }}
             # In case cloudProvider=aws

osm-seed/values.yaml

@@ -443,10 +443,19 @@ tilerServerCacheCleaner:
     limits:
       memory: '2Gi'
       cpu: '2'
+  env:
+    KILL_PROCESS: manually
+    MAX_NUM_PS: 3
+    PROCESS_NAME: tegola
   nodeSelector:
     enabled: false
     label_key: nodegroup_type
     label_value: tiler
+  autoscaling:
+    enabled: false
+    minReplicas: 1
+    maxReplicas: 2
+    cpuUtilization: 60
 # ====================================================================================================
 # Variables for tiler-visor
 # ====================================================================================================