Dockerfile.rewriter

 FROM openresty/openresty:alpine AS without_tag
 
-COPY docker/balance_tracker_nginx.conf /usr/local/openresty/nginx/conf/nginx.conf
+COPY docker/balance_tracker_nginx.conf.template /usr/local/openresty/nginx/conf/nginx.conf.template
+COPY docker/rewriter_entrypoint.sh /entrypoint.sh
 COPY rewrite_rules.conf /usr/local/openresty/nginx/conf/rewrite_rules.conf
 
+CMD ["/entrypoint.sh"]
+
 ARG BUILD_TIME
 ARG GIT_COMMIT_SHA
 ARG GIT_CURRENT_BRANCH

balance-tracker.sh

@@ -254,7 +254,7 @@ process_blocks() {
     echo 'Running indexer for existing blocks and expecting new blocks...'
   fi
 
-  postgres_access=${postgres_url:-"postgresql://$postgres_user@$postgres_host:$postgres_port/haf_block_log"}
+  postgres_access=${postgres_url:-"postgresql://$postgres_user@$postgres_host:$postgres_port/haf_block_log?application_name=btracker_block_processing"}
 
   if [ -z "$log_dir" ]; then
     echo "Running indexer in the foreground"

docker/balance_tracker_nginx.conf → docker/balance_tracker_nginx.conf.template

@@ -16,7 +16,10 @@ http {
 
             location / {
                     include rewrite_rules.conf;
-                    rewrite_log on;
+                    # ${REWRITE_LOG} will be replaced by the docker entrypoint script.
+                    # Set REWRITE_LOG=on in the environment to enable rewrite logging,
+                    # otherwise it will remain disabled
+                    ${REWRITE_LOG}
 
                     proxy_pass  http://balance-tracker-postgrest:3000;  # my PostREST is  here!
 
@@ -29,4 +32,11 @@ http {
                     proxy_http_version 1.1;
             }
     }
+    server {
+        listen 0.0.0.0:81;
+
+        location /health {
+            return 204;
+        }
+    }
 }

docker/rewriter_entrypoint.sh

+#!/bin/sh
+
+# Default value for REWRITE_LOG is off, unless explicitly set to 'on'
+if [ "$REWRITE_LOG" = "on" ]; then
+    REWRITE_LOG="rewrite_log on;"
+else
+    REWRITE_LOG="# rewrite_log off;"
+fi
+
+# Use sed to replace the placeholder in the nginx template file
+sed "s|\${REWRITE_LOG}|$REWRITE_LOG|g" /usr/local/openresty/nginx/conf/nginx.conf.template > /usr/local/openresty/nginx/conf/nginx.conf
+
+# Start nginx
+/usr/local/openresty/bin/openresty -g 'daemon off;'

scripts/install_app.sh

@@ -65,7 +65,7 @@ while [ $# -gt 0 ]; do
     shift
 done
 
-POSTGRES_ACCESS=${POSTGRES_URL:-"postgresql://$POSTGRES_USER@$POSTGRES_HOST:$POSTGRES_PORT/haf_block_log"}
+POSTGRES_ACCESS=${POSTGRES_URL:-"postgresql://$POSTGRES_USER@$POSTGRES_HOST:$POSTGRES_PORT/haf_block_log?application_name=btracker_install"}
 
 echo "Installing app..."
 psql "$POSTGRES_ACCESS" -v ON_ERROR_STOP=on  -f "$SCRIPTPATH/../db/builtin_roles.sql"

scripts/uninstall_app.sh

@@ -59,7 +59,7 @@ while [ $# -gt 0 ]; do
     shift
 done
 
-POSTGRES_ACCESS_ADMIN=${POSTGRES_URL:-"postgresql://$POSTGRES_USER@$POSTGRES_HOST:$POSTGRES_PORT/haf_block_log"}
+POSTGRES_ACCESS_ADMIN=${POSTGRES_URL:-"postgresql://$POSTGRES_USER@$POSTGRES_HOST:$POSTGRES_PORT/haf_block_log?application_name=btracker_uninstall"}
 
 
 uninstall_app() {