Add logging into log manager script

bubble-server/src/main/resources/packer/roles/bubble/files/log_manager.sh

@@ -2,35 +2,52 @@
 #
 # Copyright (c) 2020 Bubble, Inc.  All rights reserved. For personal (non-commercial) use, see license: https://getbubblenow.com/bubble-license/
 #
+LOG=/var/log/bubble/log_manager.log
+
+function log {
+  echo "$(date): ${1}" >> ${LOG}
+}
+
 BUBBLE_LOGS_FOLDER=/var/log/bubble
 POSTGRES_LOGS_FOLDER=$(readlink -f "${BUBBLE_LOGS_FOLDER}"/postgresql)
 REDIS_LOG_FLAG_KEY="bubble.StandardSelfNodeService.bubble_server_logs_enabled"
 
 REDIS_LOG_FLAG_VALUE=$(echo "get ${REDIS_LOG_FLAG_KEY}" | redis-cli | xargs echo | tr '[:upper:]' '[:lower:]')
 
+log "starting log manager with REDIS_LOG_FLAG_VALUE=${REDIS_LOG_FLAG_VALUE}"
 if [[ ${REDIS_LOG_FLAG_VALUE} == true ]]; then
   is_reload_needed=false
   is_psql_restart_needed=false
   # Cannot use -L option in find here as links are actually find's target:
   for logFile in $(find "${BUBBLE_LOGS_FOLDER}"/* -type l ! -name postgresql); do
+    log "recreating real bubble log file: ${logFile}"
     rm "${logFile}"
     touch "${logFile}"
+    if [[ "${logFile}" == "${LOG}" ]]; then
+      log "...starting fresh log after activation..."
+    fi
     is_reload_needed=true
   done
   for psqlLogFile in $(find "${POSTGRES_LOGS_FOLDER}"/* -type l); do
+    log "removing postgres link log file making room for a real one: ${logFile}"
     rm "${psqlLogFile}"
     is_psql_restart_needed=true
   done
 
   if [[ ${is_psql_restart_needed} == true ]]; then
+    log "restarting postgres service"
     service postgresql restart
   fi
   if [[ ${is_reload_needed} == true ]]; then
+    log "reloading supervisor"
     supervisorctl reload
   fi
 else
   # following dir link with -L option, so no need for special postgres for loop in this case:
   for logFile in $(find -L "${BUBBLE_LOGS_FOLDER}"/* -type f); do
+    log "force-creating link to /dev/null instead of log file ${logFile}"
     ln -sf /dev/null "${logFile}"
   done
 fi
+
+log "ending log manager"