Use /dev/shm for the started marker file

Because /dev/shm will be automatically wiped on container restarts.

Author: felipecrs

OracleDatabase/SingleInstance/dockerfiles/21.3.0/Dockerfile

@@ -59,6 +59,7 @@ ENV ORACLE_BASE=/opt/oracle \
     INSTALL_DB_BINARIES_FILE="installDBBinaries.sh" \
     RELINK_BINARY_FILE="relinkOracleBinary.sh" \
     CONFIG_TCPS_FILE="configTcps.sh" \
+    DB_STARTED_MARKER_FILE="/dev/shm/.db_started" \
     SLIMMING=$SLIMMING \
     ENABLE_ARCHIVELOG=false \
     ARCHIVELOG_DIR_NAME=archive_logs \

OracleDatabase/SingleInstance/dockerfiles/21.3.0/checkDBStatus.sh

@@ -73,8 +73,8 @@ EOF
 ################ MAIN #######################
 #############################################
 
-if [ "${BYPASS_STARTED_MARKER:-false}" = false ] && [ ! -f /tmp/.oracle_database_started ]; then
-   echo "Database was not started yet" >&2
+if [ "$IGNORE_DB_STARTED_MARKER" != true ] && [ ! -f "$DB_STARTED_MARKER_FILE" ]; then
+   echo "Database was not started yet." >&2
    exit 1
 fi
 

OracleDatabase/SingleInstance/dockerfiles/21.3.0/runOracle.sh

@@ -113,9 +113,6 @@ EOF
 # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! #
 ###################################
 
-# Marker file for the healthcheck
-rm -f /tmp/.oracle_database_started
-
 # Check whether container has enough memory
 if [[ -f /sys/fs/cgroup/cgroup.controllers ]]; then
   memory=$(cat /sys/fs/cgroup/memory.max)
@@ -283,7 +280,7 @@ else
   "$ORACLE_BASE"/"$CREATE_DB_FILE" $ORACLE_SID "$ORACLE_PDB" "$ORACLE_PWD" || exit 1;
 
   # Check whether database is successfully created
-  if BYPASS_STARTED_MARKER=true "$ORACLE_BASE"/"$CHECK_DB_FILE"; then
+  if IGNORE_DB_STARTED_MARKER=true "$ORACLE_BASE"/"$CHECK_DB_FILE"; then
     # Create a checkpoint file if database is successfully created
     # Populate the checkpoint file with the current date to avoid timing issue when using NFS persistence in multi-replica mode
     echo "$(date -Iseconds)" > "$ORACLE_BASE"/oradata/.${ORACLE_SID}"${CHECKPOINT_FILE_EXTN}"
@@ -306,7 +303,7 @@ else
 fi;
 
 # Check whether database is up and running
-BYPASS_STARTED_MARKER=true "$ORACLE_BASE"/"$CHECK_DB_FILE"
+IGNORE_DB_STARTED_MARKER=true "$ORACLE_BASE"/"$CHECK_DB_FILE"
 status=$?
 
 # Check whether database is up and running
@@ -321,8 +318,8 @@ if [ $status -eq 0 ]; then
   # Execute custom provided startup scripts
   "$ORACLE_BASE"/"$USER_SCRIPTS_FILE" "$ORACLE_BASE"/scripts/startup
 
-  # Marker file for the healthcheck
-  touch /tmp/.oracle_database_started
+  # Create marker file for the healthcheck
+  touch "$DB_STARTED_MARKER_FILE"
 else
   echo "#####################################"
   echo "########### E R R O R ###############"