postgresql_backup/pg_backup.sh

@@ -34,15 +34,23 @@ for PREFIX in $DATABASE_PREFIXES; do
     continue
   fi
 
-  # Create a directory for each server using host and port
+  # Create a directory for each server using host and port, only if it doesn't exist
   SERVER_DIR="$BACKUP_PATH/${HOST}_${PORT}"
-  mkdir -p "$SERVER_DIR"
+  if [ ! -d "$SERVER_DIR" ]; then
+    echo "Creating backup directory: $SERVER_DIR"
+    mkdir -p "$SERVER_DIR"
+  else
+    echo "Backup directory $SERVER_DIR already exists, skipping creation."
+  fi
 
   # Get a list of all databases for this server, excluding template databases
+  echo "Fetching databases for $HOST:$PORT ..."
   DATABASES=$(psql -h "$HOST" -p "$PORT" -U "$USER" -d postgres -t -c "SELECT datname FROM pg_database WHERE datistemplate = false;")
 
   # Loop over each database and create a backup
   for DB_NAME in $DATABASES; do
+    echo "Starting backup for database '$DB_NAME' on $HOST:$PORT..."
+
     # Set file extension based on DUMP_FORMAT
     EXTENSION="dump"
     if [[ "$DUMP_FORMAT" == "sql" ]]; then
@@ -51,19 +59,22 @@ for PREFIX in $DATABASE_PREFIXES; do
 
     # Set backup file path within the server-specific directory
     BACKUP_FILE="$SERVER_DIR/$DB_NAME.$EXTENSION"
+    echo "Backup file: $BACKUP_FILE"
 
     # Perform the backup based on the specified format
     if [[ "$DUMP_FORMAT" == "custom" ]]; then
-      # Custom format and highest ZSTD compression level
+      echo "Performing custom format backup with zstd compression level 21..."
       pg_dump -h "$HOST" -p "$PORT" -U "$USER" -Fc --compress="zstd:21" "$DB_NAME" -f "$BACKUP_FILE"
     elif [[ "$DUMP_FORMAT" == "sql" ]]; then
-      # Plain-text SQL backup compressed with gzip at high compression level
+      echo "Performing SQL format backup with gzip compression..."
       pg_dump -h "$HOST" -p "$PORT" -U "$USER" "$DB_NAME" | gzip -9 > "$BACKUP_FILE"
     else
       echo "Invalid DUMP_FORMAT for $PREFIX: $DUMP_FORMAT. Skipping..."
       continue
     fi
 
-    echo "Backup for database '$DB_NAME' created at '$BACKUP_FILE'"
+    echo "Backup for database '$DB_NAME' on $HOST:$PORT completed successfully."
   done
 done
+
+echo "Backup process completed."