postgresql_backup. draft.

postgresql_backup/pg_backup.sh

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+#!/bin/bash
+
+# Configuration
+HOST="localhost"
+PORT="5432"
+USER="your_postgres_user"
+BACKUP_PATH="/path/to/backup/directory"
+DUMP_FORMAT="custom" # Set to "custom" for .dump or "sql" for plaintext SQL
+EXTENSION="dump" # Default extension
+
+# Adjust file extension based on dump format
+if [[ "$DUMP_FORMAT" == "sql" ]]; then
+  EXTENSION="sql.gz"
+fi
+
+# Create backup directory if it doesn't exist
+mkdir -p "$BACKUP_PATH"
+
+# Get a list of all databases, excluding template databases
+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 in $DATABASES; do
+  BACKUP_FILE="$BACKUP_PATH/$DB.$EXTENSION"
+  
+  if [[ "$DUMP_FORMAT" == "custom" ]]; then
+    # Create a compressed custom-format backup
+    pg_dump -h "$HOST" -p "$PORT" -U "$USER" -Fc "$DB" -f "$BACKUP_FILE"
+  elif [[ "$DUMP_FORMAT" == "sql" ]]; then
+    # Create a plain-text SQL backup and compress it with gzip
+    pg_dump -h "$HOST" -p "$PORT" -U "$USER" "$DB" | gzip > "$BACKUP_FILE"
+  else
+    echo "Invalid DUMP_FORMAT specified: $DUMP_FORMAT"
+    exit 1
+  fi
+
+  echo "Backup for database '$DB' created at '$BACKUP_FILE'"
+done