Postgres Docker Backups
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POSTGRES_CONTAINER_NAME=my_pg_container
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POSTGRES_DB=my_db
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POSTGRES_USER=root
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POSTGRES_PASSWORD=stronkpassword
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BACKUP_SOURCE_PATH=/home/x/services/gitea/backups
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KEEP_BACKUP_COUNT=5
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#GOOGLE_DRIVE_FOLDER_ID=
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#GOOGLE_DRIVE_KEEP_BACKUP_COUNT=
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#!/bin/bash
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# Preloader
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# Determine the directory of the script
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SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
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PROGRAM_NAME="PostgreSQL Backup"
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### [ Imports ] ###
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# Import Colors
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source "$SCRIPT_DIR/../lib/colors.sh"
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# Import configuration
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source "$SCRIPT_DIR/config.sh"
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# Import Functions
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source "$SCRIPT_DIR/../lib/functions.sh"
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### [ Functions ] ###
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backup_from_docker() {
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# Reference to the postgres container id
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POSTGRES_DOCKER_CONTAINER=$(docker ps -qf name="${POSTGRES_CONTAINER_NAME}")
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# Ensure the backup directory exists
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mkdir -p "${BACKUP_SOURCE_PATH}"
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# The name of the backup file
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BACKUP_FILE="${BACKUP_SOURCE_PATH}/pg_dump_$(date +%Y-%m-%d_%H%M%S).sql.gz"
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# Run the backup process
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if PGPASSWORD=$POSTGRES_PASSWORD docker exec $POSTGRES_DOCKER_CONTAINER pg_dump -U $POSTGRES_USER -h localhost $POSTGRES_DB | gzip > $BACKUP_FILE; then
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log "PostgreSQL backup created successfully."
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else
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error "Failed to create PostgreSQL backup."
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send_discord_notification "Failed to create PostgreSQL backup." "16711680"
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exit 1
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fi
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log "Backup file $BACKUP_FILE created."
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}
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delete_old_local_backups() {
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# Keep only the last $KEEP_BACKUP_COUNT backups
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if [ -n "$KEEP_BACKUP_COUNT" ]; then
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# Get the number of backup files
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BACKUP_COUNT=$(ls -1 $BACKUP_SOURCE_PATH/pg_dump_*.sql.gz | wc -l)
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# Check if the current number of backups exceeds the limit
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if [ "$BACKUP_COUNT" -gt "$KEEP_BACKUP_COUNT" ]; then
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log "Removing old backups."
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# Remove the oldest files
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ls -1tr $BACKUP_SOURCE_PATH/pg_dump_*.sql.gz | head -n -$KEEP_BACKUP_COUNT | xargs -d '\n' rm -f
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fi
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fi
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}
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# Google Drive
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upload_to_google_drive() {
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if [ -n "$GOOGLE_DRIVE_FOLDER_ID" ] && [ -n "$BACKUP_FILE" ]; then
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log "Uploading backup to google drive."
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gdrive upload --parent $GOOGLE_DRIVE_FOLDER_ID $BACKUP_FILE
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if [ $? -eq 0 ]; then
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log "Backup file uploaded to Google Drive."
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send_discord_notification "Backup file uploaded to Google Drive." "65280"
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else
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error "Failed to upload backup file to Google Drive."
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send_discord_notification "Failed to upload backup file to Google Drive." "16711680"
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exit 1
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fi
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else
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log "Google Drive upload not configured. Skipping."
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fi
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}
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delete_old_gdrive_backups() {
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if [ -n "$GOOGLE_DRIVE_FOLDER_ID" ] && [ -n "$GOOGLE_DRIVE_KEEP_BACKUP_COUNT" ]; then
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GCLOUD_BACKUPS=$(gdrive list --query "'$GOOGLE_DRIVE_FOLDER_ID' in parents" --order "createdTime" --no-header | awk '{print $1}')
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BACKUP_COUNT=$(echo "$GCLOUD_BACKUPS" | wc -l)
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log "Deleting old gdrive backups."
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if [ "$BACKUP_COUNT" -gt "$GOOGLE_DRIVE_KEEP_BACKUP_COUNT" ]; then
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DELETE_COUNT=$((BACKUP_COUNT - GOOGLE_DRIVE_KEEP_BACKUP_COUNT))
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DELETE_BACKUPS=$(echo "$GCLOUD_BACKUPS" | head -n "$DELETE_COUNT")
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echo "$DELETE_BACKUPS" | while read -r BACKUP_ID; do
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if [ -n "$BACKUP_ID" ]; then
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gdrive delete $BACKUP_ID
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if [ $? -eq 0 ]; then
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local MSG_X="Deleted old backup with ID ${BACKUP_ID} from Google Drive."
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log "${MSG_X}"
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send_discord_notification "${MSG_X}" "16776960"
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else
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local MSG_X="Failed to delete backup with ID $BACKUP_ID from Google Drive."
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log "${MSG_X}"
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send_discord_notification "${MSG_X}" "16711680"
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fi
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fi
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done
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else
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log "No old backups to delete."
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fi
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else
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log "Google Drive cleanup not configured. Skipping."
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fi
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}
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### [ Main ] ###
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echo -e "${YELLOW}Starting ${PROGRAM_NAME}...${NC}"
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send_discord_notification "Starting PostgreSQL backup..." "16776960" # Yellow color
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check_required_programs "$SCRIPT_DIR/required_programs.txt"
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# Run the main backup process
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backup_from_docker
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# Run google drive backup
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upload_to_google_drive
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# Delete old files
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delete_old_local_backups
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delete_old_gdrive_backups
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# Final message
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log "Backup process completed."
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send_discord_notification "Backup process completed." "65280"
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