Add script for database backup to S3

archive-backup.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+set -euxo pipefail
+
+today=`date +"%Y-%m-%d"`
+echo $today
+dump_file=/tmp/myskillbox_backup.dump
+
+# look up the list of backups from the heroku cli,
+# then look for the first line of the backup list and
+# look for today's date. script fails if nothing is found
+# (grep exits with an error code)
+heroku pg:backups --app $APP_NAME | grep '=== Backups' -A 3 | grep -q $today
+heroku pg:backups:download --app $APP_NAME --output=$dump_file
+# gzip it
+gzip $dump_file
+# encrypt the backup file
+gpg --yes --passphrase=$PG_BACKUP_KEY --batch -c $dump_file.gz
+rm $dump_file.gz
+
+BACKUP_FILE_NAME="myskillbox-pg-backup-$(date '+%Y-%m-%d_%H.%M').gpg"
+
+# temporarily set the access key, because we use a different one for the backup and
+# the default S3 bucket for Django
+AWS_ACCESS_KEY_ID=$BACKUP_AWS_ACCESS_KEY_ID
+AWS_SECRET_ACCESS_KEY=$BACKUP_AWS_SECRET_ACCESS_KEY
+aws s3 cp $dump_file.gz.gpg "s3://${BACKUP_S3_BUCKET_NAME}/${BACKUP_FILE_NAME}"
+rm $dump_file.gz.gpg