adding mydbdump

shell/mydbdump.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+#
+# SIMPLE MySQL backup: dumps a complete database, keeping 7 days worth
+# of backups in rotation. run nightly.
+#
+# Ensure you have a privileged login cookied for the user who will
+# run this script. E.g.:
+#
+# /root/.my.cnf:
+# [client]
+# user=root
+# password=p@ssw0rd
+#
+# SPDX-License-Identifier: MIT
+
+MYD_BDIR=/opt/backups/database
+MYD_DUMP=/usr/bin/mysqldump
+MYD_BZ2=/usr/bin/bzip2
+
+# get the day of week, 1 = Monday
+DOW=$(date "+%u")
+
+# we overwrite the old weekday's backup
+MYD_BLOG="$MYD_BDIR/db-backup.log.${DOW}"
+MYD_BFILE="$MYD_BDIR/db-backup.sql.${DOW}"
+
+# the real export procedure
+$MYD_DUMP -A --opt 1>"$MYD_BFILE" 2>"$MYD_BLOG"
+
+# erase old bz2 files
+if [ -f "${MYD_BFILE}.bz2" ]; then
+  rm -f "${MYD_BFILE}.bz2"
+fi
+if [ -f "${MYD_BLOG}.bz2" ]; then
+  rm -f "${MYD_BLOG}.bz2"
+fi
+
+# compress our files to save some space
+$MYD_BZ2 "$MYD_BFILE"
+$MYD_BZ2 "$MYD_BLOG"
+
+exit 0