From 22b5aa5e1d12ed55d58013c93c36b2e1ea8ee1b0 Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Thu, 16 Mar 2006 10:28:44 +0000
Subject: Support multiple hosts in backup-mysql

git-svn-id: svn+ssh://asteria.noreply.org/svn/weaselutils/trunk@62 bc3d92e2-beff-0310-a7cd-cc87d7ac0ede
---
 backup-mysql | 67 +++++++++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 51 insertions(+), 16 deletions(-)

diff --git a/backup-mysql b/backup-mysql
index b964833..f6c8b99 100755
--- a/backup-mysql
+++ b/backup-mysql
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 #
 # Copyright (c) 2002, 2003, 2004, 2005 Peter Palfrader <peter@palfrader.org>
@@ -21,21 +21,56 @@ else
 	exit 1
 fi
 
-echo 'SHOW DATABASES;' | mysql | tail -n +2 |
-while read db; do
-	if [ "$db" = "innodb" -o "$db" = "test" ] ; then
-		continue;
-	fi
-
-	file="$TARGET/$DATE-$db"
-	mysqldump --opt --lock-tables -- "$db" > "$file"
-	bzip2 -- "$file"
+HOSTS="$@"
+if [ -z "$HOSTS" ]; then
+	HOSTS="localhost"
+fi
 
-	md5=`md5sum -- "$file.bz2" | awk '{print $1}'`
-	if [ -e "$TARGET/MD5-$md5" ]; then
-		rm -- "$file.bz2"
-		ln "$TARGET/MD5-$md5" "$file.bz2"
+for host in $HOSTS; do
+	if [ "$host" = "localhost" ]; then
+		prefix="";
+		postfix="";
 	else
-		ln "$file.bz2" "$TARGET/MD5-$md5"
+		shorthost=`echo "$host" | sed -e 's/\..*//'`
+		echo $shorthost
+		prefix="$shorthost--";
+		postfix="--$shorthost";
 	fi
-done | egrep -v 'Database ".*" dropped'
+	mysqlcnf="$HOME/.my.cnf$postfix"
+	if ! [ -e "$mysqlcnf" ]; then
+		echo "Cannot find my.cnf for host $host: $mysqlcnf" >&2
+		exit 1
+	fi
+
+	DBs=$(
+	echo 'SHOW DATABASES;' | mysql --defaults-file="$mysqlcnf" --host="$host" | tail -n +2 |
+	while read db; do
+		if [ "$db" = "innodb" -o "$db" = "test" ] ; then
+			continue;
+		fi
+		echo $db;
+	done
+	);
+
+	for db in $DBs; do
+		file="$TARGET/$DATE-$prefix$db"
+		mysqldump --defaults-file="$mysqlcnf" --host="$host" --opt --lock-tables -- "$db" > "$file"
+	done
+
+	for db in $DBs; do
+		file="$TARGET/$DATE-$prefix$db"
+		echo $file
+	done | xargs --no-run-if-empty --max-procs 4 -n 1 bzip2
+
+	for db in $DBs; do
+		file="$TARGET/$DATE-$prefix$db"
+
+		md5=`md5sum -- "$file.bz2" | awk '{print $1}'`
+		if [ -e "$TARGET/MD5-$md5" ]; then
+			rm -- "$file.bz2"
+			ln "$TARGET/MD5-$md5" "$file.bz2"
+		else
+			ln "$file.bz2" "$TARGET/MD5-$md5"
+		fi
+	done
+done
-- 
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