From 5bff5f1ad48cedc971ab59fd78ee5b09bfab5a7f Mon Sep 17 00:00:00 2001
From: lucvic <vicidomini@gmail.com>
Date: Wed, 14 Oct 2015 15:43:33 +0200
Subject: [PATCH] Locality abstraction for db-backup and db-restore

---
 cluster-manager.sh | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 77 insertions(+), 16 deletions(-)

diff --git a/cluster-manager.sh b/cluster-manager.sh
index f0beadf..71049da 100644
--- a/cluster-manager.sh
+++ b/cluster-manager.sh
@@ -2,7 +2,7 @@
 
 # The MIT License (MIT)
 #
-# Copyright (c) <year> <copyright holders>
+# Copyright (c) 2015 ISISLab, Università degli Studi di Salerno
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -23,6 +23,62 @@
 # THE SOFTWARE.
 
 #
+# FUNCTIONS DEFINITIONS
+#
+
+# host_exec_cmd
+#
+# Description:
+#     Calls a command on a host, abstracting the locality of the host.
+#
+# Parameters:
+#     $1 hostname where to perform the command
+#     $2 the command to execute
+function host_exec_cmd {
+	if [ "$MYHOST" == "$1" ]; then
+		"$2"
+	else
+		ssh -t ${SSH_USER}${1}.routetopa.eu "$2"
+	fi
+}
+
+# host_send_file
+#
+# Description:
+#     Send a local file to remote host. If the copy is issued on the local host
+#     itself, the command is ignored.
+#
+# Parameters:
+#     $1 hostname to copy the file to
+#     $2 local filename
+#     $3 remote localhost
+function host_send_file {
+	if [ "$MYHOST" == "$1" ]; then
+		mv ${2} ${3}
+	else
+		scp ${2} ${SSH_USER}${1}.routetopa.eu:${2}
+	fi
+}
+
+# host_recv_file
+#
+# Description:
+#     Receive a remote file to localhost host. If the copy is issued on the local host
+#     itself, the command is ignored.
+#
+# Parameters:
+#     $1 hostname to copy the file from
+#     $2 remote filename
+#     $3 local filename
+function host_recv_file {
+	if [ "$MYHOST" == "$1" ]; then
+		mv ${2} ${3}
+	else
+		scp ${SSH_USER}${1}.routetopa.eu:${2} ./${3}
+	fi
+}
+
+#
 # DEFAULT OPTIONS
 #
 
@@ -35,6 +91,7 @@ MYSQL_PASS=is15rdc
 MYSQL_DB=oxwall
 
 HOSTLIST=(
+	'spod'
 	'prato'
 	'dublin'
 	'issy'
@@ -101,31 +158,35 @@ echo 'NOTE: THIS ACTION HAS NOT BEEN TESTED YET!! JUST ECHOING COMMANDS...'
 			echo ssh -t ${SSH_USER}${HOST}.routetopa.eu "source $ARG_SCRIPT_NAME; rm $ARG_SCRIPT_NAME"
 		done
 		;;
-	db-restore)
+	db-backup)
 		ARG_BACKUP_NAME=$2
 		if [ -z $ARG_BACKUP_NAME ]; then
-			echo "ERROR: Please specify the name of the backup. e.g.: $0 backup.sql"
-			exit 1
-		fi
-		if [ ! -f $ARG_BACKUP_NAME ]; then
-			echo "ERROR: File $ARG_BACKUP_NAME does not exists"
-			exit 1
+			ARG_BACKUP_NAME="${MYSQL_DB}-$(date +%Y%m%d-%H%M%S).sql"
+			echo "No given backup filename. Using $ARG_BACKUP_NAME"
 		fi
 		for HOST in ${HOSTLIST[@]}; do
-			scp $ARG_BACKUP_NAME ${SSH_USER}${HOST}.routetopa.eu:$ARG_BACKUP_NAME
-			ssh -t ${SSH_USER}${HOST}.routetopa.eu "mysql -u${MYSQL_USER} -p${MYSQL_PASS} ${MYSQL_DB} < ${ARG_BACKUP_NAME}"
+			host_exec_cmd ${HOST} "mysqldump -u${MYSQL_USER} -p${MYSQL_PASS} ${MYSQL_DB} > ${ARG_BACKUP_NAME}"
+			host_recv_file ${HOST} ${ARG_BACKUP_NAME} ${HOST}-${ARG_BACKUP_NAME}
 		done
-	db-backup)
+		;;
+	db-restore)
 		ARG_BACKUP_NAME=$2
-		if [ -z $ARG_BACKUP_NAME ]; then
-			ARG_BACKUP_NAME="${MYSQL_DB}-$(date +%Y%m%d-%H%M%S).sql"
-			echo "No given backup filename. Using $ARG_BACKUP_NAME"
+		if [ -z ${ARG_BACKUP_NAME} ]; then
+			echo "ERROR: Please specify the name of the backup. e.g.: $0 backup.sql"
+			exit 1
 		fi
 		for HOST in ${HOSTLIST[@]}; do
-			ssh -t ${SSH_USER}${HOST}.routetopa.eu "mysqldump -u${MYSQL_USER} -p${MYSQL_PASS} ${MYSQL_DB} > ${ARG_BACKUP_NAME}"
-			scp ${SSH_USER}${HOST}.routetopa.eu:${ARG_BACKUP_NAME} ./${HOST}-${ARG_BACKUP_NAME}
+			if [ ! -f "${HOST}-${ARG_BACKUP_NAME}" ]; then
+				echo "ERROR: File ${HOST}-${ARG_BACKUP_NAME} does not exists"
+				exit 1
+			fi
+		done
+		for HOST in ${HOSTLIST[@]}; do
+			host_send_file ${HOST} "${HOST}-${ARG_BACKUP_NAME}" "${ARG_BACKUP_NAME}"
+			host_exec_cmd ${HOST} "mysql -u${MYSQL_USER} -p${MYSQL_PASS} ${MYSQL_DB} < ${ARG_BACKUP_NAME}"
 		done
 		;;
+
 	db-sql)
 echo 'NOTE: THIS ACTION HAS NOT BEEN TESTED YET!! JUST ECHOING COMMANDS...'
 		ARG_SCRIPT_NAME=$2
--
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