Adds sample scripts for --fsfreeze-script option of qemu-ga.
-fsfreeze.sh: iterates and execute scripts in fsfreeze.d/
-fsfreeze.d/mysql-flush.sh: quiesce MySQL before snapshot
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama...@hitachi.com>
---
.gitignore | 1 +
.../fsfreeze.d/mysql-flush.sh | 41 ++++++++++++++++++++++
.../fsfreeze-script-sample/fsfreeze.sh | 17 +++++++++
3 files changed, 59 insertions(+)
create mode 100755
docs/qemu-guest-agent/fsfreeze-script-sample/fsfreeze.d/mysql-flush.sh
create mode 100755 docs/qemu-guest-agent/fsfreeze-script-sample/fsfreeze.sh
diff --git a/.gitignore b/.gitignore
index bd6ba1c..867cb86 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,6 +68,7 @@ fsdev/virtfs-proxy-helper.pod
*.tp
*.vr
*.d
+!fsfreeze.d
*.o
*.lo
*.la
diff --git
a/docs/qemu-guest-agent/fsfreeze-script-sample/fsfreeze.d/mysql-flush.sh
b/docs/qemu-guest-agent/fsfreeze-script-sample/fsfreeze.d/mysql-flush.sh
new file mode 100755
index 0000000..1704fb0
--- /dev/null
+++ b/docs/qemu-guest-agent/fsfreeze-script-sample/fsfreeze.d/mysql-flush.sh
@@ -0,0 +1,41 @@
+#!/bin/bash
+MYSQL="mysql -uroot" #"-prootpassword"
+FIFO=/tmp/mysql-flush.fifo
+
+flush_and_wait() {
+ echo 'FLUSH TABLES WITH READ LOCK \G'
+ read < $FIFO
+ echo 'UNLOCK TABLES \G'
+}
+
+if [ "$1" = "freeze" ]; then
+
+ mkfifo $FIFO
+ flush_and_wait | $MYSQL &
+ # wait until every block is flushed
+ while [ "`echo 'SHOW STATUS LIKE "Key_blocks_not_flushed"' |\
+ $MYSQL | tail -1 | cut -f 2`" -gt 0 ]; do
+ sleep 1
+ done
+ # for InnoDB, wait until every log is flushed
+ while :; do
+ INNODB_STATUS=/tmp/mysql-innodb.status
+ echo 'SHOW ENGINE INNODB STATUS \G' | $MYSQL > $INNODB_STATUS
+ LOG_CURRENT=`grep 'Log sequence number' $INNODB_STATUS |\
+ tr -s " " | cut -d' ' -f4`
+ LOG_FLUSHED=`grep 'Log flushed up to' $INNODB_STATUS |\
+ tr -s " " | cut -d' ' -f5`
+ rm $INNODB_STATUS
+ [ $LOG_CURRENT = $LOG_FLUSHED ] && break
+ sleep 1
+ done
+
+elif [ "$1" = "thaw" ]; then
+
+ if [ -p $FIFO ]; then
+ echo > $FIFO
+ rm $FIFO
+ fi
+
+fi
+
diff --git a/docs/qemu-guest-agent/fsfreeze-script-sample/fsfreeze.sh
b/docs/qemu-guest-agent/fsfreeze-script-sample/fsfreeze.sh
new file mode 100755
index 0000000..b402107
--- /dev/null
+++ b/docs/qemu-guest-agent/fsfreeze-script-sample/fsfreeze.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# This script is executed when a guest agent receives fsfreeze-freeze and
+# fsfreeze-thaw command when it is specified in --fsfreeze-script/-F option
+# of qemu-ga or placed in default path (/etc/qemu/fsfreeze-script.sh).
+# When the agent receives fsfreeze-freeze command, the script is issued with
+# "freeze" argument before the filesystem is freezed.. And for fsfreeze-thaw,
+# it is issued with "thaw" argument after filesystem is thawed.
+#
+# This script iterates executables in directory "fsfreeze.d" with the
+# specified argument.
+
+cd `dirname $0`
+cd fsfreeze.d
+for x in *; do
+ [ -x ./$x ] && ./$x $1
+done
--
1.7.11.7
