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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/scripts/qemu-guest-agent
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/scripts/qemu-guest-agent')
-rwxr-xr-xqemu/scripts/qemu-guest-agent/fsfreeze-hook33
-rwxr-xr-xqemu/scripts/qemu-guest-agent/fsfreeze-hook.d/mysql-flush.sh.sample56
2 files changed, 89 insertions, 0 deletions
diff --git a/qemu/scripts/qemu-guest-agent/fsfreeze-hook b/qemu/scripts/qemu-guest-agent/fsfreeze-hook
new file mode 100755
index 000000000..c27b29f28
--- /dev/null
+++ b/qemu/scripts/qemu-guest-agent/fsfreeze-hook
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+# This script is executed when a guest agent receives fsfreeze-freeze and
+# fsfreeze-thaw command, if it is specified in --fsfreeze-hook (-F)
+# option of qemu-ga or placed in default path (/etc/qemu/fsfreeze-hook).
+# When the agent receives fsfreeze-freeze request, this script is issued with
+# "freeze" argument before the filesystem is frozen. And for fsfreeze-thaw
+# request, it is issued with "thaw" argument after filesystem is thawed.
+
+LOGFILE=/var/log/qga-fsfreeze-hook.log
+FSFREEZE_D=$(dirname -- "$0")/fsfreeze-hook.d
+
+# Check whether file $1 is a backup or rpm-generated file and should be ignored
+is_ignored_file() {
+ case "$1" in
+ *~ | *.bak | *.orig | *.rpmnew | *.rpmorig | *.rpmsave | *.sample)
+ return 0 ;;
+ esac
+ return 1
+}
+
+# Iterate executables in directory "fsfreeze-hook.d" with the specified args
+[ ! -d "$FSFREEZE_D" ] && exit 0
+for file in "$FSFREEZE_D"/* ; do
+ is_ignored_file "$file" && continue
+ [ -x "$file" ] || continue
+ printf "$(date): execute $file $@\n" >>$LOGFILE
+ "$file" "$@" >>$LOGFILE 2>&1
+ STATUS=$?
+ printf "$(date): $file finished with status=$STATUS\n" >>$LOGFILE
+done
+
+exit 0
diff --git a/qemu/scripts/qemu-guest-agent/fsfreeze-hook.d/mysql-flush.sh.sample b/qemu/scripts/qemu-guest-agent/fsfreeze-hook.d/mysql-flush.sh.sample
new file mode 100755
index 000000000..2b4fa3aeb
--- /dev/null
+++ b/qemu/scripts/qemu-guest-agent/fsfreeze-hook.d/mysql-flush.sh.sample
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+# Flush MySQL tables to the disk before the filesystem is frozen.
+# At the same time, this keeps a read lock in order to avoid write accesses
+# from the other clients until the filesystem is thawed.
+
+MYSQL="/usr/bin/mysql"
+MYSQL_OPTS="-uroot" #"-prootpassword"
+FIFO=/var/run/mysql-flush.fifo
+
+# Check mysql is installed and the server running
+[ -x "$MYSQL" ] && "$MYSQL" $MYSQL_OPTS < /dev/null || exit 0
+
+flush_and_wait() {
+ printf "FLUSH TABLES WITH READ LOCK \\G\n"
+ trap 'printf "$(date): $0 is killed\n">&2' HUP INT QUIT ALRM TERM
+ read < $FIFO
+ printf "UNLOCK TABLES \\G\n"
+ rm -f $FIFO
+}
+
+case "$1" in
+ freeze)
+ mkfifo $FIFO || exit 1
+ flush_and_wait | "$MYSQL" $MYSQL_OPTS &
+ # wait until every block is flushed
+ while [ "$(echo 'SHOW STATUS LIKE "Key_blocks_not_flushed"' |\
+ "$MYSQL" $MYSQL_OPTS | tail -1 | cut -f 2)" -gt 0 ]; do
+ sleep 1
+ done
+ # for InnoDB, wait until every log is flushed
+ INNODB_STATUS=$(mktemp /tmp/mysql-flush.XXXXXX)
+ [ $? -ne 0 ] && exit 2
+ trap "rm -f $INNODB_STATUS; exit 1" HUP INT QUIT ALRM TERM
+ while :; do
+ printf "SHOW ENGINE INNODB STATUS \\G" |\
+ "$MYSQL" $MYSQL_OPTS > $INNODB_STATUS
+ LOG_CURRENT=$(grep 'Log sequence number' $INNODB_STATUS |\
+ tr -s ' ' | cut -d' ' -f4)
+ LOG_FLUSHED=$(grep 'Log flushed up to' $INNODB_STATUS |\
+ tr -s ' ' | cut -d' ' -f5)
+ [ "$LOG_CURRENT" = "$LOG_FLUSHED" ] && break
+ sleep 1
+ done
+ rm -f $INNODB_STATUS
+ ;;
+
+ thaw)
+ [ ! -p $FIFO ] && exit 1
+ echo > $FIFO
+ ;;
+
+ *)
+ exit 1
+ ;;
+esac