85978dfb6b
Make sure the error log of fsfreeze hooks when freeze/thaw/snapshot could be logged to system logs if the default logfile of qga can't be written or other situations Signed-off-by: Dehan Meng <demeng@redhat.com> Reviewed-by: Yan Vugenfirer <yvugenfi@redhat.com> Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com> Message-ID: <20241225083744.277374-1-demeng@redhat.com> Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
62 lines
1.9 KiB
Bash
Executable File
62 lines
1.9 KiB
Bash
Executable File
#!/bin/sh
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# This script is executed when a guest agent receives fsfreeze-freeze and
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# fsfreeze-thaw command, if it is specified in --fsfreeze-hook (-F)
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# option of qemu-ga or placed in default path (/etc/qemu/fsfreeze-hook).
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# When the agent receives fsfreeze-freeze request, this script is issued with
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# "freeze" argument before the filesystem is frozen. And for fsfreeze-thaw
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# request, it is issued with "thaw" argument after filesystem is thawed.
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LOGFILE=/var/log/qga-fsfreeze-hook.log
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FSFREEZE_D=$(dirname -- "$0")/fsfreeze-hook.d
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# Check whether file $1 is a backup or rpm-generated file and should be ignored
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is_ignored_file() {
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case "$1" in
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*~ | *.bak | *.orig | *.rpmnew | *.rpmorig | *.rpmsave | *.sample | *.dpkg-old | *.dpkg-new | *.dpkg-tmp | *.dpkg-dist | *.dpkg-bak | *.dpkg-backup | *.dpkg-remove)
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return 0 ;;
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esac
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return 1
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}
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USE_SYSLOG=0
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# if log file is not writable, fallback to syslog
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[ ! -w "$LOGFILE" ] && USE_SYSLOG=1
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# try to update log file and fallback to syslog if it fails
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touch "$LOGFILE" &>/dev/null || USE_SYSLOG=1
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# Ensure the log file is writable, fallback to syslog if not
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log_message() {
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local message="$1"
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if [ "$USE_SYSLOG" -eq 0 ]; then
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printf "%s: %s\n" "$(date)" "$message" >>"$LOGFILE"
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else
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logger -t qemu-ga-freeze-hook "$message"
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fi
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}
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# Iterate executables in directory "fsfreeze-hook.d" with the specified args
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[ ! -d "$FSFREEZE_D" ] && exit 0
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for file in "$FSFREEZE_D"/* ; do
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is_ignored_file "$file" && continue
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[ -x "$file" ] || continue
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log_message "Executing $file $@"
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if [ "$USE_SYSLOG" -eq 0 ]; then
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"$file" "$@" >>"$LOGFILE" 2>&1
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STATUS=$?
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else
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"$file" "$@" 2>&1 | logger -t qemu-ga-freeze-hook
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STATUS=${PIPESTATUS[0]}
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fi
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if [ $STATUS -ne 0 ]; then
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log_message "Error: $file finished with status=$STATUS"
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else
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log_message "$file finished successfully"
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fi
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done
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exit 0
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