我正在 FreeBSD 下编写一个脚本来备份所有正在运行的 bhyve 虚拟机。目标是识别所有正在运行的虚拟机,逐一停止,等待其 PID 完成、备份并重新启动。
我知道我可以从 shell 命令vm list
并获取:
root@mellonas:/ # vm list
NAME DATASTORE LOADER CPU MEMORY VNC AUTOSTART STATE
dockers default grub 2 4096M - No Stopped
freebsd default bhyveload 1 256M - No Stopped
guacamole default grub 1 512M - No Stopped
mediaserver default grub 4 3048M - Yes [2] Running (2046)
mx-server default grub 1 1024M - Yes [3] Running (2609)
nextcloud default bhyveload 1 1024M - Yes [4] Running (2783)
pf default bhyveload 2 1512M - Yes [1] Running (1766)
zm default grub 4 2548M - Yes [5] Running (2957)
由于我没有脚本编码经验,因此我在下面编写了此脚本,该脚本需要手动更新虚拟机列表以添加/删除新的虚拟机列表:
#!/bin/sh
#
#
# Variables
now=$(date +"%Y-%m-%d_%H:%M:%S") # Run date
maindir=/raid/vm/ # bhyve VM's directory
vmbkpdir=/raid/cifs/vmbackups/$now # Back-up directory
log_file=$maindir"/vmcopy.log" # Log file
vm_list="pf mediaserver mx-server nextcloud zm" # List of VMs to back-up
#
# Process log entries
log()
{
timestamp=$(date +"[%Y-%m-%d %H:%M:%S]")
parm="$1"
if [ -e $log_file ];
then
echo "$timestamp copy bhyve VMs: $parm" >> $log_file
else
echo "$timestamp copy bhyve VMs: Log file created" > $log_file
echo "$timestamp copy bhyve VMs: $parm" >> $log_file
fi
}
#
# Process VM back-up
save()
{
vm=$1
vmdir=$maindir$vm
log "vm directory $vmdir"
log "Stopping $vm"
vm stop $vm
sleep 60
cd $vmbkpdir
log "Creating tar ball"
tar -zcvf $vm.tar.gz $vmdir # Change to zfs snapshot if desired
log "Restarting vm"
vm start $vm
log "*** Copy completed ***"
}
#
# Main
log "*** Script started ***"
log "vm backup directory $vmbkpdir"
log "Creating back-up directory"
mkdir $vmbkpdir
for vms in $vm_list; do # Loop through VMs
log "${vms}"
save "${vms}"
done
log "*** End of script ***"
我想:
从输出中捕获 VM 列表虚拟机列表
捕获正在运行的虚拟机进行处理(停止、等待 PID、备份、重新启动)
答案1
你的第二个问题不明确。问题1很简单。这将获取相关的进程 ID:
PIDS=`vm list | grep ' Running ' | sed -e 's;.* Running ;;' | tr -d '()'`
echo $PIDS
for PID in $PIDS; do ps wwup $PID; done