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带有 Xen 的 Libvirt 无法正确启动 Ubuntu 14.04

tag-icon • tag-icon ubuntu virtualization xen libvirt
带有 Xen 的 Libvirt 无法正确启动 Ubuntu 14.04

此刻我真的感到有点无助：

我尝试使用 Xen 和 libvirt 设置 Ubuntu 14.04 进行管理。我创建了一个虚拟机，但没有自动启动（尽管已选中自动启动）。如果我执行“stop libvirt-bin”和“start libvirt-bin”，虚拟机就会完美启动。

我觉得有点奇怪的是 libvirt-bin 是在 Xen 守护进程之前启动的。

启动日志：

 * Starting configure network device security                            [ OK ]
 * Starting configure network device                                     [ OK ]
 * Starting libvirt daemon                                               [ OK ]
 * Starting Xen daemons                                                                [ OK ]

作为一种解决方法，我将启动/停止命令添加到 rc.local

对此有什么想法吗？起始顺序正确吗？

答案1

这是我的解决方案，您说得对，xen 需要在 libvirt-bin 之前运行。对我来说，问题在于 xen 使用 systemV，而 libvirt-bin 使用 upstart。经过多次争论，我决定必须使用其中一个。

我想确保我没有触碰实际提供的脚本，因为它们可能会不时更新，并且我想确保安全启动和关闭仍然有效。

Upstart 赢了。- 在启动时首先使用以下命令禁用 XEN SystemV 脚本

sudo update-rc.d xen disable
sudo update-rc.d xendomains disable

然后编辑/etc/init/libvirt-bin.conf并修改预启动执行/etc/init.d/xen 启动。它仅在启动时启动一次，并且服务的任何先前重新启动都只会勾选“服务已在运行”响应。

下面的例子

description "libvirt daemon"
author "Dustin Kirkland <[email protected]>"

start on runlevel [2345]
stop on starting rc RUNLEVEL=[016]

expect daemon
respawn

# daemonize
env libvirtd_opts="-d"
# whether libvirtd should run at boot/shutdown
env start_libvirtd="yes"
# by default wait 30 seconds for vms to shut down
env libvirtd_shutdown_timeout=30
# uris for which to shut down vms
env libvirt_uris='qemu:///system lxc:///'

pre-start script
 [ -r /etc/default/libvirt-bin ] && . /etc/default/libvirt-bin
 [ ! "x$start_libvirtd" = "xyes" ] && { stop; exit 0; }
 mkdir -p /var/run/libvirt
 # Clean up a pidfile that might be left around
 rm -f /var/run/libvirtd.pid
 # -----------------------------------
 exec /etc/init.d/xen start
 # -----------------------------------
end script

pre-stop script
 [ -r /etc/default/libvirt-bin ] && . /etc/default/libvirt-bin

 log_msg()
 {
  logf="/var/log/libvirt/shutdownlog.log"
  logger -p daemon.debug -s -t libvirt -- "$@" >> $logf 2>&1
 }

 run_virsh()
 {
  # We parse the output for things like domain state;
  # make sure the output is in the language we expect.
  LANG=C virsh "$@"
 }

 if [ -z "$RUNLEVEL" ]; then
  exit 0
 fi

 if [ "$RUNLEVEL" -ne 0 ] && [ "$RUNLEVEL" -ne 1 ] && [ "$RUNLEVEL" -ne 6 ]; then
  exit 0
 fi
 log_msg "libvirt-bin: entering pre-stop at $(date)"

 for uri in $libvirt_uris; do
  for domain in $(run_virsh -c "$uri" list | awk '$3 == "running" {print $2}'); do
   log_msg "libvirt-bin: attempting clean shutdown of $domain at $(date)"
   run_virsh -c "$uri" shutdown "$domain" >/dev/null
  done
 done

 delay=$libvirtd_shutdown_timeout
 while [ $delay -gt 0 ]; do
  for uri in $libvirt_uris; do
   if ! run_virsh -c "$uri" list | awk '$3 == "running" {exit 1}'; then
    # VMs at this URI are still running. Wait, then
    # start at the beginning looking for running VMs.
    sleep 1
    delay=$(($delay - 1))
    continue 2
   fi
  done
  break
 done

 for uri in $libvirt_uris; do
  for domain in $(run_virsh -c "$uri" list | awk '$3 == "running" {print $2}'); do
   log_msg "destroying $domain"
   run_virsh -c "$uri" destroy "$domain" >/dev/null
  done
 done
 log_msg "libvirt-bin: exiting pre-stop at $(date)"
end script

# /etc/default/libvirt-bin will be deprecated soon.
# If you used to set $libvirtd_opts in /etc/default/libvirt-bin,
# change the 'exec' line here instead.
script
 [ -r /etc/default/libvirt-bin ] && . /etc/default/libvirt-bin
     exec /usr/sbin/libvirtd $libvirtd_opts
end script

就是这样。重启服务器，就可以运行了。

希望这会有所帮助，或者至少为您指明正确的方向。

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