KVM、libvirt和LVs在LVs中

Question

我有一个运行KVM+libvirt的Debian服务器。VM磁盘是主机上的LV。问题是，如果我在客户机中创建LV，就会在主机上递归地检测到它们，这会造成各种问题，比如无法适当调整或删除LV。

因此，我在/etc/lvm/lvm.conf中添加了一个过滤器规则，以排除在其他LV中扫描LV：

filter = [ "r|/dev/dm-*|", "a|/dev/sd.*|" ]

现在，我的问题是:如何让LVM只重新扫描“真正的”VGs和LVs？我现在有这样的错误：

# lvs
  WARNING: Device for PV 73C0Ma-sAYV-Aa10-pAHB-ZAZA-3QjH-Rk1eTS not found or rejected by a filter.
  WARNING: Device for PV fcEG5k-BLzO-dbAr-Yw8o-dPw2-1hAk-VyluvW not found or rejected by a filter.
  LV              VG              Attr       LSize    Pool Origin    Data%  Meta%  Move Log Cpy%Sync Convert
  HaProxy         data            -wi-ao----   20,00g                                                       
  backup          data            -wi-ao----    4,00t                                                       
  database        data            -wi-ao----   16,00g                                                       
  lvol0           data            swi-a-s---   16,07g      stone-web 70,43                                  
  stone-vtls      data            -wi-ao----    2,00t                                                       
  stone-web       data            owi-aos---   16,00g                                                       
  lv0             ftpstorage      -wi-----p-   10,00t                                                       

本例中的最后一个lv实际上是VM的LV，而不是主机的LV.我如何在不重启主机的情况下摆脱它？

Answer 1

根据pvscan手册页和RHEL文档，以下内容应该可以工作: /etc/lvm/lvm.conf

global_filter = [ "r|/dev/dm-*|", "a|/dev/sd.*|" ]

pvscan --cache

https://www.systutorials.com/docs/linux/man/8-pvscan/

To prevent devices from being scanned by pvscan --cache,
add them to lvm.conf(5) devices/global_filter.
The devices/filter setting does not apply to system level
scanning. For more information, see:
    lvmconfig --withcomments devices/global_filter 

https://access.redhat.com/documentation/en-us/red_帽子_企业_linux/7/html/逻辑_体积_经理_行政/lvm_过滤器