多路徑到暫存 VM 中的邏輯卷

如何在測試 VM 中配置多路徑（目的純粹是學術性的）？

我新建了一個邏輯卷，修改multipath.conf如下：

defaults {
   udev_dir         /dev
   user_friendly_names  yes
}

blacklist {
}

blacklist_exceptions {
   device {
       vendor "VMware,"
       product "VMware Virtual S"
   }
}

並multipath -v3說：

Apr 22 03:22:24 | sdb: rev = 1.0
Apr 22 03:22:24 | sdb: h:b:t:l = 2:0:1:0
Apr 22 03:22:24 | (null): (VMware,:VMware Virtual S) vendor/product whitelisted
Apr 22 03:22:24 | sdb: serial = 
Apr 22 03:22:24 | sdb: get_state
Apr 22 03:22:24 | sdb: path checker = directio (config file default)
Apr 22 03:22:24 | sdb: checker timeout = 180000 ms (sysfs setting)
Apr 22 03:22:24 | sdb: state = running
Apr 22 03:22:24 | directio: starting new request
Apr 22 03:22:24 | directio: io finished 4096/0
Apr 22 03:22:24 | sdb: state = 3
Apr 22 03:22:24 | sdb: getuid = /lib/udev/scsi_id --whitelisted --device=/dev/%n (config file default)
Apr 22 03:22:24 | /lib/udev/scsi_id exitted with 1
Apr 22 03:22:24 | error calling out /lib/udev/scsi_id --whitelisted --device=/dev/sdb
Apr 22 03:22:24 | sdb: state = running
Apr 22 03:22:24 | /lib/udev/scsi_id exitted with 1
Apr 22 03:22:24 | error calling out /lib/udev/scsi_id --whitelisted --device=/dev/sdb
Apr 22 03:22:24 | sdb: detect_prio = 1 (config file default)
Apr 22 03:22:24 | sdb: prio = const (config file default)
Apr 22 03:22:24 | sdb: const prio = 1
Apr 22 03:22:24 | dm-0: device node name blacklisted
Apr 22 03:22:24 | dm-1: device node name blacklisted
Apr 22 03:22:24 | dm-2: device node name blacklisted
===== paths list =====
uuid hcil    dev dev_t pri dm_st chk_st vend/prod/rev            dev_st 
    2:0:0:0 sda 8:0   1   undef ready  VMware,,VMware Virtual S running
    2:0:1:0 sdb 8:16  1   undef ready  VMware,,VMware Virtual S running
[root@localhost ~]# 

我想為邏輯卷配置多路徑/dev/sdb。

我的黑名單是空的，為什麼說dm-0/1/2被列入黑名單？

此外，當我lib/udev/scsi_id --whitelisted --device=/dev手動執行時，我沒有收到任何錯誤。沒有輸出或變化，但……

試試這個

multipathd -k 
show config

在我的系統上，似乎忽略了一個空的黑名單，除了供應商列入黑名單的設備外，它還包含這些 devnodes 模式：

devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^dcssblk[0-9]*"

它匹配“dm-”

您可以嘗試將“dm-1, dm-2 ..” devnodes 添加到黑名單異常中。我從未嘗試過。例如，如果您在多路徑 dm 文件上放置異常，我不知道會產生什麼影響。

引用自：https://unix.stackexchange.com/questions/125929