我有一台服务器（运行 OEL/RHEL5 的 hp x86 blade），其 lvm.conf 中配置的 lvm 过滤器存在故障
filter = ["a|^/dev/emcpower.*|", "r/.*/"]
我们还使用 cciss 设备，因此 /dev/cciss 中应该有一个针对它们的 accept 语句。到目前为止，这个疏忽还没有造成问题。“系统”分区（例如 /var、/home 等）不在卷组中，而是在磁盘上。
但是 '/' 挂载和交换空间都配置在 LVM 卷组上，并且 cciss 设备上的物理卷被 lvm 过滤器拒绝。
服务器似乎运行正常但这怎么可能呢？
安装输出
/dev/mapper/VolGroup01-LogVol00 on / type ext3 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/cciss/c0d0p8 on /home type ext3 (rw)
/dev/cciss/c0d0p7 on /opt type ext3 (rw)
/dev/cciss/c0d0p6 on /var type ext3 (rw)
/dev/cciss/c0d0p5 on /tmp type ext3 (rw)
/dev/cciss/c0d0p3 on /usr type ext3 (rw)
/dev/cciss/c0d0p2 on /temp type ext3 (rw)
/dev/cciss/c0d0p1 on /boot type ext3 (rw)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
来自 /etc/fstab
/dev/VolGroup01/LogVol00 / ext3 defaults 1 1
LABEL=/home /home ext3 defaults 1 2
LABEL=/opt /opt ext3 defaults 1 2
LABEL=/var /var ext3 defaults 1 2
LABEL=/tmp /tmp ext3 defaults 1 2
LABEL=/usr /usr ext3 defaults 1 2
LABEL=/temp /temp ext3 defaults 1 2
LABEL=/boot /boot ext3 defaults 1 2
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
/dev/VolGroup01/LogVol01 swap swap defaults 0 0
/dev/VolGroup01/LogVol02 swap swap defaults 0 0
...
按标签排序磁盘
[user@host~]$ ls -al /dev/disk/by-label/
total 0
drwxr-xr-x 2 root root 180 Apr 12 19:23 .
drwxr-xr-x 6 root root 120 Apr 12 19:23 ..
lrwxrwxrwx 1 root root 18 Apr 12 19:23 boot -> ../../cciss/c0d0p1
lrwxrwxrwx 1 root root 18 Apr 12 19:23 home -> ../../cciss/c0d0p8
lrwxrwxrwx 1 root root 18 Apr 12 19:23 opt -> ../../cciss/c0d0p7
lrwxrwxrwx 1 root root 18 Apr 12 19:23 temp -> ../../cciss/c0d0p2
lrwxrwxrwx 1 root root 18 Apr 12 19:23 tmp -> ../../cciss/c0d0p5
lrwxrwxrwx 1 root root 18 Apr 12 19:23 usr -> ../../cciss/c0d0p3
lrwxrwxrwx 1 root root 18 Apr 12 19:23 var -> ../../cciss/c0d0p6
显示
[user@host ~]$ sudo vgdisplay -v VolGroup01
Using volume group(s) on command line
Finding volume group "VolGroup01"
Wiping cache of LVM-capable devices
Volume group "VolGroup01" not found
开发映射器
[user@host ~]$ ls -al /dev/mapper/VolGroup0*
brw------- 1 root root 253, 0 Apr 12 19:23 /dev/mapper/VolGroup01-LogVol00
brw------- 1 root root 253, 1 Apr 12 19:23 /dev/mapper/VolGroup01-LogVol01
brw------- 1 root root 253, 2 Apr 12 19:23 /dev/mapper/VolGroup01-LogVol02
斯瓦彭
[user@host ~]$ swapon -s
Filename Type Size Used Priority
/dev/mapper/VolGroup01-LogVol01 partition 18481144 1860804-1
/dev/mapper/VolGroup01-LogVol02 partition 18874360 0 -2
/etc/lvm/备份/VolGroup01
VolGroup01 {
id = "KtRbKi-wZ8l-rsgg-LyoT-edcO-2Nzo-qsDmaK"
seqno = 4
status = ["RESIZEABLE", "READ", "WRITE"]
flags = []
extent_size = 65536 # 32 Megabytes
max_lv = 0
max_pv = 0
physical_volumes {
pv0 {
id = "H9ludV-lTJK-ivK1-HcUf-G8KR-krD9-TsNJrp"
device = "/dev/cciss/c0d0p9" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 93964122 # 44.8056 Gigabytes
pe_start = 384
pe_count = 1433 # 44.7812 Gigabytes
}
}
logical_volumes {
LogVol00 {
id = "1P5pnt-jFXu-ec4f-NfWC-q9jx-CRGc-33lyPd"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
segment_count = 1
segment1 {
start_extent = 0
extent_count = 125 # 3.90625 Gigabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv0", 0
]
}
}
LogVol01 {
id = "dvqggw-JflJ-KC9Y-QEhw-pejq-GgIv-taDNzj"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
segment_count = 1
segment1 {
start_extent = 0
extent_count = 564 # 17.625 Gigabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv0", 125
]
}
}
LogVol02 {
id = "ZDTUSD-ItMw-xxBK-l1Le-DYX7-J4i3-UYKN4Q"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
segment_count = 1
segment1 {
start_extent = 0
extent_count = 576 # 18 Gigabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv0", 689
]
}
}
}
}
答案1
由于 initrd 有一个较旧的 lvm.conf，没有错误的过滤器，因此 LV 在启动时仍处于挂载状态。新的过滤器将阻止 LVM 命令运行，但不会破坏已挂载的 LV。
当您更新内核时，initrd 将使用您当前的 lvm.conf 进行更新，因此请确保在此之前修复过滤器。