[lvm-devel] Question: build and install LVM2 on Centos7

[Leo Yan]

Hi there,

When built and installed LVM2 (with tag v2_02_187) on Centos7, I used
below commands:

  # ./configure --prefix=/usr --includedir=/include --mandir=/share/man \
    --infodir=/share/info --sysconfdir=/etc --localstatedir=/var \
    --disable-silent-rules --sbindir=/sbin --enable-blkid_wiping \
    --enable-cmdlib --enable-dmeventd --enable-dbus-service \
    --enable-lvmlockd-sanlock --enable-lvmpolld --enable-notify-dbus \
    --enable-pkgconfig --enable-readline --enable-udev_rules \
    --enable-udev_sync --with-thin-check=/usr/sbin/thin_check \
    --with-thin-dump=/usr/sbin/thin_dump \
    --with-thin-repair=/usr/sbin/thin_repair \
    --with-cache=internal --with-thin=internal
  # make
  # make install

I found the libs will be installed into /usr/lib/ rather than into
/usr/lib64:

  # make V=1 install | grep "\/usr\/lib"
  /usr/bin/install -c -m 555  -D libdevmapper-event-lvm2.so /usr/lib/libdevmapper-event-lvm2.so.2.02                         
  /usr/bin/install -c -m 755 -d /usr/lib
  ln -s -f libdevmapper-event-lvm2.so.2.02 /usr/lib/libdevmapper-event-lvm2.so                                               
  /usr/bin/install -c -m 555  -D libdevmapper-event-lvm2snapshot.so /usr/lib/device-mapper/libdevmapper-event-lvm2snapshot.so
  ln -s -f device-mapper/libdevmapper-event-lvm2snapshot.so /usr/lib/libdevmapper-event-lvm2snapshot.so                      
  /usr/bin/install -c -m 555  -D libdevmapper-event-lvm2raid.so /usr/lib/device-mapper/libdevmapper-event-lvm2raid.so        
  ln -s -f device-mapper/libdevmapper-event-lvm2raid.so /usr/lib/libdevmapper-event-lvm2raid.so                              
  /usr/bin/install -c -m 555  -D libdevmapper-event-lvm2thin.so /usr/lib/device-mapper/libdevmapper-event-lvm2thin.so        
  ln -s -f device-mapper/libdevmapper-event-lvm2thin.so /usr/lib/libdevmapper-event-lvm2thin.so                              
  /usr/bin/install -c -m 555  -D libdevmapper-event-lvm2mirror.so /usr/lib/device-mapper/libdevmapper-event-lvm2mirror.so    
  ln -s -f device-mapper/libdevmapper-event-lvm2mirror.so /usr/lib/libdevmapper-event-lvm2mirror.so                          
  /usr/bin/install -c -m 555  -D libdevmapper-event-lvm2vdo.so /usr/lib/device-mapper/libdevmapper-event-lvm2vdo.so          
  ln -s -f device-mapper/libdevmapper-event-lvm2vdo.so /usr/lib/libdevmapper-event-lvm2vdo.so                                
  /usr/bin/install -c -m 555  -D libdevmapper-event.so /usr/lib/libdevmapper-event.so.1.02                                   

  [...]

So at the end, if my Centos7's rootFS is logical volumes, this will
lead to booting failure.  The reason is at the booting time, the lvm
tool (should also include dmeventd) have been updated with myself built
binaries, the default lib path should be /usr/lib64 but not the folder
/usr/lib, so the upgraded binaries cannot find the appropriate libs.
This is why we rescured the system by copying libdevmapper related libs
from /usr/lib to /usr/lib64.

I can manually copy libs from /usr/lib to /usr/lib64 for libdevmapper-*,
but seems to me this is not the formal way to do.  My question is how I
can smoothly upgrade self built LVM tools on Centos7?

Thanks,
Leo