[Solved] Doubts about LVM

apaz · 2021-02-12 08:20:52

I don't use LVM in my system so I blacklist its services and set lvm_etad=0 in lvm.conf.
With the new lvm update, the lvm_etad parameter no longer exists.
Has anything changed? The wiki still has the phrase:

Wiki wrote:

The use_lvmetad = 1 must be set in /etc/lvm/lvm.conf. This is the default now - if you have a lvm.conf.pacnew file, you must merge this change.

If you don't want to use LVM is there anything you need to do?

Last edited by apaz (2021-02-16 07:40:53)

Lone_Wolf · 2021-02-15 12:02:01

You probably mean the use_lvmetad parameter ?

I also disable lvm and have use_lvmetad=0 in my /etc/lvm/lvm.conf .
No issues sofar since lvm2 was updated.

frostschutz · 2021-02-15 12:04:05

lvmetad was removed in lvm 2.03 and archlinux updated to that branch so it's gone for good

apaz · 2021-02-16 07:39:10

@Lone_Wolf
Yes, sorry. I really meant "use_lvmetad".

@frostschutz
OK, thanks. So both those who use LVM and those who don't will no longer have to deal with the "lvmetad" parameter. To me that's a good thing.

Do you think it's useful to blacklist lvm2 modules or is it not worth it? In theory I don't like having demons around that I don't use, but in practice I don't think there's any differences.

frostschutz · 2021-02-16 09:10:06

If you don't use it, can't you just uninstall it altogether?

Lone_Wolf · 2021-02-16 11:06:20

frostschutz wrote:

If you don't use it, can't you just uninstall it altogether?

Short answer

$ pactree --reverse --sync lvm2 | wc -l
833
$

removing lvm2 severely limits what programs you can nstall

long answer

$ pactree --reverse --depth 2 --sync lvm2
lvm2
├─archboot
├─libblockdev
│ └─udisks2
├─libguestfs
└─osquery
$

removing or not installing archboot , libguestfs and osquery is doable, but libblockdev / udisks2 is a problem.

$ pactree --reverse --depth 1 --sync udisks2
udisks2
├─calibre
├─cantata
├─deepin-daemon
├─enlightenment
├─gnome-control-center
├─gnome-disk-utility
├─gnome-multi-writer
├─gvfs
├─peony
├─psensor
├─rapid-photo-downloader
├─solid
├─strawberry
├─udiskie
└─udisks2-qt5
$

Solid & gvfs are used by majority of Gnome / KDE environments and applications .

The only viable method to get rid of lvm2 seems to be building libblockdev without lvm2 support or with optional lvm2 support .
No idea if that's doable .

frostschutz · 2021-02-16 11:47:10

Right, sorry, I use LVM everywhere anyway, so I kind of forget about these dependencies :-)

eschwartz · 2021-02-16 12:28:14

I've built a custom libblockdev package without lvm support for a long time.

Index: PKGBUILD
===================================================================
--- PKGBUILD	(revision 407826)
+++ PKGBUILD	(working copy)
@@ -7,8 +7,8 @@
 arch=('x86_64')
 url="https://github.com/rhinstaller/libblockdev"
 license=('LGPL')
-depends=('btrfs-progs' 'dosfstools' 'dmraid' 'gptfdisk' 'libbytesize' 'lvm2' 'mdadm' 'ndctl'
-         'parted' 'volume_key' 'xfsprogs' 'kmod' 'libyaml')
+depends=('btrfs-progs' 'dosfstools' 'gptfdisk' 'libbytesize' 'ndctl'
+         'parted' 'kmod' 'libyaml')
 makedepends=('autoconf-archive' 'gobject-introspection' 'systemd' 'python')
 source=("$pkgname-$pkgver.tar.gz::https://github.com/rhinstaller/libblockdev/archive/$pkgver-1.tar.gz")
 sha512sums=('d78a5a506b2d1c12dc218987ccf422e25ea06b2f71cc4ea39b86d1e23842b29b49832f1dfe6da318a14de94f7e66c0070f3e34443c4feb89e4e8f04c1971aa9e')
@@ -16,7 +16,10 @@
 build() {
   cd "$srcdir"/$pkgname-$pkgver-1
   ./autogen.sh
-  ./configure --prefix=/usr --sysconfdir=/etc --without-lvm_dbus
+  ./configure --prefix=/usr --sysconfdir=/etc --without-lvm_dbus \
+      --without-dm \
+      --without-lvm \
+      --without-crypto
   make
 }
 
@@ -29,3 +32,6 @@
   cd "$srcdir"/$pkgname-$pkgver-1
   make DESTDIR="$pkgdir" install
 }
+
+pkgrel+=".1"
+options+=(strip debug)

Last edited by eschwartz (2021-02-16 12:28:57)

Lone_Wolf · 2021-02-17 09:24:27

Thank you, eschwartz.

lvm2 & thin-provisioning-tools are now removed from my system.

Arch Linux

#1 2021-02-12 08:20:52

[Solved] Doubts about LVM

#2 2021-02-15 12:02:01

Re: [Solved] Doubts about LVM

#3 2021-02-15 12:04:05

Re: [Solved] Doubts about LVM

#4 2021-02-16 07:39:10

Re: [Solved] Doubts about LVM

#5 2021-02-16 09:10:06

Re: [Solved] Doubts about LVM

#6 2021-02-16 11:06:20

Re: [Solved] Doubts about LVM

#7 2021-02-16 11:47:10

Re: [Solved] Doubts about LVM

#8 2021-02-16 12:28:14

Re: [Solved] Doubts about LVM

#9 2021-02-17 09:24:27

Re: [Solved] Doubts about LVM

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