[linux-lvm] How to upgrade LVM2/CLVM to v2.02.180 from old versions

[Gang He]

Hello List,

I want to upgrade LVM2/CLVM to v2.02.180 from v2.02.120, but there are some problems which I want to confirm with you guys.
1) How to migrate /etc/lvm/lvm.conf? since the existing configuration file does not include some new attributes,
could you help to figure out which new key attributes, which should be considered during the upgrade installation?

2) lvmpolld is necessary in LVM2/CLVM v2.02.180? I can find the related files in the installation file list
/sbin/lvmpolld
/usr/lib/systemd/system/lvm2-lvmpolld.service
/usr/lib/systemd/system/lvm2-lvmpolld.socket
this daemon should be enable by default? if we disable this daemon, LVM2/CLVM related features (e.g. pvmove) will be affected, or not?

3) any other places (e.g. configuration files, binary files, features, etc.), which should be considered during the upgrade?

Thanks a lot.
Gang

[Marian Csontos]

Post by Gang He
Hello List,
I want to upgrade LVM2/CLVM to v2.02.180 from v2.02.120, but there are some problems which I want to confirm with you guys.
1) How to migrate /etc/lvm/lvm.conf? since the existing configuration file does not include some new attributes,
could you help to figure out which new key attributes, which should be considered during the upgrade installation?

Have a look at lvmconfig command.

`lvmconfig --type diff`[1] can help you figure out what you changed.

And `lvmconfig --type new --sinceversion 2.02.120`[2] might be what you
are looking for.

[1]: Introduced in 2.02.119 so this should work even on your old
installation.
[2]: New in 2.02.136.

Post by Gang He
2) lvmpolld is necessary in LVM2/CLVM v2.02.180? I can find the related files in the installation file list
/sbin/lvmpolld
/usr/lib/systemd/system/lvm2-lvmpolld.service
/usr/lib/systemd/system/lvm2-lvmpolld.socket
this daemon should be enable by default? if we disable this daemon, LVM2/CLVM related features (e.g. pvmove) will be affected, or not?

pvmove should work mostly fine even without lvmpolld, the testsuite runs
both with and without lvmpolld.

I think the manpage of lvmpolld is good start:

The purpose of lvmpolld is to reduce
the number of spawned background pro‐
cesses per otherwise unique polling
operation. There should be only one.
It also eliminates the possibility of
unsolicited termination of background
process by external factors.

Process receiving SIGHUP was one of the "external factors".

Post by Gang He
3) any other places (e.g. configuration files, binary files, features, etc.), which should be considered during the upgrade?

lvm1 and pool format were removed in 2.02.178. There is a branch adding
them back if you need them - *2018-05-17-put-format1-and-pool-back*. At
least it does apply almost cleanly :-)

-- Martian

Post by Gang He
Thanks a lot.
Gang
_______________________________________________
linux-lvm mailing list
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

[Gang He]

Hello Marian,

Thank for your explanation, it's very helpful to me.

Thanks
Gang

Post by Gang He

Post by Gang He

On 2018/8/3 at 22:05, in message

Hello List,
I want to upgrade LVM2/CLVM to v2.02.180 from v2.02.120, but there are some

problems which I want to confirm with you guys.

Post by Gang He
1) How to migrate /etc/lvm/lvm.conf? since the existing configuration file

does not include some new attributes,

Post by Gang He
could you help to figure out which new key attributes, which should be

considered during the upgrade installation?
Have a look at lvmconfig command.
`lvmconfig --type diff`[1] can help you figure out what you changed.
And `lvmconfig --type new --sinceversion 2.02.120`[2] might be what you
are looking for.
[1]: Introduced in 2.02.119 so this should work even on your old
installation.
[2]: New in 2.02.136.

Post by Gang He
2) lvmpolld is necessary in LVM2/CLVM v2.02.180? I can find the related

files in the installation file list

Post by Gang He
/sbin/lvmpolld
/usr/lib/systemd/system/lvm2-lvmpolld.service
/usr/lib/systemd/system/lvm2-lvmpolld.socket
this daemon should be enable by default? if we disable this daemon,

LVM2/CLVM related features (e.g. pvmove) will be affected, or not?
pvmove should work mostly fine even without lvmpolld, the testsuite runs
both with and without lvmpolld.
The purpose of lvmpolld is to reduce
the number of spawned background pro‐
cesses per otherwise unique polling
operation. There should be only one.
It also eliminates the possibility of
unsolicited termination of background
process by external factors.
Process receiving SIGHUP was one of the "external factors".

Post by Gang He
3) any other places (e.g. configuration files, binary files, features,

etc.), which should be considered during the upgrade?
lvm1 and pool format were removed in 2.02.178. There is a branch adding
them back if you need them - *2018-05-17-put-format1-and-pool-back*. At
least it does apply almost cleanly :-)
-- Martian

Post by Gang He
Thanks a lot.
Gang
_______________________________________________
linux-lvm mailing list
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

_______________________________________________
linux-lvm mailing list
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/