diff options
author | Mark Johnston <markj@FreeBSD.org> | 2022-05-30 14:43:44 +0000 |
---|---|---|
committer | Mark Johnston <markj@FreeBSD.org> | 2022-05-30 14:43:44 +0000 |
commit | 227caacc918a8c9b32608cff42116e7d890b9ddc (patch) | |
tree | 665bd7a199ec32d4e0b90bc89fc133fae8beb656 | |
parent | ef7a6f1dedb7951aa75ec13a87a3f60d410e2380 (diff) | |
download | src-227caacc918a8c9b32608cff42116e7d890b9ddc.tar.gz src-227caacc918a8c9b32608cff42116e7d890b9ddc.zip |
rc: Add a zpoolreguid rc.d script
If one boots up multiple copies of a template VM image containing a
zpool, the pool GUIDs will be identical, making it impossible to, e.g.,
share datasets between them.
This diff introduces a simple workaround for the problem: one can use
the script to, upon first boot, assign a new GUID to one or more zpools.
This will be useful when building ZFS-based VM images from release(7).
Reviewed by: mav, allanjude, asomers
Reviewed by: Pau Amma (docs)
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D35336
-rw-r--r-- | libexec/rc/rc.conf | 2 | ||||
-rw-r--r-- | libexec/rc/rc.d/Makefile | 1 | ||||
-rwxr-xr-x | libexec/rc/rc.d/zpoolreguid | 25 | ||||
-rw-r--r-- | share/man/man5/rc.conf.5 | 8 |
4 files changed, 35 insertions, 1 deletions
diff --git a/libexec/rc/rc.conf b/libexec/rc/rc.conf index a497740eff85..c12377d035d6 100644 --- a/libexec/rc/rc.conf +++ b/libexec/rc/rc.conf @@ -69,6 +69,8 @@ rc_conf_files="/etc/rc.conf /etc/rc.conf.local" zfs_enable="NO" # Set to YES to automatically mount ZFS file systems zfskeys_enable="NO" # Set YES to autoload ZFS encryption keys zfs_bootonce_activate="NO" # Set YES to make successful bootonce BE permanent +zpool_reguid="" # Set to zpools for which the GUID should be replaced + # upon first boot. # ZFSD support zfsd_enable="NO" # Set to YES to automatically start the ZFS fault diff --git a/libexec/rc/rc.d/Makefile b/libexec/rc/rc.d/Makefile index c61d4528bcee..3eabd17df993 100644 --- a/libexec/rc/rc.d/Makefile +++ b/libexec/rc/rc.d/Makefile @@ -326,6 +326,7 @@ ZFS+= zfsbe ZFS+= zfsd ZFS+= zfskeys ZFS+= zpool +ZFS+= zpoolreguid ZFS+= zvol ZFSPACKAGE= rc .endif diff --git a/libexec/rc/rc.d/zpoolreguid b/libexec/rc/rc.d/zpoolreguid new file mode 100755 index 000000000000..83c703d5d6c4 --- /dev/null +++ b/libexec/rc/rc.d/zpoolreguid @@ -0,0 +1,25 @@ +#!/bin/sh + +# PROVIDE: zpoolreguid +# REQUIRE: zpool +# BEFORE: mountcritlocal +# KEYWORD: firstboot nojail + +. /etc/rc.subr + +name="zpoolreguid" +desc="Generate a new zpool GUID" +rcvar="zfs_enable" +start_cmd="zpoolreguid_start" + +zpoolreguid_start() +{ + local pool + + for pool in "${zpool_reguid}"; do + zpool reguid $pool + done +} + +load_rc_config $name +run_rc_command "$1" diff --git a/share/man/man5/rc.conf.5 b/share/man/man5/rc.conf.5 index 01b09b1a59bd..5687fa6bec7c 100644 --- a/share/man/man5/rc.conf.5 +++ b/share/man/man5/rc.conf.5 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd March 3, 2022 +.Dd May 26, 2022 .Dt RC.CONF 5 .Os .Sh NAME @@ -2067,6 +2067,12 @@ If set to .Pa /etc/rc.d/zfs will attempt to automatically mount ZFS file systems and initialize ZFS volumes (ZVOLs). +.It Va zpool_reguid +.Pq Vt str +A space-separated list of ZFS pool names for which new pool GUIDs should be +assigned upon first boot. +This is useful when using a ZFS pool copied from a template, such as a virtual +machine image. .It Va gptboot_enable .Pq Vt bool If set to |