[pve-devel] [PATCH installer v3 4/4] low-level: install: check for already-existing `rpool` on install
Christoph Heiss
c.heiss at proxmox.com
Thu Jul 11 13:57:56 CEST 2024
.. much in the same manner as the detection for LVM works.
zpools can only be renamed by importing them with a new name, so
unfortunately the import-export dance is needed.
Signed-off-by: Christoph Heiss <c.heiss at proxmox.com>
---
Changes v2 -> v3:
* skip rename prompt in auto-install mode
Changes v1 -> v2:
* use unique pool id for renaming instead of generating random id
ourselves
* moved renaming functionality to own subroutine in new
Proxmox::Sys::ZFS module
Proxmox/Install.pm | 33 +++++++++++++++++++++++++++++++++
Proxmox/Sys/ZFS.pm | 20 ++++++++++++++++++--
2 files changed, 51 insertions(+), 2 deletions(-)
diff --git a/Proxmox/Install.pm b/Proxmox/Install.pm
index 7342e4b..ba699fa 100644
--- a/Proxmox/Install.pm
+++ b/Proxmox/Install.pm
@@ -16,6 +16,7 @@ use Proxmox::Install::StorageConfig;
use Proxmox::Sys::Block qw(get_cached_disks wipe_disk partition_bootable_disk);
use Proxmox::Sys::Command qw(run_command syscmd);
use Proxmox::Sys::File qw(file_read_firstline file_write_all);
+use Proxmox::Sys::ZFS;
use Proxmox::UI;
# TODO: move somewhere better?
@@ -169,9 +170,41 @@ sub btrfs_create {
syscmd($cmd);
}
+sub zfs_ask_existing_zpool_rename {
+ my ($pool_name) = @_;
+
+ # At this point, no pools should be imported/active
+ my $exported_pools = Proxmox::Sys::ZFS::get_exported_pools();
+
+ foreach (@$exported_pools) {
+ next if $_->{name} ne $pool_name || $_->{state} ne 'ONLINE';
+ my $renamed_pool = "$_->{name}-OLD-$_->{id}";
+
+ my $response_ok = Proxmox::Install::Config::get_existing_storage_auto_rename();
+ if (!$response_ok) {
+ $response_ok = Proxmox::UI::prompt(
+ "A ZFS pool named '$_->{name}' (id $_->{id}) already exists on the system.\n\n" .
+ "Do you want to rename the pool to '$renamed_pool' before continuing " .
+ "or cancel the installation?"
+ );
+ }
+
+ # Import the pool using its id, as that is unique and works even if there are
+ # multiple zpools with the same name.
+ if ($response_ok) {
+ Proxmox::Sys::ZFS::rename_pool($_->{id}, $renamed_pool);
+ } else {
+ warn "Canceled installation as requested by user, due to already existing ZFS pool '$pool_name'\n";
+ die "\n"; # causes abort without re-showing an error dialogue
+ }
+ }
+}
+
sub zfs_create_rpool {
my ($vdev, $pool_name, $root_volume_name) = @_;
+ zfs_ask_existing_zpool_rename($pool_name);
+
my $iso_env = Proxmox::Install::ISOEnv::get();
my $zfs_opts = Proxmox::Install::Config::get_zfs_opt();
diff --git a/Proxmox/Sys/ZFS.pm b/Proxmox/Sys/ZFS.pm
index 9232d1a..c5a807e 100644
--- a/Proxmox/Sys/ZFS.pm
+++ b/Proxmox/Sys/ZFS.pm
@@ -3,10 +3,10 @@ package Proxmox::Sys::ZFS;
use strict;
use warnings;
-use Proxmox::Sys::Command qw(run_command);
+use Proxmox::Sys::Command qw(run_command syscmd);
use base qw(Exporter);
-our @EXPORT_OK = qw(get_exported_pools);
+our @EXPORT_OK = qw(get_exported_pools rename_pool);
# Parses the output of running `zpool import`, which shows all importable
# ZFS pools.
@@ -90,4 +90,20 @@ sub get_exported_pools {
return zpool_import_parse_output($fh);
}
+# Renames a importable ZFS pool by importing it with a new name and then
+# exporting again.
+#
+# Arguments:
+#
+# $poolid - Unique, numeric identifier of the pool to rename
+# $new_name - New name for the pool
+sub rename_pool {
+ my ($poolid, $new_name) = @_;
+
+ syscmd("zpool import -f $poolid $new_name") == 0 ||
+ die "failed to import zfs pool with id '$poolid' with new name '$new_name'\n";
+ syscmd("zpool export $new_name") == 0 ||
+ warn "failed to export renamed zfs pool '$new_name'\n";
+}
+
1;
--
2.45.1
More information about the pve-devel
mailing list