Use zfs-import-scan instead of zfs-import-cache for boot

Switch to the recommended pool import method that uses blkid to scan
for pools instead of relying on zpool.cache. This eliminates the
complexity of managing cachefile paths with altroot during installation.

Changes:
- Remove cachefile setup from create_zfs_pool() and configure_zfs_services()
- Enable zfs-import-scan.service instead of zfs-import-cache.service
- Set cachefile=none on the pool since it's not needed
- Update full-test.sh to verify zfs-import-scan is enabled

This approach is recommended per the Arch Wiki and doesn't require
the cachefile to be present in the initramfs.

1 files changed, 7 insertions, 12 deletions

diff --git a/custom/install-archzfs b/custom/install-archzfs
index e93186d..5c2380a 100755
--- a/custom/install-archzfs
+++ b/custom/install-archzfs
@@ -773,6 +773,7 @@ create_zfs_pool() {
     fi
 
     # Create pool (with or without encryption)
+    # Note: We use zfs-import-scan at boot which doesn't require a cachefile
     if [[ "$NO_ENCRYPT" == "yes" ]]; then
         warn "Creating pool WITHOUT encryption (testing mode)"
         zpool create -f \
@@ -810,13 +811,6 @@ create_zfs_pool() {
     fi
 
     info "ZFS pool created successfully."
-
-    # Set cachefile property - required for initramfs ZFS hook to import pool at boot
-    # Without this, mkinitcpio won't include zpool.cache and boot will fail with
-    # "cannot import '(null)': no such pool available"
-    info "Setting pool cachefile for boot..."
-    zpool set cachefile=/etc/zfs/zpool.cache "$POOL_NAME"
-
     zpool status "$POOL_NAME"
 }
 
@@ -1167,7 +1161,10 @@ configure_zfs_services() {
     step "Configuring ZFS Services"
 
     arch-chroot /mnt systemctl enable zfs.target
-    arch-chroot /mnt systemctl enable zfs-import-cache
+    # Use zfs-import-scan instead of zfs-import-cache
+    # This is the recommended method - it uses blkid to scan for pools
+    # and doesn't require a cachefile
+    arch-chroot /mnt systemctl enable zfs-import-scan
     arch-chroot /mnt systemctl enable zfs-mount
     arch-chroot /mnt systemctl enable zfs-import.target
 
@@ -1175,10 +1172,8 @@ configure_zfs_services() {
     # Note: hostid is generated in configure_bootloader, so it always exists here
     cp /etc/hostid /mnt/etc/hostid
 
-    # Generate zpool cache
-    mkdir -p /mnt/etc/zfs
-    zpool set cachefile=/etc/zfs/zpool.cache "$POOL_NAME"
-    cp /etc/zfs/zpool.cache /mnt/etc/zfs/
+    # Disable cachefile - we use zfs-import-scan which doesn't need it
+    zpool set cachefile=none "$POOL_NAME"
 
     # Set bootfs
     zpool set bootfs="$POOL_NAME/ROOT/default" "$POOL_NAME"