arch installation mostly works with zfsbootmgr

roles/base/tasks/archinstall/prepare_chroot.yaml

@@ -0,0 +1,30 @@
+---
+- name: Mount arch zroot
+  command: zfs mount zroot/ROOT/arch
+
+- name: Mount all other zroot mountpoints
+  command: zfs mount -a
+
+- name: Create zroot destination directories
+  ansible.builtin.file:
+    path: "/mnt{{ item }}"
+    state: directory
+  loop:
+    - /etc/zfs
+    - /boot/efi
+
+- name: Mount EFI
+  ansible.posix.mount:
+    path: /mnt/boot/efi
+    src: "{{ base_efi_partitions | first }}"
+    fstype: vfat
+    state: mounted
+
+- name: zfs | set zroot bootfs to arch
+  command: zpool set bootfs=zroot/ROOT/arch zroot
+
+- name: zfs | set cachefile
+  command: zpool set cachefile=/etc/zfs/zpool.cache zroot
+
+- name: zfs | copy cache file to chroot
+  command: cp /etc/zfs/zpool.cache /mnt/etc/zfs