expanded zfs role

globals.yaml

@@ -1,5 +1,8 @@
 ---
-zfs_glob: /dev/disk/by-id/*HC_Volume*
+zfs_disk: /dev/sdb
+zfs_arc_size_mb: "{{ (ansible_memtotal_mb * 0.75)|int|abs }}"
+zfs_arc_size_bytes: "{{ zfs_arc_size_mb }}000000"
+pwgen: "{{ lookup('password', '/dev/null chars=ascii_letters,digits,hexdigits,punctuation length=32') }}"
 common_pkgs:
   - bash-completion
   - htop
@@ -10,6 +13,3 @@ common_pkgs:
   - sysbench
   - fio
   - rsync
-arc_size_mb: "{{ (ansible_memtotal_mb * 0.75)|int|abs }}"
-arc_size_bytes: "{{ arc_size_mb }}000000"
-pwgen: "{{ lookup('password', '/dev/null chars=ascii_letters,digits,hexdigits,punctuation length=32') }}"

roles/zfs/tasks/main.yml

@@ -1,5 +1,16 @@
 ---
 
+# temporarily added to test zfs role by itself
+#- name: check if atomic
+#  stat:
+#    path: /run/ostree-booted
+#  register: ostree
+#
+#- name: set fact (atomic state)
+#  set_fact:
+#    is_atomic: "{{ ostree.stat.exists }}"
+# end temp additions
+
 - name: install zfs-release package (RHEL/CentOS)
   yum:
     name: "http://download.zfsonlinux.org/epel/zfs-release.el7_5.noarch.rpm"
@@ -34,11 +45,24 @@
     dest: "/etc/modules-load.d/zfs.conf"
     content: |
       zfs
+  register: zfsload
 
-#- name: set zfs_arc_max to 75% installed memory ({{ arc_size_bytes }} bytes)
+# does not adjust to 75% of each host, depends on consistency between hosts - inconsistency leads to disproportionate allocations
+#- name: set zfs_arc_max to 75% installed memory ({{ zfs_arc_size_bytes }} bytes)
 #  lineinfile:
 #    path: "/etc/modprobe.d/zfs.conf"
 #    regexp: '^options zfs zfs_arc_max='
-#    line: 'options zfs zfs_arc_max="{{ arc_size_bytes }}"'
+#    line: 'options zfs zfs_arc_max="{{ zfs_arc_size_bytes }}"'
 #    create: yes
-#    commented out, does not adjust to 75% of each host, leading to disproportionate allocations
+
+- name: import pools
+  command: "zpool import -a"
+  register: pools
+  changed_when: "pools.stderr != 'no pools available to import'"
+
+- zpool_facts: properties='all'
+
+# really bad idempotence in here...
+- name: create zpool
+  command: "zpool create -f -O compression=lz4 data {{ zfs_disk }} -o ashift=13 -O secondarycache=all"
+  when: ansible_zfs_pools is not defined