[PATCH v1 12/13] volume_group: Create a volume group on OCI nodes

[cel@kernel.org]

From: Chuck Lever <chuck.lever@oracle.com>

On storage nodes (eg., nfsd, iscsi, smbd), pick up the extra block
volumes, avoiding the root and data devices, and toss them into an
volume group to use for shared storage.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 .../volume_group/tasks/terraform/oci.yml      | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 playbooks/roles/volume_group/tasks/terraform/oci.yml

diff --git a/playbooks/roles/volume_group/tasks/terraform/oci.yml b/playbooks/roles/volume_group/tasks/terraform/oci.yml
new file mode 100644
index 000000000000..219e3d7edbfd
--- /dev/null
+++ b/playbooks/roles/volume_group/tasks/terraform/oci.yml
@@ -0,0 +1,38 @@
+---
+#
+# To guarantee idempotency, these steps have to generate the exact
+# same physical_volumes list every time they are run.
+#
+# Skip the block device on which the root filesystem resides, and
+# skip the device that is to be used for /data. These devices all
+# show up under /dev/oracleoci/ .
+#
+
+- name: Detect the root device
+  ansible.builtin.stat:
+    path: "/dev/oracleoci/oraclevda"
+  register: stat_output
+
+- name: Save the name of the root device
+  ansible.builtin.set_fact:
+    instance_root_device: "{{ stat_output.stat.lnk_source.split('/dev/').1 }}"
+
+- name: Detect the data device
+  ansible.builtin.stat:
+    path: "{{ data_device }}"
+  register: stat_output
+
+- name: Save the name of the data device
+  ansible.builtin.set_fact:
+    instance_data_device: "{{ stat_output.stat.lnk_source.split('/dev/').1 }}"
+
+- name: Add unused extra volumes to the volume list
+  ansible.builtin.set_fact:
+    physical_volumes: "{{ physical_volumes + ['/dev/' + item.key] }}"
+  when:
+    - item.value.model == "BlockVolume"
+    - item.key != instance_root_device
+    - item.key != instance_data_device
+  loop_control:
+    label: "Adding block device: /dev/{{ item.key }}"
+  with_dict: "{{ ansible_devices }}"
-- 
2.48.1