Add datastore role for validating config of datastore setup

roles/datastore/tasks/gluster.yaml

@@ -0,0 +1,45 @@
+---
+- name: Allow gluster through firewall
+  become: true
+  ansible.posix.firewalld:
+    service: glusterfs
+    state: enabled
+    zone: trusted
+    immediate: true
+    permanent: true
+
+- name: Create datastore directory
+  become: true
+  ansible.builtin.file:
+    path: /mnt/brick/datastore
+    state: directory
+
+- name: Fetch peer status
+  become: true
+  ansible.builtin.command:
+    cmd: gluster peer status
+  changed_when: false
+  register: _gluster_peer_status_raw
+
+- name: Check peer status
+  ansible.builtin.assert:
+    that:
+      - not _gluster_peer_status_raw.stdout_lines[0].strip().endswith('0')
+    fail_msg: >-
+      ERROR: Datastore host '{{ inventory_hostname }}' is not joined to the gluster pool. Run the
+      command 'gluster peer probe {{ inventory_hostname }}.local' from another datastore host to
+      add it.
+    success_msg: >-
+      Datastore host {{ inventory_hostname }} is joined to the gluster pool
+
+- name: Mount gluster volume
+  become: true
+  ansible.posix.mount:
+    path: /mnt/datastore
+    src: localhost:/datastore
+    state: mounted
+    fstype: glusterfs
+    # Note that this just needs to be any path *other* than the actual
+    # fstab. This is done just to prevent the devices from being
+    # automatically mounted at boot
+    fstab: "{{ skylab_state_dir }}/mounts"