Merge pull request #7 from danpawlik/openshift-storage

Create LVM on loop device to deploy Openshift Storage

defaults/main.yaml

@@ -32,5 +32,9 @@ standard_user:
   namespace: dev-admin
   role: admin
 
-delete_openshift_storage: true
+delete_openshift_storage: false
+disk_file_path: /mnt/microshift-storage-file
+disk_file_size: 20G
+vg_name: rhel
+
 overwrite_container_policy: false

tasks/main.yaml

@@ -47,6 +47,5 @@
   ansible.builtin.include_tasks: standard-user.yaml
   when: standard_user
 
-- name: Delete openshift storage
+- name: Create lvm or delete openshift storage
   ansible.builtin.include_tasks: openshift-storage.yaml
-  when: delete_openshift_storage

tasks/openshift-storage.yaml

@@ -1,15 +1,69 @@
 ---
-# NOTE: The Openshift storage uses topolvm, that requires additional volume,
-# which is not necessary for us, due we mostly use that playbook for CI.
-- name: Check if openshift-storage namespace exists
-  ansible.builtin.command: oc get namespace openshift-storage
-  register: _openshift_storage_ns
-  failed_when: _openshift_storage_ns.rc not in [0, 1]
-
-- name: Delete openshift storage namespace
-  ansible.builtin.command: oc delete namespace openshift-storage
-  when: _openshift_storage_ns.rc == 0
-
-- name: Delete topolvm-provisioner storageclass
-  ansible.builtin.command: oc delete storageclass topolvm-provisioner
-  when: _openshift_storage_ns.rc == 0
+- name: Delete openshift-storage if needed
+  when: delete_openshift_storage
+  block:
+    # NOTE: The Openshift storage uses topolvm, that requires additional volume,
+    # which is not necessary for us, due we mostly use that playbook for CI.
+    - name: Check if openshift-storage namespace exists
+      ansible.builtin.command: oc get namespace openshift-storage
+      register: _openshift_storage_ns
+      failed_when: _openshift_storage_ns.rc not in [0, 1]
+
+    - name: Delete openshift storage namespace
+      ansible.builtin.command: oc delete namespace openshift-storage
+      when: _openshift_storage_ns.rc == 0
+
+    - name: Delete topolvm-provisioner storageclass
+      ansible.builtin.command: oc delete storageclass topolvm-provisioner
+      when: _openshift_storage_ns.rc == 0
+
+- name: Create LVM on loop device to deploy openshift storage with topolvm
+  when: not delete_openshift_storage
+  block:
+    - name: Check if file already exists
+      become: true
+      stat:
+        path: "{{ disk_file_path }}"
+      register: _disk_file
+
+    - name: Create loop disk
+      when: not _disk_file.stat.exists
+      block:
+        - name: Create empty file
+          become: true
+          community.general.filesize:
+            path: "{{ disk_file_path }}"
+            size: "{{ disk_file_size }}"
+
+        - name: Make partition on empty file
+          become: true
+          community.general.parted:
+            device: "{{ disk_file_path }}"
+            number: 1
+            state: present
+            flags: ["lvm"]
+
+        - name: Get first available loop device
+          become: true
+          ansible.builtin.command: losetup -f
+          register: loop_device
+
+        - name: Create loop device service
+          become: true
+          ansible.builtin.template:
+            src: microshift-loop-device.service.j2
+            dest: /usr/lib/systemd/system/microshift-loop-device.service
+
+        - name: Enable loop device service
+          become: true
+          ansible.builtin.systemd:
+            name: microshift-loop-device
+            state: started
+            enabled: true
+            daemon_reload: true
+
+        - name: Create volume group
+          become: true
+          community.general.lvg:
+            vg: "{{ vg_name }}"
+            pvs: "{{ loop_device.stdout }}"

tasks/pre.yaml

@@ -12,6 +12,7 @@
       - git
       - golang
       - python3-cryptography
+      - lvm2
     state: present
 
 - name: Add host to the hosts file

templates/microshift-loop-device.service.j2

@@ -0,0 +1,16 @@
+[Unit]
+Description=Setup loopback device
+DefaultDependencies=no
+Conflicts=umount.target
+Before=local-fs.target umount.target microshift.service
+
+[Service]
+ExecStart=/sbin/losetup {{ loop_device.stdout }} {{ disk_file_path }}
+ExecStop=/sbin/losetup -d {{ loop_device.stdout }}
+Type=oneshot
+TimeoutSec=60
+RemainAfterExit=yes
+
+[Install]
+WantedBy=local-fs-pre.target
+Also=systemd-udevd.service