Re-add local copy of infra.lvm_snapshots so we can better tailor the lab experience
This commit is contained in:
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# Testing the LVM Snapshot Role
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## Prerequisites
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- All the tests are in the form of ansible playbooks.
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- All playbooks expect that the target machine will have a secondary storage device to be used for testing.
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## Variables
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The variables may be passed as part of the inventory or using a separate file.
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```yaml
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device: < device node without `/dev`. e.g. vdb >
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```
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## Ansible Configuration
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In order to run the tests from the repo without having to install them,
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the tests directory includes an [ansible.cfg](./ansible.cfg) file.
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Make sure to point to it when running the test playbook
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## Running a test
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### Inventory file
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In this example, the `device` parameter is passed in the `inventory.yml` file
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```yaml
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all:
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hosts:
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<FQDN of test machine>:
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device: vdb
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```
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### Command line
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Running the [snapshot revert playbook](./test-revert-playbook.yml) test from the repo
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```bash
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ANSIBLE_CONFIG=./tests/ansible.cfg ansible-playbook -K -i inventory.yml tests/test-revert-playbook.yml
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```
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[defaults]
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roles_path=~/.ansible/roles:/usr/share/ansible/roles:/etc/ansible/roles:../roles
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- name: Generate snapshot list out of volumes list
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ansible.builtin.set_fact:
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_snapshots: "{{ (_snapshots | default([])) + [{'vg': volume_group, 'lv': item.name, 'size': item.size}] }}"
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loop: "{{ volumes }}"
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- name: Create the snapshot
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vars:
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snapshot_create_volumes: "{{ _snapshots }}"
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snapshot_create_set_name: "{{ snapshot_set_name }}"
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ansible.builtin.include_role:
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name: snapshot_create
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- name: Verify that the snapshot was created
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ansible.builtin.include_tasks: verify-snapshot-created.yml
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loop: "{{ volumes }}"
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- name: Fill the volume
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block:
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- name: Set the retry count
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ansible.builtin.set_fact:
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_retry_count: "{{ (_retry_count | default('-1') | int) + 1 }}"
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- name: Generate the Sub-Directory name
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ansible.builtin.set_fact:
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_sub_dir_name: "{{ lookup('community.general.random_string', upper=false, numbers=false, special=false) }}"
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- name: Make a copy of the boot partition
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ansible.builtin.copy:
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src: /boot
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dest: "{{ test_directory }}/{{ _sub_dir_name }}"
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remote_src: true
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mode: '0777'
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- name: Get the status of the snapshot
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ansible.builtin.command: "lvs --select 'lv_name = {{ volume_name }}_{{ snapshot_set_name }}' --reportformat json"
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register: _lv_status_check
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changed_when: false
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- name: Store the snapshot data_percent
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ansible.builtin.set_fact:
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_snapshot_data_percent: "{{ ((_lv_status_check.stdout | from_json).report[0].lv[0].data_percent) }}"
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- name: Check if snapshot is full enough
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ansible.builtin.assert:
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that: _snapshot_data_percent|float > snapshot_fill_percent|float
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quiet: true
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rescue:
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- name: Check the retry count to avoid endless loop
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ansible.builtin.assert:
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that: (_retry_count|int) < (snapshot_max_retry|int)
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fail_msg: "Ended after {{ snapshot_max_retry }} retries"
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success_msg: "Volume is not full enough ({{ _snapshot_data_percent }}) - Run again..."
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- name: Include the same tasks file again
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ansible.builtin.include_tasks: fill-snapshot.yml
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- name: Unmount the "{{ item.directory }}"
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ansible.posix.mount:
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path: "{{ item.directory }}"
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state: absent
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- name: Remove the logical volume
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community.general.lvol:
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vg: "{{ volume_group }}"
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lv: "{{ item.name }}"
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force: true
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state: absent
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- name: Cleanup the volumes
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ansible.builtin.include_tasks: post-test-clean-volume.yml
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loop: "{{ volumes }}"
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- name: Remove the volume group
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community.general.lvg:
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vg: "{{ volume_group }}"
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pvs: "/dev/{{ device }}1"
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state: absent
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- name: Remove the PV
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ansible.builtin.command: "pvremove /dev/{{ device }}1"
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changed_when: true
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- name: Cleanup the system.devices file
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ansible.builtin.lineinfile:
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path: /etc/lvm/devices/system.devices
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regexp: "IDTYPE=devname IDNAME=/dev/{{ device }}1 DEVNAME=/dev/{{ device }}1 PVID=. PART=1"
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state: absent
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- name: Delete the partition
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community.general.parted:
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device: "/dev/{{ device }}"
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number: 1
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state: absent
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- name: Create the logical volume
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community.general.lvol:
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vg: "{{ volume_group }}"
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lv: "{{ item.name }}"
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size: "{{ item.size }}"
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force: true
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- name: Format the ext4 filesystem
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community.general.filesystem:
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fstype: ext4
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dev: "/dev/{{ volume_group }}/{{ item.name }}"
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- name: Mount the lv on "{{ item.directory }}"
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ansible.posix.mount:
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path: "{{ item.directory }}"
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src: "/dev/{{ volume_group }}/{{ item.name }}"
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fstype: ext4
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state: mounted
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- name: Create partition
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community.general.parted:
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device: "/dev/{{ device }}"
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number: 1
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part_end: 9GiB
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flags:
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- lvm
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state: present
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- name: Install lvm2 dependency
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ansible.builtin.package:
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name: lvm2
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state: present
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- name: Create the volume group
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community.general.lvg:
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vg: "{{ volume_group }}"
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pvs: "/dev/{{ device }}1"
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pesize: 16
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- name: Create and prepare the volumes
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ansible.builtin.include_tasks: pre-test-prepare-volume.yml
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loop: "{{ volumes }}"
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- name: Run lvs
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ansible.builtin.command: lvs --select 'vg_name = {{ volume_group }} && origin = {{ item.name }}' --reportformat json
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register: lvs_response
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changed_when: false
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- name: Parse report
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ansible.builtin.set_fact:
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lv_snapshot_array: "{{ (lvs_response.stdout | from_json).report[0].lv }}"
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- name: Verify that the the snapshot exists
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ansible.builtin.assert:
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that: (lv_snapshot_array | length) == 1
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fail_msg: >
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The snapshot for {{ item.name }} was not created
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- name: Get the snapshot name
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ansible.builtin.set_fact:
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snapshot_name: "{{ lv_snapshot_array[0].lv_name | default('n/a') }}"
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- name: Verify that the the snapshot was named correctly
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ansible.builtin.assert:
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that: snapshot_name == item.name + '_' + snapshot_set_name
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fail_msg: >
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Snapshot name '{{ snapshot_name }}' is not as expected {{ item.name }}_{{ snapshot_set_name }}
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- name: Run lvs
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ansible.builtin.command: lvs --select 'vg_name = {{ volume_group }} && lv_name = {{ volume_name }}_{{ snapshot_set_name }}' --reportformat json
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register: lvs_response
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changed_when: false
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- name: Parse report
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ansible.builtin.set_fact:
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lv_snapshot_report_array: "{{ (lvs_response.stdout | from_json).report[0].lv }}"
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- name: Verify that the snapshot no longer exists
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ansible.builtin.assert:
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that: (lv_snapshot_report_array | length) == 0
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fail_msg: >
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The snapshot '{{ volume_name }}_{{ snapshot_set_name }}'' for
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volume '{{ volume_name }}' in volume group '{{ volume_group }}'
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still exists
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