add borg_server role

roles/borg_server/README.md

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+ansible_borg_server
+=========
+
+An Ansible role to set up Borg repository(-ies) 
+
+Requirements
+------------
+
+Role Variables
+--------------
+
+None
+
+Dependencies
+------------
+
+None
+
+Example Playbook
+----------------
+
+```yaml
+roles:
+    - role: genlab.template
+```
+
+License
+-------
+
+BSD
+
+Author Information
+------------------
+
+corvus-migratorius@proton.me

roles/borg_server/defaults/main.yml

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+---
+hide_logs: true

roles/borg_server/handlers/main.yml

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+---

roles/borg_server/meta/main.yml

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+---
+galaxy_info:
+  role_name: "ansible_borg_server"
+  namespace: genlab
+  author: "Alexander Gorelyshev"
+  company: "Genlab, LLC"
+  description: "Set up Borg repository(-ies) "
+  license: "MIT"
+  min_ansible_version: "2.1"
+
+  platforms:
+    - name: "Ubuntu"
+      versions: [ "focal", "jammy" ]
+
+  galaxy_tags: [ ]
+
+dependencies: []

roles/borg_server/molecule/default/converge.yml

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+---
+- name: Converge
+  hosts: all
+  roles:
+    - role: genlab.common.ansible_borg_server
+      borg_secrets_path: "secrets.yaml"
+      hide_logs: false

roles/borg_server/molecule/default/molecule.yml

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+---
+dependency:
+  name: galaxy
+
+driver:
+  name: docker
+
+platforms:
+  - name: ubuntu
+    image: geerlingguy/docker-${MOLECULE_DISTRO:-ubuntu2204}-ansible:latest
+    pre_build_image: true
+    command: ${MOLECULE_DOCKER_COMMAND:-""}
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup:rw
+    cgroupns_mode: host
+    privileged: true
+
+provisioner:
+  name: ansible
+
+verifier:
+  name: ansible
+
+lint: |
+  set -e
+  yamllint .
+  ansible-lint .

roles/borg_server/molecule/default/secrets.yaml

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+---
+borg_repo_root: /storage/backups
+borg_repos:
+  - name: test-server
+    user: borg_test
+    ssh_key: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE8EIHdDtrDnK92G/9rOEPujKPha3E0g7VGWdAWYLnqj borg_test@test-server

roles/borg_server/molecule/default/verify.yml

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+---
+- name: Verify
+  hosts: all
+  gather_facts: false
+  any_errors_fatal: true
+
+  tasks:
+    - name: "Check if `borg` is available from PATH"  # noqa: no-changed-when
+      register: br_test__borg_version
+      ansible.builtin.command:
+        cmd: "borg --version"

roles/borg_server/tasks/main.yml

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+---
+- name: "Read secret variables"
+  ansible.builtin.include_vars:
+    file: "{{ borg_secrets_path }}"  # `borg_secrets`
+
+- name: "Install packages"
+  ansible.builtin.package:
+    name:
+      - borgbackup
+      - openssh-server
+    state: present
+    update_cache: true
+
+- name: "Create a group for borgs"
+  ansible.builtin.group:
+    name: borgs
+    state: present
+
+- name: "Create Borg users"
+  no_log: "{{ hide_logs }}"
+  loop: "{{ borg_repos }}"
+  ansible.builtin.user:
+    name: "{{ item.user }}"
+    comment: "Borg agent"
+    state: "present"
+    create_home: true
+    shell: "/bin/bash"
+    generate_ssh_key: true
+    groups: [ borgs ]
+    append: true
+
+- name: "Configure SSH authorized keys for Borg users"
+  no_log: "{{ hide_logs }}"
+  loop: "{{ borg_repos }}"
+  ansible.builtin.lineinfile:
+    path: /home/{{ item.user }}/.ssh/authorized_keys
+    create: true
+    owner: "{{ item.user }}"
+    group: "{{ item.user }}"
+    mode: "0600"
+    regexp: '^restrict,command="borg serve --append-only --restrict-to-repository'
+    line: >
+      restrict,command="borg serve --append-only --restrict-to-repository {{ borg_repo_root }}/{{ item.name }}"
+      {{ item.ssh_key }}
+
+- name: "Create a root folder for backups"
+  ansible.builtin.file:
+    path: "{{ borg_repo_root }}"
+    state: "directory"
+    owner: "root"
+    group: "borgs"
+    mode: "0770"
+
+- name: "Create repository folders"
+  no_log: "{{ hide_logs }}"
+  loop: "{{ borg_repos }}"
+  ansible.builtin.file:
+    path: "{{ borg_repo_root }}/{{ item.name }}"
+    state: "directory"
+    owner: "{{ item.user }}"
+    group: "{{ item.user }}"
+    mode: "0770"

roles/borg_server/vars/main.yml

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+---