refactor(mariadb): add state parameter and split container image arguments

The old service type oneshot combined with a wanted-by of multi-user.target
can lead to an infite recursion which systemd does not warn about,
causing a service that never activates.

README.md

@@ -5,6 +5,31 @@
 This ansible collection provides various roles for installing
 and configuring basic system utilities like gnupg, ssh etc
 
+- [`elasticsearch`](roles/elasticsearch/README.md): Deploy [elasticsearch](https://www.docker.elastic.co/r/elasticsearch/elasticsearch-oss),
+  a popular (distributed) search and analytics engine, mostly known by it's
+  letter "E" in the ELK-stack.
+
+- [`git`](roles/git/README.md): configures git on the target system
+
+- [`gnupg`](roles/gnupg/README.md): configures gnupg on the target system
+
+- [`lego`](roles/lego/README.md): runs [lego (LetsEncrypt Go)](https://github.com/go-acme/lego),
+  a ACME client written in go, using systemd (timers). Multi-instance capable.
+
+- [`mariadb`](roles/mariadb/README.md): runs [MariaDB Server](https://mariadb.org/), one of the world's most popular open source relational database
+
+- [`minio`](roles/minio/README.md): Deploy [min.io](https://min.io), an
+  s3-compatible object storage server, using docker containers.
+
+- [`nginx`](roles/nginx/README.md): [nginx](https://www.nginx.com/),
+  an advanced load balancer, webserver and reverse proxy.
+
+- [`restic`](roles/restic/README.md): Manage backups using restic
+  and persist them to a configurable backend.
+
+- [`powerdns_tsig_key`](roles/powerdns_tsig_key/README.md): Simple ansible role
+  for generating TSIG keys in PowerDNS.
+
 ## License
 
 [CNPLv7+](LICENSE.md): Cooperative Nonviolent Public License

galaxy.yml

@@ -1,13 +1,22 @@
 namespace: finallycoffee
 name: base
-version: 0.0.1
+version: 0.1.2
 readme: README.md
 authors:
-- Johanna Dorothea Reichmann <transcaffeine@finally.coffee>
-description: Roles for bootstrapping tools like gpg, ssh and git
-license:
-- CNPLv7+
+- transcaffeine <transcaffeine@finally.coffee>
+description: Roles for base services which are common dependencies other services like databases
+dependencies:
+  "community.docker": "^3.0.0"
+license_file: LICENSE.md
 build_ignore:
 - '*.tar.gz'
 repository: https://git.finally.coffee/finallycoffee/base
-issues: https://git.finally.coffee/finallycoffee/base/issues
+issues: https://codeberg.org/finallycoffee/ansible-collection-base/issues
+tags:
+  - docker
+  - elastic
+  - lego
+  - mariadb
+  - minio
+  - nginx
+  - restic

meta/runtime.yml

@@ -0,0 +1,3 @@
+---
+
+requires_ansible: ">=2.15"

roles/dns/README.md

@@ -0,0 +1,33 @@
+# `finallycoffee.base.dns` ansible role
+
+Simple role for wrapping around the
+[`famedly.dns.update`](https://github.com/famedly/ansible-collection-dns/blob/main/plugins/modules/update.py)
+ansible module.
+
+## Usage
+
+### Example playbook
+```yaml
+- target: "{{ target_hosts }}"
+  roles:
+    - role: finallycoffee.base.dns
+      vars:
+        dns_server: "dns.example.org"
+        dns_zone: "zone.example.org"
+        dns_records: "{{ dns_records }}"
+        dns_record_state: exact
+        dns_tsig_name: "mykeyname"
+        dns_tsig_algo: "hmac-sha256"
+        dns_tsig_key: "mykeycontent"
+  vars:
+    dns_records:
+      - type: A
+        name: gitea
+        content: "127.0.0.1"
+      - type: AAAA
+        name: gitea
+        content: "fe80::1"
+      - type: CNAME
+        name: "_acme_challenge.gitea"
+        content: "delegated-cname.challenge.example.org"
+```

roles/dns/defaults/main.yml

@@ -0,0 +1,2 @@
+---
+dns_record_state: present

roles/dns/tasks/main.yml

@@ -0,0 +1,11 @@
+---
+
+- name: Ensure DNS records in '{{ dns_zone }}' are up to date
+  famedly.dns.update:
+    primary_master: "{{ dns_server }}"
+    zone: "{{ dns_zone }}"
+    tsig_name: "{{ dns_tsig_name }}"
+    tsig_algo: "{{ dns_tsig_algo }}"
+    tsig_key: "{{ dns_tsig_key }}"
+    rr_set: "{{ dns_records }}"
+    state: "{{ dns_record_state }}"

roles/elasticsearch/README.md

@@ -0,0 +1,22 @@
+# `finallycoffee.base.elastiscsearch`
+
+A simple ansible role which deploys a single-node elastic container to provide
+an easy way to do some indexing.
+
+## Usage
+
+Per default, `/opt/elasticsearch/data` is used to persist data, it is
+customizable by using either `elasticsearch_base_path` or `elasticsearch_data_path`.
+
+As elasticsearch be can be quite memory heavy, the maximum amount of allowed RAM
+can be configured using `elasticsearch_allocated_ram_mb`, defaulting to 512 (mb).
+
+The cluster name and discovery type can be overridden using
+`elasticsearch_config_cluster_name` (default: elastic) and
+`elasticsearch_config_discovery_type` (default: single-node), should one
+need a multi-node elasticsearch deployment.
+
+Per default, no ports or networks are mapped, and explizit mapping using
+either ports (`elasticsearch_container_ports`) or networks
+(`elasticsearch_container_networks`) is required in order for other services
+to use elastic.

roles/elasticsearch/defaults/main.yml

@@ -0,0 +1,35 @@
+---
+
+elasticsearch_version: 7.17.7
+
+elasticsearch_base_path: /opt/elasticsearch
+elasticsearch_data_path: "{{ elasticsearch_base_path }}/data"
+
+elasticsearch_config_cluster_name: elastic
+elasticsearch_config_discovery_type: single-node
+elasticsearch_config_boostrap_memory_lock: true
+elasticsearch_allocated_ram_mb: 512
+
+elasticsearch_container_image_name: docker.elastic.co/elasticsearch/elasticsearch-oss
+elasticsearch_container_image_tag: ~
+elasticsearch_container_image: >-
+  {{ elasticsearch_container_image_name }}:{{ elasticsearch_container_image_tag | default(elasticsearch_version, true) }}
+
+elasticsearch_container_name: elasticsearch
+elasticsearch_container_env:
+  "ES_JAVA_OPTS": "-Xms{{ elasticsearch_allocated_ram_mb }}m -Xmx{{ elasticsearch_allocated_ram_mb }}m"
+  "cluster.name": "{{ elasticsearch_config_cluster_name }}"
+  "discovery.type": "{{ elasticsearch_config_discovery_type }}"
+  "bootstrap.memory_lock": "{{ 'true' if elasticsearch_config_boostrap_memory_lock else 'false' }}"
+elasticsearch_container_user: ~
+elasticsearch_container_ports: ~
+elasticsearch_container_labels:
+  version: "{{ elasticsearch_version }}"
+elasticsearch_container_ulimits:
+#  - "memlock:{{ (1.5 * 1024 * elasticsearch_allocated_ram_mb) | int }}:{{ (1.5 * 1024 * elasticsearch_allocated_ram_mb) | int }}"
+  - "memlock:-1:-1"
+elasticsearch_container_volumes:
+  - "{{ elasticsearch_data_path }}:/usr/share/elasticsearch/data:z"
+elasticsearch_container_networks: ~
+elasticsearch_container_purge_networks: ~
+elasticsearch_container_restart_policy: unless-stopped

roles/elasticsearch/tasks/main.yml

@@ -0,0 +1,32 @@
+---
+
+- name: Ensure host directories are present
+  file:
+    path: "{{ item }}"
+    state: directory
+    mode: "0777"
+  loop:
+    - "{{ elasticsearch_base_path }}"
+    - "{{ elasticsearch_data_path }}"
+
+- name: Ensure elastic container image is present
+  docker_image:
+    name: "{{ elasticsearch_container_image }}"
+    state: present
+    source: pull
+    force_source: "{{ elasticsearch_container_image_tag|default(false, true)|bool }}"
+
+- name: Ensure elastic container is running
+  docker_container:
+    name: "{{ elasticsearch_container_name }}"
+    image: "{{ elasticsearch_container_image }}"
+    env: "{{ elasticsearch_container_env | default(omit, True) }}"
+    user: "{{ elasticsearch_container_user | default(omit, True) }}"
+    ports: "{{ elasticsearch_container_ports | default(omit, True) }}"
+    labels: "{{ elasticsearch_container_labels | default(omit, True) }}"
+    volumes: "{{ elasticsearch_container_volumes }}"
+    ulimits: "{{ elasticsearch_container_ulimits }}"
+    networks: "{{ elasticsearch_container_networks | default(omit, True) }}"
+    purge_networks: "{{ elasticsearch_container_purge_networks | default(omit, True) }}"
+    restart_policy: "{{ elasticsearch_container_restart_policy }}"
+    state: started

roles/git/README.md

@@ -0,0 +1,19 @@
+# `finallycoffee.base.git` ansible role
+
+This role configures git for the `ansible_user` and can be used
+to (pre)-configure git.
+
+## Examples
+
+```yaml
+
+git_config_user_name: # user name to use for git
+git_config_user_email: # email to use for git
+
+git_config_core_editor: vim # editor to use
+
+git_config_credentials:
+  - remote_url: https://github.com
+    config:
+      username: my_github_username
+```

roles/gnupg/README.md

@@ -0,0 +1,4 @@
+# `finallycoffee.base.gnupg` ansible role
+
+Configures GnuPG on the target system, including a Smart-Card (SC) daemon
+and can set up gpg-agent as an SSH-agent.

roles/lego/README.md

@@ -0,0 +1,46 @@
+# `finallycoffee.base.lego` ansible role
+
+This role can be used to retrieve ACME certificates on the target host. It uses `lego` for that, and with systemd template units provides an easy way to configure and monitor the status for each certificate.
+
+## Requirements
+
+- `systemd`
+- write access to /tmp to unpack the lego release tarball during installation
+- write access to /opt/lego (or whatever `lego_base_path` is set to) for configuration and certificate data
+- `become` privileges of the `ansible_user` on the target
+
+## Usage
+
+### Required configuration
+
+- `lego_instance` - used for allowing multiple lego jobs to run with systemd template units. recommended to be set to the CN / first SAN of the certificate.
+- `lego_cert_domains` - list of FQDNs to request a certificate for
+- `lego_acme_account_email` - when using letsencrypt, a contact email is mandatory
+
+### Proxies / Registries
+
+The role ensure `lego` is downloaded from the github release page. If you are behind a proxy or use a registry like Nexus3, set `lego_release_archive_server`.
+
+### ACME server
+
+Per default, the Letsencrypt Staging ACME server is configured. Set `lego_acme_server_url` from `lego_letsencrypt_server_urls.{qa,prod}` or configure your own ACME v2 server directly.
+
+### Certificate
+
+To set for which domains to request a certificate for, set them as a list of SANs in `lego_cert_domains`. The default key type is EC256 and can be overridden using `lego_cert_key_type`.
+
+Set the type of challenge in `lego_acme_challenge_type` (to either `http` or `dns`), and `lego_acme_challenge_provider` to, for example, `rfc2136` for DNS challenges using the DNSUPDATE mechanism. If your challenge needs additional data, set that in `lego_command_config` as a dictionary analog to `lego_base_command_config` (see [defaults](defaults/main.yml)).
+
+## Trivia
+
+### Architecture
+
+By default, the lego distribution for `linux` on `amd64` is downloaded. If your target needs a different architecture or target OS, adjust this in `lego_os` and `lego_architecture`, cross-checking with the [lego GitHub release page](https://github.com/go-acme/lego/releases/tag/v4.17.4) for upstream availability.
+
+### User management
+
+The role will attempt to create user+group for each seperate lego instance for data isolation (i.e. to avoid leaking a TSIG key from one lego instance to other services). The user and group are of the form `acme-{{ lego_instance }}`. Beware that changing this in `lego_cert_{user,group}` also requires `lego_systemd_{user,group}` to be adjusted!
+
+### Binding to ports < 1024 (HTTP-01 challenge)
+
+Set `lego_binary_allow_net_bind_service: true` to allow the lego binary to bind to ports in the 'privileged' (< 1024) port range.

roles/lego/defaults/main.yml

@@ -0,0 +1,71 @@
+---
+lego_user: "lego"
+lego_version: "4.19.2"
+lego_instance: default
+lego_base_path: "/opt/lego"
+lego_cert_user: "acme-{{ lego_instance }}"
+lego_cert_group: "{{ lego_cert_user }}"
+lego_cert_mode: "0640" # rw-r-----
+lego_systemd_user: "acme-%i"
+lego_systemd_group: "{{ lego_systemd_user }}"
+lego_instance_base_path: "{{ lego_base_path }}/instances"
+lego_instance_path: "{{ lego_instance_base_path }}/{{ lego_instance }}"
+
+lego_cert_domains: []
+lego_cert_key_type: ec256
+lego_cert_days_to_renew: 30
+lego_acme_account_email: ~
+lego_acme_challenge_type: http
+lego_acme_challenge_provider: ~
+lego_letsencrypt_server_urls:
+  qa: "https://acme-staging-v02.api.letsencrypt.org/directory"
+  prod: "https://acme-v02.api.letsencrypt.org/directory"
+lego_acme_server_url: "{{ lego_letsencrypt_server_urls.qa }}"
+
+lego_base_environment:
+  LEGO_CERT_USER: "{{ lego_cert_user }}"
+  LEGO_CERT_GROUP: "{{ lego_cert_group }}"
+  LEGO_CERT_MODE: "{{ lego_cert_mode }}"
+  LEGO_CERT_STORE_PATH: "{{ lego_instance_path }}"
+  LEGO_CERT_DAYS_TO_RENEW: "{{ lego_cert_days_to_renew }}"
+  LEGO_KEY_TYPE: "{{ lego_cert_key_type }}"
+  LEGO_ACME_CHALLENGE_TYPE: "{{ lego_acme_challenge_type }}"
+  LEGO_ACME_SERVER: "{{ lego_acme_server_url }}"
+  LEGO_COMMAND_ARGS: "{{ lego_command_args }}"
+
+lego_base_command_config:
+  server: "{{ lego_acme_server_url }}"
+  accept_tos: true
+  email: "{{ lego_acme_account_email }}"
+  path: "{{ lego_instance_path }}"
+  key_type: "{{ lego_cert_key_type }}"
+
+lego_acme_challenge_config: >-
+  {{ {lego_acme_challenge_type: lego_acme_challenge_provider} }}
+
+lego_systemd_unit_path: "/etc/systemd/system"
+lego_systemd_template_unit_name: "lego@.service"
+lego_systemd_template_unit_file: "{{ lego_systemd_template_unit_name }}.j2"
+lego_systemd_service_name: "lego@{{ lego_instance }}.service"
+lego_systemd_environment: >-
+  {{ lego_base_environment | combine(lego_environment | default({})) }}
+lego_full_command_config: >-
+  {{ lego_base_command_config
+  | combine(lego_acme_challenge_config)
+  | combine(lego_command_config | default({})) }}
+
+lego_systemd_timer_name: "lego-{{ lego_instance }}.timer"
+lego_systemd_timer_template: lego.timer.j2
+lego_systemd_timer_calendar: "*-*-* *:00/15:00"
+
+lego_architecture: "{{ 'arm64' if ansible_architecture == 'aarch64' else 'amd64' }}"
+lego_os: "linux"
+lego_binary_allow_net_bind_service: false
+
+lego_release_archive_server: "https://github.com"
+lego_release_archive_filename: >-
+  lego_v{{ lego_version }}_{{ lego_os }}_{{ lego_architecture }}.tar.gz
+lego_release_archive_url: >-
+  {{ lego_release_archive_server }}/go-acme/lego/releases/download/v{{ lego_version }}/{{ lego_release_archive_filename }}
+lego_release_archive_file_path: "/tmp/{{ lego_release_archive_filename }}"
+lego_release_archive_path: "/tmp/lego_v{{ lego_version }}_{{ lego_os }}_{{ lego_architecture }}"

roles/lego/files/lego_run.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+LEGO_BINARY=$(/usr/bin/env which lego)
+
+if [[ -n "$LEGO_HTTP_FALLBACK_PORT" ]]; then
+  nc -z 127.0.0.1 $LEGO_HTTP_PORT;
+  if [[ $? -eq 0 ]]; then
+      LEGO_HTTP_PORT=$LEGO_HTTP_FALLBACK_PORT
+  fi
+fi
+
+LEGO_COMMAND_ARGS_EXPANDED=$(bash -c "echo $LEGO_COMMAND_ARGS") # This is a bit icky
+
+FILES_IN_DIR=$(find "$LEGO_CERT_STORE_PATH/certificates" | wc -l)
+if [[ $FILES_IN_DIR -gt 2 ]]; then
+        $LEGO_BINARY $LEGO_COMMAND_ARGS_EXPANDED renew --days=$LEGO_CERT_DAYS_TO_RENEW
+else
+        $LEGO_BINARY $LEGO_COMMAND_ARGS_EXPANDED run
+fi
+
+ls "$LEGO_CERT_STORE_PATH/certificates" | xargs -I{} -n 1 chmod "$LEGO_CERT_MODE" "$LEGO_CERT_STORE_PATH/certificates/{}"
+ls "$LEGO_CERT_STORE_PATH/certificates" | xargs -I{} -n 1 chown "$LEGO_CERT_USER":"$LEGO_CERT_GROUP" "$LEGO_CERT_STORE_PATH/certificates/{}"

roles/lego/handlers/main.yml

@@ -0,0 +1,5 @@
+---
+- name: Ensure systemd daemon is reloaded
+  ansible.builtin.systemd:
+    daemon_reload: true
+  listen: systemd_reload

roles/lego/tasks/main.yml

@@ -0,0 +1,157 @@
+---
+- name: Ensure lego cert group is created
+  ansible.builtin.group:
+    name: "{{ lego_cert_group }}"
+    state: present
+    system: true
+
+- name: Ensure lego cert user is created
+  ansible.builtin.user:
+    name: "{{ lego_cert_user }}"
+    state: present
+    system: true
+    create_home: false
+    groups:
+      - "{{ lego_cert_group }}"
+    append: true
+
+- name: Ensure lego user is created
+  ansible.builtin.user:
+    name: "{{ lego_user }}"
+    state: present
+    system: true
+    create_home: false
+    groups:
+      - "{{ lego_cert_group }}"
+    append: true
+
+- name: Ensure lego is installed
+  block:
+    - name: Check if lego is present
+      ansible.builtin.command:
+        cmd: which lego
+      changed_when: false
+      failed_when: false
+      register: lego_binary_info
+
+    - name: Download lego from source
+      ansible.builtin.get_url:
+        url: "{{ lego_release_archive_url }}"
+        url_username: "{{ lego_release_archive_url_username | default(omit) }}"
+        url_password: "{{ lego_release_archive_url_password | default(omit) }}"
+        dest: "{{ lego_release_archive_file_path }}"
+      when: lego_binary_info.rc != 0
+
+    - name: Create folder to uncompress into
+      ansible.builtin.file:
+        dest: "{{ lego_release_archive_path }}"
+        state: directory
+      when: lego_binary_info.rc != 0
+
+    - name: Uncompress lego source archive
+      ansible.builtin.unarchive:
+        src: "{{ lego_release_archive_file_path }}"
+        dest: "{{ lego_release_archive_path }}"
+        remote_src: true
+      when: lego_binary_info.rc != 0
+
+    - name: Ensure lego binary is present in PATH
+      ansible.builtin.copy:
+        src: "{{ lego_release_archive_path }}/lego"
+        dest: "/usr/local/bin/lego"
+        mode: "u+rwx,g+rx,o+rx"
+        remote_src: true
+      when: lego_binary_info.rc != 0
+
+    - name: Ensure lego is allowed to bind to ports < 1024
+      community.general.capabilities:
+        path: "/usr/local/bin/lego"
+        capability: "cap_net_bind_service+ep"
+        state: present
+      when: lego_binary_allow_net_bind_service
+
+    - name: Ensure intermediate data is gone
+      ansible.builtin.file:
+        path: "{{ item }}"
+        state: absent
+      loop:
+        - "{{ lego_release_archive_path }}"
+        - "{{ lego_release_archive_file_path }}"
+      when: lego_binary_info.rc != 0
+
+- name: Ensure lego base path exists
+  ansible.builtin.file:
+    path: "{{ lego_base_path }}"
+    state: directory
+    mode: "0755"
+
+- name: Ensure template unit file is present
+  ansible.builtin.template:
+    src: "{{ lego_systemd_template_unit_file }}"
+    dest: "{{ lego_systemd_unit_path }}/{{ lego_systemd_template_unit_name }}"
+  notify:
+    - systemd_reload
+
+- name: Ensure env file is templated
+  ansible.builtin.copy:
+    content: |+
+      {% for entry in lego_systemd_environment | dict2items %}
+      {{ entry.key }}={{ entry.value }}
+      {% endfor %}
+    dest: "{{ lego_base_path }}/{{ lego_instance }}.conf"
+
+- name: Ensure timer unit is templated
+  ansible.builtin.template:
+    src: "{{ lego_systemd_timer_template }}"
+    dest: "{{ lego_systemd_unit_path }}/{{ lego_systemd_timer_name }}"
+  notify:
+    - systemd_reload
+
+- name: Ensure handling script is templated
+  ansible.builtin.copy:
+    src: "lego_run.sh"
+    dest: "{{ lego_base_path }}/run.sh"
+    mode: "0755"
+
+- name: Ensure per-instance base path is created
+  ansible.builtin.file:
+    path: "{{ lego_instance_path }}"
+    state: directory
+    owner: "{{ lego_cert_user }}"
+    group: "{{ lego_cert_group }}"
+    mode: "0755"
+
+- name: Ensure per-instance sub folders are created with correct permissions
+  ansible.builtin.file:
+    path: "{{ item.path }}"
+    state: directory
+    owner: "{{ item.owner | default(lego_cert_user) }}"
+    group: "{{ item.group | default(lego_cert_group) }}"
+    mode: "{{ item.mode }}"
+  loop:
+    - path: "{{ lego_instance_path }}/secrets"
+      mode: "0750"
+    - path: "{{ lego_instance_path }}/accounts"
+      mode: "0770"
+    - path: "{{ lego_instance_path }}/certificates"
+      mode: "0775"
+  loop_control:
+    label: "{{ item.path }}"
+
+- name: Ensure systemd daemon is reloaded
+  meta: flush_handlers
+
+- name: Ensure systemd timer is enabled
+  ansible.builtin.systemd_service:
+    name: "{{ lego_systemd_timer_name }}"
+    enabled: true
+
+- name: Ensure systemd timer is started
+  ansible.builtin.systemd_service:
+    name: "{{ lego_systemd_timer_name }}"
+    state: "started"
+
+- name: Ensure systemd service is started once to obtain the certificate
+  ansible.builtin.systemd_service:
+    name: "{{ lego_systemd_service_name }}"
+    state: "started"

roles/lego/templates/lego.timer.j2

@@ -0,0 +1,9 @@
+[Unit]
+Description=Run lego@{{ lego_instance}}.service
+
+[Timer]
+OnCalendar={{ lego_systemd_timer_calendar }}
+Unit=lego@{{ lego_instance }}.service
+
+[Install]
+WantedBy=timers.target

roles/lego/templates/lego@.service.j2

@@ -0,0 +1,14 @@
+[Unit]
+Description=Run lego (letsencrypt client in go)
+
+[Service]
+Type=oneshot
+EnvironmentFile={{ lego_base_path }}/%i.conf
+User={{ lego_systemd_user }}
+Group={{ lego_systemd_group }}
+ExecStart={{ lego_base_path }}/run.sh
+AmbientCapabilities=CAP_NET_BIND_SERVICE
+
+[Install]
+WantedBy=basic.target
+DefaultInstance=default

roles/lego/vars/main.yml

@@ -0,0 +1,16 @@
+---
+
+lego_domain_command_args: >-
+  {% for domain in lego_cert_domains %}
+   --domains={{ domain }}
+  {%- endfor %}
+
+lego_config_command_args: >-
+  {% for key in lego_full_command_config %}
+   --{{ key | replace("_", "-") }}
+  {%- if lego_full_command_config[key] != None and lego_full_command_config[key] != '' -%}
+  ={{ lego_full_command_config[key] }}
+  {%- endif -%}
+  {%- endfor -%}
+
+lego_command_args: "{{ lego_domain_command_args }} {{ lego_config_command_args }}"

roles/mariadb/README.md

@@ -0,0 +1,19 @@
+# `finallycoffee.base.mariadb` ansible role
+
+This role deploys a MariaDB instance in a docker container.
+
+## Usage
+
+The role expects the following variables to be populated with values and/or secrets:
+
+```yaml
+mariadb_root_password: #mariadb root password
+mariadb_database: # name of the database to create
+mariadb_username: # name of a user to auto-create and assign permission on the mariadb_database
+mariadb_password: # password of the user in mariadb_username
+```
+
+## Requirements
+
+- Docker installed
+- python-docker present on target system for ansible to be able to talk with the docker API.

roles/mariadb/defaults/main.yml

@@ -0,0 +1,49 @@
+---
+mariadb_version: "10.11.9"
+mariadb_base_path: /var/lib/mariadb
+mariadb_data_path: >-2
+  {{ mariadb_base_path }}/{{ mariadb_version | split('.') | first }}
+mariadb_state: present
+
+mariadb_root_password: ~
+mariadb_database: ~
+mariadb_username: ~
+mariadb_password: ~
+
+mariadb_container_base_environment:
+  MARIADB_ROOT_PASSWORD: "{{ mariadb_root_password }}"
+mariadb_container_extra_environment: {}
+
+mariadb_container_image_registry: docker.io
+mariadb_container_image_namespace: ~
+mariadb_container_image_name: mariadb
+mariadb_container_image_tag: ~
+mariadb_container_image: >-2
+  {{
+    ([
+      mariadb_container_image_registry | default([], true),
+      mariadb_container_image_namespace | default([], true),
+      mariadb_container_image_name,
+    ] | flatten | join('/'))
+    + ':' + mariadb_container_image_tag | default(mariadb_version, true)
+  }}
+mariadb_container_image_source: pull
+mariadb_container_image_force_source: >-2
+  {{ mariadb_container_image_tag | default(false, true) | bool }}
+
+mariadb_container_name: mariadb
+mariadb_container_base_volumes:
+  - "{{ mariadb_data_path }}:{{ mariadb_container_data_path }}:z"
+mariadb_container_extra_volumes: []
+mariadb_container_base_labels:
+  version: "{{ mariadb_version }}"
+mariadb_container_extra_labels: {}
+mariadb_container_restart_policy: "unless-stopped"
+mariadb_container_environment: >-2
+  {{ mariadb_container_base_environment
+  | combine(mariadb_container_database_environment
+      if (mariadb_database and mariadb_username and mariadb_password)
+      else {}, recursive=True)
+  | combine(mariadb_container_extra_environment) }}
+mariadb_container_state: >-2
+  {{ (mariadb_state == 'present') | ternary('started', 'absent') }}

roles/mariadb/tasks/main.yml

@@ -0,0 +1,21 @@
+---
+- name: Ensure mariadb container image '{{ mariadb_container_image }}' is {{ mariadb_state }}
+  community.docker.docker_image:
+    name: "{{ mariadb_container_image }}"
+    state: "{{ mariadb_state }}"
+    source: "{{ mariadb_container_image_source }}"
+    force_source: "{{ mariadb_container_image_force_source }}"
+
+- name: Ensure mariadb container '{{ mariadb_container_name }}' is {{ mariadb_container_state }}
+  community.docker.docker_container:
+    name: "{{ mariadb_container_name }}"
+    image: "{{ mariadb_container_image }}"
+    env: "{{ mariadb_container_environment }}"
+    ports: "{{ mariadb_container_ports | default(omit, true) }}"
+    labels: "{{ mariadb_container_labels | default(omit, true) }}"
+    volumes: "{{ mariadb_container_volumes }}"
+    networks: "{{ mariadb_container_networks | default(omit, true) }}"
+    etc_hosts: "{{ mariadb_container_etc_hosts | default(omit, true) }}"
+    purge_networks: "{{ mariadb_container_purge_networks | default(omit, true) }}"
+    restart_policy: "{{ mariadb_container_restart_policy }}"
+    state: "{{ mariadb_container_state }}"

roles/mariadb/vars/main.yml

@@ -0,0 +1,10 @@
+---
+
+mariadb_container_database_environment:
+  MARIADB_DATABASE: "{{ mariadb_database }}"
+  MARIADB_USER: "{{ mariadb_username }}"
+  MARIADB_PASSWORD: "{{ mariadb_password }}"
+
+mariadb_container_data_path: /var/lib/mysql
+mariadb_container_volumes: "{{ mariadb_container_base_volumes + mariadb_container_extra_volumes }}"
+mariadb_container_labels: "{{ mariadb_container_base_labels | combine(mariadb_container_extra_labels, recursive=True) }}"

roles/minio/README.md

@@ -0,0 +1,29 @@
+# `finallycoffee.base.minio` ansible role
+
+## Overview
+
+This role deploys a [min.io](https://min.io) server (s3-compatible object storage server)
+using the official docker container image.
+
+## Configuration
+
+The role requires setting the password for the `root` user (name can be changed by
+setting `minio_root_username`) in `minio_root_password`. That user has full control
+over the minio-server instance.
+
+### Useful config hints
+
+Most configuration is done by setting environment variables in
+`minio_container_extra_env`, for example:
+
+```yaml
+minio_container_extra_env:
+  # disable the "console" web browser UI
+  MINIO_BROWSER: off
+  # enable public prometheus metrics on `/minio/v2/metrics/cluster`
+  MINIO_PROMETHEUS_AUTH_TYPE: public
+```
+
+When serving minio (or any s3-compatible server) on a "subfolder",
+see https://docs.aws.amazon.com/AmazonS3/latest/userguide/RESTRedirect.html
+and https://docs.aws.amazon.com/AmazonS3/latest/userguide/VirtualHosting.html

roles/minio/defaults/main.yml

@@ -0,0 +1,41 @@
+---
+
+minio_user: ~
+minio_data_path: /opt/minio
+
+minio_create_user: false
+minio_manage_host_filesystem: false
+
+minio_root_username: root
+minio_root_password: ~
+
+minio_container_name: minio
+minio_container_image_name: docker.io/minio/minio
+minio_container_image_tag: latest
+minio_container_image: "{{ minio_container_image_name }}:{{ minio_container_image_tag }}"
+minio_container_networks: []
+minio_container_ports: []
+
+minio_container_base_volumes:
+  - "{{ minio_data_path }}:{{ minio_container_data_path }}:z"
+minio_container_extra_volumes: []
+
+minio_container_base_env:
+  MINIO_ROOT_USER: "{{ minio_root_username }}"
+  MINIO_ROOT_PASSWORD: "{{ minio_root_password }}"
+minio_container_extra_env: {}
+
+minio_container_labels: {}
+
+minio_container_command:
+  - "server"
+  - "{{ minio_container_data_path }}"
+  - "--console-address"
+  - ":{{ minio_container_listen_port_console }}"
+minio_container_restart_policy: "unless-stopped"
+minio_container_image_force_source: "{{ (minio_container_image_tag == 'latest')|bool }}"
+
+minio_container_listen_port_api: 9000
+minio_container_listen_port_console: 8900
+
+minio_container_data_path: /storage

roles/minio/tasks/main.yml

@@ -0,0 +1,37 @@
+---
+
+- name: Ensure minio run user is present
+  user:
+    name: "{{ minio_user }}"
+    state: present
+    system: yes
+  when: minio_create_user
+
+- name: Ensure filesystem mounts ({{ minio_data_path }}) for container volumes are present
+  file:
+    path: "{{ minio_data_path }}"
+    state: directory
+    user: "{{ minio_user|default(omit, True) }}"
+    group: "{{ minio_user|default(omit, True) }}"
+  when: minio_manage_host_filesystem
+
+- name: Ensure container image for minio is present
+  community.docker.docker_image:
+    name: "{{ minio_container_image }}"
+    state: present
+    source: pull
+    force_source: "{{ minio_container_image_force_source }}"
+
+- name: Ensure container {{ minio_container_name }} is running
+  docker_container:
+    name: "{{ minio_container_name }}"
+    image: "{{ minio_container_image }}"
+    volumes: "{{ minio_container_volumes }}"
+    env: "{{ minio_container_env }}"
+    labels: "{{ minio_container_labels }}"
+    networks: "{{ minio_container_networks }}"
+    ports: "{{ minio_container_ports }}"
+    user: "{{ minio_user|default(omit, True) }}"
+    command: "{{ minio_container_command }}"
+    restart_policy: "{{ minio_container_restart_policy }}"
+    state: started

roles/minio/vars/main.yml

@@ -0,0 +1,5 @@
+---
+
+minio_container_volumes: "{{ minio_container_base_volumes + minio_container_extra_volumes }}"
+
+minio_container_env: "{{ minio_container_base_env | combine(minio_container_extra_env) }}"

roles/nginx/README.md

@@ -0,0 +1,33 @@
+# `finallycoffee.services.nginx` ansible role
+
+## Description
+
+Runs `nginx`, a HTTP reverse proxy, in a docker container.
+
+## Usage
+
+For the role to do anything, `nginx_config` needs to be populated with the configuration for nginx.
+An example would be:
+
+```yaml
+nginx_config: |+
+  server {
+    listen 80 default_server;
+    server_name my.server.fqdn;
+    location / { return 200; }
+  }
+```
+
+The container is named `nginx` by default, this can be overridden in `nginx_container_name`.
+When running this role multiple times, `nginx_base_path` should also be changed for each run,
+otherwise the configuration files collide in the filesystem.
+
+For exposing this server to the host and/or internet, the `nginx_container_ports` (port forwarding host
+from host to container), `nginx_container_networks` (docker networking) or `nginx_container_labels`
+(for label-based routing discovery like traefik) can be used. The options correspond to the arguments
+of the `community.docker.docker_container` module.
+
+## Deployment methods
+
+Set `nginx_deployment_method` to either `docker` or `podman` to use the respective ansible modules for
+creating and managing the container and its image. See all supported methods in `nginx_deployment_methods`.

roles/nginx/defaults/main.yml

@@ -0,0 +1,37 @@
+---
+nginx_version: "1.27.2"
+nginx_flavour: alpine
+nginx_base_path: /opt/nginx
+nginx_config_file: "{{ nginx_base_path }}/nginx.conf"
+nginx_state: present
+nginx_deployment_method: docker
+
+nginx_container_name: nginx
+nginx_container_image_reference: >-
+  {{
+    nginx_container_image_repository
+    + ':' + (nginx_container_image_tag
+      | default(nginx_version
+      + (('-' + nginx_flavour) if nginx_flavour is defined else ''), true))
+  }}
+nginx_container_image_repository: >-
+  {{
+    (
+      container_registries[nginx_container_image_registry]
+      | default(nginx_container_image_registry)
+    )
+    + '/'
+    + nginx_container_image_namespace | default('')
+    + nginx_container_image_name
+  }}
+nginx_container_image_registry: "docker.io"
+nginx_container_image_name: "nginx"
+nginx_container_image_tag: ~
+nginx_container_image_source: pull
+nginx_container_state: >-2
+  {{ (nginx_state == 'present') | ternary('started', 'absent') }}
+
+nginx_container_restart_policy: "unless-stopped"
+nginx_container_volumes:
+  - "{{ nginx_config_file }}:/etc/nginx/conf.d/nginx.conf:ro"
+ 

roles/nginx/handlers/main.yml

@@ -0,0 +1,8 @@
+---
+
+- name: Ensure nginx container '{{ nginx_container_name }}' is restarted
+  community.docker.docker_container:
+    name: "{{ nginx_container_name }}"
+    state: started
+    restart: true
+  listen: restart-nginx

roles/nginx/meta/main.yml

@@ -0,0 +1,12 @@
+---
+allow_duplicates: true
+dependencies: []
+galaxy_info:
+  role_name: nginx
+  description: Deploy nginx, a webserver
+  galaxy_tags:
+    - nginx
+    - http
+    - webserver
+    - docker
+    - podman

roles/nginx/tasks/deploy-docker.yml

@@ -0,0 +1,28 @@
+---
+- name: Ensure docker container image '{{ nginx_container_image_reference }}' is {{ nginx_state }}
+  community.docker.docker_image:
+    name: "{{ nginx_container_image_reference }}"
+    state: "{{ nginx_state }}"
+    source: "{{ nginx_container_image_source }}"
+    force_source: >-2
+      {{ nginx_container_image_force_source
+        | default(nginx_container_image_tag | default(false, true)) }}
+  register: nginx_container_image_info
+  until: nginx_container_image_info is success
+  retries: 5
+  delay: 3
+
+- name: Ensure docker container '{{ nginx_container_name }}' is {{ nginx_container_state }}
+  community.docker.docker_container:
+    name: "{{ nginx_container_name }}"
+    image: "{{ nginx_container_image_reference }}"
+    env: "{{ nginx_container_env | default(omit, true) }}"
+    user: "{{ nginx_container_user | default(omit, true) }}"
+    ports: "{{ nginx_container_ports | default(omit, true) }}"
+    labels: "{{ nginx_container_labels | default(omit, true) }}"
+    volumes: "{{ nginx_container_volumes | default(omit, true) }}"
+    etc_hosts: "{{ nginx_container_etc_hosts | default(omit, true) }}"
+    networks: "{{ nginx_container_networks | default(omit, true) }}"
+    purge_networks: "{{ nginx_container_purge_networks | default(omit, true) }}"
+    restart_policy: "{{ nginx_container_restart_policy }}"
+    state: "{{ nginx_container_state }}"

roles/nginx/tasks/deploy-podman.yml

@@ -0,0 +1,27 @@
+---
+- name: Ensure container image '{{ nginx_container_image_reference }}' is {{ nginx_state }}
+  containers.podman.podman_image:
+    name: "{{ nginx_container_image_reference }}"
+    state: "{{ nginx_state }}"
+    pull: "{{ nginx_container_image_source == 'pull' }}"
+    force: >-2
+      {{ nginx_container_image_force_source
+        | default(nginx_container_image_tag | default(false, true)) }}
+  register: nginx_container_image_info
+  until: nginx_container_image_info is success
+  retries: 5
+  delay: 3
+
+- name: Ensure container '{{ nginx_container_name }}' is {{ nginx_container_state }}
+  containers.podman.podman_container:
+    name: "{{ nginx_container_name }}"
+    image: "{{ nginx_container_image_reference }}"
+    env: "{{ nginx_container_env | default(omit, true) }}"
+    user: "{{ nginx_container_user | default(omit, true) }}"
+    ports: "{{ nginx_container_ports | default(omit, true) }}"
+    labels: "{{ nginx_container_labels | default(omit, true) }}"
+    volumes: "{{ nginx_container_volumes | default(omit, true) }}"
+    etc_hosts: "{{ nginx_container_etc_hosts | default(omit, true) }}"
+    network: "{{ nginx_container_networks | default(omit, true) }}"
+    restart_policy: "{{ nginx_container_restart_policy }}"
+    state: "{{ nginx_container_state }}"

roles/nginx/tasks/main.yml

@@ -0,0 +1,40 @@
+---
+- name: Check if state is supported
+  ansible.builtin.fail:
+    msg: >-2
+      Unsupported state '{{ nginx_state }}'. Supported
+      states are {{ nginx_states | join(', ') }}.
+  when: nginx_state not in nginx_states
+
+- name: Check if deployment_method is supported
+  ansible.builtin.fail:
+    msg: >-2
+      Unsupported state '{{ nginx_deployment_method }}'. Supported
+      states are {{ nginx_deployment_methods | join(', ') }}.
+  when: nginx_deployment_method not in nginx_deployment_methods
+
+- name: Ensure nginx config file is {{ nginx_state }}
+  ansible.builtin.file:
+    path: "{{ nginx_config_file }}"
+    state: "{{ nginx_state }}"
+  when: nginx_state == 'absent'
+
+- name: Ensure base path '{{ nginx_base_path }}' is {{ nginx_state }}
+  ansible.builtin.file:
+    path: "{{ nginx_base_path }}"
+    mode: "0755"
+    state: >-2
+      {{ (nginx_state == 'present') | ternary('directory', 'absent') }}
+
+- name: Ensure nginx config file is templated
+  ansible.builtin.copy:
+    dest: "{{ nginx_config_file }}"
+    content: "{{ nginx_config }}"
+    mode: 0640
+  notify:
+    - restart-nginx
+  when: nginx_state == 'present'
+
+- name: Deploy using {{ nginx_deployment_method }}
+  ansible.builtin.include_tasks:
+    file: "deploy-{{ nginx_deployment_method }}.yml"

roles/nginx/vars/main.yml

@@ -0,0 +1,7 @@
+---
+nginx_states:
+  - present
+  - absent
+nginx_deployment_methods:
+  - docker
+  - podman

roles/powerdns_tsig_key/README.md

@@ -0,0 +1,25 @@
+# `finallycoffee.base.powerdns_tsig_key`
+
+Simple ansible role for ensuring a TSIG key is present in a given PowerDNS-
+instance.
+
+## Usage
+
+The usage example below assumes `powerdns` is running in a container named `powerdns` (as supplied to `powerdns_tsig_key_container_name`.
+
+```yaml
+- hosts: "{{ target_hosts }}"
+  become: true
+  roles:
+    - role: finallycoffee.base.powerdns_tsig_key
+      vars:
+        powerdns_tsig_key_name: "nameofmykey"
+        powerdns_tsig_key_path: "/var/lib/myapp/tsig.key"
+        powernds_tsig_key_algo: "hmac-sha512"
+        powerdns_tsig_key_path_owner: "myappuser"
+        powerdns_tsig_key_path_group: "myappgroup"
+        powerdns_tsig_key_container_name: 'powerdns'
+```
+
+> [!NOTE]
+> Support for non-docker deployments is pending.

roles/powerdns_tsig_key/defaults/main.yml

@@ -0,0 +1,2 @@
+---
+powerdns_tsig_key_container_name: powerdns

roles/powerdns_tsig_key/tasks/main.yml

@@ -0,0 +1,104 @@
+---
+- name: Ensure unix group '{{ powerdns_tsig_key_path_group }}' exists
+  ansible.builtin.group:
+    name: "{{ powerdns_tsig_key_path_group }}"
+    state: "present"
+    system: true
+  register: powerdns_tsig_key_path_group_info
+  when: powerdns_tsig_key_path_group is defined
+
+- name: Ensure unix user '{{ powerdns_tsig_key_path_owner }}' exists
+  ansible.builtin.user:
+    name: "{{ powerdns_tsig_key_path_owner }}"
+    state: "present"
+    system: true
+    create_home: false
+    groups: "{{ powerdns_tsig_key_path_group is defined | ternary([powerdns_tsig_key_path_group], omit) }}"
+    append: "{{ powerdns_tsig_key_path_group is defined | ternary(true, omit) }}"
+  register: powerdns_tsig_key_path_owner_info
+  when: powerdns_tsig_key_path_owner is defined
+
+- name: Check if TSIG key is already present
+  ansible.builtin.stat:
+    path: "{{ powerdns_tsig_key_path }}"
+  register: powerdns_tsig_key_info
+
+- name: Ensure TSIG key directory is present
+  ansible.builtin.file:
+    path: "{{ powerdns_tsig_key_path | dirname }}"
+    state: directory
+    owner: "{{ powerdns_tsig_key_path_owner | default(omit) }}"
+    group: "{{ powerdns_tsig_key_path_group | default(omit) }}"
+    mode: "u+rwX,g+rX"
+    recurse: true
+
+- name: Ensure a TSIG key is configured and persisted
+  when: >-
+    not powerdns_tsig_key_info.stat.exists
+    or powerdns_tsig_key_info.stat.size == 0
+  block:
+    - name: Ensure TSIG key is not already present
+      community.docker.docker_container_exec:
+        container: "{{ powerdns_tsig_key_container_name }}"
+        command: "pdnsutil list-tsig-keys"
+      delegate_to: "{{ powerdns_tsig_key_hostname }}"
+      register: powerdns_tsig_key_powerdns_info
+      changed_when: false
+      check_mode: false
+      become: true
+
+    - name: Ensure TSIG key is generated in powerdns
+      community.docker.docker_container_exec:
+        container: "{{ powerdns_tsig_key_container_name }}"
+        command: "pdnsutil generate-tsig-key '{{ powerdns_tsig_key_name }}' '{{ powerdns_tsig_key_algo }}'"
+      when: >-
+        (powerdns_tsig_key_name ~ '. ' ~ powerdns_tsig_key_algo ~ '. ')
+        not in powerdns_tsig_key_powerdns_info.stdout
+      delegate_to: "{{ powerdns_tsig_key_hostname }}"
+      register: powerdns_tsig_key_powerdns_generated_tsig_key
+      throttle: 1
+      become: true
+
+    - name: Ensure PowerDNS is restarted
+      community.docker.docker_container:
+        name: "{{ powerdns_tsig_key_container_name }}"
+        state: started
+        restart: true
+      when: >-
+        (powerdns_tsig_key_name ~ '. ' ~ powerdns_tsig_key_algo ~ '. ')
+        not in powerdns_tsig_key_powerdns_info.stdout
+      delegate_to: "{{ powerdns_tsig_key_hostname }}"
+      throttle: 1
+      become: true
+
+    - name: Extract TSIG key into variable
+      ansible.builtin.set_fact:
+        powerdns_tsig_key_key: >-
+          {{
+            (powerdns_tsig_key_powerdns_generated_tsig_key.stdout | trim | split(' ') | list | last)
+            if (powerdns_tsig_key_name ~ '. ' ~ powerdns_tsig_key_algo ~ '. ')
+            not in powerdns_tsig_key_powerdns_info.stdout
+            else (powerdns_generated_tsig_key | trim | split(' ') | list | last)
+          }}
+      vars:
+        powerdns_generated_tsig_key: >-
+          {% for line in powerdns_tsig_key_powerdns_info.stdout_lines %}
+          {% if powerdns_tsig_key_name in line %}
+          {{ line }}
+          {% endif %}
+          {% endfor %}
+
+    - name: Ensure TSIG key is persisted into {{ powerdns_tsig_key_path }}
+      ansible.builtin.copy:
+        content: "{{ powerdns_tsig_key_key }}"
+        dest: "{{ powerdns_tsig_key_path }}"
+        owner: "{{ powerdns_tsig_key_path_owner | default(omit) }}"
+        group: "{{ powerdns_tsig_key_path_group | default(omit) }}"
+        mode: "0640"
+
+- name: Ensure TSIG key permissions on {{ powerdns_tsig_key_path }} are correct
+  ansible.builtin.file:
+    path: "{{ powerdns_tsig_key_path }}"
+    owner: "{{ powerdns_tsig_key_path_owner | default(omit) }}"
+    group: "{{ powerdns_tsig_key_path_group | default(omit) }}"
+    mode: "u+rwX,g+rwX"

roles/restic/README.md

@@ -0,0 +1,77 @@
+# `finallycoffee.base.restic`
+
+Ansible role for backup up data using `restic`, utilizing `systemd` timers for scheduling.
+
+## Overview
+
+As restic encrypts the data before storing it, the `restic_repo_password` needs
+to be populated with a strong key, and saved accordingly as only this key can
+be used to decrypt the data for a restore!
+
+### Backends
+
+#### S3 Backend
+
+To use a `s3`-compatible backend like AWS buckets or minio, both `restic_s3_key_id`
+and `restic_s3_access_key` need to be populated, and the `restic_repo_url` has the
+format `s3:https://my.s3.endpoint:port/bucket-name`.
+
+#### SFTP Backend
+
+Using the `sftp` backend requires the configured `restic_user` to be able to
+authenticate to the configured SFTP-Server using password-less methods like
+publickey-authentication. The `restic_repo_url` then follows the format
+`sftp:{user}@{server}:/my-restic-repository` (or without leading `/` for relative
+paths to the `{user}`s home directory.
+
+### Backing up data
+
+A job name like `$service-postgres` or similar needs to be set in `restic_job_name`,
+which is used for naming the `systemd` units, their syslog identifiers etc.
+
+If backing up filesystem locations, the paths need to be specified in
+`restic_backup_paths` as lists of strings representing absolute filesystem
+locations.
+
+If backing up f.ex. database or other data which is generating backups using
+a command like `pg_dump`, use `restic_backup_stdin_command` (which needs to output
+to `stdout`) in conjunction with `restic_backup_stdin_command_filename` to name
+the resulting output (required).
+
+### Policy
+
+The backup policy can be adjusted by overriding the `restic_policy_keep_*`
+variables, with the defaults being:
+
+```yaml
+restic_policy_keep_all_within: 1d
+restic_policy_keep_hourly: 6
+restic_policy_keep_daily: 2
+restic_policy_keep_weekly: 7
+restic_policy_keep_monthly: 4
+restic_policy_backup_frequency: hourly
+```
+
+**Note:** `restic_policy_backup_frequency` must conform to `systemd`s
+`OnCalendar` syntax, which can be checked using `systemd-analyze calender $x`.
+
+## Role behaviour
+
+Per default, when the systemd unit for a job changes, the job is not immediately
+started. This can be overridden using `restic_start_job_on_unit_change: true`,
+which will immediately start the backup job if it's configuration changed.
+
+The systemd unit runs with `restic_user`, which is root by default, guaranteeing
+that filesystem paths are always readable. The `restic_user` can be overridden,
+but care needs to be taken to ensure the user has permission to read all the
+provided filesystem paths / the backup command may be executed by the user.
+
+If ansible should create the user, set `restic_create_user` to `true`, which
+will attempt to create the `restic_user` as a system user.
+
+### Installing
+
+For Debian and RedHat, the role attempts to install restic using the default
+package manager's ansible module (apt/dnf). For other distributions, the generic
+`package` module tries to install `restic_package_name` (default: `restic`),
+which can be overridden if needed.

roles/restic/defaults/main.yml

@@ -0,0 +1,60 @@
+---
+
+restic_repo_url: ~
+restic_repo_password: ~
+restic_s3_key_id: ~
+restic_s3_access_key: ~
+
+restic_backup_paths: []
+restic_backup_stdin_command: ~
+restic_backup_stdin_command_filename: ~
+
+restic_policy_keep_all_within: 1d
+restic_policy_keep_hourly: 12
+restic_policy_keep_daily: 7
+restic_policy_keep_weekly: 6
+restic_policy_keep_monthly: 6
+restic_policy_keep_yearly: 5
+restic_policy_backup_frequency: hourly
+
+restic_base_environment:
+  RESTIC_JOBNAME: "{{ restic_job_name | default('unknown') }}"
+  RESTIC_FORGET_KEEP_WITHIN: "{{ restic_policy_keep_all_within }}"
+  RESTIC_FORGET_KEEP_HOURLY: "{{ restic_policy_keep_hourly }}"
+  RESTIC_FORGET_KEEP_DAILY: "{{ restic_policy_keep_daily }}"
+  RESTIC_FORGET_KEEP_WEEKLY: "{{ restic_policy_keep_weekly }}"
+  RESTIC_FORGET_KEEP_MONTHLY: "{{ restic_policy_keep_monthly }}"
+  RESTIC_FORGET_KEEP_YEARLY: "{{ restic_policy_keep_yearly }}"
+
+restic_s3_environment:
+  AWS_ACCESS_KEY_ID: "{{ restic_s3_key_id }}"
+  AWS_SECRET_ACCESS_KEY: "{{ restic_s3_access_key }}"
+
+restic_complete_environment: >-
+  {{
+    restic_base_environment
+    | combine((restic_s3_environment
+      if (restic_s3_key_id and restic_s3_access_key) else {}) | default({}))
+    | combine(restic_environment | default({}))
+  }}
+
+restic_policy:
+  keep_within: "{{ restic_policy_keep_all_within }}"
+  hourly: "{{ restic_policy_keep_hourly }}"
+  daily: "{{ restic_policy_keep_daily }}"
+  weekly: "{{ restic_policy_keep_weekly }}"
+  monthly: "{{ restic_policy_keep_monthly }}"
+  yearly: "{{ restic_policy_keep_yearly }}"
+  frequency: "{{ restic_policy_backup_frequency }}"
+
+restic_user: root
+restic_create_user: false
+restic_start_job_on_unit_change: false
+
+restic_job_name: ~
+restic_job_description: "Restic backup job for {{ restic_job_name }}"
+restic_systemd_unit_naming_scheme: "restic.{{ restic_job_name }}"
+restic_systemd_working_directory: /tmp
+restic_systemd_syslog_identifier: "restic-{{ restic_job_name }}"
+
+restic_package_name: restic

roles/restic/handlers/main.yml

@@ -0,0 +1,13 @@
+---
+
+- name: Ensure system daemon is reloaded
+  listen: reload-systemd
+  systemd:
+    daemon_reload: true
+
+- name: Ensure systemd service for '{{ restic_job_name }}' is started immediately
+  listen: trigger-restic
+  systemd:
+    name: "{{ restic_systemd_unit_naming_scheme }}.service"
+    state: started
+  when: restic_start_job_on_unit_change

roles/restic/tasks/main.yml

@@ -0,0 +1,77 @@
+---
+
+- name: Ensure {{ restic_user }} system user exists
+  user:
+    name: "{{ restic_user }}"
+    state: present
+    system: true
+  when: restic_create_user
+
+- name: Ensure either backup_paths or backup_stdin_command is populated
+  when: restic_backup_paths|length > 0 and restic_backup_stdin_command and false
+  fail:
+    msg: "Setting both `restic_backup_paths` and `restic_backup_stdin_command` is not supported"
+
+- name: Ensure a filename for stdin_command backup is given
+  when: restic_backup_stdin_command and not restic_backup_stdin_command_filename
+  fail:
+    msg: "`restic_backup_stdin_command` was set but no filename for the resulting output was supplied in `restic_backup_stdin_command_filename`"
+
+- name: Ensure backup frequency adheres to systemd's OnCalender syntax
+  command:
+    cmd: "systemd-analyze calendar {{ restic_policy.frequency }}"
+  register: systemd_calender_parse_res
+  failed_when: systemd_calender_parse_res.rc != 0
+  changed_when: false
+
+- name: Ensure restic is installed
+  block:
+    - name: Ensure restic is installed via apt
+      apt:
+        package: restic
+        state: latest
+      when: ansible_os_family == 'Debian'
+    - name: Ensure restic is installed via dnf
+      dnf:
+        name: restic
+        state: latest
+      when: ansible_os_family == 'RedHat'
+    - name: Ensure restic is installed using the auto-detected package-manager
+      package:
+        name: "{{ restic_package_name }}"
+        state: present
+      when: ansible_os_family not in ['RedHat', 'Debian']
+
+- name: Ensure systemd service file for '{{ restic_job_name }}' is templated
+  template:
+    dest: "/etc/systemd/system/{{ restic_systemd_unit_naming_scheme }}.service"
+    src: restic.service.j2
+    owner: root
+    group: root
+    mode: 0640
+  notify:
+    - reload-systemd
+    - trigger-restic
+
+- name: Ensure systemd service file for '{{ restic_job_name }}' is templated
+  template:
+    dest: "/etc/systemd/system/{{ restic_systemd_unit_naming_scheme }}.timer"
+    src: restic.timer.j2
+    owner: root
+    group: root
+    mode: 0640
+  notify:
+    - reload-systemd
+
+- name: Flush handlers to ensure systemd knows about '{{ restic_job_name }}'
+  meta: flush_handlers
+
+- name: Ensure systemd timer for '{{ restic_job_name }}' is activated
+  systemd:
+    name: "{{ restic_systemd_unit_naming_scheme }}.timer"
+    enabled: true
+
+- name: Ensure systemd timer for '{{ restic_job_name }}' is started
+  systemd:
+    name: "{{ restic_systemd_unit_naming_scheme }}.timer"
+    state: started

roles/restic/templates/restic.service.j2

@@ -0,0 +1,51 @@
+[Unit]
+Description={{ restic_job_description }}
+
+[Service]
+Type=simple
+User={{ restic_user }}
+WorkingDirectory={{ restic_systemd_working_directory }}
+SyslogIdentifier={{ restic_systemd_syslog_identifier }}
+
+Environment=RESTIC_REPOSITORY={{ restic_repo_url }}
+Environment=RESTIC_PASSWORD={{ restic_repo_password }}
+{% for kv in restic_complete_environment | dict2items %}
+Environment={{ kv.key }}={{ kv.value }}
+{% endfor %}
+
+{% if restic_init | default(true) %}
+ExecStartPre=-/bin/sh -c '/usr/bin/restic snapshots || /usr/bin/restic init'
+{% endif %}
+{% if restic_unlock_before_backup | default(false) %}
+ExecStartPre=-/bin/sh -c 'sleep 3 && /usr/bin/restic unlock'
+{% endif %}
+{% if restic_backup_pre_hook | default(false) %}
+ExecStartPre=-{{ restic_backup_pre_hook }}
+{% endif %}
+{% if restic_backup_stdin_command %}
+ExecStart=/bin/sh -c '{{ restic_backup_stdin_command }} | /usr/bin/restic backup \
+	--retry-lock {{ restic_retry_lock | default('5m') }} \
+	--verbose --stdin \
+	--stdin-filename {{ restic_backup_stdin_command_filename }}'
+{% else %}
+ExecStart=/opt/restic-backup-directories.sh {{ restic_backup_paths | join(' ') }}
+{% endif %}
+{% if restic_forget_prune | default(true) %}
+ExecStartPost=/usr/bin/restic forget --prune \
+	--retry-lock {{ restic_retry_lock | default('5m') }} \
+	--keep-within={{ restic_policy.keep_within }} \
+	--keep-hourly={{ restic_policy.hourly }} \
+	--keep-daily={{ restic_policy.daily }} \
+	--keep-weekly={{ restic_policy.weekly }} \
+	--keep-monthly={{ restic_policy.monthly }} \
+	--keep-yearly={{ restic_policy.yearly }}
+{% endif %}
+{% if restic_list_snapshots | default(true) %}
+ExecStartPost=-/usr/bin/restic snapshots --retry-lock {{ restic_retry_lock | default('5m') }}
+{% endif %}
+{% if restic_backup_post_hook | default(false) %}
+ExecStartPost=-{{ restic_backup_post_hook }}
+{% endif %}
+{% if restic_check | default(true) %}
+ExecStartPost=/usr/bin/restic check --retry-lock {{ restic_retry_lock | default('5m') }}
+{% endif %}

roles/restic/templates/restic.timer.j2

@@ -0,0 +1,9 @@
+[Unit]
+Description=Run {{ restic_timer_description | default(restic_job_name) }}
+
+[Timer]
+OnCalendar={{ restic_policy.frequency }}
+Unit={{ restic_systemd_unit_naming_scheme }}.service
+
+[Install]
+WantedBy=timers.target