Add support for NUT (EATON inverter)
This commit is contained in:
Clément Désiles
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# nut — Network UPS Tools
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Monitors a UPS over USB (or serial/network), notifies via ntfy on power events
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and gracefully shuts the host down on low battery.
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## Supported distributions
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- Arch Linux
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- Debian/Ubuntu
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## What it does
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- Installs `nut` and configures it in **standalone** mode (single host, no
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network slaves).
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- Configures the `usbhid-ups` driver against the UPS defined in `nut_ups_name`
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(default: EATON Ellipse 1600, vendorid `0463`).
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- Binds `upsd` to `127.0.0.1:3493` only — no LAN exposure.
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- Runs `upsmon` as master, which:
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- calls `SHUTDOWNCMD` (`systemctl poweroff`) on `LOWBATT`,
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- dispatches every event to a `NOTIFYCMD` wrapper that POSTs to ntfy with
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severity, tags and a host-aware title.
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## Configuration
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Variables — see [defaults/main.yml](defaults/main.yml).
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Required (role asserts at start):
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```yaml
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nut_monitor_password: "<min 12 chars>" # local upsd user used by upsmon + exporter
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nut_ntfy_topic: "ups-<host>"
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```
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Optional but commonly tweaked:
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```yaml
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nut_ups_name: eaton
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nut_ups_description: "EATON Ellipse 1600"
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nut_ups_vendorid: "0463"
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nut_ntfy_server: https://ntfy.jokester.fr
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nut_ntfy_token: "tk_..." # publish token for nut_ntfy_topic
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```
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## Operations
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### Check UPS status
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```bash
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upsc {{ nut_ups_name }}@localhost
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```
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### List configured UPSes
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```bash
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upsc -l
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```
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### Test the NOTIFYCMD pipeline without unplugging
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```bash
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sudo -u nut NOTIFYTYPE=ONBATT /usr/local/bin/ups-notify "Simulated ONBATT for ntfy plumbing test"
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```
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### Simulate a full power loss (DANGEROUS — actually powers off)
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```bash
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sudo upsmon -c fsd
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```
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### Logs
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```bash
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journalctl -u nut-monitor -u nut-server -u 'nut-driver@*' -f
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```
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## Security
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- `upsd` binds to `127.0.0.1` only.
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- `upsd.users` mode `0640` owned by `root:nut`.
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- No anonymous read access — exporter and upsmon both authenticate as
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`nut_monitor_user`.
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- udev rules shipped by the `nut` package grant USB device access to the `nut`
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group only.
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## Companion role
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See [`nut_exporter`](../nut_exporter/README.md) to expose Prometheus metrics
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based on the same upsd instance.
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@@ -0,0 +1,63 @@
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---
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# NUT (Network UPS Tools) configuration
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# See: https://networkupstools.org/docs/man/upsmon.conf.html
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# UPS definition
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# --------------
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# Logical name of the UPS as referenced everywhere (ups.conf section, upsmon
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# MONITOR line, nut_exporter ?ups= query parameter).
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nut_ups_name: eaton
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# Human-readable description (shown in upsc output).
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nut_ups_description: "EATON Ellipse 1600"
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# Driver to use. usbhid-ups covers all USB HID-compliant UPSes (EATON, APC,
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# CyberPower, etc.). See: https://networkupstools.org/stable-hcl.html
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nut_ups_driver: usbhid-ups
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# USB vendorid filter (EATON = 0463). Helps disambiguate if multiple USB HID
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# devices are present. Leave empty to auto-detect.
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nut_ups_vendorid: "0463"
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# Driver polling interval in seconds. Some Eaton/MGE units lock up if polled too
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# aggressively (the default is 2). 10-15s gives the microcontroller breathing room.
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nut_ups_pollinterval: 15
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# Number of connection attempts before the driver gives up. If the USB chip
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# freezes, the driver will try to reopen the port up to this many times.
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nut_ups_maxretry: 3
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# upsd server
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# -----------
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# Bind addresses for upsd. Keep localhost-only unless you want to monitor from
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# other hosts (in which case add the wireguard IP and adjust firewall).
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nut_upsd_listen:
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- { addr: "127.0.0.1", port: 3493 }
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# Local monitor user used by upsmon and nut_exporter. Password must be set.
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nut_monitor_user: monitor
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# nut_monitor_password: "" # Intentionally undefined - role will fail if not set
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# upsmon (shutdown manager + NOTIFYCMD dispatcher)
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# ------------------------------------------------
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# Battery charge percentage below which an early shutdown is triggered, even if
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# the UPS has not yet asserted LOWBATT. Set to 0 to rely solely on LOWBATT.
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nut_upsmon_minsupplies: 1
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nut_upsmon_pollfreq: 5 # seconds between polls when on line power
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nut_upsmon_pollfreqalert: 5 # seconds between polls when on battery
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nut_upsmon_deadtime: 15 # seconds before declaring a UPS dead
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nut_upsmon_hostsync: 15 # seconds to wait for slaves before shutting down
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nut_upsmon_finaldelay: 5 # seconds between SHUTDOWN notification and poweroff
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# Command run on the host once the master decides it is time to power off.
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# systemctl poweroff is sufficient for a single-host standalone setup.
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nut_upsmon_shutdown_cmd: "/usr/bin/systemctl poweroff"
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# ntfy notifications
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# ------------------
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# Topic to publish UPS events to. Should be a dedicated topic for power events.
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# nut_ntfy_topic: "" # Intentionally undefined - role will fail if not set
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nut_ntfy_server: https://ntfy.jokester.fr
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# nut_ntfy_token: "" # Intentionally undefined - unauthenticated if not set
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# Path of the deployed NOTIFYCMD wrapper.
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nut_notify_script_path: /usr/local/bin/ups-notify
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@@ -0,0 +1,15 @@
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---
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- name: Restart NUT driver enumerator
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ansible.builtin.systemd:
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name: nut-driver-enumerator.service
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state: restarted
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- name: Restart NUT server
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ansible.builtin.systemd:
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name: nut-server.service
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state: restarted
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- name: Restart NUT monitor
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ansible.builtin.systemd:
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name: nut-monitor.service
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state: restarted
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@@ -0,0 +1,2 @@
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---
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dependencies: []
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@@ -0,0 +1,97 @@
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---
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- name: Validate required configuration
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ansible.builtin.assert:
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that:
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- nut_monitor_password is defined
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- nut_monitor_password | length >= 12
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- nut_ntfy_topic is defined
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- nut_ntfy_topic | length > 0
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fail_msg: |
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nut_monitor_password (>=12 chars) and nut_ntfy_topic are required.
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See roles/nut/defaults/main.yml for configuration.
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- name: Load OS-specific variables
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ansible.builtin.include_vars: "{{ item }}"
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with_first_found:
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- "{{ ansible_facts['os_family'] }}.yml"
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- debian.yml
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- name: Install NUT
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ansible.builtin.package:
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name: "{{ nut_package }}"
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state: present
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- name: Ensure NUT config directory exists
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ansible.builtin.file:
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path: "{{ nut_config_dir }}"
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state: directory
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owner: root
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group: "{{ nut_group }}"
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mode: "0750"
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- name: Set NUT to standalone mode
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ansible.builtin.copy:
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dest: "{{ nut_config_dir }}/nut.conf"
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content: |
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# Managed by Ansible - DO NOT EDIT MANUALLY
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MODE=standalone
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owner: root
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group: "{{ nut_group }}"
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mode: "0640"
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notify:
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- Restart NUT driver enumerator
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- Restart NUT server
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- Restart NUT monitor
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- name: Deploy ups.conf
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ansible.builtin.template:
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src: ups.conf.j2
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dest: "{{ nut_config_dir }}/ups.conf"
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owner: root
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group: "{{ nut_group }}"
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mode: "0640"
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notify:
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- Restart NUT driver enumerator
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- Restart NUT server
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- name: Deploy upsd.conf
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ansible.builtin.template:
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src: upsd.conf.j2
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dest: "{{ nut_config_dir }}/upsd.conf"
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owner: root
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group: "{{ nut_group }}"
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mode: "0640"
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notify: Restart NUT server
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- name: Deploy upsd.users
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ansible.builtin.template:
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src: upsd.users.j2
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dest: "{{ nut_config_dir }}/upsd.users"
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owner: root
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group: "{{ nut_group }}"
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mode: "0640"
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notify: Restart NUT server
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- name: Deploy ntfy NOTIFYCMD script
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ansible.builtin.template:
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src: ups-notify.sh.j2
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dest: "{{ nut_notify_script_path }}"
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owner: root
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group: root
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mode: "0755"
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- name: Deploy upsmon.conf
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ansible.builtin.template:
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src: upsmon.conf.j2
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dest: "{{ nut_config_dir }}/upsmon.conf"
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owner: root
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group: "{{ nut_group }}"
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mode: "0640"
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notify: Restart NUT monitor
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- name: Enable and start NUT services
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ansible.builtin.systemd:
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name: "{{ item }}"
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enabled: true
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state: started
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loop: "{{ nut_services }}"
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@@ -0,0 +1,77 @@
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#!/usr/bin/env bash
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# Managed by Ansible - DO NOT EDIT MANUALLY
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#
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# Wrapper invoked by upsmon as NOTIFYCMD.
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# upsmon passes the rendered NOTIFYMSG as $1 and sets NOTIFYTYPE in the env.
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# See: https://networkupstools.org/docs/man/upsmon.conf.html
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set -euo pipefail
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NTFY_SERVER="{{ nut_ntfy_server }}"
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NTFY_TOPIC="{{ nut_ntfy_topic }}"
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{% if nut_ntfy_token is defined %}
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NTFY_TOKEN="{{ nut_ntfy_token }}"
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{% else %}
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NTFY_TOKEN=""
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{% endif %}
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MESSAGE="${1:-UPS event}"
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EVENT="${NOTIFYTYPE:-UNKNOWN}"
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HOST="$(uname -n)"
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case "$EVENT" in
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ONBATT)
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TITLE="UPS on battery — $HOST"
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PRIORITY="urgent"
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TAGS="warning,electric_plug"
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;;
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LOWBATT)
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TITLE="UPS low battery — $HOST"
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PRIORITY="urgent"
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TAGS="rotating_light,battery"
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;;
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FSD|SHUTDOWN)
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TITLE="UPS forced shutdown — $HOST"
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PRIORITY="max"
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TAGS="skull"
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;;
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ONLINE)
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TITLE="UPS back on line power — $HOST"
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PRIORITY="default"
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TAGS="white_check_mark,zap"
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;;
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COMMBAD|NOCOMM)
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TITLE="UPS communication lost — $HOST"
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PRIORITY="high"
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TAGS="warning,satellite"
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;;
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COMMOK)
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TITLE="UPS communication restored — $HOST"
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PRIORITY="default"
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TAGS="white_check_mark"
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;;
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REPLBATT)
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TITLE="UPS battery needs replacement — $HOST"
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PRIORITY="high"
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TAGS="battery,wrench"
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;;
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*)
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TITLE="UPS event ($EVENT) — $HOST"
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PRIORITY="default"
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TAGS="information_source"
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;;
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esac
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auth_args=()
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if [[ -n "$NTFY_TOKEN" ]]; then
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auth_args=(-H "Authorization: Bearer $NTFY_TOKEN")
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fi
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# --max-time is important: upsmon will hang on poweroff if curl blocks.
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curl -fsS --max-time 10 \
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"${auth_args[@]}" \
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-H "Title: $TITLE" \
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-H "Priority: $PRIORITY" \
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-H "Tags: $TAGS" \
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-d "$MESSAGE" \
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"${NTFY_SERVER%/}/${NTFY_TOPIC}" >/dev/null || \
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logger -t ups-notify "Failed to publish ntfy notification for $EVENT"
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@@ -0,0 +1,12 @@
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# Managed by Ansible - DO NOT EDIT MANUALLY
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# See: https://networkupstools.org/docs/man/ups.conf.html
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[{{ nut_ups_name }}]
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driver = {{ nut_ups_driver }}
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port = auto
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desc = "{{ nut_ups_description }}"
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pollinterval = {{ nut_ups_pollinterval }}
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maxretry = {{ nut_ups_maxretry }}
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{% if nut_ups_vendorid %}
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vendorid = {{ nut_ups_vendorid }}
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{% endif %}
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@@ -0,0 +1,6 @@
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# Managed by Ansible - DO NOT EDIT MANUALLY
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# See: https://networkupstools.org/docs/man/upsd.conf.html
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{% for listen in nut_upsd_listen %}
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LISTEN {{ listen.addr }} {{ listen.port }}
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{% endfor %}
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@@ -0,0 +1,6 @@
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# Managed by Ansible - DO NOT EDIT MANUALLY
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# See: https://networkupstools.org/docs/man/upsd.users.html
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[{{ nut_monitor_user }}]
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password = {{ nut_monitor_password }}
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upsmon master
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@@ -0,0 +1,37 @@
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# Managed by Ansible - DO NOT EDIT MANUALLY
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# See: https://networkupstools.org/docs/man/upsmon.conf.html
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MONITOR {{ nut_ups_name }}@localhost {{ nut_upsmon_minsupplies }} {{ nut_monitor_user }} {{ nut_monitor_password }} master
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MINSUPPLIES {{ nut_upsmon_minsupplies }}
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SHUTDOWNCMD "{{ nut_upsmon_shutdown_cmd }}"
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NOTIFYCMD "{{ nut_notify_script_path }}"
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POLLFREQ {{ nut_upsmon_pollfreq }}
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POLLFREQALERT {{ nut_upsmon_pollfreqalert }}
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DEADTIME {{ nut_upsmon_deadtime }}
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HOSTSYNC {{ nut_upsmon_hostsync }}
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FINALDELAY {{ nut_upsmon_finaldelay }}
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# Default notification messages (overridable per event).
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NOTIFYMSG ONLINE "UPS %s is back on line power"
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NOTIFYMSG ONBATT "UPS %s is on battery (mains lost)"
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NOTIFYMSG LOWBATT "UPS %s battery is low — shutdown imminent"
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NOTIFYMSG FSD "UPS %s forced shutdown in progress"
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NOTIFYMSG COMMOK "Communications with UPS %s restored"
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NOTIFYMSG COMMBAD "Communications with UPS %s lost"
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NOTIFYMSG SHUTDOWN "System is shutting down due to UPS %s"
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NOTIFYMSG REPLBATT "UPS %s battery needs replacement"
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NOTIFYMSG NOCOMM "UPS %s is unavailable"
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# Route events through SYSLOG and the NOTIFYCMD wrapper. NUT also supports
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# WALL (broadcast to logged-in users) but it's noisy and not useful here.
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NOTIFYFLAG ONLINE SYSLOG+EXEC
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NOTIFYFLAG ONBATT SYSLOG+EXEC
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NOTIFYFLAG LOWBATT SYSLOG+EXEC
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NOTIFYFLAG FSD SYSLOG+EXEC
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NOTIFYFLAG COMMOK SYSLOG+EXEC
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NOTIFYFLAG COMMBAD SYSLOG+EXEC
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NOTIFYFLAG SHUTDOWN SYSLOG+EXEC
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NOTIFYFLAG REPLBATT SYSLOG+EXEC
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NOTIFYFLAG NOCOMM SYSLOG+EXEC
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@@ -0,0 +1,9 @@
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---
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nut_package: nut
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nut_config_dir: /etc/nut
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nut_user: nut
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nut_group: nut
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nut_services:
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- nut-driver-enumerator.service
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- nut-server.service
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- nut-monitor.service
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@@ -0,0 +1,9 @@
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---
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nut_package: nut
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nut_config_dir: /etc/nut
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nut_user: nut
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nut_group: nut
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nut_services:
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- nut-driver-enumerator.service
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- nut-server.service
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- nut-monitor.service
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@@ -0,0 +1,60 @@
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# nut_exporter — Prometheus exporter for NUT
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Scrapes a local `upsd` and exposes UPS metrics for Prometheus.
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## Supported distributions
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||||
- Arch Linux (AUR package `prometheus-nut-exporter`, installed via `paru`)
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Debian/Ubuntu is not packaged upstream — add it on demand.
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## Configuration
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||||
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||||
See [defaults/main.yml](defaults/main.yml).
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||||
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||||
Required:
|
||||
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||||
```yaml
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||||
nut_exporter_nut_password: "<same as nut_monitor_password>"
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||||
```
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||||
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||||
Optional:
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||||
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||||
```yaml
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nut_exporter_listen_address: "127.0.0.1:9199"
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nut_exporter_nut_server: "127.0.0.1:3493"
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nut_exporter_nut_user: monitor
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||||
```
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||||
## Pairing with Prometheus
|
||||
|
||||
Typical scrape config (target uses the multi-target pattern: the exporter
|
||||
queries a remote upsd specified in the URL parameters):
|
||||
|
||||
```yaml
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||||
prometheus_scrape_configs:
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||||
- job_name: 'nut'
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||||
metrics_path: /nut
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||||
static_configs:
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||||
- targets: ['eaton@localhost'] # ups@host syntax
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||||
relabel_configs:
|
||||
- source_labels: [__address__]
|
||||
target_label: __param_target
|
||||
- source_labels: [__param_target]
|
||||
target_label: instance
|
||||
- target_label: __address__
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||||
replacement: 127.0.0.1:9199
|
||||
```
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||||
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||||
## Operations
|
||||
|
||||
```bash
|
||||
systemctl status prometheus-nut-exporter
|
||||
curl -s 'http://127.0.0.1:9199/nut?target=localhost&ups=eaton' | head
|
||||
journalctl -u prometheus-nut-exporter -f
|
||||
```
|
||||
|
||||
## Dependencies
|
||||
|
||||
Requires the [`nut`](../nut/README.md) role (or any other running upsd) on the
|
||||
same host.
|
||||
@@ -0,0 +1,13 @@
|
||||
---
|
||||
# Prometheus NUT exporter configuration
|
||||
|
||||
# Address the exporter listens on.
|
||||
nut_exporter_listen_address: "127.0.0.1:9199"
|
||||
|
||||
# upsd server to connect to (kept local — exporter sits next to upsd).
|
||||
nut_exporter_nut_server: "127.0.0.1:3493"
|
||||
|
||||
# Credentials used to log into upsd. These should match the upsd user defined
|
||||
# by the nut role (nut_monitor_user / nut_monitor_password).
|
||||
nut_exporter_nut_user: "{{ nut_monitor_user | default('monitor') }}"
|
||||
# nut_exporter_nut_password: "" # Inherits nut_monitor_password by default
|
||||
@@ -0,0 +1,9 @@
|
||||
---
|
||||
- name: Reload systemd
|
||||
ansible.builtin.systemd:
|
||||
daemon_reload: true
|
||||
|
||||
- name: Restart nut_exporter
|
||||
ansible.builtin.systemd:
|
||||
name: "{{ nut_exporter_service }}"
|
||||
state: restarted
|
||||
@@ -0,0 +1,2 @@
|
||||
---
|
||||
dependencies: []
|
||||
@@ -0,0 +1,46 @@
|
||||
---
|
||||
- name: Validate required configuration
|
||||
ansible.builtin.assert:
|
||||
that:
|
||||
- nut_exporter_nut_password is defined
|
||||
- nut_exporter_nut_password | length >= 12
|
||||
fail_msg: |
|
||||
nut_exporter_nut_password (>=12 chars) is required.
|
||||
Usually set to the same value as nut_monitor_password.
|
||||
|
||||
- name: Load OS-specific variables
|
||||
ansible.builtin.include_vars: "{{ item }}"
|
||||
with_first_found:
|
||||
- "{{ ansible_facts['os_family'] }}.yml"
|
||||
|
||||
- name: Install prometheus-nut-exporter (AUR via paru)
|
||||
ansible.builtin.command: "paru -S --noconfirm --needed {{ nut_exporter_package }}"
|
||||
register: nut_exporter_install
|
||||
changed_when: "'there is nothing to do' not in nut_exporter_install.stdout | lower"
|
||||
when: ansible_facts['os_family'] == 'Archlinux'
|
||||
|
||||
- name: Ensure systemd override directory exists
|
||||
ansible.builtin.file:
|
||||
path: "{{ nut_exporter_override_dir }}"
|
||||
state: directory
|
||||
owner: root
|
||||
group: root
|
||||
mode: "0755"
|
||||
|
||||
- name: Deploy systemd override (listen address + upsd credentials)
|
||||
ansible.builtin.template:
|
||||
src: override.conf.j2
|
||||
dest: "{{ nut_exporter_override_dir }}/override.conf"
|
||||
owner: root
|
||||
group: root
|
||||
mode: "0640"
|
||||
notify:
|
||||
- Reload systemd
|
||||
- Restart nut_exporter
|
||||
|
||||
- name: Enable and start nut_exporter
|
||||
ansible.builtin.systemd:
|
||||
name: "{{ nut_exporter_service }}"
|
||||
enabled: true
|
||||
state: started
|
||||
daemon_reload: true
|
||||
@@ -0,0 +1,10 @@
|
||||
# Managed by Ansible - DO NOT EDIT MANUALLY
|
||||
# Override for prometheus-nut-exporter to inject listen address and upsd
|
||||
# credentials. The exporter reads NUT_EXPORTER_* env vars at startup.
|
||||
|
||||
[Service]
|
||||
Environment="HTTP_LISTEN_ADDRESS={{ nut_exporter_listen_address }}"
|
||||
Environment="NUT_EXPORTER_SERVER={{ nut_exporter_nut_server.split(':')[0] }}"
|
||||
Environment="NUT_EXPORTER_PORT={{ nut_exporter_nut_server.split(':')[1] }}"
|
||||
Environment="NUT_EXPORTER_USERNAME={{ nut_exporter_nut_user }}"
|
||||
Environment="NUT_EXPORTER_PASSWORD={{ nut_exporter_nut_password }}"
|
||||
@@ -0,0 +1,6 @@
|
||||
---
|
||||
nut_exporter_package: prometheus-nut-exporter
|
||||
nut_exporter_service: prometheus-nut-exporter.service
|
||||
nut_exporter_user: nut-exporter
|
||||
nut_exporter_group: nut-exporter
|
||||
nut_exporter_override_dir: /etc/systemd/system/prometheus-nut-exporter.service.d
|
||||
Reference in New Issue
Block a user