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The Watchman

The world around us is constantly changing, and so is Home Assistant. How often have you found yourself in a situation where your automations stopped working because some entities became permanently unavailable or actions changed their names? Some integrations can easily change the name of its actions and sensors they expose to Home Assistant. The watchman is an attempt to control such unwelcome changes and enable you to react proactively before any critical automation gets broken.

Discussion on Home Assistant Community Forum

Quick start

1. Go to the "Integrations" section on HACS, click "Explore and download repositories" and search for "watchman", then click "Download this repository with HACS".
2. Restart Home Assistant, go to Settings->Devices & Services->Add Integration and select Watchman integration. If integration not found, try to empty your browser cache and reload page.
3. Go to Developer Tools -> Actions, type watchman and select Watchman: report action then press "Perform Action" button. Check watchman_report.txt file in your configuration directory.

Refer to the Configuration section for further fine-tuning.

What does it do

The Watchman is a custom integration for Home Assistant that collects all entities (sensors, timers, input_selects, etc.) mentioned in your YAML configuration files, as well as all actions. It checks the actual state of each entity one by one and reports those that are unavailable or missing. For actions, it verifies their availability in the Home Assistant actions registry. The report can be stored as a nicely formatted text table or sent via your chosen notification method (unless the notification method itself is missing :smile:). Check out an example of a report below.

The integration has very simple internals. It knows nothing about complex relationships and dependencies among YAML configuration files, nor about the semantics of entities and automations. It parses YAML files line by line and tries to guess references either to an entity or an action based on regular expression heuristics. This means the integration can produce both false positives (when it looks like a duck, but is not) and false negatives (when some entity in a configuration file is not detected by the integration). To ignore false positives, the Ignored entities and actions parameter can be used (see Configuration section below). Improvements for false negatives are a goal for future releases.

What is does not do

The Watchman will not report every unavailable or unknown entities within your system — only those that are actively used by Home Assistant, whether it is an automations, dashboard configuration, template sensor, etc.

Configuration Options

Integration settings are available in Settings->Devices & Services->Watchman->Configure

Ignored files option example

• Ignore a file: */automations.yaml
• Ignore all files in the folder: /config/esphome/*
• Ignore several folders: /config/custom_components/*, /config/appdaemon/*, /config/www/* <img src="https://raw.githubusercontent.com/dummylabs/thewatchman/main/images/ignored_files_ui.png" width=50%>

Ignored entities and actions example

• Ignore an entity: person.dummylabs
• Ignore everything in sensor domain: sensor.*
• Ignore any entity/action which name ends with "_ble": *.*_ble

Report Action Parameters

The text version of the report can be generated using watchman.report action from Developer Tools UI, an automation or a script. Default location is /config/thewatchman_report.txt, which can be changed in the UI configuration. A long report can be split into several messages (chunks) due to limitations imposed by some notification actions (e.g., telegram). Action behaviour can be altered with additional optional parameters:

[!NOTE] Versions prior to 0.6.4 had report parameter named service, now it is renamed to action. Old parameter name still supported to preserve compatibilty with existing automations.

A useless example sending report as persitent notification

action: watchman.report
data:
  parse_config: true
  action: persistent_notification.create
  data:
    title: Watchman Report
  chunk_size: 3500
  create_file: true`

Sensors

[!NOTE] Versions prior to 0.6.4 had a sensor named sensor.watchman_missing_services. Latest versions use another name: sensor.watchman_missing_actions if integration was installed from scratch (new user). Existing users who upgraded from previous versions will have old sensor name to preserve compatibilty with their scripts and dashboards. They can rename sensor themselves or just remove integration and install it again.

Besides of the report, integration provides a few sensors which can be used within automations or dashboards:

• sensor.watchman_missing_entities
• sensor.watchman_missing_actions
• sensor.watchman_last_updated

Example of a watchman report

Please note that the ASCII table format is only used when report is saved to a file. For notification actions watchman uses plain text list due to presentation limitations.

-== WATCHMAN REPORT ==-

-== Missing 1 action(s) from 38 found in your config:
+--------------------------------+---------+------------------------------------------+
| Action                         | State   | Location                                 |
+--------------------------------+---------+------------------------------------------+
| xiaomi_miio.vacuum_goto        | missing | automations.yaml:599,605                 |
+--------------------------------+---------+------------------------------------------+

-== Missing 3 entity(ies) from 216 found in your config:
+--------------------------------+---------+------------------------------------------+
| Entity                         | State   | Location                                 |
+--------------------------------+---------+------------------------------------------+
| sensor.stats_pm25_10_median    | unavail | customize.yaml:14                        |
| sensor.xiaomi_miio_sensor      | unavail | automations.yaml:231,1348                |
| vacuum.roborock_s5max          | unavail | automations.yaml:589,603,610,1569        |
+--------------------------------+---------+------------------------------------------+

-== Report created on 03 Feb 2022 17:18:55
-== Parsed 200 files in 0.96s., ignored 66 files
-== Generated in: 0.01s. Validated in: 0.00s.

The legend at the bottom of the report shows time consumed by 3 coherent stages: parse configuration files, validate each entity/action state and generate text version of the report.

Markdown card example

Watchman sensors sensor.watchman_missing_entities and sensor.watchman_missing_actions have additional set of attributes which makes it possible to create your own report using a lovelace card. Below is an example of missing entities report for the Lovelace markdown card.

[!NOTE] For dark mode replace /icon.png to /dark_logo.png.

type: markdown
content: >-
  <h2> <img src="https://brands.home-assistant.io/watchman/icon.png" alt="WM Logo" width="32" height="32"> Watchman report</h2>
  <h3>Missing Entities: {{ states.sensor.watchman_missing_entities.state }} </h3>
  {%- for item in state_attr("sensor.watchman_missing_entities", "entities") %}
  <hr> <table><tr> <td>
  <ha-icon icon='mdi:
  {%- if item.state=="missing"-%}cloud-alert'
  {%- elif item.state=="unavail" -%}cloud-off-outline' {%- else-%}cloud-question'
  {%- endif -%} ></ha-icon>
  {{ item.id }} [{{item.state}}] <a title="{{item.occurrences}}">
  {{item.occurrences.split('/')[-1].split(':')[0]}}</a>
  </td></tr></table>
  {%- endfor %}
card_mod:
  style:
    ha-markdown:
      $: |
        ha-markdown-element:first-of-type hr{
          border-color: #303030;
        }

Important considerations:

1. Make sure you are in code editor mode before pasting this code into the markdown card
2. card_mod section is optional and requires a custom lovelace card to be installed for extra styling
3. Put mouse pointer over a file name to see full path to a file and line numbers
4. To display line numbers in the report just remove .split(':')[0] from the card template

The code for the actions report looks very similar:

type: markdown
content: >-
  <h2> <img src="https://brands.home-assistant.io/watchman/icon.png" alt="WM Logo" width="32" height="32"> Watchman report</h2>
  <h3> Missing actions: {{ states.sensor.watchman_missing_actions.state }} </h3>
  {%- for item in state_attr("sensor.watchman_missing_actions", "entities") %}
  <hr><table><tr> <td>  <ha-icon icon='mdi:cloud-alert'></ha-icon> {{ item.id }}
  <a title="{{item.occurrences}}">{{item.occurrences.split('/')[-1].split(':')[0]}}</a>
  </td></tr></table>
  {%- endfor %}
card_mod:
  style:
    ha-markdown:
      $: |
        ha-markdown-element:first-of-type hr{
          border-color: #303030;
        }