Need ideas - Calculating HA restart time

Configuration
21

Has anyone came up with a complete solution?

22

This is what I use. I get this via telegram:

Home Assistant Shutdown
Sunday at 01:23:04 PM

Home Assistant Startup
Sunday at 01:24:04 PM
Restart took: 59.9 seconds.

notify:
  - name: shutdowns_log
    platform: file
    filename: shutdowns.log
  - name: restart_times_log
    platform: file
    filename: restart_times.log

sensor:
  - platform: file
    name: Last Shutdown Timestamp
    file_path: shutdowns.log
    value_template: "{{ value.split(' ')[0] }}"
  - platform: file
    name: Restart Time
    file_path: restart_times.log
    value_template: "{{ value.split(' ')[0] }}"
    unit_of_measurement: s

automation:
  - id: Shutdown Notification
    alias: Shutdown Notification
    trigger:
      - platform: homeassistant
        event: shutdown
    action:
      - service: notify.shutdowns_log
        data:
          message: "{{ now().timestamp() }} Shutdown"
      - service: script.communicate_log
        data:
          title: Home Assistant Shutdown
          message: " {{ now().strftime('%A at %r') }} "

  - id: Startup Notification
    alias: Startup Notification
    trigger:
      - platform: homeassistant
        event: start
    action:
      - service: notify.restart_times_log
        data:
          message: "{{ (now().timestamp() - states.sensor.last_shutdown_timestamp.state | float) | round(1) }} Restart Time"
      - service: script.communicate_log
        data:
          title: Home Assistant Startup
          message: | 
            {{ now().strftime('%A at %r') }}
            Restart took: {{ (now().timestamp() - states.sensor.last_shutdown_timestamp.state | float) | round(1) }} seconds.

recorder:
  include:
    entities:
    - sensor.restart_time
23

It might be easier to understand if I show the contents of the two log files:

shutdowns.log:

1621119776.465644 Shutdown
1621120391.125334 Shutdown
1621121079.836683 Shutdown
1621121659.466762 Shutdown
1621136335.858423 Shutdown
1621141537.6622 Shutdown
1621141831.100703 Shutdown
1621142584.379932 Shutdown

restart_times.log:

58.2 Restart Time
60.4 Restart Time
46.6 Restart Time
48.8 Restart Time
70.0 Restart Time
65.8 Restart Time
55.2 Restart Time
62.5 Restart Time
59.9 Restart Time
24

I cant recall whether James posted the config here, or he sent it directly to me

It requires Node-Red and the following packages: node-red-contrib-interval-length, node-red-node-rbe

[{"id":"8fa31d33.f6d548","type":"inject","z":"fa272026.a5eb2","name":"HASS Connected?","repeat":"1","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"homeassistant.homeAssistant.isConnected","payloadType":"global","x":90,"y":1100,"wires":[["6311fbf4.a8b4f4"]]},{"id":"6311fbf4.a8b4f4","type":"rbe","z":"fa272026.a5eb2","name":"","func":"rbei","gap":"","start":"","inout":"out","property":"payload","x":340,"y":1100,"wires":[["6b4ce4b0.ad037c"]]},{"id":"6b4ce4b0.ad037c","type":"interval-length","z":"fa272026.a5eb2","format":"human","bytopic":false,"minimum":"35","maximum":"","window":"","timeout":false,"msgTimeout":"","minimumunit":"secs","maximumunit":"secs","windowunit":"msecs","msgTimeoutUnit":"msecs","reset":false,"startup":false,"msgField":"payload","timestampField":"timestamp","repeatTimeout":false,"name":"","x":570,"y":1100,"wires":[["118db764.b6fe21"],[]]},{"id":"118db764.b6fe21","type":"mqtt out","z":"fa272026.a5eb2","name":"","topic":"harestart","qos":"","retain":"true","broker":"c2d1b0f2.af1008","x":810,"y":1100,"wires":[]},{"id":"c2d1b0f2.af1008","type":"mqtt-broker","name":"MQTT Server","broker":"192.168.1.63","port":"1883","clientid":"","usetls":false,"compatmode":false,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","closeTopic":"","closeQos":"0","closePayload":"","willTopic":"","willQos":"0","willPayload":""}]
25

I am trying your solution but i have this error:

Invalid config for [sensor.file]: not a file for dictionary value @ data[‘file_path’]. Got ‘shutdowns.log’. (See ?, line ?).
Invalid config for [sensor.file]: not a file for dictionary value @ data[‘file_path’]. Got ‘restart_times.log’. (See ?, line ?).

26

You should define correct paths to log files, e.g. for supervised instance it would be something like /config/log/shutdowns.log and /config/log/restart_times.log. Also, make sure to create all needed subfolders for your paths.