joephein 6db2908d69 Fixed one more spelling issue in the new UptimeRobot example

2022-08-31 08:47:22 +02:00

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Examples

There are a million ways to use ntfy, but here are some inspirations. I try to collect examples on GitHub, so be sure to check those out, too.

!!! info Many of these examples were contributed by ntfy users. If you have other examples of how you use ntfy, please create a pull request, and I'll happily include it. Also note, that I cannot guarantee that all of these examples are functional. Many of them I have not tried myself.

Cronjobs

ntfy is perfect for any kind of cronjobs or just when long processes are done (backups, pipelines, rsync copy commands, ...).

I started adding notifications pretty much all of my scripts. Typically, I just chain the curl call directly to the command I'm running. The following example will either send Laptop backup succeeded or ⚠️ Laptop backup failed directly to my phone:

rsync -a root@laptop /backups/laptop \
  && zfs snapshot ... \
  && curl -H prio:low -d "Laptop backup succeeded" ntfy.sh/backups \
  || curl -H tags:warning -H prio:high -d "Laptop backup failed" ntfy.sh/backups

Here's one for the history books. I desperately want the github.com/ntfy organization, but all my tickets with GitHub have been hopeless. In case it ever becomes available, I want to know immediately.

# Check github/ntfy user
*/6 * * * * if curl -s https://api.github.com/users/ntfy | grep "Not Found"; then curl -d "github.com/ntfy is available" -H "Tags: tada" -H "Prio: high" ntfy.sh/my-alerts; fi

Low disk space alerts

Here's a simple cronjob that I use to alert me when the disk space on the root disk is running low. It's simple, but effective.

#!/bin/bash

mingigs=10
avail=$(df | awk '$6 == "/" && $4 < '$mingigs' * 1024*1024 { print $4/1024/1024 }')
topicurl=https://ntfy.sh/mytopic

if [ -n "$avail" ]; then
  curl \
    -d "Only $avail GB available on the root disk. Better clean that up." \
    -H "Title: Low disk space alert on $(hostname)" \
    -H "Priority: high" \
    -H "Tags: warning,cd" \
    $topicurl
fi

Years ago my home server was broken into. That shook me hard, so every time someone logs into any machine that I own, I now message myself. Here's an example of how to use PAM to notify yourself on SSH login.

=== "/etc/pam.d/sshd" # at the end of the file session optional pam_exec.so /usr/bin/ntfy-ssh-login.sh

=== "/usr/bin/ntfy-ssh-login.sh" bash #!/bin/bash if [ "${PAM_TYPE}" = "open_session" ]; then curl \ -H prio:high \ -H tags:warning \ -d "SSH login: ${PAM_USER} from ${PAM_RHOST}" \ ntfy.sh/alerts fi

Collect data from multiple machines

The other day I was running tasks on 20 servers, and I wanted to collect the interim results as a CSV in one place. Each of the servers was publishing to a topic as the results completed (publish-result.sh), and I had one central collector to grab the results as they came in (collect-results.sh).

It looked something like this:

=== "collect-results.sh" bash while read result; do [ -n "$result" ] && echo "$result" >> results.csv done < <(stdbuf -i0 -o0 curl -s ntfy.sh/results/raw) === "publish-result.sh" ```bash // This script was run on each of the 20 servers. It was doing heavy processing ...

// Publish script results
curl -d "$(hostname),$count,$time" ntfy.sh/results
```

Ansible, Salt and Puppet

You can easily integrate ntfy into Ansible, Salt, or Puppet to notify you when runs are done or are highstated. One of my co-workers uses the following Ansible task to let him know when things are done:

- name: Send ntfy.sh update
  uri:
    url: "https://ntfy.sh/{{ ntfy_channel }}"
    method: POST
    body: "{{ inventory_hostname }} reseeding complete"

Watchtower (shoutrrr)

You can use shoutrrr generic webhook support to send Watchtower notifications to your ntfy topic.

Example docker-compose.yml:

services:
  watchtower:
    image: containrrr/watchtower
    environment:
      - WATCHTOWER_NOTIFICATIONS=shoutrrr
      - WATCHTOWER_NOTIFICATION_URL=generic+https://ntfy.sh/my_watchtower_topic?title=WatchtowerUpdates

Or, if you only want to send notifications using shoutrrr:

shoutrrr send -u "generic+https://ntfy.sh/my_watchtower_topic?title=WatchtowerUpdates" -m "testMessage"

Sonarr, Radarr, Lidarr, Readarr, Prowlarr, SABnzbd

It's possible to use custom scripts for all the *arr services, plus SABnzbd. Notifications for downloads, warnings, grabs etc. Some simple bash scripts to achieve this are kindly provided in nickexyz's repository.

Node-RED

You can use the HTTP request node to send messages with Node-RED, some examples:

Example: Send a message (click to expand)

[
    {
        "id": "c956e688cc74ad8e",
        "type": "http request",
        "z": "fabdd7a3.4045a",
        "name": "ntfy.sh",
        "method": "POST",
        "ret": "txt",
        "paytoqs": "ignore",
        "url": "https://ntfy.sh/mytopic",
        "tls": "",
        "persist": false,
        "proxy": "",
        "authType": "",
        "senderr": false,
        "credentials":
        {
            "user": "",
            "password": ""
        },
        "x": 590,
        "y": 3160,
        "wires":
        [
            []
        ]
    },
    {
        "id": "32ee1eade51fae50",
        "type": "function",
        "z": "fabdd7a3.4045a",
        "name": "data",
        "func": "msg.payload = \"Something happened\";\nmsg.headers = {};\nmsg.headers['tags'] = 'house';\nmsg.headers['X-Title'] = 'Home Assistant';\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 470,
        "y": 3160,
        "wires":
        [
            [
                "c956e688cc74ad8e"
            ]
        ]
    },
    {
        "id": "b287e59cd2311815",
        "type": "inject",
        "z": "fabdd7a3.4045a",
        "name": "Manual start",
        "props":
        [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": "20",
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 330,
        "y": 3160,
        "wires":
        [
            [
                "32ee1eade51fae50"
            ]
        ]
    }
]

Example: Send a picture (click to expand)

[
    {
        "id": "d135a13eadeb9d6d",
        "type": "http request",
        "z": "fabdd7a3.4045a",
        "name": "Download image",
        "method": "GET",
        "ret": "bin",
        "paytoqs": "ignore",
        "url": "https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png",
        "tls": "",
        "persist": false,
        "proxy": "",
        "authType": "",
        "senderr": false,
        "credentials":
        {
            "user": "",
            "password": ""
        },
        "x": 490,
        "y": 3320,
        "wires":
        [
            [
                "6e75bc41d2ec4a03"
            ]
        ]
    },
    {
        "id": "6e75bc41d2ec4a03",
        "type": "function",
        "z": "fabdd7a3.4045a",
        "name": "data",
        "func": "msg.payload = msg.payload;\nmsg.headers = {};\nmsg.headers['tags'] = 'house';\nmsg.headers['X-Title'] = 'Home Assistant - Picture';\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 650,
        "y": 3320,
        "wires":
        [
            [
                "eb160615b6ceda98"
            ]
        ]
    },
    {
        "id": "eb160615b6ceda98",
        "type": "http request",
        "z": "fabdd7a3.4045a",
        "name": "ntfy.sh",
        "method": "PUT",
        "ret": "bin",
        "paytoqs": "ignore",
        "url": "https://ntfy.sh/mytopic",
        "tls": "",
        "persist": false,
        "proxy": "",
        "authType": "",
        "senderr": false,
        "credentials":
        {
            "user": "",
            "password": ""
        },
        "x": 770,
        "y": 3320,
        "wires":
        [
            []
        ]
    },
    {
        "id": "5b8dbf15c8a7a3a5",
        "type": "inject",
        "z": "fabdd7a3.4045a",
        "name": "Manual start",
        "props":
        [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": "20",
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 310,
        "y": 3320,
        "wires":
        [
            [
                "d135a13eadeb9d6d"
            ]
        ]
    }
]

Gatus

An example for a custom alert with Gatus:

alerting:
  custom:
    url: "https://ntfy.sh"
    method: "POST"
    body: |
      {
        "topic": "mytopic",
        "message": "[ENDPOINT_NAME] - [ALERT_DESCRIPTION]",
        "title": "Gatus",
        "tags": ["[ALERT_TRIGGERED_OR_RESOLVED]"],
        "priority": 3
      }      
    default-alert:
      enabled: true
      description: "health check failed"
      send-on-resolved: true
      failure-threshold: 3
      success-threshold: 3
    placeholders:
      ALERT_TRIGGERED_OR_RESOLVED:
        TRIGGERED: "warning"
        RESOLVED: "white_check_mark"

Jellyseerr/Overseerr webhook

Here is an example for jellyseerr/overseerr webhook JSON payload. Remember to change the https://requests.example.com to your jellyseerr/overseerr URL.

{
    "topic": "requests",
    "title": "{{event}}",
    "message": "{{subject}}\n{{message}}\n\nRequested by: {{requestedBy_username}}\n\nStatus: {{media_status}}\nRequest Id: {{request_id}}",
    "priority": 4,
    "attach": "{{image}}",
    "click": "https://requests.example.com/{{media_type}}/{{media_tmdbid}}"
}

Home Assistant

Here is an example for the configuration.yml file to setup a REST notify component. Since Home Assistant is going to POST JSON, you need to specify the root of your ntfy resource.

notify:
  - name: ntfy
    platform: rest
    method: POST_JSON
    data:
      topic: YOUR_NTFY_TOPIC
    title_param_name: title
    message_param_name: message
    resource: https://ntfy.sh

If you need to authenticate to your ntfy resource, define the authentication, username and password as below:

notify:
  - name: ntfy
    platform: rest
    method: POST_JSON
    authentication: basic
    username: YOUR_USERNAME
    password: YOUR_PASSWORD
    data:
      topic: YOUR_NTFY_TOPIC
    title_param_name: title
    message_param_name: message
    resource: https://ntfy.sh

If you need to add any other ntfy specific parameters such as priority, tags, etc., add them to the data array in the example yml. For example:

notify:
  - name: ntfy
    platform: rest
    method: POST_JSON
    data:
      topic: YOUR_NTFY_TOPIC
      priority: 4
    title_param_name: title
    message_param_name: message
    resource: https://ntfy.sh

Uptime Kuma

Go to your Uptime Kuma Settings > Notifications, click on Setup Notification. Then set your desired title (e.g. "Uptime Kuma"), ntfy topic, Server URL and priority (1-5):

You can now test the notifications and apply them to monitors:

UptimeRobot

Go to your UptimeRobot My Settings > Alert Contacts > Add Alert Contact Select Alert Contact Type = Webhook. Then set your desired Friendly Name (e.g. "ntfy-sh-UP"), URL to Notify, POST value and select checkbox Send as JSON (application/json). Make sure to send the JSON POST request to ntfy.domain.com without the topic name in the url and include the "topic" name in the JSON body.

{
    "topic":"myTopic",
    "title": "*monitorFriendlyName* *alertTypeFriendlyName*",
    "message": "*alertDetails*", 
    "tags": ["green_circle"],
    "priority": 3,
    "click": https://uptimerobot.com/dashboard#*monitorID*
}

You can create two Alert Contacts each with a different icon and priority, for example:

{
    "topic":"myTopic",
    "title": "*monitorFriendlyName* *alertTypeFriendlyName*",
    "message": "*alertDetails*", 
    "tags": ["red_circle"],
    "priority": 3,
    "click": https://uptimerobot.com/dashboard#*monitorID*
}

You can now add the Alerts Contact(s) to the monitors and test the notifications:

Apprise

ntfy is integrated natively into Apprise (also check out the Apprise/ntfy wiki page).

You can use it like this:

apprise -vv -t "Test Message Title" -b "Test Message Body" \
   ntfy://mytopic

Or with your own server like this:

apprise -vv -t "Test Message Title" -b "Test Message Body" \
   ntfy://ntfy.example.com/mytopic

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