Monocker

Monitors Docker (MONitors dOCKER) containers and alerts on 'state' change.

Features

• Monitors 'state' changes for all containers
• Specific inclusions or exclusions of containers to monitor
• Optionally, only alert on state changes to (paused, exited, running (unhealthy), or dead)
• In-built Docker healthcheck

Integration with

• Telegram
• Pushbullet
• Pushover
• Discord
• Ntfy
• Slack
• Gotify
• Matrix
• Apprise

Future Considerations

• Additional messaging platform support

Installation

services:
monocker:
container_name: monocker
image: petersem/monocker
environment:
#DOCKER_HOST: tcp://docker-socket-proxy:2375
SERVER_LABEL: 'Your server name'
SERVER_AVATAR: 'https://content.invisioncic.com/u329766/monthly_2024_05/monocker.png.ba5ffdb390b627097d2a53645cf87350.png'
MESSAGE_PLATFORM: 'gotify@server@app_token'
ONLY_OFFLINE_STATES: 'false'
EXCLUDE_EXITED: 'false' PERIOD: 30
DISABLE_STARTUP_MSG: 'false'
#CUSTOM_NTFY_SERVER: 'https://custom.ntfy.com' #NTFY_USER: 'user' #NTFY_PASS: 'password' SHA: 'false'
volumes:
- /var/run/docker.sock:/var/run/docker.sock:ro
restart: unless-stopped

Environment Options

Item	Required	Description
DOCKER_HOST	False	Use a docker interface other than the default. (E.G DOCKER_HOST: tcp://docker-socket-proxy:2375)

• This can be a UNIX socket (unix://), Windows named pipe (npipe://) or TCP connection (tcp://). If it's a pipe or socket, be sure to mount the connection as a volume. If the connection is proxied, ensure that GET requests are allowed on the /containers endpoint.
• By default, this value is unset and the connection will use /var/run/docker.sock.

Item	Required	Description
SERVER_LABEL	False	Label to preface messages. Handy if you are running multiple versions of Monocker.
SERVER_AVATAR	False	Avatar image URL to add to messages. Handy if you are running Monocker on different machines (discord, ntfy mobile, and slack)
ONLY_OFFLINE_STATES	False	When true, only notify when a container state changes to paused, exited, running (unhealthy), or dead. Otherwise, all state changes are notified (false)
EXCLUDE_EXITED	False	Regardless of any other settings, you can ignore or include the status of 'exited'. (false includes exited)
PERIOD	False	Set the poll period in seconds. Default/Minimum is 10 seconds, recommended 30 seconds, to minimise messages sent.
DISABLE_STARTUP_MSG	False	Suppresses startup messages from being sent. Default is false
SHA	False	Will include the container SHA ID in sent messages
MESSAGE_PLATFORM	True	Specify 'ONE' messaging platform.

• 'pushbullet@your_api_key@your_device_id'
• 'pushover@your_user_key@your_app_api_token'
• 'discord@webhook_url'
• 'ntfy@topic_title'
• 'slack@bot_user_oauth_token@your_chat_id'
• 'gotify@server_url@app_token'
• 'telegram@your_bot_id@your_chat_id'
• 'apprise@apprise_url@config_id@tag' (Only one tag is supported, and server_avatar is not currently supported)
• 'matrix@https://matrix.org@user:matrix.org@access-token@room-id:matrix.org' (For Matrix, add the userid 'without' the leading @ sign. Values are server, userid, access-token, room-id)

Advanced NTFY Setting

Use these settings if you host your own Ntfy server, or otherwise require authentication to connect.

Item	Required	Description
CUSTOM_NTFY_SERVER	False	The URL for your self-hosted Ntfy server (Else will use https://nttp.sh)
NTFY_USER	False	The username to login (on ntfy.sh or your own server. Optional if you have your own server open)
NTFY_PASS	False	The password to login (on ntfy.sh or your own server)

Item	Required	Description
LABEL_ENABLE	False	Includes or excludes specified containers, if labelled. (defaults to false)

This feature allows you to specify (with labels in your yaml) 'either' to monitor or exclude specific containers.

• If it is set to false, then all containers will be monitored, except for any containers with the following label:

 labels:
monocker.enable: 'false'

• If it is set to true, only containers with the following label will be monitored

 labels:
monocker.enable: 'true'

• If you just want to monitor everything, then set LABEL_ENABLE: 'false' or just leave it out altogether, and dont worry about labelling any other containers.

Help with MESSAGE_PLATFORM values

• For Telegram: See video and use this link for how to obtain ID values. https://api.telegram.org/bot{bot-id}/getUpdates
• For Pushbullet: Open Pushbullet in a browser and get device ID from URL Example
• For Pushover: Login to Pushover in a browser to see details for user key and app token
• For Discord: See Discord doco for how to create a webhook and get the url
• For Slack: See documentation for how to obtain ID values.
• For Ntfy: create a new topic on https://ntfy.sh/app (or your own server), use the name of the topic as follows: ntfy@MY_TOPIC_TITLE
• For Apprise: please review official documentation. here
• For Matrix, review these images for how to get userID, roomID, and Access token

Thank you!

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Primary support on Discord Link to code on GitHub

This application uses semantic versioning. See here for more details.