Command

The command trigger lets you run arbitrary commands upon container update notifications.

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The command trigger lets you run arbitrary commands upon container update notifications.

Variables

Env var	Required	Description	Supported values	Default value when missing
`DD_TRIGGER_COMMAND_{trigger_name}_CMD`	🔴	The command to run
`DD_TRIGGER_COMMAND_{trigger_name}_SHELL`	🔴	The shell to use	Any valid installed shell path	`/bin/sh`
`DD_TRIGGER_COMMAND_{trigger_name}_TIMEOUT`	🔴	The command timeout (in ms)	Any positive integer (`0` means no timeout)	`60000`

This trigger also supports the common configuration variables.

Update informations are passed as environment variables (see below).

Environment variables passed to the executed command

In simple mode (execution per container to update)

display_icon
display_name
id
image_architecture
image_created
image_digest_repo
image_digest_watch
image_id
image_name
image_os
image_registry_name
image_registry_url
image_tag_semver
image_tag_value
name
result_tag
status
update_available
update_kind_kind
update_kind_local_value
update_kind_remote_value
update_kind_semver_diff
watcher

Example

display_icon='mdi:docker'
display_name='test-nginx-1'
id='94f9f845de0fc4f8ad17c0ee1aaeaf495669de229edf41cdcd14d2af7157e47e'
image_architecture='amd64'
image_created='2023-06-13T07:15:33.483Z'
image_digest_repo='sha256:b997b0db9c2bc0a2fb803ced5fb9ff3a757e54903a28ada3e50412cc3ab7822f'
image_digest_watch=false
image_id='sha256:7d3c40f240e18f6b440bf06b1dfd8a9c48a49c1dfe3400772c3b378739cbdc47'
image_name='library/nginx'
image_os='linux'
image_registry_name='hub.public'
image_registry_url='https://registry-1.docker.io/v2'
image_tag_semver=true
image_tag_value='1.25.0'
name='test-nginx-1'
result_tag='stable-alpine3.20-slim'
status='running'
update_available=true
update_kind_kind='tag'
update_kind_local_value='1.25.0'
update_kind_remote_value='stable-alpine3.20-slim'
update_kind_semver_diff='major'
watcher='local'

In addition, a container_json environment variable is passed containing the full container entity as a JSON string.

In batch mode (execution for a batch of containers to update)

A containers_json environment variable is passed containing the array of all the containers to update as a JSON string.

Examples

Running an arbitrary command

services:
  drydock:
    image: codeswhat/drydock
    ...
    environment:
      - DD_TRIGGER_COMMAND_LOCAL_CMD=echo $${display_name} can be updated to $${update_kind_remote_value}

docker run \
  -e DD_TRIGGER_COMMAND_LOCAL_CMD=echo ${display_name} can be updated to ${update_kind_remote_value} \
  ...
  codeswhat/drydock

Running a custom bash script

services:
  drydock:
    image: codeswhat/drydock
    ...
    environment:
      - DD_TRIGGER_COMMAND_LOCAL_CMD=bash -c /drydock/trigger.sh
    volumes:
      - ${PWD}/drydock/trigger.sh:/drydock/trigger.sh

docker run \
  -e DD_TRIGGER_COMMAND_LOCAL_CMD=DD_TRIGGER_COMMAND_LOCAL_CMD=bash -c /drydock/trigger.sh \
  -v ${PWD}/drydock/trigger.sh:/drydock/trigger.sh
  ...
  codeswhat/drydock

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