Slack

Description

This plugin enables you to send data to a Slack channel.

Source Code: https://github.com/go-vela/vela-slack

Registry: https://hub.docker.com/r/target/vela-slack

Usage

NOTE:

Users should refrain from using latest as the tag for the Docker image.

It is recommended to use a semantically versioned tag instead.

Sample of sending a message:

steps:
  - name: message
    image: target/vela-slack:latest
    pull: always
    parameters:
      text: "Hello World!"

Sample of sending a message with formatting:

steps:
  - name: message-with-formatting
    image: target/vela-slack:latest
    pull: not_present
    parameters:
-     text: "Hello World!"
+     text: "Hello Repo {{ .RepositoryName }}!"

Sample of sending a message with local attachment file:

steps:
  - name: message-with-attachment
    image: target/vela-slack:latest
    secrets: [ slack_webhook ]
    parameters:
-     text: "Hello World!"
      filepath: slack_attachment.json
      remote: false

Sample of sending a message with remote attachment file:

steps:
  - name: message-with-remote-attachment
    image: target/vela-slack:latest
    secrets: [ slack_webhook ]
    parameters:
-     text: "Hello World!"
      filepath: slack_attachment.json
      remote: true
      registry: https://github.com

content of slack_attachment.json:

{
    "attachments": [
        {
            "fallback": "Required plain-text summary of the attachment.",
            "color": "#36a64f",
            "pretext": "Optional text that appears above the attachment block",
            "author_name": "Bobby Tables",
            "author_link": "http://flickr.com/bobby/",
            "author_icon": "http://flickr.com/icons/bobby.jpg",
            "title": "Slack API Documentation",
            "title_link": "https://api.slack.com/",
            "text": "Build: {{ .BuildNumber }}",
            "fields": [
                {
                    "title": "Priority",
                    "value": "High",
                    "short": false
                }
            ],
            "image_url": "http://my-website.com/path/to/image.jpg",
            "thumb_url": "http://example.com/path/to/thumb.png",
            "footer": "Slack API",
            "footer_icon": "https://platform.slack-edge.com/img/default_application_icon.png",
            "ts": 123456789
        }
    ]
}

NOTE:

To use any variables within attachments the file must be saved in the attachment format and be a JSON file.

The configuration below is pulled almost directly from the Slack Message Builder attachments example.

Secrets

NOTE: Users should refrain from configuring sensitive information in your pipeline in plain text.

Internal

The plugin accepts the following parameters for authentication:

Parameter	Environment Variable Configuration
webhook	PARAMETER_WEBHOOK, SLACK_WEBHOOK

Users can use Vela internal secrets to substitute these sensitive values at runtime:

steps:
  - name: message
    image: target/vela-slack:latest
    pull: always
+   secrets: [ slack_webhook ]
    parameters:
      text: "Hello World!"
-     webhook: http://slack.example.com

This example will add the secret to the message step as environment variables:

• SLACK_WEBHOOK=<value>

External

The plugin accepts the following files for authentication:

Parameter	Volume Configuration
webhook	/vela/parameters/slack/webhook, /vela/secrets/slack/webhook

Users can use Vela external secrets to substitute these sensitive values at runtime:

steps:
  - name: message
    image: target/vela-slack:latest
    pull: always
    parameters:
      text: "Hello World!"
-     webhook: http://slack.example.com

This example will read the secret value in the volume stored at /vela/secrets/

Parameters

NOTE:

The plugin supports reading all parameters via environment variables or files.

Any values set from a file take precedence over values set from the environment.

The following parameters are used to configure the image:

Name	Description	Required	Default	Environment Variables
channel	Slack channel to send data to	false	N/A	PARAMETER_CHANNEL SLACK_CHANNEL
filepath	file path to attachment JSON file	false	N/A	PARAMETER_FILEPATH SLACK_FILEPATH
icon_emoji	Slack emoji to use for the icon	false	N/A	PARAMETER_ICON_EMOJI SLACK_ICON_EMOJI
icon_url	Slack emoji URL to use for the icon	false	N/A	PARAMETER_ICON_URL SLACK_ICON_URL
log_level	set the log level for the plugin	true	info	PARAMETER_LOG_LEVEL SLACK_LOG_LEVEL
text	top level text to display in message	false	N/A	PARAMETER_TEXT SLACK_TEXT
thread_ts	timestamp of the thread post	false	N/A	PARAMETER_THREAD_TS SLACK_THREAD_TS
webhook	Slack webhook url to send data to	true	N/A	PARAMETER_WEBHOOK SLACK_WEBHOOK

Template

COMING SOON!

Troubleshooting

You can start troubleshooting this plugin by tuning the level of logs being displayed:

steps:
  - name: message
    image: target/vela-slack:latest
    pull: always
    parameters:
+     log_level: trace
      text: "Hello World!"

Below are a list of common problems and how to solve them: