Event Triggers

Playbook events are triggers that cause a Playbook to run. Events are triggered when specific activity on Mission Control occurs. For example: you can trigger a Playbook to run when a component goes unhealthy.

Multiple playbooks could be listening to the same event and likewise a playbook can be listening to multiple events. If a playbook is listening on multiple events then it is triggered when any of those events occur.

Event Spec

Filters can give you fine-grained control over the events that can trigger the playbook.

Field	Description	Scheme	Required
event	Event to listen for.	string	true
filter	CEL expression for additional event filtering. (See Expressions)	string	true
labels	Labels specifies the key-value pairs that the associated event's resource must match.	map[string]string	false

Types

At this point, there's only support for events on canaries and components.

Canary events

Canary events relate to activities on health checks.

Event	Description
passed	When a previously failed check passes
failed	When a previously passed check fails

Example

apiVersion: mission-control.flanksource.com/v1
kind: Playbook
metadata:
  name: notify-passing-http-checks
spec:
  description: Notify when any HTTP check passes
  on:
    canary:
      - event: passed
        filter: check.type == 'http'
  actions: ...

Component events

Component events relate to activities on Topology components.

Event	Description
healthy	when a component becomes healthy
unhealthy	when a component becomes unhealthy
info	when a component has info
warning	when a component has warning
error	when a component has error

Example

apiVersion: mission-control.flanksource.com/v1
kind: Playbook
metadata:
  name: notify-unhealthy-database-component
spec:
  description: Notify when a database component goes unhealthy
  on:
    component:
      - event: unhealthy
        filter: component.type == 'database'
        labels:
          industry: e-commerce
  actions: ...