Expressions
Expressions is a powerful tool that allows formulating complex filters for playbook events. Playbook event filters use Common Expression Language (CEL).
The Common Expression Language (CEL) is a non-Turing complete language designed for simplicity, speed, safety, and portability. CEL's C-like syntax looks nearly identical to equivalent expressions in C++, Go, Java, and TypeScript.
Examples:
filter: check.type == 'http'
filter: check.type == 'http' && summary.failed > 3
Context
| Field | Description | Schema |
|---|---|---|
config | Config passed to the playbook | ConfigItem |
component | Component passed to the playbook | Component |
check | Canary Check passed to the playbook | Check |
params | User provided parameters to the playbook | map[string]string |