Github Action

Github Acion allows you to invoke GitHub workflows from the playbooks.

note

You must configure your GitHub Actions workflow to run when the workflow_dispatch webhook event occurs

invoke-release-workflow.yaml
---
# Example workflow here: https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#providing-inputs
apiVersion: mission-control.flanksource.com/v1
kind: Playbook
metadata:
  name: invoke-release-action
  namespace: default
spec:
  parameters:
    - name: repo
      label: The repository name
      default: duty
    - name: branch
      label: Branch to run the workflow on
      default: main
    - name: environment
      label: Environment to run the release on
      default: production
    - name: logLevel
      label: Log level
      type: list
      properties:
        options:
          - label: info
            value: info
          - label: warning
            value: warning
          - label: error
            value: error
      default: warning
    - name: tags
      label: Should tag or not
      type: checkbox
      default: 'false'
  actions:
    - name: Invoke github workflow
      github:
        username: flanksource
        repo: '{{.params.repo}}'
        token:
          valueFrom:
            secretKeyRef:
              name: github
              key: token
        workflows:
          - id: release.yaml
            ref: '{{.params.branch}}'
            input: |
              {
                "environment": "{{.params.environment}}",
                "logLevel": "{{.params.logLevel}}",
                "tags": "{{.params.tags}}"
              }

Field	Description	Scheme
name*	Step Name	string
repo*	The name of the repository without the .git extension	string
token*	Github personal access token	EnvVar
username*	The account owner of the repository (case insensitive)	string
workflows*	List of workflows to invoke	[]Workflow
delay	A delay before running the action e.g. 8h	Duration or CEL with Playbook Context
filter	Conditionally run an action	CEL with Playbook Context
runsOn	Which runner (agent) to run the action on	[]Agent
templatesOn	Where templating (and secret management) of actions should occur	host or agent
timeout	Timeout on this action.	Duration

Github Workflow

Field	Description	Type	Required	Templatable
id	Workflow id or the workflow file name (eg release.yaml)	string	true
ref	Branch name of the tag name	string		true
input	Azure connection	json		true

Templating

CEL Expressions

The following variables can be used within the CEL expressions of filter, if, delays and parameters.default:

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
env	Environment variables defined on the playbook	map[string]string
user.name	Name of the user who invoked the action	string
user.email	Email of the user who invoked the action	string

Conditionally Running Actions

Playbook actions can be selectively executed based on CEL expressions. These expressions must either return

• a boolean value (true indicating run the action & skip the action otherwise)
• or a special function among the ones listed below

Function	Description
always()	run no matter what; even if the playbook is cancelled/fails
failure()	run if any of the previous actions failed
skip()	skip running this action
success()	run only if all previous actions succeeded (default)
timeout()	run only if any of the previous actions timed out

delete-kubernetes-pod.yaml
---
apiVersion: mission-control.flanksource.com/v1
kind: Playbook
metadata:
  name: notify-send-with-filter
spec:
  parameters:
    - name: message
      label: The message for notification
      default: '{{.config.name}}'
  configs:
    - types: 
        - Kubernetes::Pod
  actions:
    - name: Send notification
      exec:
        script: notify-send "{{.config.name}} was created"
    - name: Bad script
      exec:
        script: deltaforce
    - name: Send all success notification
      if: success() # this filter practically skips this action as the second action above always fails
      exec:
        script: notify-send "Everything went successfully"
    - name: Send notification regardless
      if: always()
      exec:
        script: notify-send "a Pod config was created"

Defaulting Parameters

delete-kubernetes-pod.yaml
apiVersion: mission-control.flanksource.com/v1
kind: Playbook
metadata:
  name: edit
spec:
  title: 'Edit Kustomize Resource'
  icon: flux
  parameters:
    //highligh-next-line
    - default: 'chore: update $(.config.type)/$(.config.name)'
      name: commit_message

Go Templating

When templating actions with Go Templates, the context variables are available as fields of the template's context object . eg .config, .user.email

Templating Actions

delete-kubernetes-pod.yaml
apiVersion: mission-control.flanksource.com/v1
kind: Playbook
metadata:
  name: scale-deployment
spec:
  description: Scale Deployment
  configs:
    - types:
        - Kubernetes::Deployment
  parameters:
    - name: replicas
      label: The new desired number of replicas.
  actions:
    - name: kubectl scale
      exec:
        script: |
          kubectl scale --replicas={{.params.replicas}} \
            --namespace={{.config.tags.namespace}} \
            deployment {{.config.name}}

Functions

Function	Description	Return
getLastAction()	Returns the result of the action that just run	Action Specific
getAction({action})	Return the result of a specific action	Action Specific

Reusing Action Results

action-results.yaml
apiVersion: mission-control.flanksource.com/v1
kind: Playbook
metadata:
  name: use-previous-action-result
spec:
  description: Creates a file with the content of the config
  configs:
    - types:
        - Kubernetes::Pod
  actions:
    - name: Fetch all changes
      sql:
        query: SELECT id FROM config_changes WHERE config_id = '{{.config.id}}'
        driver: postgres
        connection: connection://postgres/local
    - name: Send notification
      if: 'last_result().count > 0'
      notification:
        title: 'Changes summary for {{.config.name}}'
        connection: connection://slack/flanksource
        message: |
          {{$rows:=index last_result "count"}}
          Found {{$rows}} changes