HTTP Action

HTTP action makes an HTTP request.

apiVersion: mission-control.flanksource.com/v1
kind: Playbook
metadata:
  name: log-component-status
spec:
  description: Post component name and status to webhook
  components:
    - types: 
      - KubernetesCluster
  actions:
    - name: Post a message to webhook
      http:
        url: https://webhook.site/9f1392a6-718a-4ef5-a8e2-bfb55b08afca
        thresholdMillis: 5000
        method: POST
        body: |
          {
            "component": {
              "name": "{{.component.name}}",
              "status": "{{.component.status}}"
            }
          }
        templateBody: true
        headers:
          - name: X-Postgres-User
            value: admin@local
          - name: X-Flanksource-Token
            value: secret123

Field	Description	Scheme
method*	HTTP method to use. Defaults to GET	string
name*	Step Name	string
url*	Url to make the request to	string
body	Request Body Contents	string
connection	Connection name. e.g. connection://http/google	Connection
headers	Header fields to be used in the request	[]EnvVar
password	Password to authenticate with	EnvVar
templatedBody	When set to true the request body is templated	boolean
username	Username to authenticate with	EnvVar
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

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