Checks and scripts

The basic idea is that monitoring is performed through Checks which execute a specific Script (Bash and Python are supported for now) as a Kubernetes job.

Check statuses are defined by the following elements:

The check output, represented as a String
The check result represented by one of the following numbers
- 0: okay
- 1: warning
- 2: critical
- 3: unknown

For example, if I would like to monitor the Below an example of a simple Check, Script and TelegramChannel.

apiVersion: pinglow.io/v1alpha1
kind: Check
metadata:
  name: my-service-reachability
  namespace: pinglow
spec:
  scriptRef: check-service
  interval: 
  secretRefs:
    - my-service-definition

As we can see, the Check references a standard secret and so its keys and values will be automatically passed as environment variables in the Kubernetes job used to run the script.

apiVersion: pinglow.io/v1alpha1
kind: Script
metadata:
  name: my-service-definition
  namespace: pinglow
spec:
  language: Bash
  content: |
    if ! curl -u "${USER}:${PASSWORD}" "https://${ENDPOINT}"" ; then
        echo "[!] Error in reaching ${ENDPOINT}"
        exit 2
    fi

    exit 0

In case the script would have been a Python script, an additional python_requirements property is available to specify requirements which need to be installed to run the script.