voff

Voff is a tool that kicks a watchdog device as long as no probe fail.

Usage

Create configuration file:

watchdog:
  device: /dev/watchdog
  intervalSeconds: 1
probes:
  - exec:
      command:
        - true
  - exec:
      command:
        - false
    failureThreshold: 10
    periodSeconds: 1

Run voff:

$ voff -config /etc/voff.yaml

Configuration

Voff is configured with a YAML file with two top-level keys:

watchdog

• device: watchdog device path.
• intervalSeconds: interval seconds to kick the watchdog.

probes

A list of one or many probes, inspired by Kubernetes container probes, where each probe can have the following keys:

• exec
  • command: list of command arguments to run, at least one required.
• failureThreshold: number of failed probes that should result in a failure. Default 1.
• initialDelaySeconds: number of seconds to wait before running the first probe. Default 0.
• periodSeconds: number of seconds to wait between each probe.
• timeoutSeconds: number of seconds to wait for the probe to complete.