Vero Monitor Service

This probe is currently at the experimental stage.

Description

The file_check probe checks a file on the filesystem: existence, size, and age (modification time).

Field	Type	Required	Default	Description
`type`	`string`	Yes	—	Must be `"file_check"`
`filePath`	`string`	Yes	—	File path to check
`mustExist`	`bool`	No	`true`	`true`: file must exist → absent = `down`. `false`: absent file is `up`
`minSizeBytes`	`int64`	No	—	Minimum file size (bytes)
`maxSizeBytes`	`int64`	No	—	Maximum file size (bytes)
`maxAgeSeconds`	`int64`	No	—	Maximum file age (seconds since last modification)

Metric	Type	Description
`vms.file_check.status`	status	`up` or `down`

{
  "type": "file_check",
  "filePath": "/var/log/app/app.log",
  "mustExist": true,
  "maxAgeSeconds": 600
}