In a nutshell

s3mon will list and search for files starting with a prefix on a list of defined buckets that are not older than a specified age. These options are defined in a config.yml file, (YAML formated)

The config file

Example of a configuration file:

---
s3mon:
  endpoint: s3.provider
  region: <aws-region>
  access_key: ACCESS_KEY_ID
  secret_key: SECRET_ACCESS_KEY
  buckets:
    bucket_A: # bucket name
      - prefix: starts_with_foo # prefix file starts with
        age: 86400 # in seconds
        size: 30720 # in bytes
    bucket_B:
      - prefix: file
        age: 43200
      - prefix: my-55GB-backup-every-2-days
        age: 172800
        size: 53687091200

The size option is in bytes and it is optional. If defined, it will be compared against the file size of the file found, for example, if your backups are in average 55GB you could set it to 53687091200, if the found file size is lower than the defined size it will return a size_mistmach=1 so that you could also configure alerts based on this.

If your S3 provider is AWS you can omit the endpoint and only specify a region, for example:

---
s3mon:
  region: us-east-1
  access_key: ACCESS_KEY_ID
  secret_key: SECRET_ACCESS_KEY
  buckets:
    bucket_name:
      - prefix: starts_with_foo
        age: 86400
        size: 30720

The access_key and secret_key can be omitted if the environment vars AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY are set, example:

---
s3mon:
  region: us-east-1
  buckets:
    bucket_name:
      - prefix: starts_with_foo
        age: 86400
        size: 30720