Chrony¶

Field	Value
Purpose	Chrony-specific configuration — modern NTP replacement, default on RHEL/Fedora/CentOS
Repo	AmadlaOrg/Entities/Application/Timekeeping/Chrony
Entity URI	`amadla.org/entity/application/timekeeping/chrony@v1.0.0`
Parent type	Application/Timekeeping

Schema¶

Property	Type	Description
`makestep.threshold`	number	Seconds threshold for a step adjustment (e.g., `1.0`)
`makestep.limit`	integer	Max step adjustments after start (`3` is common, `-1` for unlimited)
`rtcsync`	boolean	Sync system clock to hardware clock (default: `true`)
`driftfile`	string	Path to drift file (default: `/var/lib/chrony/drift`)
`keyfile`	string	Path to key file for NTP authentication
`logdir`	string	Log directory (default: `/var/log/chrony`)
`allow`	array of strings	Networks allowed to use this machine as NTP server
`deny`	array of strings	Networks denied from using this machine as NTP server
`local_stratum`	integer	Serve time locally even when not synchronized (stratum value)
`leapsectz`	string	Timezone database for leap second handling (e.g., `right/UTC`)

Example¶

_type: amadla.org/entity/application/timekeeping/chrony@v1.0.0
_extends: amadla.org/entity/application/timekeeping@v1.0.0
_body:
  pools:
    - 0.pool.ntp.org
    - 1.pool.ntp.org
  servers:
    - time.google.com
  preferred: time.google.com
  makestep:
    threshold: 1.0
    limit: 3
  rtcsync: true
  driftfile: /var/lib/chrony/drift
  logdir: /var/log/chrony
  allow:
    - 192.168.0.0/16
  leapsectz: right/UTC

Why Chrony Over NTP¶

Faster initial synchronization
Better performance on intermittent connections (laptops, VMs)
Lower memory and CPU usage
Handles large clock offsets gracefully (makestep)
Default on RHEL 7+, Fedora, CentOS, Amazon Linux 2

Consumers¶

Tool	How It Uses Application/Timekeeping/Chrony
lay	Installs the `chrony` package
weaver	Generates `/etc/chrony.conf`
enjoin-service	Enables/starts `chronyd` service