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[enterprise-4.18] TELCODOCS-2819 adding chrony links #110708

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slovern merged 1 commit into from
Apr 23, 2026
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[enterprise-4.18] TELCODOCS-2819 adding chrony links #110708

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26 changes: 19 additions & 7 deletions modules/installation-special-config-chrony.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ endif::[]
[id="installation-special-config-chrony_{context}"]
= Configuring chrony time service

[role="_abstract"]
You
ifdef::restricted[must]
ifndef::restricted[can]
Expand All @@ -40,25 +41,29 @@ include::snippets/butane-version.adoc[]
variant: openshift
version: {product-version}.0
metadata:
name: 99-worker-chrony <1>
name: 99-worker-chrony
labels:
machineconfiguration.openshift.io/role: worker <1>
machineconfiguration.openshift.io/role: worker
storage:
files:
- path: /etc/chrony.conf
mode: 0644 <2>
mode: 0644
overwrite: true
contents:
inline: |
pool 0.rhel.pool.ntp.org iburst <3>
pool 0.rhel.pool.ntp.org iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
logdir /var/log/chrony
----
<1> On control plane nodes, substitute `master` for `worker` in both of these locations.
<2> Specify an octal value mode for the `mode` field in the machine config file. After creating the file and applying the changes, the `mode` is converted to a decimal value. You can check the YAML file with the command `oc get mc <mc-name> -o yaml`.
<3> Specify any valid, reachable time source, such as the one provided by your DHCP server.
+
--
* `name: 99-worker-chrony` - Specify a name for the machine config file. On control plane nodes, substitute `master` for `worker`.
* `machineconfiguration.openshift.io/role: worker` - On control plane nodes, substitute `master` for `worker`.
* `mode: 0644` - Specify an octal value mode for the `mode` field in the machine config file. After creating the file and applying the changes, the `mode` is converted to a decimal value. You can check the YAML file with the command `oc get mc <mc-name> -o yaml`.
* `pool 0.rhel.pool.ntp.org iburst` - Specify any valid, reachable time source, such as the one provided by your DHCP server.
--

+
[NOTE]
Expand All @@ -85,6 +90,13 @@ $ butane 99-worker-chrony.bu -o 99-worker-chrony.yaml
$ oc apply -f ./99-worker-chrony.yaml
----

For more information on chrony best practices, see the following resources:

* https://access.redhat.com/solutions/3073261[Configuring chrony]
* https://access.redhat.com/solutions/778603[Best practices for NTP]
* https://docs.redhat.com/en/documentation/red_hat_ceph_storage/8/html-single/troubleshooting_guide/basic-chrony-NTP-troubleshooting_diag#basic-chrony-NTP-troubleshooting_diag[Basic chrony NTP troubleshooting]


ifeval::["{context}" == "installing-restricted-networks-bare-metal"]
:!restricted:
endif::[]
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