The documentation is under development and may contain incomplete information.

Configuring node time synchronization

To configure time synchronization on nodes, use the chrony module or replace it with a custom NTP daemon.

To enable the kube-dns module with default settings, apply the ModuleConfig resource, specifying your NTP servers for synchronization. Example of configuration with a default NTP server:

d8 k apply -f - <<EOF
apiVersion: deckhouse.io/v1alpha1
kind: ModuleConfig
metadata:
  name: chrony
spec:
  enabled: true
  settings:
    ntpServers:
      - pool.ntp.org
  version: 1
EOF

Using NTP daemons

  1. To disable chrony and use custom NTP daemons on nodes, disable the module running the following command:

    d8 k -ti -n d8-system exec svc/deckhouse-leader -c deckhouse -- deckhouse-controller module disable chrony

    If the command succeeds, you should see a message confirming that the module has been disabled:

    Module chrony disabled

  2. To enable NTP daemons on nodes, create NodeGroupConfiguration. Below is an example configuration using systemd-timesyncd:

    d8 k apply -f - <<EOF
apiVersion: deckhouse.io/v1alpha1
kind: NodeGroupConfiguration
metadata:
  name: enable-ntp-on-node.sh
spec:
  weight: 100
  nodeGroups: ["*"]
  bundles: ["*"]
  content: |
    systemctl enable systemd-timesyncd
    systemctl start systemd-timesyncd
EOF