docs/doc/source/planning/kubernetes/about-the-oam-network.rst
Ron Stone f125a8b892 Remove spurious escapes (r8,dsR8)
This change addresses a long-standing issue in rST documentation imported from XML.
That import process added backslash escapes in front of various characters. The three
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These instances are removed.

Signed-off-by: Ron Stone <ronald.stone@windriver.com>
Change-Id: Id43a9337ffcd505ccbdf072d7b29afdb5d2c997e
2023-03-01 11:19:04 +00:00

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About the OAM Network

The network provides for control access.

You should ensure that the following services are available on the Network:

DNS Service

Needed to facilitate the name resolution of servers reachable on the Network.

can operate without a configured DNS service. However, a DNS service should be in place to ensure that links to external references in the current and future versions of the Horizon Web interface work as expected.

Docker Registry Service

A private or public Docker registry service needed to serve remote container image requests from Kubernetes and the underlying Docker service.

This remote Docker registry must hold the required container images for the appropriate release, to fully install a system.

NTP Service

can be used by the controller nodes to synchronize their local clocks with a reliable external time reference. strongly recommends that this service be available to ensure that system-wide log reports present a unified view of the day-to-day operations.

The worker nodes and storage nodes always use the controller nodes as the de-facto time server for the entire cluster.

PTP Service

As an alternative to services, can be used by the controller nodes to synchronize clocks in a network. It provides:

  • more accurate clock synchronization
  • the ability to extend the clock synchronization, not only to hosts (controllers, workers, and storage nodes), but also to hosted applications on hosts.

When used in conjunction with hardware support on the and Management network interface cards, is capable of sub-microsecond accuracy. strongly recommends that this service, or , if available, be used to ensure that system-wide log reports present a unified view of the day-to-day operations, and that other time-sensitive operations are performed accurately.

Various and network switches provide the hardware support for used by and Management networks. This hardware provides an on-board clock that is synchronized to the master. The computer's system clock is synchronized to the hardware clock on the used to stamp transmitted and received messages. For more information, see the IEEE 1588-2002 standard.

Note

and can be configured on a per host basis.