3143d86b69
Updates for patchset 2 review comments Changed link depth of main Planning index and added some narrative guidance Added planning/openstack as sibling of planning/kubernetes Related additions to abbrevs.txt Added max-workers substitution to accomodate StarlingX/vendor variants Signed-off-by: Ron Stone <ronald.stone@windriver.com> Change-Id: Ibff9af74ab3f2c00958eff0e33c91465f1dab6b4 Signed-off-by: Stone <ronald.stone@windriver.com>
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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
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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
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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
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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
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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.