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Merge pull request #5832 from brendandburns/master

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Describe manual setting of PortalIP in service creation.
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Robert Bailey 2015-03-24 07:57:19 -07:00
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docs/services.md
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@ -211,6 +211,15 @@ network interfaces. If you assign that `Node`'s external IP as a `publicIP`, yo
can then aim traffic at the `Service` port on that `Node` and it will be proxied
to the backends.
## Choosing your own PortalIP address
A user can specify their own ```PortalIP``` address as part of a service creation
request. For example, if they already have an existing DNS entry that they wish
to replace, or legacy systems that are configured for a specific IP address and difficult
to re-configure. The ```PortalIP``` address that a user chooses must be a valid IP address
and within the portal net CIDR range that is specified by flag to the API server. If
the PortalIP value is invalid, the apiserver returns a ```422``` HTTP status code to
indicate that the value is invalid.
## Shortcomings
We expect that using iptables and userspace proxies for portals will work at