When setting up a port forwarding with the client-go library (using the
`k8s.io/client-go/tools/portforward.PortForwarder`) with a non-defined local
port (i.e. passing `:80` as `ports` parameter to `portforward.New(...)`), a
local port will be assigned dynamically.
Currently, the local port will be _always_ 0 if it was not specified initially.
This is because the assigned local port is only set on a _copy_ of the actual
`ForwardedPort` type that is obtained in a `range` loop. This PR changes this
behaviour to set the local port at the correct instance by passing a pointer
instead of a copy to the relevant functions.
Kubernetes-commit: bbddd27f0dfffe6623763afe2c02c876ba925a7c
The rules for address parsing are:
* Explicitly specified addresses must bind successfully
* `localhost` is pinned to `127.0.0.1` and `::1` and at least one of those must bind successfully
This change also makes output of the command consistent
between runs with the same arguments.
Previously the command was using the range via map of addresses
which sometimes was producing different output because the order
of values is not guaranteed in Go.
Kubernetes-commit: 4ee2010111af602988bf9bedf66d1a0c36419b09
adds an address flag to kubectl port-forward to allow to bind to a different ip then localhost
Kubernetes-commit: 4643c6e95e0a0cf6561554fb3b9a1bc59bcead0c
Without this change, the only method to discover what local port was
bound (if port 0 was requested) is to parse it out of the "out" stream,
which isn't the most reliable method.
Kubernetes-commit: a9084923f2bd499c287b675007cb7c6c093d60ad
The IPV6 loopback address `::1` is enclosed in square brackets twice,
which cause a failure to listen on the TCP6 port.
Kubernetes-commit: 942ff28e4d9da16ac4b69ac33129b9db80f67145
Currently, client-go requires that an IPv6 address string for hostname has
square brackets surrounding, so that it can be used with address:port in
an API request.
This change, removes that requirement, and has getListener() add the
square brackets for IPv6 addresses for hosts. If IPv4 or hostname, the name
will not be modified.
Decided to change here, rather than everywhere client-go is used (thinking
that there may be places where we DON'T want the square brackets applied).
This issue was found in kubelet, which, at startup, creates a listener for
services and nodes. If an IPv6 address is used, the URI was malformed.
Kubernetes-commit: e17a501bcb7a3d2c5f4ff5c41f122fe155395dcd
