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Support IPv6 addresses for getListener()

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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.
This commit is contained in:
Paul Michali 2017-06-29 14:05:56 +00:00
parent 74f1943774
commit e17a501bcb
2 changed files with 4 additions and 10 deletions
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2
staging/src/k8s.io/client-go/tools/portforward/portforward.go
View File

@ -207,7 +207,7 @@ func (pf *PortForwarder) listenOnPortAndAddress(port *ForwardedPort, protocol st
// getListener creates a listener on the interface targeted by the given hostname on the given port with
// the given protocol. protocol is in net.Listen style which basically admits values like tcp, tcp4, tcp6
func (pf *PortForwarder) getListener(protocol string, hostname string, port *ForwardedPort) (net.Listener, error) {
listener, err := net.Listen(protocol, fmt.Sprintf("%s:%d", hostname, port.Local))
listener, err := net.Listen(protocol, net.JoinHostPort(hostname, strconv.Itoa(int(port.Local))))
if err != nil {
return nil, fmt.Errorf("Unable to create listener: Error %s", err)
}

12
staging/src/k8s.io/client-go/tools/portforward/portforward_test.go
View File

@ -134,13 +134,13 @@ func TestGetListener(t *testing.T) {
ExpectedListenerAddress: "127.0.0.1",
},
{
Hostname: "[::1]",
Hostname: "::1",
Protocol: "tcp6",
ShouldRaiseError: false,
ExpectedListenerAddress: "::1",
},
{
Hostname: "[::1]",
Hostname: "::1",
Protocol: "tcp4",
ShouldRaiseError: true,
},
@ -149,12 +149,6 @@ func TestGetListener(t *testing.T) {
Protocol: "tcp6",
ShouldRaiseError: true,
},
{
// IPv6 address must be put into brackets. This test reveals this.
Hostname: "::1",
Protocol: "tcp6",
ShouldRaiseError: true,
},
}
for i, testCase := range testCases {
@ -182,7 +176,7 @@ func TestGetListener(t *testing.T) {
host, port, _ := net.SplitHostPort(listener.Addr().String())
t.Logf("Asked a %s forward for: %s:%v, got listener %s:%s, expected: %s", testCase.Protocol, testCase.Hostname, 12345, host, port, expectedListenerPort)
if host != testCase.ExpectedListenerAddress {
t.Errorf("Test case #%d failed: Listener does not listen on exepected address: asked %v got %v", i, testCase.ExpectedListenerAddress, host)
t.Errorf("Test case #%d failed: Listener does not listen on expected address: asked '%v' got '%v'", i, testCase.ExpectedListenerAddress, host)
}
if port != expectedListenerPort {
t.Errorf("Test case #%d failed: Listener does not listen on exepected port: asked %v got %v", i, expectedListenerPort, port)