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Merge pull request #23090 from tgraf/ipv6

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Automatic merge from submit-queue

Add IPv6 address support for pods - does NOT include services

This allows a container to have an IPv6 address only and extracts the address via nsenter and iproute2 or the docker client directly. An IPv6 address is now correctly reported when describing a pod.

@thockin @kubernetes/sig-network

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This change is [<img src="http://reviewable.k8s.io/review_button.svg" height="35" align="absmiddle" alt="Reviewable"/>](http://reviewable.k8s.io/reviews/kubernetes/kubernetes/23090)
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This commit is contained in:
k8s-merge-robot 2016-05-13 06:32:00 -07:00
commit bb3f5b1768
2 changed files with 34 additions and 0 deletions
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20
pkg/api/endpoints/util_test.go
View File

@ -66,6 +66,16 @@ func TestPackSubsets(t *testing.T) {
Addresses: []api.EndpointAddress{{IP: "1.2.3.4"}},
Ports: []api.EndpointPort{{Port: 111}},
}},
}, {
name: "one set, one ip, one port (IPv6)",
given: []api.EndpointSubset{{
Addresses: []api.EndpointAddress{{IP: "beef::1:2:3:4"}},
Ports: []api.EndpointPort{{Port: 111}},
}},
expect: []api.EndpointSubset{{
Addresses: []api.EndpointAddress{{IP: "beef::1:2:3:4"}},
Ports: []api.EndpointPort{{Port: 111}},
}},
}, {
name: "one set, one notReady ip, one port",
given: []api.EndpointSubset{{
@ -169,6 +179,16 @@ func TestPackSubsets(t *testing.T) {
Addresses: []api.EndpointAddress{{IP: "1.2.3.4"}},
Ports: []api.EndpointPort{{Port: 111}},
}},
}, {
name: "one set, dup ips, one port (IPv6)",
given: []api.EndpointSubset{{
Addresses: []api.EndpointAddress{{IP: "beef::1"}, {IP: "beef::1"}},
Ports: []api.EndpointPort{{Port: 111}},
}},
expect: []api.EndpointSubset{{
Addresses: []api.EndpointAddress{{IP: "beef::1"}},
Ports: []api.EndpointPort{{Port: 111}},
}},
}, {
name: "one set, dup ips with target-refs, one port",
given: []api.EndpointSubset{{

14
pkg/kubelet/dockertools/manager.go
View File

@ -324,6 +324,11 @@ func (dm *DockerManager) determineContainerIP(podNamespace, podName string, cont
if container.NetworkSettings != nil {
result = container.NetworkSettings.IPAddress
// Fall back to IPv6 address if no IPv4 address is present
if result == "" {
result = container.NetworkSettings.GlobalIPv6Address
}
}
if dm.networkPlugin.Name() != network.DefaultPluginName {
@ -1171,6 +1176,15 @@ func (dm *DockerManager) GetContainerIP(containerID, interfaceName string) (stri
args := []string{"-t", fmt.Sprintf("%d", containerPid), "-n", "--", "bash", "-c", extractIPCmd}
command := exec.Command("nsenter", args...)
out, err := command.CombinedOutput()
// Fall back to IPv6 address if no IPv4 address is present
if err == nil && string(out) == "" {
extractIPCmd = fmt.Sprintf("ip -6 addr show %s scope global | grep inet6 | awk -F\" \" '{print $2}'", interfaceName)
args = []string{"-t", fmt.Sprintf("%d", containerPid), "-n", "--", "bash", "-c", extractIPCmd}
command = exec.Command("nsenter", args...)
out, err = command.CombinedOutput()
}
if err != nil {
return "", err
}