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DockerManager: Support IPv6 addresses

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Falls back to the GlobalIPv6Address or ip -6 addr output in case no
IPv4 is configured for the container.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
This commit is contained in:
Thomas Graf 2016-03-17 01:27:16 +01:00
parent 44eaf33056
commit 90623d9b51
1 changed files with 14 additions and 0 deletions
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14
pkg/kubelet/dockertools/manager.go
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@ -301,6 +301,11 @@ 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 {
@ -1214,6 +1219,15 @@ 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
}