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Merge pull request #80747 from danwinship/aws-nodeaddress-sorting

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aws: sort addresses of multiple interfaces correctly
This commit is contained in:
Kubernetes Prow Robot 2019-09-26 10:49:06 -07:00 committed by GitHub
commit 9f036cd43d
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3 changed files with 53 additions and 6 deletions
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27
staging/src/k8s.io/legacy-cloud-providers/aws/aws.go
View File

@ -1404,14 +1404,35 @@ func (c *Cloud) NodeAddresses(ctx context.Context, name types.NodeName) ([]v1.No
return nil, fmt.Errorf("error querying AWS metadata for %q: %q", "network/interfaces/macs", err)
}
// We want the IPs to end up in order by interface (in particular, we want eth0's
// IPs first), but macs isn't necessarily sorted in that order so we have to
// explicitly order by device-number (device-number == the "0" in "eth0").
macIPs := make(map[int]string)
for _, macID := range strings.Split(macs, "\n") {
if macID == "" {
continue
}
macPath := path.Join("network/interfaces/macs/", macID, "local-ipv4s")
internalIPs, err := c.metadata.GetMetadata(macPath)
numPath := path.Join("network/interfaces/macs/", macID, "device-number")
numStr, err := c.metadata.GetMetadata(numPath)
if err != nil {
return nil, fmt.Errorf("error querying AWS metadata for %q: %q", macPath, err)
return nil, fmt.Errorf("error querying AWS metadata for %q: %q", numPath, err)
}
num, err := strconv.Atoi(strings.TrimSpace(numStr))
if err != nil {
klog.Warningf("Bad device-number %q for interface %s\n", numStr, macID)
continue
}
ipPath := path.Join("network/interfaces/macs/", macID, "local-ipv4s")
macIPs[num], err = c.metadata.GetMetadata(ipPath)
if err != nil {
return nil, fmt.Errorf("error querying AWS metadata for %q: %q", ipPath, err)
}
}
for i := 0; i < len(macIPs); i++ {
internalIPs := macIPs[i]
if internalIPs == "" {
continue
}
for _, internalIP := range strings.Split(internalIPs, "\n") {
if internalIP == "" {

17
staging/src/k8s.io/legacy-cloud-providers/aws/aws_fakes.go
View File

@ -19,6 +19,8 @@ limitations under the License.
package aws
import (
"fmt"
"sort"
"strings"
"github.com/aws/aws-sdk-go/aws"
@ -335,7 +337,13 @@ func (m *FakeMetadata) GetMetadata(key string) (string, error) {
return aws.StringValue(i.PublicIpAddress), nil
} else if strings.HasPrefix(key, networkInterfacesPrefix) {
if key == networkInterfacesPrefix {
return strings.Join(m.aws.networkInterfacesMacs, "/\n") + "/\n", nil
// Return the MACs sorted lexically rather than in device-number
// order; this matches AWS's observed behavior and lets us test
// that we fix up the ordering correctly in NodeAddresses().
macs := make([]string, len(m.aws.networkInterfacesMacs))
copy(macs, m.aws.networkInterfacesMacs)
sort.Strings(macs)
return strings.Join(macs, "/\n") + "/\n", nil
}
keySplit := strings.Split(key, "/")
@ -347,6 +355,13 @@ func (m *FakeMetadata) GetMetadata(key string) (string, error) {
}
}
}
if len(keySplit) == 5 && keySplit[4] == "device-number" {
for i, macElem := range m.aws.networkInterfacesMacs {
if macParam == macElem {
return fmt.Sprintf("%d\n", i), nil
}
}
}
if len(keySplit) == 5 && keySplit[4] == "local-ipv4s" {
for i, macElem := range m.aws.networkInterfacesMacs {
if macParam == macElem {

15
staging/src/k8s.io/legacy-cloud-providers/aws/aws_test.go
View File

@ -580,7 +580,7 @@ func testHasNodeAddress(t *testing.T, addrs []v1.NodeAddress, addressType v1.Nod
}
func TestNodeAddresses(t *testing.T) {
// Note these instances have the same name
// Note instance0 and instance1 have the same name
// (we test that this produces an error)
var instance0 ec2.Instance
var instance1 ec2.Instance
@ -696,7 +696,7 @@ func TestNodeAddressesWithMetadata(t *testing.T) {
instances := []*ec2.Instance{&instance}
awsCloud, awsServices := mockInstancesResp(&instance, instances)
awsServices.networkInterfacesMacs = []string{"0a:26:89:f3:9c:f6", "0a:77:64:c4:6a:48"}
awsServices.networkInterfacesMacs = []string{"0a:77:89:f3:9c:f6", "0a:26:64:c4:6a:48"}
awsServices.networkInterfacesPrivateIPs = [][]string{{"192.168.0.1"}, {"192.168.0.2"}}
addrs, err := awsCloud.NodeAddresses(context.TODO(), "")
if err != nil {
@ -705,6 +705,17 @@ func TestNodeAddressesWithMetadata(t *testing.T) {
testHasNodeAddress(t, addrs, v1.NodeInternalIP, "192.168.0.1")
testHasNodeAddress(t, addrs, v1.NodeInternalIP, "192.168.0.2")
testHasNodeAddress(t, addrs, v1.NodeExternalIP, "2.3.4.5")
var index1, index2 int
for i, addr := range addrs {
if addr.Type == v1.NodeInternalIP && addr.Address == "192.168.0.1" {
index1 = i
} else if addr.Type == v1.NodeInternalIP && addr.Address == "192.168.0.2" {
index2 = i
}
}
if index1 > index2 {
t.Errorf("Addresses in incorrect order: %v", addrs)
}
}
func TestParseMetadataLocalHostname(t *testing.T) {