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[fix] handle cases where the internal-ip is already set (e.g. kubelet) #236

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merged 2 commits into from
Oct 2, 2024
Merged

[fix] handle cases where the internal-ip is already set (e.g. kubelet) #236

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b31756e
handle cases where the internal-ip is already set (e.g. kubelet)
AshleyDumaine Oct 1, 2024
ff4c10f
add test for existing internal IP on node
AshleyDumaine Oct 2, 2024
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7 changes: 7 additions & 0 deletions cloud/linode/instances.go
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Original file line number Diff line number Diff line change
Expand Up @@ -285,6 +285,13 @@ func (i *instances) InstanceMetadata(ctx context.Context, node *v1.Node) (*cloud
addresses = append(addresses, v1.NodeAddress{Type: ip.ipType, Address: ip.ip})
}

// include IPs set by kubelet for internal node IP
for _, addr := range node.Status.Addresses {
if addr.Type == v1.NodeInternalIP {
addresses = append(addresses, v1.NodeAddress{Type: v1.NodeInternalIP, Address: addr.Address})
}
}
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Should we make sure same ip is not already present in the slice? For example, if this InstanceMetadata() gets called again after 5-10 mins, then we'll end up adding all the existing ip's again into the slice. Not sure if k8s automatically handles such case.

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It doesn't matter if it is, it just needs to be present: https://github.com/kubernetes/cloud-provider/blob/master/node/helpers/address.go#L114-L135


klog.Infof("Instance %s, assembled IP addresses: %v", node.Name, addresses)
// note that Zone is omitted as it's not a thing in Linode
meta := &cloudprovider.InstanceMetadata{
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42 changes: 35 additions & 7 deletions cloud/linode/instances_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -143,19 +143,29 @@ func TestMetadataRetrieval(t *testing.T) {
})

ipTests := []struct {
name string
inputIPv4s []string
inputIPv6 string
externalNetwork string
outputAddresses []v1.NodeAddress
expectedErr error
name string
inputIPv4s []string
inputIPv6 string
externalNetwork string
existingAddresses []v1.NodeAddress
outputAddresses []v1.NodeAddress
expectedErr error
}{
{"no IPs", nil, "", "", nil, instanceNoIPAddressesError{192910}},
{
"no IPs",
nil,
"",
"",
nil,
nil,
instanceNoIPAddressesError{192910},
},
{
"one public, one private",
[]string{"32.74.121.25", "192.168.121.42"},
"",
"",
nil,
[]v1.NodeAddress{{Type: v1.NodeExternalIP, Address: "32.74.121.25"}, {Type: v1.NodeInternalIP, Address: "192.168.121.42"}},
nil,
},
Expand All @@ -164,6 +174,7 @@ func TestMetadataRetrieval(t *testing.T) {
[]string{"32.74.121.25"},
"2600:3c06::f03c:94ff:fe1e:e072",
"",
nil,
[]v1.NodeAddress{{Type: v1.NodeExternalIP, Address: "32.74.121.25"}, {Type: v1.NodeExternalIP, Address: "2600:3c06::f03c:94ff:fe1e:e072"}},
nil,
},
Expand All @@ -172,6 +183,7 @@ func TestMetadataRetrieval(t *testing.T) {
[]string{"32.74.121.25"},
"",
"",
nil,
[]v1.NodeAddress{{Type: v1.NodeExternalIP, Address: "32.74.121.25"}},
nil,
},
Expand All @@ -180,6 +192,7 @@ func TestMetadataRetrieval(t *testing.T) {
[]string{"192.168.121.42"},
"",
"",
nil,
[]v1.NodeAddress{{Type: v1.NodeInternalIP, Address: "192.168.121.42"}},
nil,
},
Expand All @@ -188,6 +201,7 @@ func TestMetadataRetrieval(t *testing.T) {
[]string{"32.74.121.25", "32.74.121.22"},
"",
"",
nil,
[]v1.NodeAddress{{Type: v1.NodeExternalIP, Address: "32.74.121.25"}, {Type: v1.NodeExternalIP, Address: "32.74.121.22"}},
nil,
},
Expand All @@ -196,6 +210,7 @@ func TestMetadataRetrieval(t *testing.T) {
[]string{"192.168.121.42", "10.0.2.15"},
"",
"",
nil,
[]v1.NodeAddress{{Type: v1.NodeInternalIP, Address: "192.168.121.42"}, {Type: v1.NodeInternalIP, Address: "10.0.2.15"}},
nil,
},
Expand All @@ -204,9 +219,19 @@ func TestMetadataRetrieval(t *testing.T) {
[]string{"192.168.121.42", "10.0.2.15"},
"",
"10.0.2.0/16",
nil,
[]v1.NodeAddress{{Type: v1.NodeInternalIP, Address: "192.168.121.42"}, {Type: v1.NodeExternalIP, Address: "10.0.2.15"}},
nil,
},
{
"one private addresses, one existing internal IP set on the node",
[]string{"192.168.121.42"},
"",
"",
[]v1.NodeAddress{{Type: v1.NodeInternalIP, Address: "10.0.0.1"}},
[]v1.NodeAddress{{Type: v1.NodeInternalIP, Address: "192.168.121.42"}, {Type: v1.NodeInternalIP, Address: "10.0.0.1"}},
nil,
},
}

for _, test := range ipTests {
Expand All @@ -221,6 +246,9 @@ func TestMetadataRetrieval(t *testing.T) {
} else {
_, Options.LinodeExternalNetwork, _ = net.ParseCIDR(test.externalNetwork)
}
if test.existingAddresses != nil {
node.Status.Addresses = append(node.Status.Addresses, test.existingAddresses...)
}
ips := make([]*net.IP, 0, len(test.inputIPv4s))
for _, ip := range test.inputIPv4s {
parsed := net.ParseIP(ip)
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