-
Notifications
You must be signed in to change notification settings - Fork 346
/
node.go
147 lines (134 loc) · 4.1 KB
/
node.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
// Copyright 2021 Antrea Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package k8s
import (
"fmt"
"net"
"strings"
ip2 "github.com/containernetworking/plugins/pkg/ip"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/util/sets"
"antrea.io/antrea/pkg/agent/types"
"antrea.io/antrea/pkg/util/ip"
)
// GetNodeAddrs gets the available IP addresses of a Node. GetNodeAddrs will first try to get the NodeInternalIP, then try
// to get the NodeExternalIP.
// If no error is returned, the returned DualStackIPs includes at least one IPv4 or IPv6 address.
func GetNodeAddrs(node *v1.Node) (*ip.DualStackIPs, error) {
addresses := make(map[v1.NodeAddressType][]string)
for _, addr := range node.Status.Addresses {
addresses[addr.Type] = append(addresses[addr.Type], addr.Address)
}
var ipAddrStrs []string
if internalIP, ok := addresses[v1.NodeInternalIP]; ok {
ipAddrStrs = internalIP
} else if externalIP, ok := addresses[v1.NodeExternalIP]; ok {
ipAddrStrs = externalIP
} else {
return nil, fmt.Errorf("Node %s has neither external ip nor internal ip", node.Name)
}
if len(ipAddrStrs) == 0 {
return nil, fmt.Errorf("no IP is found for Node '%s'", node.Name)
}
nodeAddrs := new(ip.DualStackIPs)
for i := range ipAddrStrs {
addr := net.ParseIP(ipAddrStrs[i])
if addr == nil {
return nil, fmt.Errorf("'%s' is not a valid IP address", ipAddrStrs[i])
}
if addr.To4() == nil {
nodeAddrs.IPv6 = addr
} else {
nodeAddrs.IPv4 = addr
}
}
return nodeAddrs, nil
}
// GetNodeAddrsFromAnnotations gets available IPs from the Node Annotation. The annotations are set by Antrea.
func GetNodeAddrsFromAnnotations(node *v1.Node, annotationKey string) (*ip.DualStackIPs, error) {
annotationAddrsStr := node.Annotations[annotationKey]
if annotationAddrsStr == "" {
return nil, nil
}
var ipAddrs = new(ip.DualStackIPs)
for _, addr := range strings.Split(annotationAddrsStr, ",") {
peerNodeAddr := net.ParseIP(addr)
if peerNodeAddr == nil {
return nil, fmt.Errorf("invalid annotation for ip-address on Node %s: %s", node.Name, annotationAddrsStr)
}
if peerNodeAddr.To4() == nil {
ipAddrs.IPv6 = peerNodeAddr
} else {
ipAddrs.IPv4 = peerNodeAddr
}
}
return ipAddrs, nil
}
// GetNodeGatewayAddrs gets Node Antrea gateway IPs from the Node Spec.
func GetNodeGatewayAddrs(node *v1.Node) (*ip.DualStackIPs, error) {
nodeAddrs := new(ip.DualStackIPs)
parseIP := func(podCIDR string) error {
cidrIP, _, err := net.ParseCIDR(podCIDR)
if err != nil {
return err
}
if cidrIP.To4() != nil {
nodeAddrs.IPv4 = ip2.NextIP(cidrIP)
} else {
nodeAddrs.IPv6 = ip2.NextIP(cidrIP)
}
return nil
}
if node.Spec.PodCIDRs != nil {
for _, podCIDR := range node.Spec.PodCIDRs {
if err := parseIP(podCIDR); err != nil {
return nil, err
}
}
return nodeAddrs, nil
}
if err := parseIP(node.Spec.PodCIDR); err != nil {
return nil, err
}
return nodeAddrs, nil
}
// GetNodeAllAddrs gets all Node IPs from the Node.
func GetNodeAllAddrs(node *v1.Node) (ips sets.String, err error) {
var nodeIPs, gwIPs, transportAddrs *ip.DualStackIPs
ips = sets.String{}
appendIP := func(dsIPs *ip.DualStackIPs) {
if dsIPs == nil {
return
}
if dsIPs.IPv4 != nil {
ips.Insert(dsIPs.IPv4.String())
}
if dsIPs.IPv6 != nil {
ips.Insert(dsIPs.IPv6.String())
}
}
if nodeIPs, err = GetNodeAddrs(node); err != nil {
return
}
appendIP(nodeIPs)
if gwIPs, err = GetNodeGatewayAddrs(node); err != nil {
return
}
appendIP(gwIPs)
if transportAddrs, err = GetNodeAddrsFromAnnotations(node, types.NodeTransportAddressAnnotationKey); err != nil {
return
}
appendIP(transportAddrs)
return
}