/
mapper_endpoints.go
149 lines (126 loc) · 4.35 KB
/
mapper_endpoints.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
148
149
package translations
import (
"fmt"
core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
endpoint "github.com/envoyproxy/go-control-plane/envoy/config/endpoint/v3"
"github.com/envoyproxy/go-control-plane/pkg/cache/types"
v1 "k8s.io/api/core/v1"
discoveryv1 "k8s.io/api/discovery/v1"
"k8s.io/utils/pointer"
)
type locality struct {
Zone string
SubZone string
}
type endpointMeta struct {
ipFamily v1.IPFamily
ip string
port int32
locality locality
}
type endpointState struct {
ready bool
serving bool
terminating bool
}
func (km *KubeMapper) extractEndpointMetaAndState(endpointslices []*discoveryv1.EndpointSlice) map[endpointMeta]endpointState {
res := make(map[endpointMeta]endpointState)
// extract unique {ip, port, zone, node} tuples
for _, endpointslice := range endpointslices {
ipFamily := v1.IPv4Protocol
if endpointslice.AddressType == discoveryv1.AddressTypeIPv6 {
ipFamily = v1.IPv6Protocol
}
for _, port := range endpointslice.Ports {
for _, endpoint := range endpointslice.Endpoints {
res[endpointMeta{
ipFamily: ipFamily,
ip: endpoint.Addresses[0],
port: pointer.Int32Deref(port.Port, 0),
locality: locality{
Zone: pointer.StringDeref(endpoint.Zone, "None"),
SubZone: pointer.StringDeref(endpoint.NodeName, "None"),
},
}] = endpointState{
ready: pointer.BoolDeref(endpoint.Conditions.Ready, true),
serving: pointer.BoolDeref(endpoint.Conditions.Serving, true),
terminating: pointer.BoolDeref(endpoint.Conditions.Terminating, false),
}
}
}
}
return res
}
func (km *KubeMapper) mapEndpointMetaAndStateToEndpoint(meta endpointMeta, state endpointState) *endpoint.LbEndpoint {
healthStatus := core.HealthStatus_HEALTHY
if state.terminating {
healthStatus = core.HealthStatus_DRAINING
}
if !state.ready {
healthStatus = core.HealthStatus_UNHEALTHY
}
return &endpoint.LbEndpoint{
HealthStatus: healthStatus,
HostIdentifier: &endpoint.LbEndpoint_Endpoint{
Endpoint: &endpoint.Endpoint{
Hostname: fmt.Sprintf("%s-%d", meta.ip, meta.port),
Address: &core.Address{
Address: &core.Address_SocketAddress{
SocketAddress: &core.SocketAddress{
Protocol: core.SocketAddress_TCP,
Address: meta.ip,
PortSpecifier: &core.SocketAddress_PortValue{
PortValue: uint32(meta.port),
},
},
},
},
},
},
}
}
// MapEndpointSliceToLocalityEndpoints maps endpointslices to a cluster load assignment.
func (km *KubeMapper) MapEndpointSliceToLocalityEndpoints(svc *v1.Service, endpointslices []*discoveryv1.EndpointSlice) []types.Resource {
loadAssignmentsMap := make(map[string]*endpoint.ClusterLoadAssignment)
endpoints := make(map[string]map[locality][]*endpoint.LbEndpoint)
for meta, state := range km.extractEndpointMetaAndState(endpointslices) {
clusterName := getClusterName(svc.Namespace, svc.Name, string(meta.ipFamily), meta.port)
// create cluster key if not existing
if _, ok := loadAssignmentsMap[clusterName]; !ok {
loadAssignmentsMap[clusterName] = &endpoint.ClusterLoadAssignment{
ClusterName: clusterName,
Endpoints: []*endpoint.LocalityLbEndpoints{},
}
}
// make sure DS are ready
if _, ok := endpoints[clusterName]; !ok {
endpoints[clusterName] = make(map[locality][]*endpoint.LbEndpoint)
}
if _, ok := endpoints[clusterName][meta.locality]; !ok {
endpoints[clusterName][meta.locality] = make([]*endpoint.LbEndpoint, 0, 1)
}
endpoints[clusterName][meta.locality] = append(endpoints[clusterName][meta.locality], km.mapEndpointMetaAndStateToEndpoint(meta, state))
}
// Assign endpoints to loadAssignments
for clusterName, loadAssignment := range loadAssignmentsMap {
for locality, endpoints := range endpoints[clusterName] {
loadAssignment.Endpoints = append(loadAssignment.Endpoints, &endpoint.LocalityLbEndpoints{
Locality: &core.Locality{
Zone: locality.Zone,
SubZone: locality.SubZone,
},
LbEndpoints: endpoints,
})
}
}
loadAssignments := make([]*endpoint.ClusterLoadAssignment, 0, len(loadAssignmentsMap))
for _, value := range loadAssignmentsMap {
loadAssignments = append(loadAssignments, value)
}
// Map to proper type
resources := make([]types.Resource, len(loadAssignments))
for idx := range loadAssignments {
resources[idx] = loadAssignments[idx]
}
return resources
}