-
Notifications
You must be signed in to change notification settings - Fork 7.6k
/
clusters.go
201 lines (173 loc) · 5.01 KB
/
clusters.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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
// Copyright Istio 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 cluster
import (
"fmt"
"sort"
"istio.io/istio/pkg/util/sets"
)
// Clusters is an ordered list of Cluster instances.
type Clusters []Cluster
func (c Clusters) Len() int {
return len(c)
}
// IsMulticluster is a utility method that indicates whether there are multiple Clusters available.
func (c Clusters) IsMulticluster() bool {
return c.Len() > 1
}
// Default returns the first cluster in the list.
func (c Clusters) Default() Cluster {
return c[0]
}
// GetOrDefault returns the given cluster if non-nil. Otherwise returns the first
// Cluster in the list.
func (c Clusters) GetOrDefault(cluster Cluster) Cluster {
if cluster != nil {
return cluster
}
return c.Default()
}
// GetByName returns the Cluster with the given name or nil if it is not in the list.
func (c Clusters) GetByName(name string) Cluster {
for _, cc := range c {
if cc.Name() == name {
return cc
}
}
return nil
}
// Contains returns true if a cluster with the given name is found in the list.
func (c Clusters) Contains(cc Cluster) bool {
return c.GetByName(cc.Name()) != nil
}
// Names returns the deduped list of names of the clusters.
func (c Clusters) Names() []string {
dedup := sets.String{}
for _, cc := range c {
dedup.Insert(cc.Name())
}
return dedup.UnsortedList()
}
type ClustersByNetwork map[string]Clusters
func (c ClustersByNetwork) Networks() []string {
out := make([]string, 0, len(c))
for n := range c {
out = append(out, n)
}
sort.Strings(out)
return out
}
// ByNetwork returns a map of network name to a subset of clusters
func (c Clusters) ByNetwork() ClustersByNetwork {
out := make(ClustersByNetwork)
for _, cc := range c {
out[cc.NetworkName()] = append(out[cc.NetworkName()], cc)
}
return out
}
// Networks returns the list of network names for the clusters.
func (c Clusters) Networks() []string {
return c.ByNetwork().Networks()
}
// ForNetworks returns the list of clusters in the given networks.
func (c Clusters) ForNetworks(networks ...string) Clusters {
out := make(Clusters, 0, len(c))
for _, cc := range c {
for _, network := range networks {
if cc.NetworkName() == network {
out = append(out, cc)
break
}
}
}
return out
}
// Primaries returns the subset that are primary clusters.
func (c Clusters) Primaries(excluded ...Cluster) Clusters {
return c.filterClusters(func(cc Cluster) bool {
return cc.IsPrimary()
}, exclude(excluded...))
}
// Exclude returns all clusters not given as input.
func (c Clusters) Exclude(excluded ...Cluster) Clusters {
return c.filterClusters(func(cc Cluster) bool {
return true
}, exclude(excluded...))
}
// Configs returns the subset that are config clusters.
func (c Clusters) Configs(excluded ...Cluster) Clusters {
return c.filterClusters(func(cc Cluster) bool {
return cc.IsConfig()
}, exclude(excluded...))
}
// Remotes returns the subset that are remote clusters.
func (c Clusters) Remotes(excluded ...Cluster) Clusters {
return c.filterClusters(func(cc Cluster) bool {
return cc.IsRemote()
}, exclude(excluded...))
}
// MeshClusters returns the subset that are not external control plane clusters.
func (c Clusters) MeshClusters(excluded ...Cluster) Clusters {
return c.filterClusters(func(cc Cluster) bool {
return !cc.IsExternalControlPlane()
}, exclude(excluded...))
}
// IsExternalControlPlane indicates whether the clusters are set up in an enternal
// control plane configuration. An external control plane is a primary cluster that
// gets its Istio configuration from a different cluster.
func (c Clusters) IsExternalControlPlane() bool {
for _, cc := range c {
if cc.IsExternalControlPlane() {
return true
}
}
return false
}
// Kube returns OfKind(cluster.Kubernetes)
func (c Clusters) Kube() Clusters {
return c.OfKind(Kubernetes)
}
// OfKind filters clusters by their Kind.
func (c Clusters) OfKind(kind Kind) Clusters {
return c.filterClusters(func(cc Cluster) bool {
return cc.Kind() == kind
}, none)
}
func none(Cluster) bool {
return false
}
func exclude(exclude ...Cluster) func(Cluster) bool {
return func(cc Cluster) bool {
for _, e := range exclude {
if cc.Name() == e.Name() {
return true
}
}
return false
}
}
func (c Clusters) filterClusters(included func(Cluster) bool,
excluded func(Cluster) bool,
) Clusters {
var out Clusters
for _, cc := range c {
if !excluded(cc) && included(cc) {
out = append(out, cc)
}
}
return out
}
func (c Clusters) String() string {
return fmt.Sprintf("%v", c.Names())
}