forked from kubernetes/kops
-
Notifications
You must be signed in to change notification settings - Fork 0
/
populate_cluster_spec.go
281 lines (234 loc) · 8.24 KB
/
populate_cluster_spec.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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
package cloudup
import (
"encoding/binary"
"fmt"
"github.com/golang/glog"
"k8s.io/kops/upup/models"
"k8s.io/kops/upup/pkg/api"
"k8s.io/kops/upup/pkg/api/registry"
"k8s.io/kops/upup/pkg/fi"
"k8s.io/kops/upup/pkg/fi/loader"
"k8s.io/kops/upup/pkg/fi/utils"
"k8s.io/kops/util/pkg/vfs"
"net"
"strings"
"text/template"
)
var EtcdClusters = []string{"main", "events"}
type populateClusterSpec struct {
// InputCluster is the api object representing the whole cluster, as input by the user
// We build it up into a complete config, but we write the values as input
InputCluster *api.Cluster
// ModelStore is the location where models are found
ModelStore vfs.Path
// Models is a list of cloudup models to apply
Models []string
// fullCluster holds the built completed cluster spec
fullCluster *api.Cluster
}
func findModelStore() (vfs.Path, error) {
p := models.NewAssetPath("")
return p, nil
}
// PopulateClusterSpec takes a user-specified cluster spec, and computes the full specification that should be set on the cluster.
// We do this so that we don't need any real "brains" on the node side.
func PopulateClusterSpec(cluster *api.Cluster) (*api.Cluster, error) {
modelStore, err := findModelStore()
if err != nil {
return nil, err
}
c := &populateClusterSpec{
InputCluster: cluster,
ModelStore: modelStore,
Models: []string{"config"},
}
err = c.run()
if err != nil {
return nil, err
}
return c.fullCluster, nil
}
func (c *populateClusterSpec) run() error {
err := c.InputCluster.Validate(false)
if err != nil {
return err
}
// Copy cluster & instance groups, so we can modify them freely
cluster := &api.Cluster{}
utils.JsonMergeStruct(cluster, c.InputCluster)
err = c.assignSubnets(cluster)
if err != nil {
return err
}
err = cluster.FillDefaults()
if err != nil {
return err
}
// TODO: Move to validate?
// Check that instance groups are defined in valid zones
{
clusterZones := make(map[string]*api.ClusterZoneSpec)
for _, z := range cluster.Spec.Zones {
if clusterZones[z.Name] != nil {
return fmt.Errorf("Zones contained a duplicate value: %v", z.Name)
}
clusterZones[z.Name] = z
}
// Check etcd configuration
{
for i, etcd := range cluster.Spec.EtcdClusters {
if etcd.Name == "" {
return fmt.Errorf("EtcdClusters #%d did not specify a Name", i)
}
for i, m := range etcd.Members {
if m.Name == "" {
return fmt.Errorf("EtcdMember #%d of etcd-cluster %s did not specify a Name", i, etcd.Name)
}
if fi.StringValue(m.Zone) == "" {
return fmt.Errorf("EtcdMember %s:%s did not specify a Zone", etcd.Name, m.Name)
}
}
etcdZones := make(map[string]*api.EtcdMemberSpec)
etcdNames := make(map[string]*api.EtcdMemberSpec)
for _, m := range etcd.Members {
if etcdNames[m.Name] != nil {
return fmt.Errorf("EtcdMembers found with same name %q in etcd-cluster %q", m.Name, etcd.Name)
}
zone := fi.StringValue(m.Zone)
if etcdZones[zone] != nil {
// Maybe this should just be a warning
return fmt.Errorf("EtcdMembers are in the same zone %q in etcd-cluster %q", zone, etcd.Name)
}
if clusterZones[zone] == nil {
return fmt.Errorf("EtcdMembers for %q is configured in zone %q, but that is not configured at the k8s-cluster level", etcd.Name, m.Zone)
}
etcdZones[zone] = m
}
if (len(etcdZones) % 2) == 0 {
// Not technically a requirement, but doesn't really make sense to allow
return fmt.Errorf("There should be an odd number of master-zones, for etcd's quorum. Hint: Use --zones and --master-zones to declare node zones and master zones separately.")
}
}
}
}
keyStore, err := registry.KeyStore(cluster)
if err != nil {
return err
}
// Always assume a dry run during this phase
keyStore.(*fi.VFSCAStore).DryRun = true
secretStore, err := registry.SecretStore(cluster)
if err != nil {
return err
}
if vfs.IsClusterReadable(secretStore.VFSPath()) {
vfsPath := secretStore.VFSPath()
cluster.Spec.SecretStore = vfsPath.Path()
} else {
// We could implement this approach, but it seems better to get all clouds using cluster-readable storage
return fmt.Errorf("secrets path is not cluster readable: %v", secretStore.VFSPath())
}
if vfs.IsClusterReadable(keyStore.VFSPath()) {
vfsPath := keyStore.VFSPath()
cluster.Spec.KeyStore = vfsPath.Path()
} else {
// We could implement this approach, but it seems better to get all clouds using cluster-readable storage
return fmt.Errorf("keyStore path is not cluster readable: %v", keyStore.VFSPath())
}
configBase, err := vfs.Context.BuildVfsPath(cluster.Spec.ConfigBase)
if err != nil {
return fmt.Errorf("error parsing ConfigBase %q: %v", cluster.Spec.ConfigBase, err)
}
if vfs.IsClusterReadable(configBase) {
cluster.Spec.ConfigStore = configBase.Path()
} else {
// We could implement this approach, but it seems better to get all clouds using cluster-readable storage
return fmt.Errorf("ConfigBase path is not cluster readable: %v", cluster.Spec.ConfigBase)
}
// Normalize k8s version
versionWithoutV := strings.TrimSpace(cluster.Spec.KubernetesVersion)
if strings.HasPrefix(versionWithoutV, "v") {
versionWithoutV = versionWithoutV[1:]
}
if cluster.Spec.KubernetesVersion != versionWithoutV {
glog.V(2).Infof("Normalizing kubernetes version: %q -> %q", cluster.Spec.KubernetesVersion, versionWithoutV)
cluster.Spec.KubernetesVersion = versionWithoutV
}
cloud, err := BuildCloud(cluster)
if err != nil {
return err
}
if cluster.Spec.DNSZone == "" {
dnsZone, err := cloud.FindDNSHostedZone(cluster.Name)
if err != nil {
return fmt.Errorf("Error determining default DNS zone; please specify --dns-zone: %v", err)
}
glog.Infof("Defaulting DNS zone to: %s", dnsZone)
cluster.Spec.DNSZone = dnsZone
}
tags, err := buildCloudupTags(cluster)
if err != nil {
return err
}
tf := &TemplateFunctions{
cluster: cluster,
tags: tags,
}
templateFunctions := make(template.FuncMap)
tf.AddTo(templateFunctions)
specBuilder := &SpecBuilder{
OptionsLoader: loader.NewOptionsLoader(templateFunctions),
Tags: tags,
}
completed, err := specBuilder.BuildCompleteSpec(&cluster.Spec, c.ModelStore, c.Models)
if err != nil {
return fmt.Errorf("error building complete spec: %v", err)
}
fullCluster := &api.Cluster{}
*fullCluster = *cluster
fullCluster.Spec = *completed
tf.cluster = fullCluster
err = fullCluster.Validate(true)
if err != nil {
return fmt.Errorf("Completed cluster failed validation: %v", err)
}
c.fullCluster = fullCluster
return nil
}
func (c *populateClusterSpec) assignSubnets(cluster *api.Cluster) error {
if cluster.Spec.NonMasqueradeCIDR == "" {
glog.Warningf("NonMasqueradeCIDR not set; can't auto-assign dependent subnets")
return nil
}
_, nonMasqueradeCIDR, err := net.ParseCIDR(cluster.Spec.NonMasqueradeCIDR)
if err != nil {
return fmt.Errorf("error parsing NonMasqueradeCIDR %q: %v", cluster.Spec.NonMasqueradeCIDR, err)
}
nmOnes, nmBits := nonMasqueradeCIDR.Mask.Size()
if cluster.Spec.KubeControllerManager == nil {
cluster.Spec.KubeControllerManager = &api.KubeControllerManagerConfig{}
}
if cluster.Spec.KubeControllerManager.ClusterCIDR == "" {
// Allocate as big a range as possible: the NonMasqueradeCIDR mask + 1, with a '1' in the extra bit
ip := nonMasqueradeCIDR.IP.Mask(nonMasqueradeCIDR.Mask)
ip4 := ip.To4()
if ip4 != nil {
n := binary.BigEndian.Uint32(ip4)
n += uint32(1 << uint(nmBits-nmOnes-1))
ip = make(net.IP, len(ip4))
binary.BigEndian.PutUint32(ip, n)
} else {
return fmt.Errorf("IPV6 subnet computations not yet implements")
}
cidr := net.IPNet{IP: ip, Mask: net.CIDRMask(nmOnes+1, nmBits)}
cluster.Spec.KubeControllerManager.ClusterCIDR = cidr.String()
glog.V(2).Infof("Defaulted KubeControllerManager.ClusterCIDR to %v", cluster.Spec.KubeControllerManager.ClusterCIDR)
}
if cluster.Spec.ServiceClusterIPRange == "" {
// Allocate from the '0' subnet; but only carve off 1/4 of that (i.e. add 1 + 2 bits to the netmask)
cidr := net.IPNet{IP: nonMasqueradeCIDR.IP.Mask(nonMasqueradeCIDR.Mask), Mask: net.CIDRMask(nmOnes+3, nmBits)}
cluster.Spec.ServiceClusterIPRange = cidr.String()
glog.V(2).Infof("Defaulted ServiceClusterIPRange to %v", cluster.Spec.ServiceClusterIPRange)
}
return nil
}