/
check.go
142 lines (125 loc) · 4.21 KB
/
check.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
// Copyright 2018 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 check
import (
"fmt"
"sort"
"strings"
"time"
"istio.io/istio/galley/pkg/source/kube/client"
"istio.io/istio/galley/pkg/source/kube/log"
sourceSchema "istio.io/istio/galley/pkg/source/kube/schema"
multierror "github.com/hashicorp/go-multierror"
"k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/wait"
)
var (
pollInterval = time.Second
pollTimeout = time.Minute
)
// ResourceTypesPresence verifies that all expected k8s resources types are
// present in the k8s apiserver.
func ResourceTypesPresence(k client.Interfaces, specs []sourceSchema.ResourceSpec) error {
cs, err := k.APIExtensionsClientset()
if err != nil {
return err
}
return resourceTypesPresence(cs, specs)
}
// FindSupportedResourceSchemas returns the list of supported resource schemas supported by the k8s apiserver.
func FindSupportedResourceSchemas(k client.Interfaces, specs []sourceSchema.ResourceSpec) ([]sourceSchema.ResourceSpec, error) {
cs, err := k.APIExtensionsClientset()
if err != nil {
return nil, err
}
return findSupportedResourceSchemas(cs, specs), nil
}
func findSupportedResourceSchemas(cs clientset.Interface, specs []sourceSchema.ResourceSpec) []sourceSchema.ResourceSpec {
var supportedSchemas []sourceSchema.ResourceSpec
for _, spec := range specs {
gv := schema.GroupVersion{Group: spec.Group, Version: spec.Version}.String()
list, err := cs.Discovery().ServerResourcesForGroupVersion(gv)
if err != nil {
log.Scope.Warnf("could not find %v; %v", gv, err)
continue
}
found := false
for _, r := range list.APIResources {
if r.Name == spec.Plural {
found = true
break
}
}
if found {
supportedSchemas = append(supportedSchemas, spec)
} else {
log.Scope.Infof("kubernetes resource type %q not found (collection %q)",
spec.CanonicalResourceName(), spec.Target.Collection)
}
}
sort.Slice(supportedSchemas, func(i, j int) bool {
return strings.Compare(supportedSchemas[i].CanonicalResourceName(), supportedSchemas[j].CanonicalResourceName()) < 0
})
return supportedSchemas
}
func resourceTypesPresence(cs clientset.Interface, specs []sourceSchema.ResourceSpec) error {
search := make(map[string]*sourceSchema.ResourceSpec, len(specs))
for i, spec := range specs {
search[spec.Plural] = &specs[i]
}
err := wait.Poll(pollInterval, pollTimeout, func() (bool, error) {
var errs error
nextResource:
for plural, spec := range search {
gv := schema.GroupVersion{Group: spec.Group, Version: spec.Version}.String()
list, err := cs.Discovery().ServerResourcesForGroupVersion(gv)
if err != nil {
errs = multierror.Append(errs, fmt.Errorf("could not find %v: %v", gv, err))
continue nextResource
}
found := false
for _, r := range list.APIResources {
if r.Name == spec.Plural {
delete(search, plural)
found = true
break
}
}
if !found {
log.Scope.Warnf("%s resource type not found", spec.CanonicalResourceName())
}
}
if len(search) == 0 {
return true, nil
}
// entire search failed
if errs != nil {
return true, errs
}
// check again next poll
return false, nil
})
if err != nil {
var notFound []string
for _, spec := range search {
notFound = append(notFound, spec.Kind)
}
log.Scope.Errorf("Expected resources (CRDs) not found: %v", notFound)
log.Scope.Error("To stop Galley from waiting for these resources (CRDs), consider using the --excludedResourceKinds flag")
return fmt.Errorf("%v: the following resource type(s) were not found: %v", err, notFound)
}
log.Scope.Infof("Discovered all supported resources (# = %v)", len(specs))
return nil
}