/
helper.go
173 lines (156 loc) · 5.34 KB
/
helper.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
package builder
import (
"fmt"
"net/http"
"regexp"
goruntime "runtime"
"runtime/debug"
"strconv"
"strings"
"time"
"golang.org/x/mod/semver"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/apimachinery/pkg/version"
openapinamer "k8s.io/apiserver/pkg/endpoints/openapi"
"k8s.io/apiserver/pkg/registry/generic"
genericapiserver "k8s.io/apiserver/pkg/server"
"k8s.io/apiserver/pkg/util/openapi"
k8sscheme "k8s.io/client-go/kubernetes/scheme"
k8stracing "k8s.io/component-base/tracing"
"k8s.io/kube-openapi/pkg/common"
"github.com/grafana/grafana/pkg/apiserver/endpoints/filters"
)
// TODO: this is a temporary hack to make rest.Connecter work with resource level routes
var pathRewriters = []filters.PathRewriter{
{
Pattern: regexp.MustCompile(`(/apis/scope.grafana.app/v0alpha1/namespaces/.*/find$)`),
ReplaceFunc: func(matches []string) string {
return matches[1] + "/name" // connector requires a name
},
},
{
Pattern: regexp.MustCompile(`(/apis/query.grafana.app/v0alpha1/namespaces/.*/query$)`),
ReplaceFunc: func(matches []string) string {
return matches[1] + "/name" // connector requires a name
},
},
}
func SetupConfig(
scheme *runtime.Scheme,
serverConfig *genericapiserver.RecommendedConfig,
builders []APIGroupBuilder,
buildTimestamp int64,
buildVersion string,
buildCommit string,
buildBranch string,
) error {
defsGetter := GetOpenAPIDefinitions(builders)
serverConfig.OpenAPIConfig = genericapiserver.DefaultOpenAPIConfig(
openapi.GetOpenAPIDefinitionsWithoutDisabledFeatures(defsGetter),
openapinamer.NewDefinitionNamer(scheme, k8sscheme.Scheme))
serverConfig.OpenAPIV3Config = genericapiserver.DefaultOpenAPIV3Config(
openapi.GetOpenAPIDefinitionsWithoutDisabledFeatures(defsGetter),
openapinamer.NewDefinitionNamer(scheme, k8sscheme.Scheme))
// Add the custom routes to service discovery
serverConfig.OpenAPIV3Config.PostProcessSpec = getOpenAPIPostProcessor(buildVersion, builders)
serverConfig.OpenAPIV3Config.GetOperationIDAndTagsFromRoute = func(r common.Route) (string, []string, error) {
tags := []string{}
prop, ok := r.Metadata()["x-kubernetes-group-version-kind"]
if ok {
gvk, ok := prop.(metav1.GroupVersionKind)
if ok && gvk.Kind != "" {
tags = append(tags, gvk.Kind)
}
}
return r.OperationName(), tags, nil
}
// Set the swagger build versions
serverConfig.OpenAPIConfig.Info.Version = buildVersion
serverConfig.OpenAPIV3Config.Info.Version = buildVersion
serverConfig.SkipOpenAPIInstallation = false
serverConfig.BuildHandlerChainFunc = func(delegateHandler http.Handler, c *genericapiserver.Config) http.Handler {
// Call DefaultBuildHandlerChain on the main entrypoint http.Handler
// See https://github.com/kubernetes/apiserver/blob/v0.28.0/pkg/server/config.go#L906
// DefaultBuildHandlerChain provides many things, notably CORS, HSTS, cache-control, authz and latency tracking
requestHandler, err := getAPIHandler(
delegateHandler,
c.LoopbackClientConfig,
builders)
if err != nil {
panic(fmt.Sprintf("could not build handler chain func: %s", err.Error()))
}
handler := genericapiserver.DefaultBuildHandlerChain(requestHandler, c)
handler = filters.WithAcceptHeader(handler)
handler = filters.WithPathRewriters(handler, pathRewriters)
handler = k8stracing.WithTracing(handler, serverConfig.TracerProvider, "KubernetesAPI")
return handler
}
k8sVersion, err := getK8sApiserverVersion()
if err != nil {
return err
}
before, after, _ := strings.Cut(buildVersion, ".")
serverConfig.Version = &version.Info{
Major: before,
Minor: after,
GoVersion: goruntime.Version(),
Platform: fmt.Sprintf("%s/%s", goruntime.GOOS, goruntime.GOARCH),
Compiler: goruntime.Compiler,
GitTreeState: buildBranch,
GitCommit: buildCommit,
BuildDate: time.Unix(buildTimestamp, 0).UTC().Format(time.DateTime),
GitVersion: k8sVersion,
}
return nil
}
func InstallAPIs(
scheme *runtime.Scheme,
codecs serializer.CodecFactory,
server *genericapiserver.GenericAPIServer,
optsGetter generic.RESTOptionsGetter,
builders []APIGroupBuilder,
dualWrite bool,
) error {
for _, b := range builders {
g, err := b.GetAPIGroupInfo(scheme, codecs, optsGetter, dualWrite)
if err != nil {
return err
}
if g == nil || len(g.PrioritizedVersions) < 1 {
continue
}
err = server.InstallAPIGroup(g)
if err != nil {
return err
}
}
return nil
}
// find the k8s version according to build info
func getK8sApiserverVersion() (string, error) {
bi, ok := debug.ReadBuildInfo()
if !ok {
return "", fmt.Errorf("debug.ReadBuildInfo() failed")
}
if len(bi.Deps) == 0 {
return "v?.?", nil // this is normal while debugging
}
for _, dep := range bi.Deps {
if dep.Path == "k8s.io/apiserver" {
if !semver.IsValid(dep.Version) {
return "", fmt.Errorf("invalid semantic version for k8s.io/apiserver")
}
// v0 => v1
majorVersion := strings.TrimPrefix(semver.Major(dep.Version), "v")
majorInt, err := strconv.Atoi(majorVersion)
if err != nil {
return "", fmt.Errorf("could not convert majorVersion to int. majorVersion: %s", majorVersion)
}
newMajor := fmt.Sprintf("v%d", majorInt+1)
return strings.Replace(dep.Version, semver.Major(dep.Version), newMajor, 1), nil
}
}
return "", fmt.Errorf("could not find k8s.io/apiserver in build info")
}