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add support for local schemas

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Yann Hamon 2020-05-30 18:28:04 +02:00
parent f82baa834c
commit 5f3504724f
3 changed files with 16 additions and 67 deletions
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2
Readme.md
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@ -13,6 +13,8 @@ Usage of ./bin/kubeconform:
version of Kubernetes to test against (default "1.18.0")
-output string
output format - text, json (default "text")
-schema value
file containing an additional Schema (can be specified multiple times)
-skipKinds string
comma-separated list of kinds to ignore
```

17
main.go
View file

@ -24,7 +24,7 @@ type validationResult struct {
// filter returns true if the file should be skipped
// Returning an array, this Reader might container multiple resources
func validateFile(f io.Reader, regs []*registry.KubernetesRegistry, k8sVersion string, skip func(signature resource.Signature)bool) []validationResult {
func validateFile(f io.Reader, regs []registry.Registry, k8sVersion string, skip func(signature resource.Signature)bool) []validationResult {
rawResource, err := ioutil.ReadAll(f)
if err != nil {
return []validationResult{{err: fmt.Errorf("failed reading file: %s", err)}}
@ -74,10 +74,11 @@ func (i *arrayFiles) Set(value string) error {
func realMain() int {
var files, dirs arrayFiles
var files, dirs, schemas arrayFiles
var skipKinds, k8sVersion, outputFormat string
flag.Var(&files, "file", "file to validate (can be specified multiple times)")
flag.Var(&dirs, "dir", "directory to validate (can be specified multiple times)")
flag.Var(&schemas, "schema", "file containing an additional Schema")
flag.StringVar(&k8sVersion, "k8sversion", "1.18.0", "version of Kubernetes to test against")
flag.StringVar(&skipKinds, "skipKinds", "", "comma-separated list of kinds to ignore")
flag.StringVar(&outputFormat, "output", "text", "output format - text, json")
@ -119,7 +120,15 @@ func realMain() int {
close(fileBatches)
}()
r := registry.NewKubernetesRegistry(false)
registries := []registry.Registry{}
registries = append(registries, registry.NewKubernetesRegistry(false))
if len(schemas) > 0 {
localRegistry, err := registry.NewLocalSchemas(schemas)
if err != nil {
log.Fatalf("%s", err)
}
registries = append(registries, localRegistry)
}
for fileBatch := range fileBatches {
for _, filename := range fileBatch {
@ -129,7 +138,7 @@ func realMain() int {
continue
}
res := validateFile(f, []*registry.KubernetesRegistry{r}, k8sVersion, filter)
res := validateFile(f, registries, k8sVersion, filter)
f.Close()

64
pkg/registry/registry.go
View file

@ -1,71 +1,9 @@
package registry
import (
"fmt"
"io/ioutil"
"net/http"
"strings"
)
type Manifest struct {
Kind, Version string
}
type Registry interface {
DownloadSchema(kind, apiVersion string) error
DownloadSchema(resourceKind, resourceAPIVersion, k8sVersion string) ([]byte, error)
}
type KubernetesRegistry struct {
baseURL string
strict bool
}
func NewKubernetesRegistry(strict bool) *KubernetesRegistry {
return &KubernetesRegistry{
baseURL: "https://kubernetesjsonschema.dev",
strict: strict,
}
}
func (r KubernetesRegistry) schemaURL(resourceKind, resourceAPIVersion, k8sVersion string) string {
normalisedVersion := k8sVersion
if normalisedVersion != "master" {
normalisedVersion = "v" + normalisedVersion
}
strictSuffix := ""
if r.strict {
strictSuffix = "-strict"
}
groupParts := strings.Split(resourceAPIVersion, "/")
versionParts := strings.Split(groupParts[0], ".")
kindSuffix := "-" + strings.ToLower(versionParts[0])
if len(groupParts) > 1 {
kindSuffix += "-" + strings.ToLower(groupParts[1])
}
return fmt.Sprintf("%s/%s-standalone%s/%s%s.json", r.baseURL, normalisedVersion, strictSuffix, strings.ToLower(resourceKind), kindSuffix)
}
func (r KubernetesRegistry) DownloadSchema(resourceKind, resourceAPIVersion, k8sVersion string) ([]byte, error) {
url := r.schemaURL(resourceKind, resourceAPIVersion, k8sVersion)
resp, err := http.Get(url)
if err != nil {
return []byte{}, fmt.Errorf("failed downloading schema at %s: %s", url, err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return []byte{}, fmt.Errorf("failed downloading schema at %s: %s", url, err)
}
fmt.Printf("downloaded %s\n", url)
return body, nil
}