/
parse.go
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/
parse.go
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package parser
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"strings"
"gopkg.in/yaml.v3"
appsv1 "k8s.io/api/apps/v1"
appsv1beta1 "k8s.io/api/apps/v1beta1"
appsv1beta2 "k8s.io/api/apps/v1beta2"
autoscalingv1 "k8s.io/api/autoscaling/v1"
autoscalingv2beta1 "k8s.io/api/autoscaling/v2beta1"
autoscalingv2beta2 "k8s.io/api/autoscaling/v2beta2"
batchv1 "k8s.io/api/batch/v1"
batchv1beta1 "k8s.io/api/batch/v1beta1"
corev1 "k8s.io/api/core/v1"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
networkingv1 "k8s.io/api/networking/v1"
networkingv1beta1 "k8s.io/api/networking/v1beta1"
policyv1 "k8s.io/api/policy/v1"
policyv1beta1 "k8s.io/api/policy/v1beta1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/runtime/serializer"
"github.com/younes-bami/kube-score/config"
ks "github.com/younes-bami/kube-score/domain"
"github.com/younes-bami/kube-score/parser/internal"
internalcronjob "github.com/younes-bami/kube-score/parser/internal/cronjob"
internalnetpol "github.com/younes-bami/kube-score/parser/internal/networkpolicy"
internalpdb "github.com/younes-bami/kube-score/parser/internal/pdb"
internalpod "github.com/younes-bami/kube-score/parser/internal/pod"
internalservice "github.com/younes-bami/kube-score/parser/internal/service"
)
type Parser struct {
scheme *runtime.Scheme
codecs serializer.CodecFactory
}
type schemaAdderFunc func(scheme *runtime.Scheme) error
func New() (*Parser, error) {
scheme := runtime.NewScheme()
p := &Parser{
scheme: scheme,
codecs: serializer.NewCodecFactory(scheme),
}
if err := p.addToScheme(); err != nil {
return nil, fmt.Errorf("failed to init: %w", err)
}
return p, nil
}
func (p *Parser) addToScheme() error {
var adders = []schemaAdderFunc{
corev1.AddToScheme,
appsv1.AddToScheme,
networkingv1.AddToScheme,
extensionsv1beta1.AddToScheme,
appsv1beta1.AddToScheme,
appsv1beta2.AddToScheme,
batchv1.AddToScheme,
batchv1beta1.AddToScheme,
policyv1beta1.AddToScheme,
policyv1.AddToScheme,
}
for _, adder := range adders {
if err := adder(p.scheme); err != nil {
return fmt.Errorf("failed to add type to schema: %w", err)
}
}
return nil
}
type detectKind struct {
ApiVersion string `yaml:"apiVersion"`
Kind string `yaml:"kind"`
}
type parsedObjects struct {
bothMetas []ks.BothMeta
pods []ks.Pod
podspecers []ks.PodSpecer
networkPolicies []ks.NetworkPolicy
services []ks.Service
podDisruptionBudgets []ks.PodDisruptionBudget
deployments []ks.Deployment
statefulsets []ks.StatefulSet
ingresses []ks.Ingress // supports multiple versions of ingress
cronjobs []ks.CronJob
hpaTargeters []ks.HpaTargeter // all versions of HPAs
}
func (p *parsedObjects) Services() []ks.Service {
return p.services
}
func (p *parsedObjects) Pods() []ks.Pod {
return p.pods
}
func (p *parsedObjects) PodSpeccers() []ks.PodSpecer {
return p.podspecers
}
func (p *parsedObjects) Ingresses() []ks.Ingress {
return p.ingresses
}
func (p *parsedObjects) PodDisruptionBudgets() []ks.PodDisruptionBudget {
return p.podDisruptionBudgets
}
func (p *parsedObjects) CronJobs() []ks.CronJob {
return p.cronjobs
}
func (p *parsedObjects) Deployments() []ks.Deployment {
return p.deployments
}
func (p *parsedObjects) StatefulSets() []ks.StatefulSet {
return p.statefulsets
}
func (p *parsedObjects) Metas() []ks.BothMeta {
return p.bothMetas
}
func (p *parsedObjects) NetworkPolicies() []ks.NetworkPolicy {
return p.networkPolicies
}
func (p *parsedObjects) HorizontalPodAutoscalers() []ks.HpaTargeter {
return p.hpaTargeters
}
func Empty() ks.AllTypes {
return &parsedObjects{}
}
func (p *Parser) ParseFiles(cnf config.Configuration) (ks.AllTypes, error) {
s := &parsedObjects{}
for _, namedReader := range cnf.AllFiles {
fullFile, err := ioutil.ReadAll(namedReader)
if err != nil {
return nil, err
}
// Convert to unix style newlines
fullFile = bytes.ReplaceAll(fullFile, []byte("\r\n"), []byte("\n"))
offset := 1 // Line numbers are 1 indexed
// Remove initial "---\n" if present
if bytes.HasPrefix(fullFile, []byte("---\n")) {
fullFile = fullFile[4:]
offset = 2
}
for _, fileContents := range bytes.Split(fullFile, []byte("\n---\n")) {
if len(bytes.TrimSpace(fileContents)) > 0 {
if err := p.detectAndDecode(cnf, s, namedReader.Name(), offset, fileContents); err != nil {
return nil, err
}
}
offset += 2 + bytes.Count(fileContents, []byte("\n"))
}
}
return s, nil
}
func (p *Parser) detectAndDecode(cnf config.Configuration, s *parsedObjects, fileName string, fileOffset int, raw []byte) error {
var detect detectKind
err := yaml.Unmarshal(raw, &detect)
if err != nil {
return err
}
detectedVersion := schema.FromAPIVersionAndKind(detect.ApiVersion, detect.Kind)
// Parse lists and their items recursively
if detectedVersion == corev1.SchemeGroupVersion.WithKind("List") {
var list corev1.List
err := p.decode(raw, &list)
if err != nil {
return err
}
for _, listItem := range list.Items {
err := p.detectAndDecode(cnf, s, fileName, fileOffset, listItem.Raw)
if err != nil {
return err
}
}
return nil
}
err = p.decodeItem(cnf, s, detectedVersion, fileName, fileOffset, raw)
if err != nil {
return err
}
return nil
}
func (p *Parser) decode(data []byte, object runtime.Object) error {
deserializer := p.codecs.UniversalDeserializer()
if _, _, err := deserializer.Decode(data, nil, object); err != nil {
gvk := object.GetObjectKind().GroupVersionKind()
return fmt.Errorf("Failed to parse %s: err=%w", gvk, err)
}
return nil
}
func detectFileLocation(fileName string, fileOffset int, fileContents []byte) ks.FileLocation {
// If the object YAML begins with a Helm style "# Source: " comment
// Use the information in there as the file name
firstRow := string(bytes.Split(fileContents, []byte("\n"))[0])
helmTemplatePrefix := "# Source: "
if strings.HasPrefix(firstRow, helmTemplatePrefix) {
return ks.FileLocation{
Name: firstRow[len(helmTemplatePrefix):],
Line: 1, // Set line to 1 as the line definition gets lost in Helm
}
}
return ks.FileLocation{
Name: fileName,
Line: fileOffset,
}
}
func (p *Parser) decodeItem(cnf config.Configuration, s *parsedObjects, detectedVersion schema.GroupVersionKind, fileName string, fileOffset int, fileContents []byte) error {
addPodSpeccer := func(ps ks.PodSpecer) {
s.podspecers = append(s.podspecers, ps)
s.bothMetas = append(s.bothMetas, ks.BothMeta{
TypeMeta: ps.GetTypeMeta(),
ObjectMeta: ps.GetObjectMeta(),
FileLocationer: ps,
})
}
fileLocation := detectFileLocation(fileName, fileOffset, fileContents)
var errs parseErrors
switch detectedVersion {
case corev1.SchemeGroupVersion.WithKind("Pod"):
var pod corev1.Pod
errs.AddIfErr(p.decode(fileContents, &pod))
p := internalpod.Pod{Obj: pod, Location: fileLocation}
s.pods = append(s.pods, p)
s.bothMetas = append(s.bothMetas, ks.BothMeta{TypeMeta: pod.TypeMeta, ObjectMeta: pod.ObjectMeta, FileLocationer: p})
case batchv1.SchemeGroupVersion.WithKind("Job"):
var job batchv1.Job
errs.AddIfErr(p.decode(fileContents, &job))
addPodSpeccer(internal.Batchv1Job{Job: job, Location: fileLocation})
case batchv1beta1.SchemeGroupVersion.WithKind("CronJob"):
var cronjob batchv1beta1.CronJob
errs.AddIfErr(p.decode(fileContents, &cronjob))
cjob := internalcronjob.CronJobV1beta1{Obj: cronjob, Location: fileLocation}
addPodSpeccer(cjob)
s.cronjobs = append(s.cronjobs, cjob)
case batchv1.SchemeGroupVersion.WithKind("CronJob"):
var cronjob batchv1.CronJob
errs.AddIfErr(p.decode(fileContents, &cronjob))
cjob := internalcronjob.CronJobV1{Obj: cronjob, Location: fileLocation}
addPodSpeccer(cjob)
s.cronjobs = append(s.cronjobs, cjob)
case appsv1.SchemeGroupVersion.WithKind("Deployment"):
var deployment appsv1.Deployment
errs.AddIfErr(p.decode(fileContents, &deployment))
deploy := internal.Appsv1Deployment{Obj: deployment, Location: fileLocation}
addPodSpeccer(deploy)
// TODO: Support older versions of Deployment as well?
s.deployments = append(s.deployments, deploy)
case appsv1beta1.SchemeGroupVersion.WithKind("Deployment"):
var deployment appsv1beta1.Deployment
errs.AddIfErr(p.decode(fileContents, &deployment))
addPodSpeccer(internal.Appsv1beta1Deployment{Deployment: deployment, Location: fileLocation})
case appsv1beta2.SchemeGroupVersion.WithKind("Deployment"):
var deployment appsv1beta2.Deployment
errs.AddIfErr(p.decode(fileContents, &deployment))
addPodSpeccer(internal.Appsv1beta2Deployment{Deployment: deployment, Location: fileLocation})
case extensionsv1beta1.SchemeGroupVersion.WithKind("Deployment"):
var deployment extensionsv1beta1.Deployment
errs.AddIfErr(p.decode(fileContents, &deployment))
addPodSpeccer(internal.Extensionsv1beta1Deployment{Deployment: deployment, Location: fileLocation})
case appsv1.SchemeGroupVersion.WithKind("StatefulSet"):
var statefulSet appsv1.StatefulSet
errs.AddIfErr(p.decode(fileContents, &statefulSet))
sset := internal.Appsv1StatefulSet{Obj: statefulSet, Location: fileLocation}
addPodSpeccer(sset)
// TODO: Support older versions of StatefulSet as well?
s.statefulsets = append(s.statefulsets, sset)
case appsv1beta1.SchemeGroupVersion.WithKind("StatefulSet"):
var statefulSet appsv1beta1.StatefulSet
errs.AddIfErr(p.decode(fileContents, &statefulSet))
addPodSpeccer(internal.Appsv1beta1StatefulSet{StatefulSet: statefulSet, Location: fileLocation})
case appsv1beta2.SchemeGroupVersion.WithKind("StatefulSet"):
var statefulSet appsv1beta2.StatefulSet
errs.AddIfErr(p.decode(fileContents, &statefulSet))
addPodSpeccer(internal.Appsv1beta2StatefulSet{StatefulSet: statefulSet, Location: fileLocation})
case appsv1.SchemeGroupVersion.WithKind("DaemonSet"):
var daemonset appsv1.DaemonSet
errs.AddIfErr(p.decode(fileContents, &daemonset))
addPodSpeccer(internal.Appsv1DaemonSet{DaemonSet: daemonset, Location: fileLocation})
case appsv1beta2.SchemeGroupVersion.WithKind("DaemonSet"):
var daemonset appsv1beta2.DaemonSet
errs.AddIfErr(p.decode(fileContents, &daemonset))
addPodSpeccer(internal.Appsv1beta2DaemonSet{DaemonSet: daemonset, Location: fileLocation})
case extensionsv1beta1.SchemeGroupVersion.WithKind("DaemonSet"):
var daemonset extensionsv1beta1.DaemonSet
errs.AddIfErr(p.decode(fileContents, &daemonset))
addPodSpeccer(internal.Extensionsv1beta1DaemonSet{DaemonSet: daemonset, Location: fileLocation})
case networkingv1.SchemeGroupVersion.WithKind("NetworkPolicy"):
var netpol networkingv1.NetworkPolicy
errs.AddIfErr(p.decode(fileContents, &netpol))
np := internalnetpol.NetworkPolicy{Obj: netpol, Location: fileLocation}
s.networkPolicies = append(s.networkPolicies, np)
s.bothMetas = append(s.bothMetas, ks.BothMeta{TypeMeta: netpol.TypeMeta, ObjectMeta: netpol.ObjectMeta, FileLocationer: np})
case corev1.SchemeGroupVersion.WithKind("Service"):
var service corev1.Service
errs.AddIfErr(p.decode(fileContents, &service))
serv := internalservice.Service{Obj: service, Location: fileLocation}
s.services = append(s.services, serv)
s.bothMetas = append(s.bothMetas, ks.BothMeta{TypeMeta: service.TypeMeta, ObjectMeta: service.ObjectMeta, FileLocationer: serv})
case policyv1beta1.SchemeGroupVersion.WithKind("PodDisruptionBudget"):
var disruptBudget policyv1beta1.PodDisruptionBudget
errs.AddIfErr(p.decode(fileContents, &disruptBudget))
dbug := internalpdb.PodDisruptionBudgetV1beta1{Obj: disruptBudget, Location: fileLocation}
s.podDisruptionBudgets = append(s.podDisruptionBudgets, dbug)
s.bothMetas = append(s.bothMetas, ks.BothMeta{TypeMeta: disruptBudget.TypeMeta, ObjectMeta: disruptBudget.ObjectMeta, FileLocationer: dbug})
case policyv1.SchemeGroupVersion.WithKind("PodDisruptionBudget"):
var disruptBudget policyv1.PodDisruptionBudget
errs.AddIfErr(p.decode(fileContents, &disruptBudget))
dbug := internalpdb.PodDisruptionBudgetV1{Obj: disruptBudget, Location: fileLocation}
s.podDisruptionBudgets = append(s.podDisruptionBudgets, dbug)
s.bothMetas = append(s.bothMetas, ks.BothMeta{
TypeMeta: disruptBudget.TypeMeta,
ObjectMeta: disruptBudget.ObjectMeta,
FileLocationer: dbug,
})
case extensionsv1beta1.SchemeGroupVersion.WithKind("Ingress"):
var ingress extensionsv1beta1.Ingress
errs.AddIfErr(p.decode(fileContents, &ingress))
ing := internal.ExtensionsIngressV1beta1{Ingress: ingress, Location: fileLocation}
s.ingresses = append(s.ingresses, ing)
s.bothMetas = append(s.bothMetas, ks.BothMeta{TypeMeta: ingress.TypeMeta, ObjectMeta: ingress.ObjectMeta, FileLocationer: ing})
case networkingv1beta1.SchemeGroupVersion.WithKind("Ingress"):
var ingress networkingv1beta1.Ingress
errs.AddIfErr(p.decode(fileContents, &ingress))
ing := internal.IngressV1beta1{Ingress: ingress, Location: fileLocation}
s.ingresses = append(s.ingresses, ing)
s.bothMetas = append(s.bothMetas, ks.BothMeta{TypeMeta: ingress.TypeMeta, ObjectMeta: ingress.ObjectMeta, FileLocationer: ing})
case networkingv1.SchemeGroupVersion.WithKind("Ingress"):
var ingress networkingv1.Ingress
errs.AddIfErr(p.decode(fileContents, &ingress))
ing := internal.IngressV1{Ingress: ingress, Location: fileLocation}
s.ingresses = append(s.ingresses, ing)
s.bothMetas = append(s.bothMetas, ks.BothMeta{TypeMeta: ingress.TypeMeta, ObjectMeta: ingress.ObjectMeta, FileLocationer: ing})
case autoscalingv1.SchemeGroupVersion.WithKind("HorizontalPodAutoscaler"):
var hpa autoscalingv1.HorizontalPodAutoscaler
errs.AddIfErr(p.decode(fileContents, &hpa))
h := internal.HPAv1{HorizontalPodAutoscaler: hpa, Location: fileLocation}
s.hpaTargeters = append(s.hpaTargeters, h)
s.bothMetas = append(s.bothMetas, ks.BothMeta{TypeMeta: hpa.TypeMeta, ObjectMeta: hpa.ObjectMeta, FileLocationer: h})
case autoscalingv2beta1.SchemeGroupVersion.WithKind("HorizontalPodAutoscaler"):
var hpa autoscalingv2beta1.HorizontalPodAutoscaler
errs.AddIfErr(p.decode(fileContents, &hpa))
h := internal.HPAv2beta1{HorizontalPodAutoscaler: hpa, Location: fileLocation}
s.hpaTargeters = append(s.hpaTargeters, h)
s.bothMetas = append(s.bothMetas, ks.BothMeta{TypeMeta: hpa.TypeMeta, ObjectMeta: hpa.ObjectMeta, FileLocationer: h})
case autoscalingv2beta2.SchemeGroupVersion.WithKind("HorizontalPodAutoscaler"):
var hpa autoscalingv2beta2.HorizontalPodAutoscaler
errs.AddIfErr(p.decode(fileContents, &hpa))
h := internal.HPAv2beta2{HorizontalPodAutoscaler: hpa, Location: fileLocation}
s.hpaTargeters = append(s.hpaTargeters, h)
s.bothMetas = append(s.bothMetas, ks.BothMeta{
TypeMeta: hpa.TypeMeta,
ObjectMeta: hpa.ObjectMeta,
FileLocationer: h,
})
default:
if cnf.VerboseOutput > 1 {
log.Printf("Unknown datatype: %s", detectedVersion.String())
}
}
if errs.Any() {
return errs
}
return nil
}