/
ingresses.go
148 lines (124 loc) · 4.05 KB
/
ingresses.go
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package kor
import (
"bytes"
"context"
"encoding/json"
"fmt"
"os"
v1 "k8s.io/api/networking/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
_ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
"github.com/yonahd/kor/pkg/filters"
)
func validateServiceBackend(clientset kubernetes.Interface, namespace string, backend *v1.IngressBackend) bool {
if backend.Service != nil {
serviceName := backend.Service.Name
_, err := clientset.CoreV1().Services(namespace).Get(context.TODO(), serviceName, metav1.GetOptions{})
if err != nil {
return false
}
}
return true
}
func retrieveUsedIngress(clientset kubernetes.Interface, namespace string, filterOpts *filters.Options) ([]string, error) {
ingresses, err := clientset.NetworkingV1().Ingresses(namespace).List(context.TODO(), metav1.ListOptions{LabelSelector: filterOpts.IncludeLabels})
if err != nil {
return nil, err
}
usedIngresses := []string{}
for _, ingress := range ingresses.Items {
if pass, _ := filter.Run(filterOpts); pass {
continue
}
used := true
if ingress.Spec.DefaultBackend != nil {
used = validateServiceBackend(clientset, namespace, ingress.Spec.DefaultBackend)
}
for _, rule := range ingress.Spec.Rules {
if rule.HTTP == nil {
used = true
break
}
for _, path := range rule.HTTP.Paths {
used = validateServiceBackend(clientset, namespace, &path.Backend)
if used {
break
}
}
if used {
break
}
}
if used {
usedIngresses = append(usedIngresses, ingress.Name)
}
}
return usedIngresses, nil
}
func retrieveIngressNames(clientset kubernetes.Interface, namespace string, filterOpts *filters.Options) ([]string, []string, error) {
ingresses, err := clientset.NetworkingV1().Ingresses(namespace).List(context.TODO(), metav1.ListOptions{LabelSelector: filterOpts.IncludeLabels})
if err != nil {
return nil, nil, err
}
var unusedIngressNames []string
names := make([]string, 0, len(ingresses.Items))
for _, ingress := range ingresses.Items {
if pass, _ := filter.SetObject(&ingress).Run(filterOpts); pass {
continue
}
if ingress.Labels["kor/used"] == "false" {
unusedIngressNames = append(unusedIngressNames, ingress.Name)
continue
}
names = append(names, ingress.Name)
}
return names, unusedIngressNames, nil
}
func processNamespaceIngresses(clientset kubernetes.Interface, namespace string, filterOpts *filters.Options) ([]string, error) {
usedIngresses, err := retrieveUsedIngress(clientset, namespace, filterOpts)
if err != nil {
return nil, err
}
ingressNames, unusedIngressNames, err := retrieveIngressNames(clientset, namespace, filterOpts)
if err != nil {
return nil, err
}
diff := CalculateResourceDifference(usedIngresses, ingressNames)
diff = append(diff, unusedIngressNames...)
return diff, nil
}
func GetUnusedIngresses(filterOpts *filters.Options, clientset kubernetes.Interface, outputFormat string, opts Opts) (string, error) {
var outputBuffer bytes.Buffer
namespaces := filterOpts.Namespaces(clientset)
response := make(map[string]map[string][]string)
for _, namespace := range namespaces {
diff, err := processNamespaceIngresses(clientset, namespace, filterOpts)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to process namespace %s: %v\n", namespace, err)
continue
}
if opts.DeleteFlag {
if diff, err = DeleteResource(diff, clientset, namespace, "Ingress", opts.NoInteractive); err != nil {
fmt.Fprintf(os.Stderr, "Failed to delete Ingress %s in namespace %s: %v\n", diff, namespace, err)
}
}
output := FormatOutput(namespace, diff, "Ingresses", opts)
if output != "" {
outputBuffer.WriteString(output)
outputBuffer.WriteString("\n")
resourceMap := make(map[string][]string)
resourceMap["Ingresses"] = diff
response[namespace] = resourceMap
}
}
jsonResponse, err := json.MarshalIndent(response, "", " ")
if err != nil {
return "", err
}
unusedIngresses, err := unusedResourceFormatter(outputFormat, outputBuffer, opts, jsonResponse)
if err != nil {
fmt.Printf("err: %v\n", err)
}
return unusedIngresses, nil
}