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load.go
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load.go
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package externalplugincfg
import (
"context"
"strings"
"github.com/jenkins-x/lighthouse/pkg/util"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"sigs.k8s.io/yaml"
)
func LoadDisabledPlugins(l *logrus.Entry, client kubernetes.Interface, namespace string) ([]string, error) {
answer := []string{}
ctx := context.TODO()
l = l.WithFields(map[string]interface{}{
"Namespace": namespace,
"ConfigMap": ConfigMapName,
})
cm, err := client.CoreV1().ConfigMaps(namespace).Get(ctx, ConfigMapName, metav1.GetOptions{})
if err != nil {
if apierrors.IsNotFound(err) {
l.Warnf("no ConfigMap for the external plugin configuration")
return answer, nil
}
if err != nil {
return nil, errors.Wrapf(err, "failed to load ConfigMap %s in namespace %s", ConfigMapName, namespace)
}
}
text := ""
if cm != nil && cm.Data != nil {
text = cm.Data["config.yaml"]
}
if text == "" {
l.Warnf("no config.yaml entry in external plugin ConfigMap")
return answer, nil
}
var externalPlugins []ExternalPlugin
err = yaml.Unmarshal([]byte(text), &externalPlugins)
if err != nil {
return answer, errors.Wrapf(err, "failed to unmarshal external plugin configuration")
}
for _, p := range externalPlugins {
if util.StringArrayIndex(answer, p.Name) >= 0 {
continue
}
for _, r := range p.RequiredResources {
exists, err := CheckResourceExists(ctx, client, namespace, r)
if err != nil {
return answer, errors.Wrapf(err, "failed to check if resource exists %s", r.String())
}
if !exists {
l.WithField("ExternalPlugin", p.Name).Infof("disabling external plugin as resource is not available %s", r.String())
answer = append(answer, p.Name)
break
}
}
}
return answer, nil
}
// CheckResourceExists checks if a service exists
func CheckResourceExists(ctx context.Context, client kubernetes.Interface, namespace string, r Resource) (bool, error) {
k := strings.ToLower(r.Kind)
ns := r.Namespace
if ns == "" {
ns = namespace
}
name := r.Name
if name == "" {
return true, nil
}
if k == "service" {
_, err := client.CoreV1().Services(ns).Get(ctx, name, metav1.GetOptions{})
if apierrors.IsNotFound(err) {
return false, nil
}
if err != nil {
return false, errors.Wrapf(err, "failed to find Service %s/%s", ns, name)
}
return true, nil
}
// TODO
return true, nil
}