615 lines
17 KiB
Go
615 lines
17 KiB
Go
//
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// Copyright (c) 2019-2021 Red Hat, Inc.
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// This program and the accompanying materials are made
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// available under the terms of the Eclipse Public License 2.0
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// which is available at https://www.eclipse.org/legal/epl-2.0/
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//
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// SPDX-License-Identifier: EPL-2.0
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//
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// Contributors:
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// Red Hat, Inc. - initial API and implementation
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//
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package gateway
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import (
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"context"
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"encoding/base64"
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"fmt"
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"io/ioutil"
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"k8s.io/apimachinery/pkg/api/resource"
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"sigs.k8s.io/yaml"
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"github.com/sirupsen/logrus"
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"github.com/eclipse-che/che-operator/pkg/deploy"
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orgv1 "github.com/eclipse-che/che-operator/api/v1"
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"github.com/eclipse-che/che-operator/pkg/util"
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"github.com/google/go-cmp/cmp/cmpopts"
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appsv1 "k8s.io/api/apps/v1"
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corev1 "k8s.io/api/core/v1"
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rbac "k8s.io/api/rbac/v1"
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"k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/util/intstr"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
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"sigs.k8s.io/controller-runtime/pkg/reconcile"
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)
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const (
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// GatewayServiceName is the name of the service which through which the gateway can be accessed
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GatewayServiceName = "che-gateway"
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GatewayServicePort = 8080
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serverComponentName = "server"
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gatewayKubeAuthConfigName = "che-gateway-route-kube-auth"
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gatewayConfigComponentName = "che-gateway-config"
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gatewayOauthSecretName = "che-gateway-oauth-secret"
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GatewayConfigMapNamePrefix = "che-gateway-route-"
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)
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var (
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serviceAccountDiffOpts = cmpopts.IgnoreFields(corev1.ServiceAccount{}, "TypeMeta", "ObjectMeta", "Secrets", "ImagePullSecrets")
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roleDiffOpts = cmpopts.IgnoreFields(rbac.Role{}, "TypeMeta", "ObjectMeta")
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roleBindingDiffOpts = cmpopts.IgnoreFields(rbac.RoleBinding{}, "TypeMeta", "ObjectMeta")
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configMapDiffOpts = cmpopts.IgnoreFields(corev1.ConfigMap{}, "TypeMeta", "ObjectMeta")
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secretDiffOpts = cmpopts.IgnoreFields(corev1.Secret{}, "TypeMeta", "ObjectMeta")
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)
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type GatewayReconciler struct {
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deploy.Reconcilable
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}
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func NewGatewayReconciler() *GatewayReconciler {
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return &GatewayReconciler{}
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}
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func (p *GatewayReconciler) Reconcile(ctx *deploy.DeployContext) (reconcile.Result, bool, error) {
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err := SyncGatewayToCluster(ctx)
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if err != nil {
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return reconcile.Result{}, false, err
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}
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return reconcile.Result{}, true, nil
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}
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func (p *GatewayReconciler) Finalize(ctx *deploy.DeployContext) bool {
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return true
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}
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// SyncGatewayToCluster installs or deletes the gateway based on the custom resource configuration
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func SyncGatewayToCluster(deployContext *deploy.DeployContext) error {
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return syncAll(deployContext)
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}
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func syncAll(deployContext *deploy.DeployContext) error {
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instance := deployContext.CheCluster
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sa := getGatewayServiceAccountSpec(instance)
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if _, err := deploy.Sync(deployContext, &sa, serviceAccountDiffOpts); err != nil {
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return err
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}
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role := getGatewayRoleSpec(instance)
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if _, err := deploy.Sync(deployContext, &role, roleDiffOpts); err != nil {
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return err
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}
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roleBinding := getGatewayRoleBindingSpec(instance)
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if _, err := deploy.Sync(deployContext, &roleBinding, roleBindingDiffOpts); err != nil {
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return err
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}
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if oauthSecret, err := getGatewaySecretSpec(deployContext); err == nil {
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if _, err := deploy.Sync(deployContext, oauthSecret, secretDiffOpts); err != nil {
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return err
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}
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oauthProxyConfig := getGatewayOauthProxyConfigSpec(instance, string(oauthSecret.Data["cookie_secret"]))
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if _, err := deploy.Sync(deployContext, &oauthProxyConfig, configMapDiffOpts); err != nil {
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return err
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}
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} else {
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return err
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}
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kubeRbacProxyConfig := getGatewayKubeRbacProxyConfigSpec(instance)
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if _, err := deploy.Sync(deployContext, &kubeRbacProxyConfig, configMapDiffOpts); err != nil {
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return err
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}
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if util.IsOpenShift {
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if headerRewritePluginConfig, err := getGatewayHeaderRewritePluginConfigSpec(instance); err == nil {
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if _, err := deploy.Sync(deployContext, headerRewritePluginConfig, configMapDiffOpts); err != nil {
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return err
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}
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} else {
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return err
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}
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}
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traefikConfig := getGatewayTraefikConfigSpec(instance)
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if _, err := deploy.Sync(deployContext, &traefikConfig, configMapDiffOpts); err != nil {
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return err
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}
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depl := getGatewayDeploymentSpec(instance)
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if _, err := deploy.Sync(deployContext, &depl, deploy.DefaultDeploymentDiffOpts); err != nil {
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return err
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}
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service := getGatewayServiceSpec(instance)
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if _, err := deploy.Sync(deployContext, &service, deploy.ServiceDefaultDiffOpts); err != nil {
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return err
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}
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if serverConfig, cfgErr := getGatewayServerConfigSpec(deployContext); cfgErr == nil {
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if _, err := deploy.Sync(deployContext, &serverConfig, configMapDiffOpts); err != nil {
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return err
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}
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}
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return nil
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}
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func getGatewaySecretSpec(deployContext *deploy.DeployContext) (*corev1.Secret, error) {
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secret := &corev1.Secret{}
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exists, err := deploy.GetNamespacedObject(deployContext, gatewayOauthSecretName, secret)
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if err == nil && exists {
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if _, ok := secret.Data["cookie_secret"]; !ok {
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logrus.Info("che-gateway-secret found, but does not contain `cookie_secret` value. Regenerating...")
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return generateOauthSecretSpec(deployContext), nil
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}
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return secret, nil
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} else if err == nil && !exists {
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return generateOauthSecretSpec(deployContext), nil
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} else {
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return nil, err
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}
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}
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func generateOauthSecretSpec(deployContext *deploy.DeployContext) *corev1.Secret {
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return &corev1.Secret{
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TypeMeta: metav1.TypeMeta{
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APIVersion: corev1.SchemeGroupVersion.String(),
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Kind: "Secret",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: gatewayOauthSecretName,
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Namespace: deployContext.CheCluster.Namespace,
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Labels: deploy.GetLabels(deployContext.CheCluster, GatewayServiceName),
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},
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Data: map[string][]byte{
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"cookie_secret": generateRandomCookieSecret(),
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},
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}
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}
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func delete(clusterAPI deploy.ClusterAPI, obj metav1.Object) error {
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key := client.ObjectKey{Name: obj.GetName(), Namespace: obj.GetNamespace()}
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ro := obj.(client.Object)
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if getErr := clusterAPI.Client.Get(context.TODO(), key, ro); getErr == nil {
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if err := clusterAPI.Client.Delete(context.TODO(), ro); err != nil {
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if !errors.IsNotFound(err) {
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return err
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}
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}
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}
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return nil
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}
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func DeleteGatewayRouteConfig(componentName string, deployContext *deploy.DeployContext) error {
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obj := &corev1.ConfigMap{
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ObjectMeta: metav1.ObjectMeta{
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Name: GatewayConfigMapNamePrefix + componentName,
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Namespace: deployContext.CheCluster.Namespace,
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},
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}
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return delete(deployContext.ClusterAPI, obj)
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}
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// below functions declare the desired states of the various objects required for the gateway
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func getGatewayServerConfigSpec(deployContext *deploy.DeployContext) (corev1.ConfigMap, error) {
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cfg := CreateCommonTraefikConfig(
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serverComponentName,
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"Path(`/`, `/f`) || PathPrefix(`/api`, `/swagger`, `/_app`)",
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1,
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"http://"+deploy.CheServiceName+":8080",
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[]string{})
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if util.IsOpenShift {
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cfg.AddAuthHeaderRewrite(serverComponentName)
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// native user mode is currently only available on OpenShift but let's be defensive here so that
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// this doesn't break once we enable it on Kubernetes, too. Token check will have to work
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// differently on Kuberentes.
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if util.IsOpenShift {
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cfg.AddOpenShiftTokenCheck(serverComponentName)
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}
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}
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return GetConfigmapForGatewayConfig(deployContext, serverComponentName, cfg)
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}
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func GetConfigmapForGatewayConfig(
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deployContext *deploy.DeployContext,
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componentName string,
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gatewayConfig *TraefikConfig) (corev1.ConfigMap, error) {
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gatewayConfigContent, err := yaml.Marshal(gatewayConfig)
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if err != nil {
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logrus.Error(err, "can't serialize traefik config")
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}
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ret := corev1.ConfigMap{
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TypeMeta: metav1.TypeMeta{
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APIVersion: corev1.SchemeGroupVersion.String(),
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Kind: "ConfigMap",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: GatewayConfigMapNamePrefix + componentName,
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Namespace: deployContext.CheCluster.Namespace,
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Labels: util.MergeMaps(
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deploy.GetLabels(deployContext.CheCluster, gatewayConfigComponentName),
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util.GetMapValue(deployContext.CheCluster.Spec.Server.SingleHostGatewayConfigMapLabels, deploy.DefaultSingleHostGatewayConfigMapLabels)),
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},
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Data: map[string]string{
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componentName + ".yml": string(gatewayConfigContent),
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},
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}
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controllerutil.SetControllerReference(deployContext.CheCluster, &ret, deployContext.ClusterAPI.Scheme)
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return ret, nil
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}
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func getGatewayServiceAccountSpec(instance *orgv1.CheCluster) corev1.ServiceAccount {
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return corev1.ServiceAccount{
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TypeMeta: metav1.TypeMeta{
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APIVersion: corev1.SchemeGroupVersion.String(),
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Kind: "ServiceAccount",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: GatewayServiceName,
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Namespace: instance.Namespace,
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Labels: deploy.GetLabels(instance, GatewayServiceName),
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},
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}
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}
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func getGatewayRoleSpec(instance *orgv1.CheCluster) rbac.Role {
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return rbac.Role{
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TypeMeta: metav1.TypeMeta{
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APIVersion: rbac.SchemeGroupVersion.String(),
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Kind: "Role",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: GatewayServiceName,
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Namespace: instance.Namespace,
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Labels: deploy.GetLabels(instance, GatewayServiceName),
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},
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Rules: []rbac.PolicyRule{
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{
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Verbs: []string{"watch", "get", "list"},
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APIGroups: []string{""},
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Resources: []string{"configmaps"},
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},
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},
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}
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}
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func getGatewayRoleBindingSpec(instance *orgv1.CheCluster) rbac.RoleBinding {
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return rbac.RoleBinding{
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TypeMeta: metav1.TypeMeta{
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APIVersion: rbac.SchemeGroupVersion.String(),
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Kind: "RoleBinding",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: GatewayServiceName,
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Namespace: instance.Namespace,
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Labels: deploy.GetLabels(instance, GatewayServiceName),
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},
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RoleRef: rbac.RoleRef{
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APIGroup: "rbac.authorization.k8s.io",
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Kind: "Role",
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Name: GatewayServiceName,
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},
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Subjects: []rbac.Subject{
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{
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Kind: "ServiceAccount",
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Name: GatewayServiceName,
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},
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},
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}
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}
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func generateRandomCookieSecret() []byte {
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return []byte(base64.StdEncoding.EncodeToString([]byte(util.GeneratePasswd(16))))
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}
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func getGatewayHeaderRewritePluginConfigSpec(instance *orgv1.CheCluster) (*corev1.ConfigMap, error) {
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headerRewrite, err := ioutil.ReadFile("/tmp/header-rewrite-traefik-plugin/headerRewrite.go")
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if err != nil {
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if !util.IsTestMode() {
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return nil, err
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}
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}
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pluginMeta, err := ioutil.ReadFile("/tmp/header-rewrite-traefik-plugin/.traefik.yml")
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if err != nil {
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if !util.IsTestMode() {
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return nil, err
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}
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}
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return &corev1.ConfigMap{
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TypeMeta: metav1.TypeMeta{
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APIVersion: corev1.SchemeGroupVersion.String(),
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Kind: "ConfigMap",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "che-gateway-config-header-rewrite-traefik-plugin",
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Namespace: instance.Namespace,
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Labels: deploy.GetLabels(instance, GatewayServiceName),
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},
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Data: map[string]string{
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"headerRewrite.go": string(headerRewrite),
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".traefik.yml": string(pluginMeta),
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},
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}, nil
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}
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func getGatewayTraefikConfigSpec(instance *orgv1.CheCluster) corev1.ConfigMap {
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traefikPort := 8081
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data := fmt.Sprintf(`
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entrypoints:
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http:
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address: ":%d"
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forwardedHeaders:
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insecure: true
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sink:
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address: ":8090"
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ping:
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entryPoint: "sink"
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global:
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checkNewVersion: false
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sendAnonymousUsage: false
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providers:
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file:
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directory: "/dynamic-config"
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watch: true
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log:
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level: "INFO"`, traefikPort)
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if util.IsOpenShift {
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data += `
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experimental:
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localPlugins:
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header-rewrite:
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moduleName: github.com/che-incubator/header-rewrite-traefik-plugin`
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}
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return corev1.ConfigMap{
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TypeMeta: metav1.TypeMeta{
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APIVersion: corev1.SchemeGroupVersion.String(),
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Kind: "ConfigMap",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "che-gateway-config",
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Namespace: instance.Namespace,
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Labels: deploy.GetLabels(instance, GatewayServiceName),
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},
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Data: map[string]string{
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"traefik.yml": data,
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},
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}
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}
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func getGatewayDeploymentSpec(instance *orgv1.CheCluster) appsv1.Deployment {
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terminationGracePeriodSeconds := int64(10)
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deployLabels, labelsSelector := deploy.GetLabelsAndSelector(instance, GatewayServiceName)
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return appsv1.Deployment{
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TypeMeta: metav1.TypeMeta{
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APIVersion: appsv1.SchemeGroupVersion.String(),
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Kind: "Deployment",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: GatewayServiceName,
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Namespace: instance.Namespace,
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Labels: deployLabels,
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},
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Spec: appsv1.DeploymentSpec{
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Selector: &metav1.LabelSelector{
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MatchLabels: labelsSelector,
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},
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Strategy: appsv1.DeploymentStrategy{
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Type: appsv1.RollingUpdateDeploymentStrategyType,
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},
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Template: corev1.PodTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Labels: deployLabels,
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},
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Spec: corev1.PodSpec{
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TerminationGracePeriodSeconds: &terminationGracePeriodSeconds,
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ServiceAccountName: GatewayServiceName,
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RestartPolicy: corev1.RestartPolicyAlways,
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Containers: getContainersSpec(instance),
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Volumes: getVolumesSpec(instance),
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},
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},
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},
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}
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}
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func getContainersSpec(instance *orgv1.CheCluster) []corev1.Container {
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configLabelsMap := util.GetMapValue(instance.Spec.Server.SingleHostGatewayConfigMapLabels, deploy.DefaultSingleHostGatewayConfigMapLabels)
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gatewayImage := util.GetValue(instance.Spec.Server.SingleHostGatewayImage, deploy.DefaultSingleHostGatewayImage(instance))
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configSidecarImage := util.GetValue(instance.Spec.Server.SingleHostGatewayConfigSidecarImage, deploy.DefaultSingleHostGatewayConfigSidecarImage(instance))
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configLabels := labels.FormatLabels(configLabelsMap)
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containers := []corev1.Container{
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{
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Name: "gateway",
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Image: gatewayImage,
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ImagePullPolicy: corev1.PullAlways,
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VolumeMounts: getTraefikContainerVolumeMounts(instance),
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Resources: corev1.ResourceRequirements{
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Limits: corev1.ResourceList{
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corev1.ResourceMemory: resource.MustParse("4Gi"),
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corev1.ResourceCPU: resource.MustParse("1"),
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},
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Requests: corev1.ResourceList{
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corev1.ResourceMemory: resource.MustParse("128Mi"),
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corev1.ResourceCPU: resource.MustParse("0.1"),
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},
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},
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},
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{
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Name: "configbump",
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Image: configSidecarImage,
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ImagePullPolicy: corev1.PullAlways,
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Resources: corev1.ResourceRequirements{
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Limits: corev1.ResourceList{
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corev1.ResourceMemory: resource.MustParse("256Mi"),
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corev1.ResourceCPU: resource.MustParse("0.5"),
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},
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Requests: corev1.ResourceList{
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corev1.ResourceMemory: resource.MustParse("64Mi"),
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corev1.ResourceCPU: resource.MustParse("0.05"),
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},
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},
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VolumeMounts: []corev1.VolumeMount{
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{
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Name: "dynamic-config",
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MountPath: "/dynamic-config",
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},
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},
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Env: []corev1.EnvVar{
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{
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Name: "CONFIG_BUMP_DIR",
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Value: "/dynamic-config",
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},
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{
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Name: "CONFIG_BUMP_LABELS",
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Value: configLabels,
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},
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{
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Name: "CONFIG_BUMP_NAMESPACE",
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ValueFrom: &corev1.EnvVarSource{
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FieldRef: &corev1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "metadata.namespace",
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},
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},
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},
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},
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},
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}
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containers = append(containers,
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getOauthProxyContainerSpec(instance),
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getKubeRbacProxyContainerSpec(instance))
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|
|
return containers
|
|
}
|
|
|
|
func getTraefikContainerVolumeMounts(instance *orgv1.CheCluster) []corev1.VolumeMount {
|
|
mounts := []corev1.VolumeMount{
|
|
{
|
|
Name: "static-config",
|
|
MountPath: "/etc/traefik",
|
|
},
|
|
{
|
|
Name: "dynamic-config",
|
|
MountPath: "/dynamic-config",
|
|
},
|
|
}
|
|
if util.IsOpenShift {
|
|
mounts = append(mounts, corev1.VolumeMount{
|
|
Name: "header-rewrite-traefik-plugin",
|
|
MountPath: "/plugins-local/src/github.com/che-incubator/header-rewrite-traefik-plugin",
|
|
})
|
|
}
|
|
|
|
return mounts
|
|
}
|
|
|
|
func getVolumesSpec(instance *orgv1.CheCluster) []corev1.Volume {
|
|
volumes := []corev1.Volume{
|
|
{
|
|
Name: "static-config",
|
|
VolumeSource: corev1.VolumeSource{
|
|
ConfigMap: &corev1.ConfigMapVolumeSource{
|
|
LocalObjectReference: corev1.LocalObjectReference{
|
|
Name: "che-gateway-config",
|
|
},
|
|
},
|
|
},
|
|
},
|
|
{
|
|
Name: "dynamic-config",
|
|
VolumeSource: corev1.VolumeSource{
|
|
EmptyDir: &corev1.EmptyDirVolumeSource{},
|
|
},
|
|
},
|
|
}
|
|
|
|
volumes = append(volumes,
|
|
getOauthProxyConfigVolume(),
|
|
getKubeRbacProxyConfigVolume())
|
|
|
|
if util.IsOpenShift {
|
|
volumes = append(volumes, corev1.Volume{
|
|
Name: "header-rewrite-traefik-plugin",
|
|
VolumeSource: corev1.VolumeSource{
|
|
ConfigMap: &corev1.ConfigMapVolumeSource{
|
|
LocalObjectReference: corev1.LocalObjectReference{
|
|
Name: "che-gateway-config-header-rewrite-traefik-plugin",
|
|
},
|
|
},
|
|
},
|
|
})
|
|
}
|
|
|
|
return volumes
|
|
}
|
|
|
|
func getGatewayServiceSpec(instance *orgv1.CheCluster) corev1.Service {
|
|
return corev1.Service{
|
|
TypeMeta: metav1.TypeMeta{
|
|
APIVersion: corev1.SchemeGroupVersion.String(),
|
|
Kind: "Service",
|
|
},
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: GatewayServiceName,
|
|
Namespace: instance.Namespace,
|
|
Labels: deploy.GetLabels(instance, GatewayServiceName),
|
|
},
|
|
Spec: corev1.ServiceSpec{
|
|
Selector: deploy.GetLabels(instance, GatewayServiceName),
|
|
SessionAffinity: corev1.ServiceAffinityNone,
|
|
Type: corev1.ServiceTypeClusterIP,
|
|
Ports: []corev1.ServicePort{
|
|
{
|
|
Name: "gateway-http",
|
|
Port: GatewayServicePort,
|
|
Protocol: corev1.ProtocolTCP,
|
|
TargetPort: intstr.FromInt(GatewayServicePort),
|
|
},
|
|
{
|
|
Name: "gateway-kube-authz",
|
|
Port: 8089,
|
|
Protocol: corev1.ProtocolTCP,
|
|
TargetPort: intstr.FromInt(8089),
|
|
},
|
|
},
|
|
},
|
|
}
|
|
}
|