smruthi2187andGitHub
8984e4916e
This feature allows creation of fission objects in different namespaces, in addition to retaining the existing behavior of creating fission objects in default namespace if user doesnt provide one. It also removes cluster admin roles for fission-fetcher and fission-builder Service Accounts and grants them only those privileges that they need.
637 lines
18 KiB
Go
637 lines
18 KiB
Go
/*
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Copyright 2017 The Fission Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package buildermgr
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import (
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"fmt"
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"log"
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"os"
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"strconv"
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"time"
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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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"k8s.io/apimachinery/pkg/watch"
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"k8s.io/client-go/kubernetes"
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apiv1 "k8s.io/client-go/pkg/api/v1"
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"k8s.io/client-go/pkg/apis/extensions/v1beta1"
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"github.com/fission/fission"
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"github.com/fission/fission/crd"
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)
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type requestType int
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const (
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GET_BUILDER requestType = iota
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CLEANUP_BUILDERS
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LABEL_ENV_NAME = "envName"
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LABEL_ENV_NAMESPACE = "envNamespace"
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LABEL_ENV_RESOURCEVERSION = "envResourceVersion"
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LABEL_DEPLOYMENT_OWNER = "owner"
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BUILDER_MGR = "buildermgr"
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)
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var (
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deletePropagation = metav1.DeletePropagationBackground
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delOpt = metav1.DeleteOptions{PropagationPolicy: &deletePropagation}
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)
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type (
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builderInfo struct {
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envMetadata *metav1.ObjectMeta
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deployment *v1beta1.Deployment
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service *apiv1.Service
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}
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envwRequest struct {
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requestType
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env *crd.Environment
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envList []crd.Environment
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respChan chan envwResponse
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}
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envwResponse struct {
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builderInfo *builderInfo
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err error
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}
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environmentWatcher struct {
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cache map[string]*builderInfo
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requestChan chan envwRequest
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builderNamespace string
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fissionClient *crd.FissionClient
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kubernetesClient *kubernetes.Clientset
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fetcherImage string
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fetcherImagePullPolicy apiv1.PullPolicy
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useIstio bool
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}
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)
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func makeEnvironmentWatcher(fissionClient *crd.FissionClient,
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kubernetesClient *kubernetes.Clientset, builderNamespace string) *environmentWatcher {
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useIstio := false
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enableIstio := os.Getenv("ENABLE_ISTIO")
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if len(enableIstio) > 0 {
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istio, err := strconv.ParseBool(enableIstio)
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if err != nil {
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log.Println("Failed to parse ENABLE_ISTIO, defaults to false")
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}
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useIstio = istio
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}
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fetcherImage := os.Getenv("FETCHER_IMAGE")
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if len(fetcherImage) == 0 {
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fetcherImage = "fission/fetcher"
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}
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fetcherImagePullPolicy := os.Getenv("FETCHER_IMAGE_PULL_POLICY")
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if len(fetcherImagePullPolicy) == 0 {
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fetcherImagePullPolicy = "IfNotPresent"
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}
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var pullPolicy apiv1.PullPolicy
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switch fetcherImagePullPolicy {
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case "Always":
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pullPolicy = apiv1.PullAlways
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case "Never":
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pullPolicy = apiv1.PullNever
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default:
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pullPolicy = apiv1.PullIfNotPresent
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}
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envWatcher := &environmentWatcher{
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cache: make(map[string]*builderInfo),
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requestChan: make(chan envwRequest),
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builderNamespace: builderNamespace,
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fissionClient: fissionClient,
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kubernetesClient: kubernetesClient,
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fetcherImage: fetcherImage,
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fetcherImagePullPolicy: pullPolicy,
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useIstio: useIstio,
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}
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go envWatcher.service()
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return envWatcher
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}
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func (envw *environmentWatcher) getCacheKey(envName string, envNamespace string, envResourceVersion string) string {
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return fmt.Sprintf("%v-%v-%v", envName, envNamespace, envResourceVersion)
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}
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func (env *environmentWatcher) getLabelForDeploymentOwner() map[string]string {
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return map[string]string{
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LABEL_DEPLOYMENT_OWNER: BUILDER_MGR,
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}
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}
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func (envw *environmentWatcher) getLabels(envName string, envNamespace string, envResourceVersion string) map[string]string {
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return map[string]string{
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LABEL_ENV_NAME: envName,
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LABEL_ENV_NAMESPACE: envNamespace,
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LABEL_ENV_RESOURCEVERSION: envResourceVersion,
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LABEL_DEPLOYMENT_OWNER: BUILDER_MGR,
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}
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}
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func (envw *environmentWatcher) watchEnvironments() {
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rv := ""
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for {
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wi, err := envw.fissionClient.Environments(metav1.NamespaceAll).Watch(metav1.ListOptions{
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ResourceVersion: rv,
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})
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if err != nil {
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if fission.IsNetworkError(err) {
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log.Printf("Encounter network error, retrying later: %v", err)
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time.Sleep(5 * time.Second)
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continue
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}
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log.Fatalf("Error watching environment list: %v", err)
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}
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for {
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ev, more := <-wi.ResultChan()
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if !more {
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// restart watch from last rv
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break
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}
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if ev.Type == watch.Error {
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// restart watch from the start
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rv = ""
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time.Sleep(time.Second)
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break
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}
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env := ev.Object.(*crd.Environment)
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rv = env.Metadata.ResourceVersion
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envw.sync()
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}
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}
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}
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func (envw *environmentWatcher) sync() {
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maxRetries := 10
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for i := 0; i < maxRetries; i++ {
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envList, err := envw.fissionClient.Environments(metav1.NamespaceAll).List(metav1.ListOptions{})
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if err != nil {
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if fission.IsNetworkError(err) {
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log.Printf("Error syncing environment CRD resources due to network error, retrying later: %v", err)
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time.Sleep(50 * time.Duration(2*i) * time.Millisecond)
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continue
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}
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log.Fatalf("Error syncing environment CRD resources: %v", err)
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}
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// Create environment builders for all environments
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for i := range envList.Items {
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env := envList.Items[i]
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if env.Spec.Version == 1 || // builder is not supported with v1 interface
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len(env.Spec.Builder.Image) == 0 { // ignore env without builder image
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continue
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}
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_, err := envw.getEnvBuilder(&env)
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if err != nil {
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log.Printf("Error creating builder for %v: %v", env.Metadata.Name, err)
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}
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}
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// Remove environment builders no longer needed
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envw.cleanupEnvBuilders(envList.Items)
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break
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}
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}
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func (envw *environmentWatcher) service() {
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for {
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req := <-envw.requestChan
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switch req.requestType {
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case GET_BUILDER:
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// In order to support backward compatibility, for all environments with builder image created in default env,
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// the pods will be created in fission-builder namespace
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ns := envw.builderNamespace
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if req.env.Metadata.Namespace != metav1.NamespaceDefault {
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ns = req.env.Metadata.Namespace
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}
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key := envw.getCacheKey(req.env.Metadata.Name, ns, req.env.Metadata.ResourceVersion)
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builderInfo, ok := envw.cache[key]
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if !ok {
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builderInfo, err := envw.createBuilder(req.env, ns)
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if err != nil {
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req.respChan <- envwResponse{err: err}
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continue
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}
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envw.cache[key] = builderInfo
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}
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req.respChan <- envwResponse{builderInfo: builderInfo}
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case CLEANUP_BUILDERS:
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latestEnvList := make(map[string]*crd.Environment)
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for i := range req.envList {
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env := req.envList[i]
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// In order to support backward compatibility, for all builder images created in default
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// env, the pods are created in fission-builder namespace
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ns := envw.builderNamespace
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if env.Metadata.Namespace != metav1.NamespaceDefault {
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ns = env.Metadata.Namespace
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}
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key := envw.getCacheKey(env.Metadata.Name, ns, env.Metadata.ResourceVersion)
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latestEnvList[key] = &env
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}
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// If an environment is deleted when builder manager down,
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// the builder belongs to the environment will be out-of-
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// control (an orphan builder) since there is no record in
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// cache and CRD. We need to iterate over the services &
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// deployments to remove both normal and orphan builders.
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svcList, err := envw.getBuilderServiceList(envw.getLabelForDeploymentOwner(), metav1.NamespaceAll)
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if err != nil {
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log.Println(err.Error())
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}
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for _, svc := range svcList {
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envName := svc.ObjectMeta.Labels[LABEL_ENV_NAME]
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envNamespace := svc.ObjectMeta.Labels[LABEL_ENV_NAMESPACE]
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envResourceVersion := svc.ObjectMeta.Labels[LABEL_ENV_RESOURCEVERSION]
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key := envw.getCacheKey(envName, envNamespace, envResourceVersion)
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if _, ok := latestEnvList[key]; !ok {
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err := envw.deleteBuilderServiceByName(svc.ObjectMeta.Name, svc.ObjectMeta.Namespace)
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if err != nil {
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log.Printf("Error removing builder service: %v", err)
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}
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}
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delete(envw.cache, key)
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}
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deployList, err := envw.getBuilderDeploymentList(envw.getLabelForDeploymentOwner(), metav1.NamespaceAll)
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if err != nil {
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log.Printf(err.Error())
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}
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for _, deploy := range deployList {
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envName := deploy.ObjectMeta.Labels[LABEL_ENV_NAME]
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envNamespace := deploy.ObjectMeta.Labels[LABEL_ENV_NAMESPACE]
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envResourceVersion := deploy.ObjectMeta.Labels[LABEL_ENV_RESOURCEVERSION]
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key := envw.getCacheKey(envName, envNamespace, envResourceVersion)
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if _, ok := latestEnvList[key]; !ok {
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err := envw.deleteBuilderDeploymentByName(deploy.ObjectMeta.Name, deploy.ObjectMeta.Namespace)
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if err != nil {
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log.Printf("Error removing builder deployment: %v", err)
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}
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}
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delete(envw.cache, key)
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}
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}
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}
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}
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func (envw *environmentWatcher) getEnvBuilder(env *crd.Environment) (*builderInfo, error) {
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respChan := make(chan envwResponse)
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envw.requestChan <- envwRequest{
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requestType: GET_BUILDER,
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env: env,
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respChan: respChan,
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}
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resp := <-respChan
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return resp.builderInfo, resp.err
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}
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func (envw *environmentWatcher) cleanupEnvBuilders(envs []crd.Environment) {
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envw.requestChan <- envwRequest{
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requestType: CLEANUP_BUILDERS,
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envList: envs,
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}
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}
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func (envw *environmentWatcher) createBuilder(env *crd.Environment, ns string) (*builderInfo, error) {
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var svc *apiv1.Service
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var deploy *v1beta1.Deployment
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sel := envw.getLabels(env.Metadata.Name, ns, env.Metadata.ResourceVersion)
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svcList, err := envw.getBuilderServiceList(sel, ns)
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if err != nil {
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return nil, err
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}
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// there should be only one service in svcList
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if len(svcList) == 0 {
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svc, err = envw.createBuilderService(env, ns)
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if err != nil {
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return nil, fmt.Errorf("Error creating builder service: %v", err)
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}
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} else if len(svcList) == 1 {
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svc = &svcList[0]
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} else {
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return nil, fmt.Errorf("Found more than one builder service for environment %v", env.Metadata.Name)
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}
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deployList, err := envw.getBuilderDeploymentList(sel, ns)
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if err != nil {
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return nil, err
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}
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// there should be only one deploy in deployList
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if len(deployList) == 0 {
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// create builder SA in this ns, if not already created
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_, err := fission.SetupSA(envw.kubernetesClient, fission.FissionBuilderSA, ns)
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if err != nil {
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log.Printf("Error : %v creating %s in ns : %s", err, fission.FissionBuilderSA, ns)
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return nil, err
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}
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deploy, err = envw.createBuilderDeployment(env, ns)
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if err != nil {
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return nil, fmt.Errorf("Error creating builder deployment: %v", err)
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}
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} else if len(deployList) == 1 {
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deploy = &deployList[0]
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} else {
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return nil, fmt.Errorf("Found more than one builder deployment for environment %v", env.Metadata.Name)
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}
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return &builderInfo{
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envMetadata: &env.Metadata,
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service: svc,
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deployment: deploy,
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}, nil
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}
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func (envw *environmentWatcher) deleteBuilderServiceByName(name, namespace string) error {
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falseVal := false
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delOpt := &metav1.DeleteOptions{
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OrphanDependents: &falseVal,
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}
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err := envw.kubernetesClient.
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Services(namespace).
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Delete(name, delOpt)
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if err != nil {
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return fmt.Errorf("Error deleting builder service %s.%s: %v", name, namespace, err)
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}
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return nil
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}
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func (envw *environmentWatcher) deleteBuilderDeploymentByName(name, namespace string) error {
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falseVal := false
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delOpt := &metav1.DeleteOptions{
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OrphanDependents: &falseVal,
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}
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err := envw.kubernetesClient.ExtensionsV1beta1().
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Deployments(namespace).
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Delete(name, delOpt)
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if err != nil {
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return fmt.Errorf("Error deleting builder deployment %s.%s: %v", name, namespace, err)
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}
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return nil
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}
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func (envw *environmentWatcher) deleteBuilderService(sel map[string]string, ns string) error {
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svcList, err := envw.getBuilderServiceList(sel, ns)
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if err != nil {
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return err
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}
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for _, svc := range svcList {
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log.Printf("Removing builder service: %v", svc.ObjectMeta.Name)
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err = envw.kubernetesClient.
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Services(ns).
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Delete(svc.ObjectMeta.Name, &delOpt)
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if err != nil {
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return fmt.Errorf("Error deleting builder service: %v", err)
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}
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}
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return nil
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}
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func (envw *environmentWatcher) deleteBuilderDeployment(sel map[string]string, ns string) error {
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deployList, err := envw.getBuilderDeploymentList(sel, ns)
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if err != nil {
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return err
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}
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for _, deploy := range deployList {
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log.Printf("Removing builder deployment: %v", deploy.ObjectMeta.Name)
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err = envw.kubernetesClient.ExtensionsV1beta1().
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Deployments(ns).
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Delete(deploy.ObjectMeta.Name, &delOpt)
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if err != nil {
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return fmt.Errorf("Error deleteing builder deployment: %v", err)
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}
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}
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return nil
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}
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func (envw *environmentWatcher) getBuilderServiceList(sel map[string]string, ns string) ([]apiv1.Service, error) {
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svcList, err := envw.kubernetesClient.Services(ns).List(
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metav1.ListOptions{
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LabelSelector: labels.Set(sel).AsSelector().String(),
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})
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if err != nil {
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return nil, fmt.Errorf("Error getting builder service list: %v", err)
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}
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return svcList.Items, nil
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}
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func (envw *environmentWatcher) createBuilderService(env *crd.Environment, ns string) (*apiv1.Service, error) {
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name := fmt.Sprintf("%v-%v", env.Metadata.Name, env.Metadata.ResourceVersion)
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sel := envw.getLabels(env.Metadata.Name, ns, env.Metadata.ResourceVersion)
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service := apiv1.Service{
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ObjectMeta: metav1.ObjectMeta{
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Namespace: ns,
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Name: name,
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Labels: sel,
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},
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Spec: apiv1.ServiceSpec{
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Selector: sel,
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Type: apiv1.ServiceTypeClusterIP,
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Ports: []apiv1.ServicePort{
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{
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Name: "fetcher-port",
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Protocol: apiv1.ProtocolTCP,
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Port: 8000,
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TargetPort: intstr.IntOrString{
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Type: intstr.Int,
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IntVal: 8000,
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},
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},
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{
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Name: "builder-port",
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Protocol: apiv1.ProtocolTCP,
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Port: 8001,
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TargetPort: intstr.IntOrString{
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Type: intstr.Int,
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IntVal: 8001,
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},
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},
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},
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},
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}
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log.Printf("Creating builder service: %v", name)
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_, err := envw.kubernetesClient.Services(ns).Create(&service)
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if err != nil {
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return nil, err
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}
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return &service, nil
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}
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func (envw *environmentWatcher) getBuilderDeploymentList(sel map[string]string, ns string) ([]v1beta1.Deployment, error) {
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deployList, err := envw.kubernetesClient.ExtensionsV1beta1().Deployments(ns).List(
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metav1.ListOptions{
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LabelSelector: labels.Set(sel).AsSelector().String(),
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})
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if err != nil {
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return nil, fmt.Errorf("Error getting builder deployment list: %v", err)
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}
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return deployList.Items, nil
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}
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func (envw *environmentWatcher) createBuilderDeployment(env *crd.Environment, ns string) (*v1beta1.Deployment, error) {
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sharedMountPath := "/packages"
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sharedCfgMapPath := "/configs"
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sharedSecretPath := "/secrets"
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name := fmt.Sprintf("%v-%v", env.Metadata.Name, env.Metadata.ResourceVersion)
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sel := envw.getLabels(env.Metadata.Name, ns, env.Metadata.ResourceVersion)
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var replicas int32 = 1
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podAnnotation := make(map[string]string)
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if envw.useIstio && env.Spec.AllowAccessToExternalNetwork {
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podAnnotation["sidecar.istio.io/inject"] = "false"
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}
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|
|
deployment := &v1beta1.Deployment{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Namespace: ns,
|
|
Name: name,
|
|
Labels: sel,
|
|
},
|
|
Spec: v1beta1.DeploymentSpec{
|
|
Replicas: &replicas,
|
|
Selector: &metav1.LabelSelector{
|
|
MatchLabels: sel,
|
|
},
|
|
Template: apiv1.PodTemplateSpec{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Labels: sel,
|
|
Annotations: podAnnotation,
|
|
},
|
|
Spec: apiv1.PodSpec{
|
|
Volumes: []apiv1.Volume{
|
|
{
|
|
Name: fission.SharedVolumePackages,
|
|
VolumeSource: apiv1.VolumeSource{
|
|
EmptyDir: &apiv1.EmptyDirVolumeSource{},
|
|
},
|
|
},
|
|
{
|
|
Name: fission.SharedVolumeSecrets,
|
|
VolumeSource: apiv1.VolumeSource{
|
|
EmptyDir: &apiv1.EmptyDirVolumeSource{},
|
|
},
|
|
},
|
|
{
|
|
Name: fission.SharedVolumeConfigmaps,
|
|
VolumeSource: apiv1.VolumeSource{
|
|
EmptyDir: &apiv1.EmptyDirVolumeSource{},
|
|
},
|
|
},
|
|
},
|
|
Containers: []apiv1.Container{
|
|
fission.MergeContainerSpecs(&apiv1.Container{
|
|
Name: "builder",
|
|
Image: env.Spec.Builder.Image,
|
|
ImagePullPolicy: apiv1.PullAlways,
|
|
TerminationMessagePath: "/dev/termination-log",
|
|
VolumeMounts: []apiv1.VolumeMount{
|
|
{
|
|
Name: fission.SharedVolumePackages,
|
|
MountPath: sharedMountPath,
|
|
},
|
|
{
|
|
Name: fission.SharedVolumeSecrets,
|
|
MountPath: sharedSecretPath,
|
|
},
|
|
{
|
|
Name: fission.SharedVolumeConfigmaps,
|
|
MountPath: sharedCfgMapPath,
|
|
},
|
|
},
|
|
Command: []string{"/builder", sharedMountPath},
|
|
ReadinessProbe: &apiv1.Probe{
|
|
InitialDelaySeconds: 5,
|
|
PeriodSeconds: 2,
|
|
Handler: apiv1.Handler{
|
|
HTTPGet: &apiv1.HTTPGetAction{
|
|
Path: "/healthz",
|
|
Port: intstr.IntOrString{
|
|
Type: intstr.Int,
|
|
IntVal: 8001,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}, env.Spec.Builder.Container),
|
|
{
|
|
Name: "fetcher",
|
|
Image: envw.fetcherImage,
|
|
ImagePullPolicy: envw.fetcherImagePullPolicy,
|
|
TerminationMessagePath: "/dev/termination-log",
|
|
VolumeMounts: []apiv1.VolumeMount{
|
|
{
|
|
Name: fission.SharedVolumePackages,
|
|
MountPath: sharedMountPath,
|
|
},
|
|
{
|
|
Name: fission.SharedVolumeSecrets,
|
|
MountPath: sharedSecretPath,
|
|
},
|
|
{
|
|
Name: fission.SharedVolumeConfigmaps,
|
|
MountPath: sharedCfgMapPath,
|
|
},
|
|
},
|
|
Command: []string{"/fetcher",
|
|
"-secret-dir", sharedSecretPath,
|
|
"-cfgmap-dir", sharedCfgMapPath,
|
|
sharedMountPath},
|
|
ReadinessProbe: &apiv1.Probe{
|
|
InitialDelaySeconds: 5,
|
|
PeriodSeconds: 2,
|
|
Handler: apiv1.Handler{
|
|
HTTPGet: &apiv1.HTTPGetAction{
|
|
Path: "/healthz",
|
|
Port: intstr.IntOrString{
|
|
Type: intstr.Int,
|
|
IntVal: 8000,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
ServiceAccountName: "fission-builder",
|
|
},
|
|
},
|
|
},
|
|
}
|
|
log.Printf("Creating builder deployment: %v", fmt.Sprintf("%v-%v", env.Metadata.Name, env.Metadata.ResourceVersion))
|
|
_, err := envw.kubernetesClient.ExtensionsV1beta1().Deployments(ns).Create(deployment)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return deployment, nil
|
|
}
|