mirror of https://github.com/fluxcd/flux2.git
Merge pull request #8 from fluxcd/create-kustomization
Implement create kustomization commandpull/9/head
Stefan Prodan
5 years ago
committed by
GitHub
commit
1d7b8cd54f
@ -0,0 +1,240 @@
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package main
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import (
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"context"
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"fmt"
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kustomizev1 "github.com/fluxcd/kustomize-controller/api/v1alpha1"
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"strings"
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"time"
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sourcev1 "github.com/fluxcd/source-controller/api/v1alpha1"
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"github.com/spf13/cobra"
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corev1 "k8s.io/api/core/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/types"
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"k8s.io/apimachinery/pkg/util/wait"
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"sigs.k8s.io/controller-runtime/pkg/client"
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)
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var createKsCmd = &cobra.Command{
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Use: "kustomization [name]",
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Short: "Create or update a kustomization resource",
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Long: `
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The kustomization source command generates a kustomization.kustomize.fluxcd.io resource for a given GitRepository source.
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API spec: https://github.com/fluxcd/kustomize-controller/tree/master/docs/spec/v1alpha1`,
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Example: ` # Create a kustomization from a source at a given path
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create kustomization backend \
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--source=webapp \
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--path="./overlays/backend/" \
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--prune="app=backend" \
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--interval=10m \
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--validate=client \
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--health-check="StatefulSet/backend.test" \
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--health-check-timeout=3m
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# Create a kustomization that depends on another
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create kustomization frontend \
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--depends-on=backend \
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--source=webapp \
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--path="./overlays/frontend/" \
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--prune="app=frontend" \
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--interval=5m \
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--validate=client \
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--health-check="Deployment/frontend.test" \
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--health-check-timeout=2m
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`,
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RunE: createKsCmdRun,
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}
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var (
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ksSource string
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ksPath string
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ksPrune string
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ksDependsOn []string
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ksValidate string
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ksHealthCheck []string
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ksHealthTimeout time.Duration
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ksGenerate bool
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)
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func init() {
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createKsCmd.Flags().StringVar(&ksSource, "source", "", "GitRepository name")
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createKsCmd.Flags().StringVar(&ksPath, "path", "./", "path to the directory containing the kustomization file")
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createKsCmd.Flags().StringVar(&ksPrune, "prune", "", "label selector used for garbage collection")
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createKsCmd.Flags().StringArrayVar(&ksHealthCheck, "health-check", nil, "workload to be included in the health assessment, in the format '<kind>/<name>.<namespace>'")
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createKsCmd.Flags().DurationVar(&ksHealthTimeout, "health-check-timeout", 2*time.Minute, "timeout of health checking operations")
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createKsCmd.Flags().StringVar(&ksValidate, "validate", "", "validate the manifests before applying them on the cluster, can be 'client' or 'server'")
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createKsCmd.Flags().BoolVar(&ksGenerate, "generate", false, "generate the kustomization.yaml for all the Kubernetes manifests in the specified path and sub-directories")
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createKsCmd.Flags().StringArrayVar(&ksDependsOn, "depends-on", nil, "kustomization that must be ready before this kustomization can be applied")
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createCmd.AddCommand(createKsCmd)
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}
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func createKsCmdRun(cmd *cobra.Command, args []string) error {
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if len(args) < 1 {
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return fmt.Errorf("kustomization name is required")
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}
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name := args[0]
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if ksSource == "" {
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return fmt.Errorf("source is required")
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}
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if ksPath == "" {
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return fmt.Errorf("path is required")
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}
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if !strings.HasPrefix(ksPath, "./") {
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return fmt.Errorf("path must begin with ./")
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}
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel()
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kubeClient, err := utils.kubeClient(kubeconfig)
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if err != nil {
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return err
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}
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logAction("generating %s kustomization", name)
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emptyAPIGroup := ""
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kustomization := kustomizev1.Kustomization{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Namespace: namespace,
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},
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Spec: kustomizev1.KustomizationSpec{
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DependsOn: ksDependsOn,
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Generate: ksGenerate,
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Interval: metav1.Duration{
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Duration: interval,
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},
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Path: ksPath,
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Prune: ksPrune,
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SourceRef: corev1.TypedLocalObjectReference{
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APIGroup: &emptyAPIGroup,
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Kind: "GitRepository",
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Name: ksSource,
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},
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Suspend: false,
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Validation: ksValidate,
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},
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}
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if len(ksHealthCheck) > 0 {
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healthChecks := make([]kustomizev1.WorkloadReference, 0)
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for _, w := range ksHealthCheck {
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kindObj := strings.Split(w, "/")
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if len(kindObj) != 2 {
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return fmt.Errorf("invalid health check '%s' must be in the format 'kind/name.namespace' %v", w, kindObj)
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}
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kind := kindObj[0]
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kinds := map[string]bool{
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"Deployment": true,
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"DaemonSet": true,
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"StatefulSet": true,
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}
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if !kinds[kind] {
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return fmt.Errorf("invalid health check kind '%s' can be Deployment, DaemonSet or StatefulSet", kind)
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}
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nameNs := strings.Split(kindObj[1], ".")
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if len(nameNs) != 2 {
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return fmt.Errorf("invalid health check '%s' must be in the format 'kind/name.namespace'", w)
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}
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healthChecks = append(healthChecks, kustomizev1.WorkloadReference{
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Kind: kind,
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Name: nameNs[0],
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Namespace: nameNs[1],
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})
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}
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kustomization.Spec.HealthChecks = healthChecks
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kustomization.Spec.Timeout = &metav1.Duration{
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Duration: ksHealthTimeout,
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}
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}
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if err := upsertKustomization(ctx, kubeClient, kustomization); err != nil {
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return err
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}
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logAction("waiting for kustomization sync")
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if err := wait.PollImmediate(2*time.Second, timeout,
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isKustomizationReady(ctx, kubeClient, name, namespace)); err != nil {
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return err
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}
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logSuccess("kustomization %s is ready", name)
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namespacedName := types.NamespacedName{
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Namespace: namespace,
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Name: name,
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}
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err = kubeClient.Get(ctx, namespacedName, &kustomization)
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if err != nil {
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return fmt.Errorf("kustomization sync failed: %w", err)
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}
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if kustomization.Status.LastAppliedRevision != "" {
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logSuccess("applied revision %s", kustomization.Status.LastAppliedRevision)
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} else {
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return fmt.Errorf("kustomization sync failed")
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}
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return nil
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}
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func upsertKustomization(ctx context.Context, kubeClient client.Client, kustomization kustomizev1.Kustomization) error {
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namespacedName := types.NamespacedName{
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Namespace: kustomization.GetNamespace(),
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Name: kustomization.GetName(),
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}
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var existing kustomizev1.Kustomization
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err := kubeClient.Get(ctx, namespacedName, &existing)
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if err != nil {
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if errors.IsNotFound(err) {
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if err := kubeClient.Create(ctx, &kustomization); err != nil {
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return err
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} else {
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logSuccess("kustomization created")
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return nil
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}
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}
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return err
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}
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existing.Spec = kustomization.Spec
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if err := kubeClient.Update(ctx, &existing); err != nil {
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return err
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}
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logSuccess("kustomization updated")
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return nil
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}
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func isKustomizationReady(ctx context.Context, kubeClient client.Client, name, namespace string) wait.ConditionFunc {
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return func() (bool, error) {
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var kustomization kustomizev1.Kustomization
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namespacedName := types.NamespacedName{
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Namespace: namespace,
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Name: name,
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}
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err := kubeClient.Get(ctx, namespacedName, &kustomization)
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if err != nil {
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return false, err
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}
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for _, condition := range kustomization.Status.Conditions {
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if condition.Type == sourcev1.ReadyCondition {
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if condition.Status == corev1.ConditionTrue {
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return true, nil
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} else if condition.Status == corev1.ConditionFalse {
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return false, fmt.Errorf(condition.Message)
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}
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}
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}
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return false, nil
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}
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}
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