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api.go
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api.go
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package main
import (
"context"
"fmt"
"net"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
corev1 "k8s.io/api/core/v1"
rbacv1 "k8s.io/api/rbac/v1"
"k8s.io/apimachinery/pkg/runtime"
kubescheme "k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/record"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/metrics/server"
kargoapi "github.com/akuity/kargo/api/v1alpha1"
"github.com/akuity/kargo/internal/api"
"github.com/akuity/kargo/internal/api/config"
"github.com/akuity/kargo/internal/api/kubernetes"
"github.com/akuity/kargo/internal/api/rbac"
rollouts "github.com/akuity/kargo/internal/controller/rollouts/api/v1alpha1"
"github.com/akuity/kargo/internal/kubeclient"
libEvent "github.com/akuity/kargo/internal/kubernetes/event"
"github.com/akuity/kargo/internal/os"
versionpkg "github.com/akuity/kargo/internal/version"
)
type apiOptions struct {
KubeConfig string
Host string
Port string
Logger *log.Logger
}
func newAPICommand() *cobra.Command {
cmdOpts := &apiOptions{
Logger: log.StandardLogger(),
}
cmd := &cobra.Command{
Use: "api",
DisableAutoGenTag: true,
SilenceErrors: true,
SilenceUsage: true,
RunE: func(cmd *cobra.Command, _ []string) error {
cmdOpts.complete()
return cmdOpts.run(cmd.Context())
},
}
return cmd
}
func (o *apiOptions) complete() {
o.KubeConfig = os.GetEnv("KUBECONFIG", "")
o.Host = os.GetEnv("HOST", "0.0.0.0")
o.Port = os.GetEnv("PORT", "8080")
}
func (o *apiOptions) run(ctx context.Context) error {
version := versionpkg.GetVersion()
o.Logger.WithFields(log.Fields{
"version": version.Version,
"commit": version.GitCommit,
}).Info("Starting Kargo API Server")
cfg := config.ServerConfigFromEnv()
clientCfg, internalClient, recorder, err := o.setupAPIClient(ctx)
if err != nil {
return fmt.Errorf("error setting up internal Kubernetes API client: %w", err)
}
kubeClient, err := newWrappedKubernetesClient(ctx, clientCfg, internalClient, cfg)
if err != nil {
return fmt.Errorf("error creating Kubernetes client for Kargo API server: %w", err)
}
switch {
case !cfg.RolloutsIntegrationEnabled:
o.Logger.Info("Argo Rollouts integration is disabled")
case !argoRolloutsExists(ctx, clientCfg):
o.Logger.Warn(
"Argo Rollouts integration was enabled, but no Argo Rollouts " +
"CRDs were found. Proceeding without Argo Rollouts integration.",
)
cfg.RolloutsIntegrationEnabled = false
default:
o.Logger.Info("Argo Rollouts integration is enabled")
}
if cfg.AdminConfig != nil {
o.Logger.Info("admin account is enabled")
}
if cfg.OIDCConfig != nil {
o.Logger.WithFields(log.Fields{
"issuerURL": cfg.OIDCConfig.IssuerURL,
"clientID": cfg.OIDCConfig.ClientID,
"cliClientID": cfg.OIDCConfig.CLIClientID,
}).Info("SSO via OpenID Connect is enabled")
}
srv := api.NewServer(
cfg,
kubeClient,
internalClient,
rbac.NewKubernetesRolesDatabase(kubeClient),
recorder,
)
l, err := net.Listen("tcp", fmt.Sprintf("%s:%s", o.Host, o.Port))
if err != nil {
return fmt.Errorf("error creating listener: %w", err)
}
defer l.Close()
if err = srv.Serve(ctx, l); err != nil {
return fmt.Errorf("error serving API: %w", err)
}
return nil
}
func (o *apiOptions) setupAPIClient(ctx context.Context) (*rest.Config, client.Client, record.EventRecorder, error) {
restCfg, err := kubernetes.GetRestConfig(ctx, o.KubeConfig)
if err != nil {
return nil, nil, nil, fmt.Errorf("get REST config: %w", err)
}
scheme := runtime.NewScheme()
if err = kubescheme.AddToScheme(scheme); err != nil {
return nil, nil, nil, fmt.Errorf("error adding Kubernetes API to Kargo API manager scheme: %w", err)
}
if err = rbacv1.AddToScheme(scheme); err != nil {
return nil, nil, nil, fmt.Errorf(
"error adding Kubernetes RBAC API to Kargo controller manager scheme: %w",
err,
)
}
if err = rollouts.AddToScheme(scheme); err != nil {
return nil, nil, nil, fmt.Errorf("error adding Argo Rollouts API to Kargo API manager scheme: %w", err)
}
if err = kargoapi.AddToScheme(scheme); err != nil {
return nil, nil, nil, fmt.Errorf("error adding Kargo API to Kargo API manager scheme: %w", err)
}
mgr, err := ctrl.NewManager(restCfg, ctrl.Options{
Scheme: scheme,
Metrics: server.Options{
BindAddress: "0",
},
Client: client.Options{
Cache: &client.CacheOptions{
DisableFor: []client.Object{
&corev1.Secret{},
},
},
},
})
if err != nil {
return nil, nil, nil, fmt.Errorf("error initializing Kargo API manager: %w", err)
}
if err = registerKargoIndexers(ctx, mgr); err != nil {
return nil, nil, nil, fmt.Errorf("failed to register Kargo indexers: %w", err)
}
go func() {
if err := mgr.Start(ctx); err != nil {
panic(fmt.Errorf("error starting Kargo API manager: %w", err))
}
}()
return restCfg, mgr.GetClient(), libEvent.NewRecorder(ctx, scheme, mgr.GetClient(), "api"), nil
}
func registerKargoIndexers(ctx context.Context, mgr ctrl.Manager) error {
// Index Promotions by Stage
if err := kubeclient.IndexPromotionsByStage(ctx, mgr); err != nil {
return fmt.Errorf("index Promotions by Stage: %w", err)
}
// Index Freight by Warehouse
if err := kubeclient.IndexFreightByWarehouse(ctx, mgr); err != nil {
return fmt.Errorf("index Freight by Warehouse: %w", err)
}
// Index Freight by Stages in which it has been verified
if err := kubeclient.IndexFreightByVerifiedStages(ctx, mgr); err != nil {
return fmt.Errorf("index Freight by Stages in which it has been verified: %w", err)
}
// Index Freight by Stages for which it is approved
if err := kubeclient.IndexFreightByApprovedStages(ctx, mgr); err != nil {
return fmt.Errorf("index Freight by Stages for which it has been approved: %w", err)
}
// Index ServiceAccounts by OIDC email
if err := kubeclient.IndexServiceAccountsByOIDCEmail(ctx, mgr); err != nil {
return fmt.Errorf("index ServiceAccounts by OIDC email: %w", err)
}
// Index ServiceAccounts by OIDC groups
if err := kubeclient.IndexServiceAccountsByOIDCGroups(ctx, mgr); err != nil {
return fmt.Errorf("index ServiceAccounts by OIDC groups: %w", err)
}
// Index ServiceAccounts by OIDC subjects
if err := kubeclient.IndexServiceAccountsByOIDCSubjects(ctx, mgr); err != nil {
return fmt.Errorf("index ServiceAccounts by OIDC subjects: %w", err)
}
// Index Events by InvolvedObject's API Group
if err := kubeclient.IndexEventsByInvolvedObjectAPIGroup(ctx, mgr); err != nil {
return fmt.Errorf("index Events by InvolvedObject's API group: %w", err)
}
return nil
}
func newWrappedKubernetesClient(
ctx context.Context,
restCfg *rest.Config,
internalClient client.Client,
serverCfg config.ServerConfig,
) (kubernetes.Client, error) {
kubeClientOptions := kubernetes.ClientOptions{
NewInternalClient: func(context.Context, *rest.Config, *runtime.Scheme) (client.Client, error) {
return internalClient, nil
},
}
if serverCfg.OIDCConfig != nil {
kubeClientOptions.GlobalServiceAccountNamespaces = serverCfg.OIDCConfig.GlobalServiceAccountNamespaces
}
return kubernetes.NewClient(ctx, restCfg, kubeClientOptions)
}