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runtime.go
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runtime.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package kubernetes
import (
"context"
"fmt"
applycorev1 "k8s.io/client-go/applyconfigurations/core/v1"
"k8s.io/client-go/discovery"
"k8s.io/client-go/restmapper"
"namespacelabs.dev/foundation/framework/kubernetes/kubedef"
"namespacelabs.dev/foundation/framework/kubernetes/kubeobj"
"namespacelabs.dev/foundation/framework/kubernetes/kubetool"
"namespacelabs.dev/foundation/internal/console"
"namespacelabs.dev/foundation/internal/fnerrors"
"namespacelabs.dev/foundation/internal/networking/ingress"
"namespacelabs.dev/foundation/internal/planning/planninghooks"
"namespacelabs.dev/foundation/internal/runtime"
"namespacelabs.dev/foundation/internal/runtime/kubernetes/client"
"namespacelabs.dev/foundation/internal/runtime/rtypes"
"namespacelabs.dev/foundation/schema"
runtimepb "namespacelabs.dev/foundation/schema/runtime"
"namespacelabs.dev/foundation/std/cfg"
"namespacelabs.dev/foundation/std/tasks"
)
var (
ObserveInitContainerLogs = false
kubernetesEnvConfigType = cfg.DefineConfigType[*kubetool.KubernetesEnv]()
kubernetesDeploymentPlanning = cfg.DefineConfigType[*client.DeploymentPlanning]()
)
const (
DiscoveryStateKey = "kubernetes.discovery"
RestmapperStateKey = "kubernetes.restmapper"
)
type ProvideOverrideFunc func(context.Context, cfg.Configuration) (runtime.Class, error)
var classOverrides = map[string]ProvideOverrideFunc{}
func RegisterOverrideClass(name string, p ProvideOverrideFunc) {
classOverrides[name] = p
}
func Register() {
runtime.Register("kubernetes", func(ctx context.Context, cfg cfg.Configuration) (runtime.Class, error) {
hostEnv, err := client.CheckGetHostEnv(cfg)
if err != nil {
return nil, err
}
fmt.Fprintf(console.Debug(ctx), "kubernetes: selected %+v for %q\n", hostEnv, cfg.EnvKey())
tasks.TraceCaller(ctx, console.Debug, "kubernetes.New")
if hostEnv.Provider != "" {
if provider := classOverrides[hostEnv.Provider]; provider != nil {
klass, err := provider(ctx, cfg)
if err != nil {
return nil, err
}
if klass != nil {
return klass, nil
}
}
}
return kubernetesClass{}, nil
})
runtime.RegisterPrepare(DiscoveryStateKey, func(ctx context.Context, _ cfg.Configuration, cluster runtime.Cluster) (any, error) {
unwrap, ok := cluster.(UnwrapCluster)
if !ok {
return nil, fnerrors.InternalError("expected kubernetes cluster")
}
kube := unwrap.KubernetesCluster()
return client.NewDiscoveryClient(kube.RESTConfig(), kube.Prepared.Configuration.Ephemeral)
})
runtime.RegisterPrepare(RestmapperStateKey, func(ctx context.Context, _ cfg.Configuration, cluster runtime.Cluster) (any, error) {
discoveryClient, err := cluster.EnsureState(ctx, DiscoveryStateKey)
if err != nil {
return nil, err
}
return restmapper.NewDeferredDiscoveryRESTMapper(discoveryClient.(discovery.CachedDiscoveryInterface)), nil
})
planninghooks.RegisterPrepareHook("namespacelabs.dev/foundation/std/runtime/kubernetes.ApplyServerExtensions", prepareApplyServerExtensions)
}
type kubernetesClass struct{}
var _ runtime.Class = kubernetesClass{}
func (d kubernetesClass) AttachToCluster(ctx context.Context, cfg cfg.Configuration) (runtime.Cluster, error) {
return ConnectToCluster(ctx, cfg)
}
func (d kubernetesClass) EnsureCluster(ctx context.Context, env cfg.Context, purpose string) (runtime.Cluster, error) {
return ConnectToCluster(ctx, env.Configuration())
}
func (d kubernetesClass) Planner(ctx context.Context, cfg cfg.Context, purpose string) (runtime.Planner, error) {
cluster, err := ConnectToCluster(ctx, cfg.Configuration())
if err != nil {
return nil, err
}
ingressClass, err := ingress.FromConfig(cluster.Prepared)
if err != nil {
return nil, err
}
planner, err := NewPlanner(ctx, cfg, cluster.FetchSystemInfo, ingressClass)
if err != nil {
return nil, err
}
planner.underlying = cluster
return planner, nil
}
func bindNamespace(env cfg.Context) BoundNamespace {
ns := ModuleNamespace(env.Workspace().Proto(), env.Environment())
if conf, ok := kubernetesEnvConfigType.CheckGet(env.Configuration()); ok {
ns = conf.Namespace
}
b := BoundNamespace{env: env.Environment(), namespace: ns}
if conf, ok := kubernetesDeploymentPlanning.CheckGet(env.Configuration()); ok {
b.planning = conf
}
return b
}
func MakeNamespace(env *schema.Environment, ns string) *applycorev1.NamespaceApplyConfiguration {
return applycorev1.Namespace(ns).
WithLabels(kubedef.MakeLabels(env, nil)).
WithAnnotations(kubedef.MakeAnnotations(env))
}
func PrepareProvisionWith(env *schema.Environment, ns string, systemInfo *kubedef.SystemInfo) (*rtypes.RuntimeProvisionProps, error) {
// Ensure the namespace exist, before we go and apply definitions to it. Also, deployServer
// assumes that a namespace already exists.
def, err := (kubedef.Apply{
Description: fmt.Sprintf("Namespace for %q", env.Name),
Resource: MakeNamespace(env, ns),
}).ToDefinition()
if err != nil {
return nil, err
}
// Pass the computed namespace to the provisioning tool.
return &rtypes.RuntimeProvisionProps{
ProvisionInput: []rtypes.ProvisionInput{
{Message: &kubetool.KubernetesEnv{Namespace: ns}},
{Message: systemInfo},
},
Invocation: []*schema.SerializedInvocation{def},
}, nil
}
func (r *Cluster) AttachTerminal(ctx context.Context, reference *runtimepb.ContainerReference, rio runtime.TerminalIO) error {
cpr := &kubeobj.ContainerPodReference{}
if err := reference.Opaque.UnmarshalTo(cpr); err != nil {
return fnerrors.InternalError("invalid reference: %w", err)
}
return r.attachTerminal(ctx, r.cli, cpr, rio)
}