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stack.go
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stack.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 planning
import (
"context"
"sort"
"strings"
"google.golang.org/grpc"
"google.golang.org/protobuf/proto"
"namespacelabs.dev/foundation/internal/compute"
"namespacelabs.dev/foundation/internal/executor"
"namespacelabs.dev/foundation/internal/fnerrors"
"namespacelabs.dev/foundation/internal/parsing"
"namespacelabs.dev/foundation/internal/planning/eval"
"namespacelabs.dev/foundation/internal/planning/invocation"
"namespacelabs.dev/foundation/internal/planning/planninghooks"
"namespacelabs.dev/foundation/internal/planning/tool/protocol"
"namespacelabs.dev/foundation/internal/runtime/rtypes"
"namespacelabs.dev/foundation/internal/runtime/tools"
"namespacelabs.dev/foundation/internal/versions"
runtimepb "namespacelabs.dev/foundation/library/runtime"
"namespacelabs.dev/foundation/schema"
"namespacelabs.dev/foundation/std/pkggraph"
"namespacelabs.dev/foundation/std/tasks"
)
type Stack struct {
Focus schema.PackageList
Servers []PlannedServer
Endpoints []*schema.Endpoint
InternalEndpoints []*schema.InternalEndpoint
}
type ProvisionOpts struct {
PortRange eval.PortRange
}
type PlannedServer struct {
Server
DeclaredStack schema.PackageList
ParsedDeps []*ParsedNode
Resources []pkggraph.ResourceInstance
Endpoints []*schema.Endpoint
InternalEndpoints []*schema.InternalEndpoint
}
func (p PlannedServer) SidecarsAndInits() ([]*schema.SidecarContainer, []*schema.SidecarContainer) {
var sidecars, inits []*schema.SidecarContainer
sidecars = append(sidecars, p.Server.Provisioning.Sidecars...)
inits = append(inits, p.Server.Provisioning.Inits...)
for _, dep := range p.ParsedDeps {
sidecars = append(sidecars, dep.ProvisionPlan.Sidecars...)
inits = append(inits, dep.ProvisionPlan.Inits...)
}
return sidecars, inits
}
type ParsedNode struct {
Package *pkggraph.Package
ProvisionPlan pkggraph.ProvisionPlan
Allocations []pkggraph.ValueWithPath
PrepareProps planninghooks.ProvisionResult
}
func (stack *Stack) AllPackageList() schema.PackageList {
var pl schema.PackageList
for _, srv := range stack.Servers {
pl.Add(srv.PackageName())
}
return pl
}
func (stack *Stack) Proto() *schema.Stack {
s := &schema.Stack{
Endpoint: stack.Endpoints,
InternalEndpoint: stack.InternalEndpoints,
}
for _, srv := range stack.Servers {
s.Entry = append(s.Entry, srv.Server.StackEntry())
}
return s
}
func (stack *Stack) Get(srv schema.PackageName) (PlannedServer, bool) {
for k, s := range stack.Servers {
if s.PackageName() == srv {
return stack.Servers[k], true
}
}
return PlannedServer{}, false
}
func ComputeStack(ctx context.Context, servers Servers, opts ProvisionOpts) (*Stack, error) {
return tasks.Return(ctx, tasks.Action("planning.compute").Scope(servers.Packages().PackageNames()...),
func(ctx context.Context) (*Stack, error) {
return computeStack(ctx, opts, servers...)
})
}
// XXX Unfortunately as we are today we need to pass provisioning information to stack computation
// because we need to yield definitions which have ports already materialized. Port allocation is
// more of a "startup" responsibility but this kept things simpler.
func computeStack(ctx context.Context, opts ProvisionOpts, servers ...Server) (*Stack, error) {
if len(servers) == 0 {
return nil, fnerrors.InternalError("no server specified")
}
var builder stackBuilder
focus := make([]schema.PackageName, len(servers))
for k, server := range servers {
focus[k] = server.PackageName()
}
cs := computeState{exec: executor.New(ctx, "planning.compute"), out: &builder}
for _, srv := range servers {
srv := srv // Close srv.
cs.exec.Go(func(ctx context.Context) error {
return cs.recursivelyComputeServerContents(ctx, srv.SealedContext(), srv.PackageName(), opts)
})
}
if err := cs.exec.Wait(); err != nil {
return nil, err
}
return builder.buildStack(focus...), nil
}
type computeState struct {
exec *executor.Executor
out *stackBuilder
}
func (cs *computeState) recursivelyComputeServerContents(ctx context.Context, pkgs pkggraph.SealedContext, pkg schema.PackageName, opts ProvisionOpts) error {
ps, existing := cs.out.claim(pkg)
if existing {
return nil // Already added.
}
srv, err := RequireLoadedServer(ctx, pkgs, pkg)
if err != nil {
return err
}
if err := computeServerContents(ctx, srv, opts, ps); err != nil {
return err
}
for _, pkg := range ps.DeclaredStack.PackageNames() {
pkg := pkg // Close pkg.
cs.exec.Go(func(ctx context.Context) error {
return cs.recursivelyComputeServerContents(ctx, pkgs, pkg, opts)
})
}
return nil
}
func computeServerContents(ctx context.Context, server Server, opts ProvisionOpts, ps *PlannedServer) error {
return tasks.Action("provision.evaluate").Scope(server.PackageName()).Run(ctx, func(ctx context.Context) error {
deps := server.Deps()
parsedDeps := make([]*ParsedNode, len(deps))
exec := executor.New(ctx, "stack.provision.eval")
for k, n := range deps {
k := k // Close k.
node := n // Close n.
exec.Go(func(ctx context.Context) error {
ev, err := EvalProvision(ctx, server, node)
if err != nil {
return err
}
parsedDeps[k] = ev
return nil
})
}
if err := exec.Wait(); err != nil {
return err
}
var allocatedPorts eval.PortAllocations
var allocators []eval.AllocatorFunc
allocators = append(allocators, eval.MakePortAllocator(server.Proto(), opts.PortRange, &allocatedPorts))
var depsWithNeeds []*ParsedNode
for _, p := range parsedDeps {
if len(p.Package.Node().GetNeed()) > 0 {
depsWithNeeds = append(depsWithNeeds, p)
}
}
// Make sure that port allocation is stable.
sort.Slice(depsWithNeeds, func(i, j int) bool {
return strings.Compare(depsWithNeeds[i].Package.PackageName().String(),
depsWithNeeds[j].Package.PackageName().String()) < 0
})
state := eval.NewAllocState()
for _, dwn := range depsWithNeeds {
allocs, err := fillNeeds(ctx, server.Proto(), state, allocators, dwn.Package.Node())
if err != nil {
return err
}
dwn.Allocations = allocs
}
var declaredStack schema.PackageList
declaredStack.AddMultiple(server.Provisioning.DeclaredStack...)
for _, p := range parsedDeps {
declaredStack.AddMultiple(p.ProvisionPlan.DeclaredStack...)
}
ps.Server = server
ps.ParsedDeps = parsedDeps
ps.DeclaredStack = declaredStack
resources, err := parsing.LoadResources(ctx, server.SealedContext(), server.Package, server.Proto().GetResourcePack())
if err != nil {
return err
}
ps.Resources = append(ps.Resources, resources...)
if err := discoverDeclaredServers(resources, &ps.DeclaredStack); err != nil {
return err
}
// Fill in env-bound data now, post ports allocation.
endpoints, internal, err := ComputeEndpoints(server, allocatedPorts.Ports)
if err != nil {
return err
}
ps.Endpoints = endpoints
ps.InternalEndpoints = internal
return err
})
}
func discoverDeclaredServers(resources []pkggraph.ResourceInstance, serverList *schema.PackageList) error {
for _, res := range resources {
switch {
case parsing.IsServerResource(res.Spec.Class.Ref):
serverIntent := &runtimepb.ServerIntent{}
if err := proto.Unmarshal(res.Spec.Source.Intent.Value, serverIntent); err != nil {
return fnerrors.InternalError("failed to unwrap Server")
}
serverList.Add(schema.PackageName(serverIntent.PackageName))
case parsing.IsSecretResource(res.Spec.Class.Ref):
// Nothing to do.
default:
if err := discoverDeclaredServers(res.Spec.ResourceInputs, serverList); err != nil {
return err
}
if res.Spec.Provider != nil {
if err := discoverDeclaredServers(res.Spec.Provider.Resources, serverList); err != nil {
return err
}
}
}
}
return nil
}
func EvalProvision(ctx context.Context, server Server, n *pkggraph.Package) (*ParsedNode, error) {
return tasks.Return(ctx, tasks.Action("package.eval.provisioning").Scope(n.PackageName()).Arg("server", server.PackageName()), func(ctx context.Context) (*ParsedNode, error) {
pn, err := evalProvision(ctx, server, n)
if err != nil {
return nil, fnerrors.Wrap(n.Location, err)
}
return pn, nil
})
}
func evalProvision(ctx context.Context, server Server, node *pkggraph.Package) (*ParsedNode, error) {
var combinedProps planninghooks.InternalPrepareProps
for _, hook := range node.PrepareHooks {
if hook.InvokeInternal != "" {
props, err := planninghooks.InvokeInternalPrepareHook(ctx, hook.InvokeInternal, server.SealedContext(), server.StackEntry())
if err != nil {
return nil, fnerrors.Wrap(node.Location, err)
}
if props == nil {
continue
}
combinedProps.AppendWith(*props)
} else if hook.InvokeBinary != nil {
// XXX combine all builds beforehand.
inv, err := invocation.Make(ctx, server.SealedContext(), server.SealedContext(), nil, hook.InvokeBinary)
if err != nil {
return nil, err
}
if len(inv.Inject) > 0 {
return nil, fnerrors.BadInputError("injection requested when it's not possible: %v", inv.Inject)
}
opts := rtypes.RunToolOpts{
ImageName: inv.ImageName,
RunBinaryOpts: rtypes.RunBinaryOpts{
Command: inv.Command,
Args: inv.Args,
WorkingDir: inv.WorkingDir,
},
// XXX security prepare invocations have network access.
}
if (tools.CanConsumePublicImages(server.SealedContext().Configuration()) || tools.InvocationCanUseBuildkit) && inv.PublicImageID != nil {
opts.PublicImageID = inv.PublicImageID
} else {
image, err := compute.GetValue(ctx, inv.Image)
if err != nil {
return nil, err
}
hostPlatform, err := tools.HostPlatform(ctx, server.SealedContext().Configuration())
if err != nil {
return nil, err
}
opts.Image, err = image.ImageForPlatform(hostPlatform)
if err != nil {
return nil, err
}
}
var invoke tools.LowLevelInvokeOptions[*protocol.PrepareRequest, *protocol.PrepareResponse]
req := &protocol.PrepareRequest{
Env: server.SealedContext().Environment(),
Server: server.Proto(),
ApiVersion: versions.APIVersion,
}
var resp *protocol.PrepareResponse
if tools.InvocationCanUseBuildkit && opts.PublicImageID != nil {
resp, err = invoke.InvokeOnBuildkit(ctx, server.SealedContext().Configuration(), "foundation.provision.tool.protocol.PrepareService/Prepare",
node.PackageName(), *opts.PublicImageID, opts, req)
} else {
resp, err = invoke.Invoke(ctx, server.SealedContext().Configuration(), node.PackageName(), opts, req,
func(conn *grpc.ClientConn) func(context.Context, *protocol.PrepareRequest, ...grpc.CallOption) (*protocol.PrepareResponse, error) {
return protocol.NewPrepareServiceClient(conn).Prepare
})
}
if err != nil {
return nil, err
}
var pl schema.PackageList
for _, p := range resp.GetPreparedProvisionPlan().GetDeclaredStack() {
pl.Add(schema.PackageName(p))
}
if len(resp.DeprecatedProvisionInput) > 0 {
return nil, fnerrors.BadInputError("setting provision inputs is deprecated, use serialized message")
}
props := planninghooks.InternalPrepareProps{
PreparedProvisionPlan: pkggraph.PreparedProvisionPlan{
DeclaredStack: pl.PackageNames(),
ComputePlanWith: resp.GetPreparedProvisionPlan().GetProvisioning(),
Sidecars: resp.GetPreparedProvisionPlan().GetSidecar(),
Inits: resp.GetPreparedProvisionPlan().GetInit(),
},
ProvisionResult: planninghooks.ProvisionResult{
SerializedProvisionInput: resp.ProvisionInput,
Extension: resp.Extension,
ServerExtension: resp.ServerExtension,
},
}
combinedProps.AppendWith(props)
}
}
// We need to make sure that `env` is available before we read extend.stack, as env is often used
// for branching.
pdata, err := node.Parsed.EvalProvision(ctx, server.SealedContext(), pkggraph.ProvisionInputs{
ServerLocation: server.Location,
})
if err != nil {
return nil, fnerrors.Wrap(node.Location, err)
}
if pdata.Naming != nil {
return nil, fnerrors.UserError(node.Location, "nodes can't provide naming specifications")
}
for _, sidecar := range combinedProps.PreparedProvisionPlan.Sidecars {
sidecar.Owner = node.PackageName().String()
}
for _, sidecar := range combinedProps.PreparedProvisionPlan.Inits {
sidecar.Owner = node.PackageName().String()
}
pdata.AppendWith(combinedProps.PreparedProvisionPlan)
parsed := &ParsedNode{Package: node, ProvisionPlan: pdata}
parsed.PrepareProps.ProvisionInput = combinedProps.ProvisionInput
parsed.PrepareProps.Extension = combinedProps.Extension
parsed.PrepareProps.ServerExtension = combinedProps.ServerExtension
return parsed, nil
}
func fillNeeds(ctx context.Context, server *schema.Server, s *eval.AllocState, allocators []eval.AllocatorFunc, n *schema.Node) ([]pkggraph.ValueWithPath, error) {
var values []pkggraph.ValueWithPath
for k := 0; k < len(n.GetNeed()); k++ {
vwp, err := s.Alloc(ctx, server, allocators, n, k)
if err != nil {
return nil, err
}
values = append(values, vwp)
}
return values, nil
}