mirror of
https://github.com/psviderski/uncloud.git
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113 lines
3.3 KiB
Go
113 lines
3.3 KiB
Go
package compose
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import (
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"context"
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"errors"
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"fmt"
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"github.com/compose-spec/compose-go/v2/graph"
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"github.com/compose-spec/compose-go/v2/types"
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"github.com/psviderski/uncloud/pkg/api"
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"github.com/psviderski/uncloud/pkg/client/deploy"
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)
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type Client interface {
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api.DNSClient
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deploy.Client
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}
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type Deployment struct {
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Client Client
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Project *types.Project
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SpecResolver *deploy.ServiceSpecResolver
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plan *deploy.SequenceOperation
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}
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func NewDeployment(ctx context.Context, cli Client, project *types.Project) (*Deployment, error) {
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domain, err := cli.GetDomain(ctx)
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if err != nil && !errors.Is(err, api.ErrNotFound) {
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return nil, fmt.Errorf("get cluster domain: %w", err)
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}
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resolver := &deploy.ServiceSpecResolver{
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// If the domain is not found (not reserved), an empty domain is used for the resolver.
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ClusterDomain: domain,
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// TODO: provide an image resolver.
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}
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return &Deployment{
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Client: cli,
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Project: project,
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SpecResolver: resolver,
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}, nil
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}
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func (d *Deployment) Plan(ctx context.Context) (deploy.SequenceOperation, error) {
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if d.plan != nil {
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return *d.plan, nil
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}
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plan := deploy.SequenceOperation{}
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err := graph.InDependencyOrder(ctx, d.Project,
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func(ctx context.Context, name string, _ types.ServiceConfig) error {
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spec, err := d.ServiceSpec(name)
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if err != nil {
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return fmt.Errorf("convert compose service '%s' to service spec: %w", name, err)
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}
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// TODO: properly handle depends_on conditions in the service deployment plan as the first operation.
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deployment, err := deploy.NewDeployment(ctx, d.Client, spec, nil)
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if err != nil {
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return fmt.Errorf("create deployment for service '%s': %w", name, err)
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}
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servicePlan, err := deployment.Plan(ctx)
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if err != nil {
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return fmt.Errorf("create deployment plan for service '%s': %w", name, err)
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}
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// Skip no-op (up-to-date) service plans.
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if len(servicePlan.Operations) > 0 {
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plan.Operations = append(plan.Operations, &servicePlan)
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}
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return nil
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})
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if err != nil {
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d.plan = &plan
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}
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return plan, err
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}
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// ServiceSpec returns the service specification for the given compose service that is ready for deployment.
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func (d *Deployment) ServiceSpec(name string) (api.ServiceSpec, error) {
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service, err := d.Project.GetService(name)
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if err != nil {
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return api.ServiceSpec{}, fmt.Errorf("get config for compose service '%s': %w", name, err)
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}
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spec, err := ServiceSpecFromCompose(name, service)
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if err != nil {
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return spec, fmt.Errorf("convert compose service '%s' to service spec: %w", name, err)
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}
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// TODO: resolve the image to a digest and supported platforms using an image resolver that broadcasts requests
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// to all machines in the cluster. If service.PullPolicy is "missing":
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// - Broadcast request if any machine contains a particular image and resolve it to image@digest.
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// - If not found, broadcast request to resolve an image using a registry, and resolve it to image@digest.
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// TODO: configure placement filter based on the supported platforms of the image.
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// TODO: maybe instantiate ImageResolver here based on PullPolicy of each service?
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return spec, nil
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}
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func (d *Deployment) Run(ctx context.Context) error {
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plan, err := d.Plan(ctx)
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if err != nil {
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return fmt.Errorf("create plan: %w", err)
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}
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return plan.Execute(ctx, d.Client)
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}
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