91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
package idresolver
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import (
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"fmt"
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"golang.org/x/net/context"
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"github.com/docker/docker/api/types/swarm"
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"github.com/docker/docker/client"
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"github.com/docker/docker/pkg/stringid"
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)
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// IDResolver provides ID to Name resolution.
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type IDResolver struct {
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client client.APIClient
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noResolve bool
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cache map[string]string
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}
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// New creates a new IDResolver.
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func New(client client.APIClient, noResolve bool) *IDResolver {
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return &IDResolver{
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client: client,
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noResolve: noResolve,
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cache: make(map[string]string),
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}
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}
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func (r *IDResolver) get(ctx context.Context, t interface{}, id string) (string, error) {
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switch t := t.(type) {
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case swarm.Node:
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node, _, err := r.client.NodeInspectWithRaw(ctx, id)
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if err != nil {
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return id, nil
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}
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if node.Spec.Annotations.Name != "" {
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return node.Spec.Annotations.Name, nil
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}
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if node.Description.Hostname != "" {
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return node.Description.Hostname, nil
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}
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return id, nil
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case swarm.Service:
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service, _, err := r.client.ServiceInspectWithRaw(ctx, id)
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if err != nil {
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return id, nil
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}
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return service.Spec.Annotations.Name, nil
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case swarm.Task:
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// If the caller passes the full task there's no need to do a lookup.
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if t.ID == "" {
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var err error
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t, _, err = r.client.TaskInspectWithRaw(ctx, id)
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if err != nil {
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return id, nil
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}
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}
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taskID := stringid.TruncateID(t.ID)
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if t.ServiceID == "" {
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return taskID, nil
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}
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service, err := r.Resolve(ctx, swarm.Service{}, t.ServiceID)
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if err != nil {
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return "", err
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}
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return fmt.Sprintf("%s.%d.%s", service, t.Slot, taskID), nil
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default:
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return "", fmt.Errorf("unsupported type")
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}
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}
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// Resolve will attempt to resolve an ID to a Name by querying the manager.
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// Results are stored into a cache.
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// If the `-n` flag is used in the command-line, resolution is disabled.
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func (r *IDResolver) Resolve(ctx context.Context, t interface{}, id string) (string, error) {
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if r.noResolve {
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return id, nil
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}
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if name, ok := r.cache[id]; ok {
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return name, nil
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}
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name, err := r.get(ctx, t, id)
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if err != nil {
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return "", err
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}
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r.cache[id] = name
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return name, nil
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}
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