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package network
import (
"context"
"fmt"
"github.com/docker/swarmkit/api"
)
// GetNetwork tries to query for a network as an ID and if it can't be
// found tries to query as a name. If the name query returns exactly
// one entry then it is returned to the caller. Otherwise an error is
// returned.
func GetNetwork(ctx context.Context, c api.ControlClient, input string) (*api.Network, error) {
// GetService to match via full ID.
rg, err := c.GetNetwork(ctx, &api.GetNetworkRequest{NetworkID: input})
if err != nil {
// If any error (including NotFound), ListServices to match via full name.
rl, err := c.ListNetworks(ctx,
&api.ListNetworksRequest{
Filters: &api.ListNetworksRequest_Filters{
Names: []string{input},
},
},
)
if err != nil {
return nil, err
}
if len(rl.Networks) == 0 {
return nil, fmt.Errorf("network %s not found", input)
}
if l := len(rl.Networks); l > 1 {
return nil, fmt.Errorf("network %s is ambiguous (%d matches found)", input, l)
}
return rl.Networks[0], nil
}
return rg.Network, nil
}
// ResolveServiceNetworks takes a service spec and resolves network names to network IDs.
func ResolveServiceNetworks(ctx context.Context, c api.ControlClient, spec *api.ServiceSpec) error {
if len(spec.Task.Networks) == 0 {
return nil
}
networks := make([]*api.NetworkAttachmentConfig, 0, len(spec.Task.Networks))
for _, na := range spec.Task.Networks {
n, err := GetNetwork(ctx, c, na.Target)
if err != nil {
return err
}
networks = append(networks, &api.NetworkAttachmentConfig{
Target: n.ID,
})
}
spec.Task.Networks = networks
return nil
}
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