dotcloud/docker

package cluster // import "github.com/docker/docker/daemon/cluster"

import (
    "context"
    "fmt"

    "github.com/docker/docker/errdefs"
    swarmapi "github.com/moby/swarmkit/v2/api"
    "github.com/pkg/errors"
)

func getSwarm(ctx context.Context, c swarmapi.ControlClient) (*swarmapi.Cluster, error) {
    rl, err := c.ListClusters(ctx, &swarmapi.ListClustersRequest{})
    if err != nil {
        return nil, err
    }

    if len(rl.Clusters) == 0 {
        return nil, errors.WithStack(errNoSwarm)
    }

    // TODO: assume one cluster only
    return rl.Clusters[0], nil
}

func getNode(ctx context.Context, c swarmapi.ControlClient, input string) (*swarmapi.Node, error) {
    // GetNode to match via full ID.
    if rg, err := c.GetNode(ctx, &swarmapi.GetNodeRequest{NodeID: input}); err == nil {
        return rg.Node, nil
    }

    // If any error (including NotFound), ListNodes to match via full name.
    rl, err := c.ListNodes(ctx, &swarmapi.ListNodesRequest{
        Filters: &swarmapi.ListNodesRequest_Filters{
            Names: []string{input},
        },
    })
    if err != nil || len(rl.Nodes) == 0 {
        // If any error or 0 result, ListNodes to match via ID prefix.
        rl, err = c.ListNodes(ctx, &swarmapi.ListNodesRequest{
            Filters: &swarmapi.ListNodesRequest_Filters{
                IDPrefixes: []string{input},
            },
        })
    }
    if err != nil {
        return nil, err
    }

    if len(rl.Nodes) == 0 {
        err := fmt.Errorf("node %s not found", input)
        return nil, errdefs.NotFound(err)
    }

    if l := len(rl.Nodes); l > 1 {
        return nil, errdefs.InvalidParameter(fmt.Errorf("node %s is ambiguous (%d matches found)", input, l))
    }

    return rl.Nodes[0], nil
}

func getService(ctx context.Context, c swarmapi.ControlClient, input string, insertDefaults bool) (*swarmapi.Service, error) {
    // GetService to match via full ID.
    if rg, err := c.GetService(ctx, &swarmapi.GetServiceRequest{ServiceID: input, InsertDefaults: insertDefaults}); err == nil {
        return rg.Service, nil
    }

    // If any error (including NotFound), ListServices to match via full name.
    rl, err := c.ListServices(ctx, &swarmapi.ListServicesRequest{
        Filters: &swarmapi.ListServicesRequest_Filters{
            Names: []string{input},
        },
    })
    if err != nil || len(rl.Services) == 0 {
        // If any error or 0 result, ListServices to match via ID prefix.
        rl, err = c.ListServices(ctx, &swarmapi.ListServicesRequest{
            Filters: &swarmapi.ListServicesRequest_Filters{
                IDPrefixes: []string{input},
            },
        })
    }
    if err != nil {
        return nil, err
    }

    if len(rl.Services) == 0 {
        err := fmt.Errorf("service %s not found", input)
        return nil, errdefs.NotFound(err)
    }

    if l := len(rl.Services); l > 1 {
        return nil, errdefs.InvalidParameter(fmt.Errorf("service %s is ambiguous (%d matches found)", input, l))
    }

    if !insertDefaults {
        return rl.Services[0], nil
    }

    rg, err := c.GetService(ctx, &swarmapi.GetServiceRequest{ServiceID: rl.Services[0].ID, InsertDefaults: true})
    if err == nil {
        return rg.Service, nil
    }
    return nil, err
}

func getTask(ctx context.Context, c swarmapi.ControlClient, input string) (*swarmapi.Task, error) {
    // GetTask to match via full ID.
    if rg, err := c.GetTask(ctx, &swarmapi.GetTaskRequest{TaskID: input}); err == nil {
        return rg.Task, nil
    }

    // If any error (including NotFound), ListTasks to match via full name.
    rl, err := c.ListTasks(ctx, &swarmapi.ListTasksRequest{
        Filters: &swarmapi.ListTasksRequest_Filters{
            Names: []string{input},
        },
    })
    if err != nil || len(rl.Tasks) == 0 {
        // If any error or 0 result, ListTasks to match via ID prefix.
        rl, err = c.ListTasks(ctx, &swarmapi.ListTasksRequest{
            Filters: &swarmapi.ListTasksRequest_Filters{
                IDPrefixes: []string{input},
            },
        })
    }
    if err != nil {
        return nil, err
    }

    if len(rl.Tasks) == 0 {
        err := fmt.Errorf("task %s not found", input)
        return nil, errdefs.NotFound(err)
    }

    if l := len(rl.Tasks); l > 1 {
        return nil, errdefs.InvalidParameter(fmt.Errorf("task %s is ambiguous (%d matches found)", input, l))
    }

    return rl.Tasks[0], nil
}

func getSecret(ctx context.Context, c swarmapi.ControlClient, input string) (*swarmapi.Secret, error) {
    // attempt to lookup secret by full ID
    if rg, err := c.GetSecret(ctx, &swarmapi.GetSecretRequest{SecretID: input}); err == nil {
        return rg.Secret, nil
    }

    // If any error (including NotFound), ListSecrets to match via full name.
    rl, err := c.ListSecrets(ctx, &swarmapi.ListSecretsRequest{
        Filters: &swarmapi.ListSecretsRequest_Filters{
            Names: []string{input},
        },
    })
    if err != nil || len(rl.Secrets) == 0 {
        // If any error or 0 result, ListSecrets to match via ID prefix.
        rl, err = c.ListSecrets(ctx, &swarmapi.ListSecretsRequest{
            Filters: &swarmapi.ListSecretsRequest_Filters{
                IDPrefixes: []string{input},
            },
        })
    }
    if err != nil {
        return nil, err
    }

    if len(rl.Secrets) == 0 {
        err := fmt.Errorf("secret %s not found", input)
        return nil, errdefs.NotFound(err)
    }

    if l := len(rl.Secrets); l > 1 {
        return nil, errdefs.InvalidParameter(fmt.Errorf("secret %s is ambiguous (%d matches found)", input, l))
    }

    return rl.Secrets[0], nil
}

func getConfig(ctx context.Context, c swarmapi.ControlClient, input string) (*swarmapi.Config, error) {
    // attempt to lookup config by full ID
    if rg, err := c.GetConfig(ctx, &swarmapi.GetConfigRequest{ConfigID: input}); err == nil {
        return rg.Config, nil
    }

    // If any error (including NotFound), ListConfigs to match via full name.
    rl, err := c.ListConfigs(ctx, &swarmapi.ListConfigsRequest{
        Filters: &swarmapi.ListConfigsRequest_Filters{
            Names: []string{input},
        },
    })
    if err != nil || len(rl.Configs) == 0 {
        // If any error or 0 result, ListConfigs to match via ID prefix.
        rl, err = c.ListConfigs(ctx, &swarmapi.ListConfigsRequest{
            Filters: &swarmapi.ListConfigsRequest_Filters{
                IDPrefixes: []string{input},
            },
        })
    }
    if err != nil {
        return nil, err
    }

    if len(rl.Configs) == 0 {
        err := fmt.Errorf("config %s not found", input)
        return nil, errdefs.NotFound(err)
    }

    if l := len(rl.Configs); l > 1 {
        return nil, errdefs.InvalidParameter(fmt.Errorf("config %s is ambiguous (%d matches found)", input, l))
    }

    return rl.Configs[0], nil
}

func getNetwork(ctx context.Context, c swarmapi.ControlClient, input string) (*swarmapi.Network, error) {
    // GetNetwork to match via full ID.
    if rg, err := c.GetNetwork(ctx, &swarmapi.GetNetworkRequest{NetworkID: input}); err == nil {
        return rg.Network, nil
    }

    // If any error (including NotFound), ListNetworks to match via ID prefix and full name.
    rl, err := c.ListNetworks(ctx, &swarmapi.ListNetworksRequest{
        Filters: &swarmapi.ListNetworksRequest_Filters{
            Names: []string{input},
        },
    })
    if err != nil || len(rl.Networks) == 0 {
        rl, err = c.ListNetworks(ctx, &swarmapi.ListNetworksRequest{
            Filters: &swarmapi.ListNetworksRequest_Filters{
                IDPrefixes: []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, errdefs.InvalidParameter(fmt.Errorf("network %s is ambiguous (%d matches found)", input, l))
    }

    return rl.Networks[0], nil
}

func getVolume(ctx context.Context, c swarmapi.ControlClient, input string) (*swarmapi.Volume, error) {
    // GetVolume to match via full ID
    if v, err := c.GetVolume(ctx, &swarmapi.GetVolumeRequest{VolumeID: input}); err == nil {
        return v.Volume, nil
    }

    // If any error (including NotFound), list volumes to match via ID prefix
    // and full name
    resp, err := c.ListVolumes(ctx, &swarmapi.ListVolumesRequest{
        Filters: &swarmapi.ListVolumesRequest_Filters{
            Names: []string{input},
        },
    })

    if err != nil || len(resp.Volumes) == 0 {
        resp, err = c.ListVolumes(ctx, &swarmapi.ListVolumesRequest{
            Filters: &swarmapi.ListVolumesRequest_Filters{
                IDPrefixes: []string{input},
            },
        })
    }
    if err != nil {
        return nil, err
    }

    if len(resp.Volumes) == 0 {
        return nil, errdefs.NotFound(fmt.Errorf("volume %s not found", input))
    }

    if l := len(resp.Volumes); l > 1 {
        return nil, errdefs.InvalidParameter(fmt.Errorf("volume %s is ambiguous (%d matches found)", input, l))
    }

    return resp.Volumes[0], nil
}