dotcloud/docker

package client // import "github.com/docker/docker/client"

import (
    "context"
    "io"
    "net/url"
    "time"

    "github.com/docker/docker/api/types/container"
    timetypes "github.com/docker/docker/api/types/time"
    "github.com/pkg/errors"
)

// ServiceLogs returns the logs generated by a service in an io.ReadCloser.
// It's up to the caller to close the stream.
func (cli *Client) ServiceLogs(ctx context.Context, serviceID string, options container.LogsOptions) (io.ReadCloser, error) {
    query := url.Values{}
    if options.ShowStdout {
        query.Set("stdout", "1")
    }

    if options.ShowStderr {
        query.Set("stderr", "1")
    }

    if options.Since != "" {
        ts, err := timetypes.GetTimestamp(options.Since, time.Now())
        if err != nil {
            return nil, errors.Wrap(err, `invalid value for "since"`)
        }
        query.Set("since", ts)
    }

    if options.Timestamps {
        query.Set("timestamps", "1")
    }

    if options.Details {
        query.Set("details", "1")
    }

    if options.Follow {
        query.Set("follow", "1")
    }
    query.Set("tail", options.Tail)

    resp, err := cli.get(ctx, "/services/"+serviceID+"/logs", query, nil)
    if err != nil {
        return nil, err
    }
    return resp.body, nil
}