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moby--moby/graph/import.go
Doug Davis 26b1064967 Add context.RequestID to event stream
This PR adds a "request ID" to each event generated, the 'docker events'
stream now looks like this:

```
2015-09-10T15:02:50.000000000-07:00 [reqid: c01e3534ddca] de7c5d4ca927253cf4e978ee9c4545161e406e9b5a14617efb52c658b249174a: (from ubuntu) create
```
Note the `[reqID: c01e3534ddca]` part, that's new.

Each HTTP request will generate its own unique ID. So, if you do a
`docker build` you'll see a series of events all with the same reqID.
This allow for log processing tools to determine which events are all related
to the same http request.

I didn't propigate the context to all possible funcs in the daemon,
I decided to just do the ones that needed it in order to get the reqID
into the events. I'd like to have people review this direction first, and
if we're ok with it then I'll make sure we're consistent about when
we pass around the context - IOW, make sure that all funcs at the same level
have a context passed in even if they don't call the log funcs - this will
ensure we're consistent w/o passing it around for all calls unnecessarily.

ping @icecrime @calavera @crosbymichael

Signed-off-by: Doug Davis <dug@us.ibm.com>
2015-09-24 11:56:37 -07:00

80 lines
2 KiB
Go

package graph
import (
"io"
"net/http"
"net/url"
"github.com/docker/docker/context"
"github.com/docker/docker/pkg/httputils"
"github.com/docker/docker/pkg/progressreader"
"github.com/docker/docker/pkg/streamformatter"
"github.com/docker/docker/runconfig"
"github.com/docker/docker/utils"
)
// Import imports an image, getting the archived layer data either from
// inConfig (if src is "-"), or from a URI specified in src. Progress output is
// written to outStream. Repository and tag names can optionally be given in
// the repo and tag arguments, respectively.
func (s *TagStore) Import(ctx context.Context, src string, repo string, tag string, msg string, inConfig io.ReadCloser, outStream io.Writer, containerConfig *runconfig.Config) error {
var (
sf = streamformatter.NewJSONStreamFormatter()
archive io.ReadCloser
resp *http.Response
)
if src == "-" {
archive = inConfig
} else {
inConfig.Close()
u, err := url.Parse(src)
if err != nil {
return err
}
if u.Scheme == "" {
u.Scheme = "http"
u.Host = src
u.Path = ""
}
outStream.Write(sf.FormatStatus("", "Downloading from %s", u))
resp, err = httputils.Download(u.String())
if err != nil {
return err
}
progressReader := progressreader.New(progressreader.Config{
In: resp.Body,
Out: outStream,
Formatter: sf,
Size: resp.ContentLength,
NewLines: true,
ID: "",
Action: "Importing",
})
archive = progressReader
}
defer archive.Close()
if len(msg) == 0 {
msg = "Imported from " + src
}
img, err := s.graph.Create(archive, "", "", msg, "", nil, containerConfig)
if err != nil {
return err
}
// Optionally register the image at REPO/TAG
if repo != "" {
if err := s.Tag(repo, tag, img.ID, true); err != nil {
return err
}
}
outStream.Write(sf.FormatStatus("", img.ID))
logID := img.ID
if tag != "" {
logID = utils.ImageReference(logID, tag)
}
s.eventsService.Log(ctx, "import", logID, "")
return nil
}