/
image.go
116 lines (92 loc) · 2.56 KB
/
image.go
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package runtime
import (
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/registry"
log "github.com/hashicorp/go-hclog"
docker "github.com/wabenet/dodo-docker/pkg/client"
"golang.org/x/net/context"
)
func (c *ContainerRuntime) ResolveImage(name string) (string, error) {
log.L().Debug("trying to find image", "name", name)
ref, err := reference.ParseAnyReference(name)
if err != nil {
return "", fmt.Errorf("could not parse image name: %w", err)
}
client, err := c.ensureClient()
if err != nil {
return "", err
}
if _, _, err := client.ImageInspectWithRaw(context.Background(), ref.String()); err == nil {
log.L().Debug("found image locally", "ref", ref.String())
return ref.String(), nil
}
parsed, err := reference.ParseNormalizedNamed(name)
if err != nil {
return "", fmt.Errorf("could not parse image name: %w", err)
}
if reference.IsNameOnly(parsed) {
parsed = reference.TagNameOnly(parsed)
}
repoInfo, err := registry.ParseRepositoryInfo(parsed)
if err != nil {
return "", fmt.Errorf("could not parse image name: %w", err)
}
configKey := repoInfo.Index.Name
if repoInfo.Index.Official {
info, err := client.Info(context.Background())
if err != nil && info.IndexServerAddress != "" {
configKey = info.IndexServerAddress
} else {
configKey = registry.IndexServer
}
}
authConfigs := docker.LoadAuthConfig()
buf, err := json.Marshal(authConfigs[configKey])
if err != nil {
return "", fmt.Errorf("could not parse auth config: %w", err)
}
response, err := client.ImagePull(
context.Background(),
parsed.String(),
types.ImagePullOptions{
RegistryAuth: base64.URLEncoding.EncodeToString(buf),
},
)
if err != nil {
return "", fmt.Errorf("could not pull image: %w", err)
}
defer response.Close()
if err = streamPull(response); err != nil {
return "", fmt.Errorf("error during container stream: %w", err)
}
return parsed.String(), nil
}
func streamPull(result io.Reader) error {
decoder := json.NewDecoder(result)
for {
var msg jsonmessage.JSONMessage
if err := decoder.Decode(&msg); err != nil {
if errors.Is(err, io.EOF) {
break
}
return fmt.Errorf("invalid json: %w", err)
}
if msg.Error != nil {
return msg.Error
}
if msg.Progress != nil || msg.ProgressMessage != "" {
continue
}
if msg.Stream != "" || msg.Status != "" {
log.L().Info("pull stream", "status", msg.Status, "stream", msg.Stream)
}
}
return nil
}