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docker.go
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docker.go
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package libdocker
import (
"fmt"
"io"
"regexp"
"github.com/core-coin/hive/internal/libhive"
docker "github.com/fsouza/go-dockerclient"
"gopkg.in/inconshreveable/log15.v2"
)
// Config is the configuration of the docker backend.
type Config struct {
Inventory libhive.Inventory
Logger log15.Logger
// When building containers, any client or simulator image build matching the pattern
// will avoid the docker cache.
NoCachePattern *regexp.Regexp
// This forces pulling of base images when building clients and simulators.
PullEnabled bool
// These two are log destinations for output from docker.
ContainerOutput io.Writer
BuildOutput io.Writer
// This tells the docker client whether to authenticate requests with credential helper
UseCredentialHelper bool
}
func Connect(dockerEndpoint string, cfg *Config) (*Builder, *ContainerBackend, error) {
logger := cfg.Logger
if logger == nil {
logger = log15.Root()
}
var client *docker.Client
var err error
if dockerEndpoint == "" {
client, err = docker.NewClientFromEnv()
} else {
client, err = docker.NewClient(dockerEndpoint)
}
if err != nil {
return nil, nil, fmt.Errorf("can't connect to docker: %v", err)
}
env, err := client.Version()
if err != nil {
return nil, nil, fmt.Errorf("can't get docker version: %v", err)
}
logger.Debug("docker daemon online", "version", env.Get("Version"))
builder, err := createBuilder(client, cfg)
if err != nil {
return nil, nil, err
}
backend := NewContainerBackend(client, cfg)
return builder, backend, nil
}
func createBuilder(client *docker.Client, cfg *Config) (*Builder, error) {
var auth Authenticator
var err error
if cfg.UseCredentialHelper {
auth, err = NewCredHelperAuthenticator()
if err != nil {
return nil, err
}
}
return NewBuilder(client, cfg, auth), nil
}