64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
package namespaces
|
|
|
|
import (
|
|
"os"
|
|
|
|
"github.com/containerd/containerd/errdefs"
|
|
"github.com/pkg/errors"
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
const (
|
|
// NamespaceEnvVar is the environment variable key name
|
|
NamespaceEnvVar = "CONTAINERD_NAMESPACE"
|
|
// Default is the name of the default namespace
|
|
Default = "default"
|
|
)
|
|
|
|
type namespaceKey struct{}
|
|
|
|
// WithNamespace sets a given namespace on the context
|
|
func WithNamespace(ctx context.Context, namespace string) context.Context {
|
|
ctx = context.WithValue(ctx, namespaceKey{}, namespace) // set our key for namespace
|
|
|
|
// also store on the grpc headers so it gets picked up by any clients that
|
|
// are using this.
|
|
return withGRPCNamespaceHeader(ctx, namespace)
|
|
}
|
|
|
|
// NamespaceFromEnv uses the namespace defined in CONTAINERD_NAMESPACE or
|
|
// default
|
|
func NamespaceFromEnv(ctx context.Context) context.Context {
|
|
namespace := os.Getenv(NamespaceEnvVar)
|
|
if namespace == "" {
|
|
namespace = Default
|
|
}
|
|
return WithNamespace(ctx, namespace)
|
|
}
|
|
|
|
// Namespace returns the namespace from the context.
|
|
//
|
|
// The namespace is not guaranteed to be valid.
|
|
func Namespace(ctx context.Context) (string, bool) {
|
|
namespace, ok := ctx.Value(namespaceKey{}).(string)
|
|
if !ok {
|
|
return fromGRPCHeader(ctx)
|
|
}
|
|
|
|
return namespace, ok
|
|
}
|
|
|
|
// NamespaceRequired returns the valid namepace from the context or an error.
|
|
func NamespaceRequired(ctx context.Context) (string, error) {
|
|
namespace, ok := Namespace(ctx)
|
|
if !ok || namespace == "" {
|
|
return "", errors.Wrapf(errdefs.ErrFailedPrecondition, "namespace is required")
|
|
}
|
|
|
|
if err := Validate(namespace); err != nil {
|
|
return "", errors.Wrap(err, "namespace validation")
|
|
}
|
|
|
|
return namespace, nil
|
|
}
|