Add the ability to disable sigv4

sigv4/disabled.go

@@ -0,0 +1,40 @@
+// Copyright 2022 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build noaws
+// +build noaws
+
+package sigv4
+
+import (
+	"errors"
+	"net/http"
+)
+
+// NewSigV4RoundTripper returns an error when a new RoundTripper is created.
+func NewSigV4RoundTripper(cfg *SigV4Config, next http.RoundTripper) (http.RoundTripper, error) {
+	return nil, errors.New("sigv4 support has been disabled in this build")
+}
+
+// SigV4Config is the configuration for signing remote write requests with
+// AWS's SigV4 verification process.
+type SigV4Config struct {
+}
+
+func (c *SigV4Config) Validate() error {
+	return errors.New("sigv4 support has been disabled in this build")
+}
+
+func (c *SigV4Config) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	return c.Validate()
+}

sigv4/sigv4.go

@@ -11,6 +11,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !noaws
+// +build !noaws
+
 package sigv4
 
 import (

sigv4/sigv4_config.go

@@ -11,6 +11,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !noaws
+// +build !noaws
+
 package sigv4
 
 import (

sigv4/sigv4_test.go

@@ -11,6 +11,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !noaws
+// +build !noaws
+
 package sigv4
 
 import (