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https://github.com/prometheus-community/elasticsearch_exporter.git
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00dfe058f4
This should help when PRs are open through a year change. These dates aren't necessary and the CNCF does not recommend keeping them. https://github.com/cncf/foundation/blob/main/copyright-notices.md Signed-off-by: Joe Adams <github@joeadams.io>
70 lines
2.2 KiB
Go
70 lines
2.2 KiB
Go
// Copyright The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"crypto/tls"
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"crypto/x509"
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"log"
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"os"
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)
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func createTLSConfig(pemFile, pemCertFile, pemPrivateKeyFile string, insecureSkipVerify bool) *tls.Config {
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tlsConfig := tls.Config{}
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if insecureSkipVerify {
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// pem settings are irrelevant if we're skipping verification anyway
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tlsConfig.InsecureSkipVerify = true
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}
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if len(pemFile) > 0 {
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rootCerts, err := loadCertificatesFrom(pemFile)
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if err != nil {
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log.Fatalf("Couldn't load root certificate from %s. Got %s.", pemFile, err)
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return nil
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}
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tlsConfig.RootCAs = rootCerts
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}
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if len(pemCertFile) > 0 && len(pemPrivateKeyFile) > 0 {
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// Load files once to catch configuration error early.
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_, err := loadPrivateKeyFrom(pemCertFile, pemPrivateKeyFile)
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if err != nil {
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log.Fatalf("Couldn't setup client authentication. Got %s.", err)
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return nil
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}
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// Define a function to load certificate and key lazily at TLS handshake to
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// ensure that the latest files are used in case they have been rotated.
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tlsConfig.GetClientCertificate = func(*tls.CertificateRequestInfo) (*tls.Certificate, error) {
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return loadPrivateKeyFrom(pemCertFile, pemPrivateKeyFile)
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}
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}
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return &tlsConfig
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}
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func loadCertificatesFrom(pemFile string) (*x509.CertPool, error) {
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caCert, err := os.ReadFile(pemFile)
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if err != nil {
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return nil, err
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}
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certificates := x509.NewCertPool()
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certificates.AppendCertsFromPEM(caCert)
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return certificates, nil
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}
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func loadPrivateKeyFrom(pemCertFile, pemPrivateKeyFile string) (*tls.Certificate, error) {
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privateKey, err := tls.LoadX509KeyPair(pemCertFile, pemPrivateKeyFile)
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if err != nil {
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return nil, err
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}
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return &privateKey, nil
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}
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