mirror of
https://github.com/ceph/ceph-csi.git
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53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
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/*
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Copyright 2018 The Kubernetes 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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package metrics
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import (
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"fmt"
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"net"
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logf "sigs.k8s.io/controller-runtime/pkg/internal/log"
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)
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var log = logf.RuntimeLog.WithName("metrics")
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// DefaultBindAddress sets the default bind address for the metrics listener
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// The metrics is on by default.
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var DefaultBindAddress = ":8080"
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// NewListener creates a new TCP listener bound to the given address.
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func NewListener(addr string) (net.Listener, error) {
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if addr == "" {
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// If the metrics bind address is empty, default to ":8080"
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addr = DefaultBindAddress
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}
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// Add a case to disable metrics altogether
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if addr == "0" {
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return nil, nil
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}
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log.Info("metrics server is starting to listen", "addr", addr)
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ln, err := net.Listen("tcp", addr)
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if err != nil {
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er := fmt.Errorf("error listening on %s: %w", addr, err)
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log.Error(er, "metrics server failed to listen. You may want to disable the metrics server or use another port if it is due to conflicts")
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return nil, er
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}
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return ln, nil
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}
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