mirror of
https://github.com/prometheus/alertmanager
synced 2024-12-23 22:53:27 +00:00
67 lines
2.1 KiB
Go
67 lines
2.1 KiB
Go
// Copyright 2018 Prometheus Team
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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 cluster
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import (
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"net"
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"github.com/hashicorp/go-sockaddr"
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"github.com/pkg/errors"
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)
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type getPrivateIPFunc func() (string, error)
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// This is overridden in unit tests to mock the sockaddr.GetPrivateIP function.
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var getPrivateAddress getPrivateIPFunc = sockaddr.GetPrivateIP
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// calculateAdvertiseAddress attempts to clone logic from deep within memberlist
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// (NetTransport.FinalAdvertiseAddr) in order to surface its conclusions to the
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// application, so we can provide more actionable error messages if the user has
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// inadvertently misconfigured their cluster.
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//
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// https://github.com/hashicorp/memberlist/blob/022f081/net_transport.go#L126
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func calculateAdvertiseAddress(bindAddr, advertiseAddr string) (net.IP, error) {
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if advertiseAddr != "" {
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ip := net.ParseIP(advertiseAddr)
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if ip == nil {
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return nil, errors.Errorf("failed to parse advertise addr '%s'", advertiseAddr)
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}
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if ip4 := ip.To4(); ip4 != nil {
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ip = ip4
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}
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return ip, nil
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}
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if isAny(bindAddr) {
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privateIP, err := getPrivateAddress()
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if err != nil {
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return nil, errors.Wrap(err, "failed to get private IP")
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}
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if privateIP == "" {
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return nil, errors.New("no private IP found, explicit advertise addr not provided")
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}
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ip := net.ParseIP(privateIP)
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if ip == nil {
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return nil, errors.Errorf("failed to parse private IP '%s'", privateIP)
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}
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return ip, nil
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}
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ip := net.ParseIP(bindAddr)
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if ip == nil {
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return nil, errors.Errorf("failed to parse bind addr '%s'", bindAddr)
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}
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return ip, nil
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}
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