49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
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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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// 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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// inadvertantly 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 bindAddr == "0.0.0.0" {
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privateIP, err := sockaddr.GetPrivateIP()
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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.Wrap(err, "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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