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daemon: don't listen on the same address multiple times

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Before this change:

    dockerd -H unix:///run/docker.sock -H unix:///run/docker.sock -H unix:///run/docker.sock
    ...
    INFO[2019-07-13T00:02:36.195090937Z] Daemon has completed initialization
    INFO[2019-07-13T00:02:36.215940441Z] API listen on /run/docker.sock
    INFO[2019-07-13T00:02:36.215933172Z] API listen on /run/docker.sock
    INFO[2019-07-13T00:02:36.215990566Z] API listen on /run/docker.sock

After this change:

    dockerd -H unix:///run/docker.sock -H unix:///run/docker.sock -H unix:///run/docker.sock
    ...
    INFO[2019-07-13T00:01:37.533579874Z] Daemon has completed initialization
    INFO[2019-07-13T00:01:37.567045771Z] API listen on /run/docker.sock

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2019-07-13 01:53:12 +02:00
parent 47a84dcc64
commit d470252e87
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GPG key ID: 76698F39D527CE8C
1 changed files with 6 additions and 0 deletions
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6
cmd/dockerd/daemon.go
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@ -611,11 +611,17 @@ func newAPIServerConfig(cli *DaemonCli) (*apiserver.Config, error) {
func loadListeners(cli *DaemonCli, serverConfig *apiserver.Config) ([]string, error) {
var hosts []string
seen := make(map[string]struct{}, len(cli.Config.Hosts))
for i := 0; i < len(cli.Config.Hosts); i++ {
var err error
if cli.Config.Hosts[i], err = dopts.ParseHost(cli.Config.TLS, honorXDG, cli.Config.Hosts[i]); err != nil {
return nil, errors.Wrapf(err, "error parsing -H %s", cli.Config.Hosts[i])
}
if _, ok := seen[cli.Config.Hosts[i]]; ok {
continue
}
seen[cli.Config.Hosts[i]] = struct{}{}
protoAddr := cli.Config.Hosts[i]
protoAddrParts := strings.SplitN(protoAddr, "://", 2)