MINOR: Add configuration option for preferred Time suffix

This option controls how dataplaneapi will serialize Time values when
writing the HAProxy configuration file. By default, it will use the most
appropriate time unit.

Possible values: nearest (the default), none, ms, s, m, h, d. Please
consult the HAProxy documentation for the meaning of each suffix.

If you choose 'none', then Time values will be written as milliseconds
without any suffix, which can be useful for backward compatibility.

Author: oliwer

client-native/cn.go

@@ -36,6 +36,7 @@ func ConfigureConfigurationClient(haproxyOptions dataplaneapi_config.HAProxyConf
 		configuration_options.ValidateCmd(haproxyOptions.ValidateCmd),
 		configuration_options.MasterWorker,
 		configuration_options.UseMd5Hash,
+		configuration_options.PreferredTimeSuffix(haproxyOptions.PreferredTimeSuffix),
 	)
 	if err != nil {
 		return nil, fmt.Errorf("error setting up configuration client: %s", err.Error())

configuration/configuration.go

@@ -60,6 +60,7 @@ type HAProxyConfiguration struct {
 	GeneralStorageDir    string        `long:"general-storage-dir" description:"Path to general storage directory" default:"/etc/haproxy/general" group:"resources"`
 	ClusterTLSCertDir    string        `long:"cluster-tls-dir" description:"Path where cluster tls certificates will be stored. Defaults to same directory as dataplane configuration file" group:"cluster"`
 	DataplaneStorageDir  string        `long:"dataplane-storage-dir" description:"Path to dataplane internal storage directory" default:"/etc/haproxy/dataplane" group:"resources"`
+	PreferredTimeSuffix  string        `long:"time-suffix" description:"Preferred time unit to use when writing time values in configuration (nearest, none, ms, s, m, h, d)" default:"nearest" group:"haproxy"`
 	UpdateMapFilesPeriod int64         `long:"update-map-files-period" description:"Elapsed time in seconds between two maps syncing operations" default:"10" group:"resources"`
 	ReloadDelay          int           `short:"d" long:"reload-delay" description:"Minimum delay between two reloads (in s)" default:"5" group:"reload"`
 	MaxOpenTransactions  int64         `long:"max-open-transactions" description:"Limit for active transaction in pending state" default:"20" group:"transaction"`