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config: add additional dns lookup families, default to V4_PREFERRED (#3957)

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This commit is contained in:
Caleb Doxsey 2023-02-10 16:29:23 -07:00 • committed by GitHub
parent e66c26c9ad
commit b50d5f3203
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5 changed files with 34 additions and 12 deletions
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3
config/envoyconfig/clusters.go
View file

@ -190,10 +190,7 @@ func (b *Builder) buildPolicyCluster(ctx context.Context, cfg *config.Config, po
return nil, err
}
if cluster.DnsLookupFamily == envoy_config_cluster_v3.Cluster_AUTO {
cluster.DnsLookupFamily = config.GetEnvoyDNSLookupFamily(options.DNSLookupFamily)
}
if policy.EnableGoogleCloudServerlessAuthentication {
cluster.DnsLookupFamily = envoy_config_cluster_v3.Cluster_V4_ONLY
}

4
config/envoyconfig/clusters_test.go
View file

@ -676,6 +676,7 @@ func Test_buildCluster(t *testing.T) {
}
}
},
"dnsLookupFamily": "V4_PREFERRED",
"loadAssignment": {
"clusterName": "example",
"endpoints": [{
@ -745,6 +746,7 @@ func Test_buildCluster(t *testing.T) {
}
}
},
"dnsLookupFamily": "V4_PREFERRED",
"loadAssignment": {
"clusterName": "example",
"endpoints": [{
@ -800,6 +802,7 @@ func Test_buildCluster(t *testing.T) {
}
}
},
"dnsLookupFamily": "V4_PREFERRED",
"loadAssignment": {
"clusterName": "example",
"endpoints": [{
@ -857,6 +860,7 @@ func Test_buildCluster(t *testing.T) {
}
}
},
"dnsLookupFamily": "V4_PREFERRED",
"loadAssignment": {
"clusterName": "example",
"endpoints": [{

2
config/envoyconfig/envoyconfig.go
View file

@ -71,7 +71,7 @@ func newDefaultEnvoyClusterConfig() *envoy_config_cluster_v3.Cluster {
return &envoy_config_cluster_v3.Cluster{
ConnectTimeout: defaultConnectionTimeout,
RespectDnsTtl: true,
DnsLookupFamily: envoy_config_cluster_v3.Cluster_AUTO,
DnsLookupFamily: envoy_config_cluster_v3.Cluster_V4_PREFERRED,
PerConnectionBufferLimitBytes: wrapperspb.UInt32(connectionBufferLimit),
}
}

2
config/options.go
View file

@ -83,7 +83,7 @@ type Options struct {
InsecureServer bool `mapstructure:"insecure_server" yaml:"insecure_server,omitempty"`
// DNSLookupFamily is the DNS IP address resolution policy.
// If this setting is not specified, the value defaults to AUTO.
// If this setting is not specified, the value defaults to V4_PREFERRED.
DNSLookupFamily string `mapstructure:"dns_lookup_family" yaml:"dns_lookup_family,omitempty"`
CertificateFiles []certificateFilePair `mapstructure:"certificates" yaml:"certificates,omitempty"`

27
config/validate.go
View file

@ -14,15 +14,28 @@ const (
DNSLookupFamilyAuto = "AUTO"
DNSLookupFamilyV4Only = "V4_ONLY"
DNSLookupFamilyV6Only = "V6_ONLY"
DNSLookupFamilyV4Preferred = "V4_PREFERRED"
DNSLookupFamilyAll = "ALL"
)
// AllDNSLookupFamilies are all the available DNSLookupFamily values.
var AllDNSLookupFamilies = []string{DNSLookupFamilyV6Only, DNSLookupFamilyV4Only, DNSLookupFamilyAuto}
var AllDNSLookupFamilies = []string{
DNSLookupFamilyAuto,
DNSLookupFamilyV4Only,
DNSLookupFamilyV6Only,
DNSLookupFamilyV4Preferred,
DNSLookupFamilyAll,
}
// ValidateDNSLookupFamily validates the value to confirm its one of the available DNS lookup families.
func ValidateDNSLookupFamily(value string) error {
switch value {
case "", DNSLookupFamilyAuto, DNSLookupFamilyV4Only, DNSLookupFamilyV6Only:
case "",
DNSLookupFamilyAuto,
DNSLookupFamilyV4Only,
DNSLookupFamilyV6Only,
DNSLookupFamilyV4Preferred,
DNSLookupFamilyAll:
return nil
}
@ -32,12 +45,20 @@ func ValidateDNSLookupFamily(value string) error {
// GetEnvoyDNSLookupFamily gets the envoy DNS lookup family.
func GetEnvoyDNSLookupFamily(value string) envoy_config_cluster_v3.Cluster_DnsLookupFamily {
switch value {
case DNSLookupFamilyAuto:
return envoy_config_cluster_v3.Cluster_AUTO
case DNSLookupFamilyV4Only:
return envoy_config_cluster_v3.Cluster_V4_ONLY
case DNSLookupFamilyV6Only:
return envoy_config_cluster_v3.Cluster_V6_ONLY
case DNSLookupFamilyV4Preferred:
return envoy_config_cluster_v3.Cluster_V4_PREFERRED
case DNSLookupFamilyAll:
return envoy_config_cluster_v3.Cluster_ALL
}
return envoy_config_cluster_v3.Cluster_AUTO
// default
return envoy_config_cluster_v3.Cluster_V4_PREFERRED
}
// ValidateMetricsAddress validates address for the metrics