From 0b23a478cf00684af19e3ce875bb5bcbf3bf853d Mon Sep 17 00:00:00 2001 From: Manuel Buil Date: Wed, 20 Sep 2023 12:00:31 +0200 Subject: [PATCH] ipFamilyPolicy:PreferDualStack for coredns and metrics-server Signed-off-by: Manuel Buil --- manifests/coredns.yaml | 2 + .../metrics-server-service.yaml | 1 + pkg/cli/server/server.go | 38 +++++++------------ pkg/deploy/zz_generated_bindata.go | 4 +- pkg/server/server.go | 8 ++++ 5 files changed, 27 insertions(+), 26 deletions(-) diff --git a/manifests/coredns.yaml b/manifests/coredns.yaml index cd7d3a736b..469ee9041d 100644 --- a/manifests/coredns.yaml +++ b/manifests/coredns.yaml @@ -205,6 +205,7 @@ spec: selector: k8s-app: kube-dns clusterIP: %{CLUSTER_DNS}% + clusterIPs: %{CLUSTER_DNS_LIST}% ports: - name: dns port: 53 @@ -215,3 +216,4 @@ spec: - name: metrics port: 9153 protocol: TCP + ipFamilyPolicy: %{CLUSTER_DNS_IPFAMILYPOLICY}% diff --git a/manifests/metrics-server/metrics-server-service.yaml b/manifests/metrics-server/metrics-server-service.yaml index f89a885ef0..ec24e64590 100644 --- a/manifests/metrics-server/metrics-server-service.yaml +++ b/manifests/metrics-server/metrics-server-service.yaml @@ -15,3 +15,4 @@ spec: name: https protocol: TCP targetPort: https + ipFamilyPolicy: PreferDualStack diff --git a/pkg/cli/server/server.go b/pkg/cli/server/server.go index 3fbc3fe973..185eb88aed 100644 --- a/pkg/cli/server/server.go +++ b/pkg/cli/server/server.go @@ -364,12 +364,13 @@ func run(app *cli.Context, cfg *cmds.Server, leaderControllers server.CustomCont // If there are no IPv4 ServiceCIDRs, an IPv6 ServiceCIDRs will be used. // If neither of IPv4 or IPv6 are found an error is raised. if len(cmds.ServerConfig.ClusterDNS) == 0 { - clusterDNS, err := utilsnet.GetIndexedIP(serverConfig.ControlConfig.ServiceIPRange, 10) - if err != nil { - return errors.Wrap(err, "cannot configure default cluster-dns address") + for _, svcCIDR := range serverConfig.ControlConfig.ServiceIPRanges { + clusterDNS, err := utilsnet.GetIndexedIP(svcCIDR, 10) + if err != nil { + return errors.Wrap(err, "cannot configure default cluster-dns address") + } + serverConfig.ControlConfig.ClusterDNSs = append(serverConfig.ControlConfig.ClusterDNSs, clusterDNS) } - serverConfig.ControlConfig.ClusterDNS = clusterDNS - serverConfig.ControlConfig.ClusterDNSs = []net.IP{serverConfig.ControlConfig.ClusterDNS} } else { for _, ip := range util.SplitStringSlice(cmds.ServerConfig.ClusterDNS) { parsed := net.ParseIP(ip) @@ -378,15 +379,16 @@ func run(app *cli.Context, cfg *cmds.Server, leaderControllers server.CustomCont } serverConfig.ControlConfig.ClusterDNSs = append(serverConfig.ControlConfig.ClusterDNSs, parsed) } - // Set ClusterDNS to the first IPv4 address, for legacy clients - // unless only IPv6 range given - clusterDNS, _, _, err := util.GetFirstIP(serverConfig.ControlConfig.ClusterDNSs) - if err != nil { - return errors.Wrap(err, "cannot configure IPv4/IPv6 cluster-dns address") - } - serverConfig.ControlConfig.ClusterDNS = clusterDNS } + // Set ClusterDNS to the first IPv4 address, for legacy clients + // unless only IPv6 range given + clusterDNS, _, _, err := util.GetFirstIP(serverConfig.ControlConfig.ClusterDNSs) + if err != nil { + return errors.Wrap(err, "cannot configure IPv4/IPv6 cluster-dns address") + } + serverConfig.ControlConfig.ClusterDNS = clusterDNS + if err := validateNetworkConfiguration(serverConfig); err != nil { return err } @@ -577,18 +579,6 @@ func run(app *cli.Context, cfg *cmds.Server, leaderControllers server.CustomCont // validateNetworkConfig ensures that the network configuration values make sense. func validateNetworkConfiguration(serverConfig server.Config) error { - // Dual-stack operation requires fairly extensive manual configuration at the moment - do some - // preflight checks to make sure that the user isn't trying to use flannel/npc, or trying to - // enable dual-stack DNS (which we don't currently support since it's not easy to template) - dualDNS, err := utilsnet.IsDualStackIPs(serverConfig.ControlConfig.ClusterDNSs) - if err != nil { - return errors.Wrap(err, "failed to validate cluster-dns") - } - - if dualDNS == true { - return errors.New("dual-stack cluster-dns is not supported") - } - switch serverConfig.ControlConfig.EgressSelectorMode { case config.EgressSelectorModeCluster, config.EgressSelectorModePod: case config.EgressSelectorModeAgent, config.EgressSelectorModeDisabled: diff --git a/pkg/deploy/zz_generated_bindata.go b/pkg/deploy/zz_generated_bindata.go index 74d52de6b9..1e4a5e8f1a 100644 --- a/pkg/deploy/zz_generated_bindata.go +++ b/pkg/deploy/zz_generated_bindata.go @@ -111,7 +111,7 @@ func ccmYaml() (*asset, error) { return a, nil } -var _corednsYaml = 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+var _corednsYaml = 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func corednsYamlBytes() ([]byte, error) { return bindataRead( @@ -251,7 +251,7 @@ func metricsServerMetricsServerDeploymentYaml() (*asset, error) { return a, nil } -var _metricsServerMetricsServerServiceYaml = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x6c\x8e\x3f\x4b\x04\x31\x10\xc5\xfb\x7c\x8a\x61\xfb\x28\xe2\x15\x92\xd6\x5a\x38\x50\xec\xe7\x72\x0f\x0d\x97\x4d\xc2\xcc\xec\x82\xdf\x5e\x76\xf6\x9a\x83\xed\x92\x37\xef\xcf\x2f\xc6\x18\x78\x94\x6f\x88\x96\xde\x12\xad\x2f\xe1\x56\xda\x35\xd1\x27\x64\x2d\x19\x61\x86\xf1\x95\x8d\x53\x20\x6a\x3c\x23\xd1\x0c\x93\x92\x35\x2a\x64\x85\xdc\x65\x1d\x9c\x91\xe8\xb6\x5c\x10\xf5\x4f\x0d\x73\x20\xaa\x7c\x41\xd5\x2d\x49\x7e\x91\x06\x83\x3e\x95\xfe\xbc\x37\x4d\x1f\x0f\x55\xd3\x81\x31\xd7\x45\x0d\xe2\x8e\xb2\x2d\x4c\x26\x0b\xa6\xa0\x03\x79\x2b\x56\x54\x64\xeb\x72\x1f\x79\xd3\xc8\x63\x1c\x30\x8e\x2e\xe6\x24\xd1\x9f\x89\x4e\xa7\x57\x8f\xec\x24\xbf\x66\x43\xfd\x3f\xa4\x5b\xcf\xbd\x26\xfa\x7a\x3f\xbb\x62\x2c\x3f\xb0\xb3\xa7\x76\xdf\x7f\x00\x00\x00\xff\xff\x7e\x3b\x1f\x83\x35\x01\x00\x00") +var _metricsServerMetricsServerServiceYaml = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x6c\x8e\x3f\x4b\x04\x31\x10\xc5\xfb\x7c\x8a\x61\xfb\x28\xe2\x15\x92\x56\xb1\x13\x16\x4e\xec\xe7\x72\x4f\x0d\x9b\x6c\xc2\xcc\xec\xc2\x7e\x7b\xd9\xdc\x59\x1c\x5c\x97\xbc\x79\x7f\x7e\xde\x7b\xc7\x2d\x7d\x41\x34\xd5\x39\xd0\xfa\xe4\xa6\x34\x9f\x03\x1d\x21\x6b\x8a\x70\x05\xc6\x67\x36\x0e\x8e\x68\xe6\x82\x40\x05\x26\x29\xaa\x57\xc8\x0a\xb9\xca\xda\x38\x22\xd0\xb4\x9c\xe0\x75\x53\x43\x71\x44\x99\x4f\xc8\xba\x27\xa9\x5f\x64\x86\x41\x1f\x52\x7d\xbc\x34\x0d\x1f\x37\x55\xc3\x1d\x63\xcc\x8b\x1a\xa4\x3b\xd2\xbe\x30\x98\x2c\x18\x9c\x36\xc4\xbd\x58\x91\x11\xad\xca\x75\xe4\x45\x3d\xb7\x76\x87\xb1\x55\xb1\x4e\xe2\xfb\x33\xd0\xe1\xf0\xdc\x23\x17\x92\x5f\xb3\xa6\xfd\xdf\xa4\x5a\x8d\x35\x07\xfa\x7c\x1d\xbb\x62\x2c\x3f\xb0\xb1\xa7\xfe\x7d\xa9\xbd\x73\x49\x79\x1b\x6b\x4e\x71\x0b\x34\x0a\xbe\x21\x6f\x0b\xe7\xa3\x71\x9c\xdc\x5f\x00\x00\x00\xff\xff\x7b\xf5\x71\x2a\x57\x01\x00\x00") func metricsServerMetricsServerServiceYamlBytes() ([]byte, error) { return bindataRead( diff --git a/pkg/server/server.go b/pkg/server/server.go index 7ec83660b4..2734f6ed51 100644 --- a/pkg/server/server.go +++ b/pkg/server/server.go @@ -272,8 +272,16 @@ func stageFiles(ctx context.Context, sc *Context, controlConfig *config.Control) return err } dataDir = filepath.Join(controlConfig.DataDir, "manifests") + + dnsIPFamilyPolicy := "PreferDualStack" + if len(controlConfig.ClusterDNSs) == 1 { + dnsIPFamilyPolicy = "SingleStack" + } + templateVars := map[string]string{ "%{CLUSTER_DNS}%": controlConfig.ClusterDNS.String(), + "%{CLUSTER_DNS_LIST}%": fmt.Sprintf("[%s]", util.JoinIPs(controlConfig.ClusterDNSs)), + "%{CLUSTER_DNS_IPFAMILYPOLICY}%": dnsIPFamilyPolicy, "%{CLUSTER_DOMAIN}%": controlConfig.ClusterDomain, "%{DEFAULT_LOCAL_STORAGE_PATH}%": controlConfig.DefaultLocalStoragePath, "%{SYSTEM_DEFAULT_REGISTRY}%": registryTemplate(controlConfig.SystemDefaultRegistry),