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Merge pull request #62947 from fabriziopandini/kubeadm-ha-ControlPlaneEndpoint2

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Automatic merge from submit-queue (batch tested with PRs 62464, 62947). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

make API.ControlPlaneEndpoint accept IP

**What this PR does / why we need it**:
This PR implements one of the actions defined by https://github.com/kubernetes/kubeadm/issues/751 (checklist form implementing HA in kubeadm).

With this PR, the `API.ControlPlaneEndpoint` value in the kubeadm MasterConfiguration file now accepts both DNS and IP.

The `API.ControlPlaneEndpoint` should be used to set a stable IP address for the control plane; in an HA configuration, this should be the load balancer address (no matter if identified by a DNS name or by a stable IP).

**Special notes for your reviewer**:
/CC @timothysc 
This PR is the same of https://github.com/kubernetes/kubernetes/pull/62667, that I closed by error 😥

**Release note**:
```release-note
NONE
```
Nb. first https://github.com/kubernetes/kubernetes/pull/62667 already has the release note
This commit is contained in:
Kubernetes Submit Queue 2018-04-23 16:42:06 -07:00 committed by GitHub
commit d23ad1f894
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9 changed files with 531 additions and 313 deletions
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12
cmd/kubeadm/app/apis/kubeadm/types.go
View File

@ -133,7 +133,17 @@ type MasterConfiguration struct {
type API struct {
// AdvertiseAddress sets the IP address for the API server to advertise.
AdvertiseAddress string
// ControlPlaneEndpoint sets the DNS address with optional port for the API server
// ControlPlaneEndpoint sets a stable IP address or DNS name for the control plane; it
// can be a valid IP address or a RFC-1123 DNS subdomain, both with optional TCP port.
// In case the ControlPlaneEndpoint is not specified, the AdvertiseAddress + BindPort
// are used; in case the ControlPlaneEndpoint is specified but without a TCP port,
// the BindPort is used.
// Possible usages are:
// e.g. In an cluster with more than one control plane instances, this field should be
// assigned the address of the external load balancer in front of the
// control plane instances.
// e.g. in environments with enforced node recycling, the ControlPlaneEndpoint
// could be used for assigning a stable DNS to the control plane.
ControlPlaneEndpoint string
// BindPort sets the secure port for the API Server to bind to.
// Defaults to 6443.

12
cmd/kubeadm/app/apis/kubeadm/v1alpha1/types.go
View File

@ -125,7 +125,17 @@ type MasterConfiguration struct {
type API struct {
// AdvertiseAddress sets the IP address for the API server to advertise.
AdvertiseAddress string `json:"advertiseAddress"`
// ControlPlaneEndpoint sets the DNS address for the API server
// ControlPlaneEndpoint sets a stable IP address or DNS name for the control plane; it
// can be a valid IP address or a RFC-1123 DNS subdomain, both with optional TCP port.
// In case the ControlPlaneEndpoint is not specified, the AdvertiseAddress + BindPort
// are used; in case the ControlPlaneEndpoint is specified but without a TCP port,
// the BindPort is used.
// Possible usages are:
// e.g. In an cluster with more than one control plane instances, this field should be
// assigned the address of the external load balancer in front of the
// control plane instances.
// e.g. in environments with enforced node recycling, the ControlPlaneEndpoint
// could be used for assigning a stable DNS to the control plane.
ControlPlaneEndpoint string `json:"controlPlaneEndpoint"`
// BindPort sets the secure port for the API Server to bind to.
// Defaults to 6443.

120
cmd/kubeadm/app/apis/kubeadm/validation/validation_test.go
View File

@ -275,7 +275,73 @@ func TestValidateAPIEndpoint(t *testing.T) {
expected: false,
},
{
name: "Valid IPv4 address and default port",
name: "Valid DNS ControlPlaneEndpoint (with port), AdvertiseAddress and default port",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "cp.k8s.io:8081",
AdvertiseAddress: "4.5.6.7",
BindPort: 6443,
},
},
expected: true,
},
{
name: "Valid IPv4 ControlPlaneEndpoint (with port), AdvertiseAddress and default port",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "1.2.3.4:8081",
AdvertiseAddress: "4.5.6.7",
BindPort: 6443,
},
},
expected: true,
},
{
name: "Valid IPv6 ControlPlaneEndpoint (with port), ControlPlaneEndpoint and port",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "[2001:db7::1]:8081",
AdvertiseAddress: "2001:db7::2",
BindPort: 6443,
},
},
expected: true,
},
{
name: "Valid DNS ControlPlaneEndpoint (without port), AdvertiseAddress and default port",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "cp.k8s.io",
AdvertiseAddress: "4.5.6.7",
BindPort: 6443,
},
},
expected: true,
},
{
name: "Valid IPv4 ControlPlaneEndpoint (without port), AdvertiseAddress and default port",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "1.2.3.4",
AdvertiseAddress: "4.5.6.7",
BindPort: 6443,
},
},
expected: true,
},
{
name: "Valid IPv6 ControlPlaneEndpoint (without port), ControlPlaneEndpoint and port",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "2001:db7::1",
AdvertiseAddress: "2001:db7::2",
BindPort: 6443,
},
},
expected: true,
},
{
name: "Valid IPv4 AdvertiseAddress and default port",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
AdvertiseAddress: "1.2.3.4",
@ -285,7 +351,7 @@ func TestValidateAPIEndpoint(t *testing.T) {
expected: true,
},
{
name: "Valid IPv6 address and port",
name: "Valid IPv6 AdvertiseAddress and port",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
AdvertiseAddress: "2001:db7::1",
@ -295,7 +361,7 @@ func TestValidateAPIEndpoint(t *testing.T) {
expected: true,
},
{
name: "Invalid IPv4 address",
name: "Invalid IPv4 AdvertiseAddress",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
AdvertiseAddress: "1.2.34",
@ -305,7 +371,7 @@ func TestValidateAPIEndpoint(t *testing.T) {
expected: false,
},
{
name: "Invalid IPv6 address",
name: "Invalid IPv6 AdvertiseAddress",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
AdvertiseAddress: "2001:db7:1",
@ -314,6 +380,52 @@ func TestValidateAPIEndpoint(t *testing.T) {
},
expected: false,
},
{
name: "Invalid BindPort",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
AdvertiseAddress: "1.2.3.4",
BindPort: 0,
},
},
expected: false,
},
{
name: "Invalid DNS ControlPlaneEndpoint",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "bad!!.k8s.io",
},
},
expected: false,
},
{
name: "Invalid ipv4 ControlPlaneEndpoint",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "1..3.4",
},
},
expected: false,
},
{
name: "Invalid ipv6 ControlPlaneEndpoint",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "1200::AB00:1234::2552:7777:1313",
},
},
expected: false,
},
{
name: "Invalid ControlPlaneEndpoint port",
s: &kubeadm.MasterConfiguration{
API: kubeadm.API{
ControlPlaneEndpoint: "1.2.3.4:0",
},
},
expected: false,
},
}
for _, rt := range tests {
actual := ValidateAPIEndpoint(&rt.s.API, nil)

1
cmd/kubeadm/app/phases/certs/pkiutil/BUILD
View File

@ -23,6 +23,7 @@ go_library(
deps = [
"//cmd/kubeadm/app/apis/kubeadm:go_default_library",
"//cmd/kubeadm/app/constants:go_default_library",
"//cmd/kubeadm/app/util:go_default_library",
"//pkg/registry/core/service/ipallocator:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/util/validation:go_default_library",
"//vendor/k8s.io/client-go/util/cert:go_default_library",

13
cmd/kubeadm/app/phases/certs/pkiutil/pki_helpers.go
View File

@ -29,6 +29,7 @@ import (
certutil "k8s.io/client-go/util/cert"
kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
"k8s.io/kubernetes/pkg/registry/core/service/ipallocator"
)
@ -286,9 +287,17 @@ func GetAPIServerAltNames(cfg *kubeadmapi.MasterConfiguration) (*certutil.AltNam
},
}
// add api server dns advertise address
// add api server controlPlaneEndpoint if present (dns or ip)
if len(cfg.API.ControlPlaneEndpoint) > 0 {
altNames.DNSNames = append(altNames.DNSNames, cfg.API.ControlPlaneEndpoint)
if host, _, err := kubeadmutil.ParseHostPort(cfg.API.ControlPlaneEndpoint); err == nil {
if ip := net.ParseIP(host); ip != nil {
altNames.IPs = append(altNames.IPs, ip)
} else {
altNames.DNSNames = append(altNames.DNSNames, host)
}
} else {
return nil, fmt.Errorf("error parsing API api.controlPlaneEndpoint %q: %s", cfg.API.ControlPlaneEndpoint, err)
}
}
appendSANsToAltNames(altNames, cfg.APIServerCertSANs, kubeadmconstants.APIServerCertName)

89
cmd/kubeadm/app/phases/certs/pkiutil/pki_helpers_test.go
View File

@ -436,48 +436,69 @@ func TestPathForPublicKey(t *testing.T) {
}
func TestGetAPIServerAltNames(t *testing.T) {
hostname := "valid-hostname"
advertiseIP := "1.2.3.4"
controlPlaneEndpoint := "api.k8s.io"
cfg := &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{AdvertiseAddress: advertiseIP, ControlPlaneEndpoint: controlPlaneEndpoint},
Networking: kubeadmapi.Networking{ServiceSubnet: "10.96.0.0/12", DNSDomain: "cluster.local"},
NodeName: hostname,
APIServerCertSANs: []string{"10.1.245.94", "10.1.245.95", "1.2.3.L", "invalid,commas,in,DNS"},
var tests = []struct {
name string
cfg *kubeadmapi.MasterConfiguration
expectedDNSNames []string
expectedIPAddresses []string
}{
{
name: "ControlPlaneEndpoint DNS",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{AdvertiseAddress: "1.2.3.4", ControlPlaneEndpoint: "api.k8s.io:6443"},
Networking: kubeadmapi.Networking{ServiceSubnet: "10.96.0.0/12", DNSDomain: "cluster.local"},
NodeName: "valid-hostname",
APIServerCertSANs: []string{"10.1.245.94", "10.1.245.95", "1.2.3.L", "invalid,commas,in,DNS"},
},
expectedDNSNames: []string{"valid-hostname", "kubernetes", "kubernetes.default", "kubernetes.default.svc", "kubernetes.default.svc.cluster.local", "api.k8s.io"},
expectedIPAddresses: []string{"10.96.0.1", "1.2.3.4", "10.1.245.94", "10.1.245.95"},
},
{
name: "ControlPlaneEndpoint IP",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{AdvertiseAddress: "1.2.3.4", ControlPlaneEndpoint: "4.5.6.7:6443"},
Networking: kubeadmapi.Networking{ServiceSubnet: "10.96.0.0/12", DNSDomain: "cluster.local"},
NodeName: "valid-hostname",
APIServerCertSANs: []string{"10.1.245.94", "10.1.245.95", "1.2.3.L", "invalid,commas,in,DNS"},
},
expectedDNSNames: []string{"valid-hostname", "kubernetes", "kubernetes.default", "kubernetes.default.svc", "kubernetes.default.svc.cluster.local"},
expectedIPAddresses: []string{"10.96.0.1", "1.2.3.4", "10.1.245.94", "10.1.245.95", "4.5.6.7"},
},
}
altNames, err := GetAPIServerAltNames(cfg)
if err != nil {
t.Fatalf("failed calling GetAPIServerAltNames: %v", err)
}
for _, rt := range tests {
altNames, err := GetAPIServerAltNames(rt.cfg)
if err != nil {
t.Fatalf("failed calling GetAPIServerAltNames: %s: %v", rt.name, err)
}
expectedDNSNames := []string{hostname, "kubernetes", "kubernetes.default", "kubernetes.default.svc", "kubernetes.default.svc.cluster.local", controlPlaneEndpoint}
for _, DNSName := range expectedDNSNames {
found := false
for _, val := range altNames.DNSNames {
if val == DNSName {
found = true
break
for _, DNSName := range rt.expectedDNSNames {
found := false
for _, val := range altNames.DNSNames {
if val == DNSName {
found = true
break
}
}
if !found {
t.Errorf("%s: altNames does not contain DNSName %s but %v", rt.name, DNSName, altNames.DNSNames)
}
}
if !found {
t.Errorf("altNames does not contain DNSName %s", DNSName)
}
}
expectedIPAddresses := []string{"10.96.0.1", advertiseIP, "10.1.245.94", "10.1.245.95"}
for _, IPAddress := range expectedIPAddresses {
found := false
for _, val := range altNames.IPs {
if val.Equal(net.ParseIP(IPAddress)) {
found = true
break
for _, IPAddress := range rt.expectedIPAddresses {
found := false
for _, val := range altNames.IPs {
if val.Equal(net.ParseIP(IPAddress)) {
found = true
break
}
}
}
if !found {
t.Errorf("altNames does not contain IPAddress %s", IPAddress)
if !found {
t.Errorf("%s: altNames does not contain IPAddress %s but %v", rt.name, IPAddress, altNames.IPs)
}
}
}
}

4
cmd/kubeadm/app/phases/kubeconfig/kubeconfig_test.go
View File

@ -72,12 +72,12 @@ func TestGetKubeConfigSpecs(t *testing.T) {
NodeName: "valid-node-name",
},
{
API: kubeadmapi.API{ControlPlaneEndpoint: "api.k8s.io", BindPort: 1234},
API: kubeadmapi.API{AdvertiseAddress: "1.2.3.4", ControlPlaneEndpoint: "api.k8s.io", BindPort: 1234},
CertificatesDir: pkidir,
NodeName: "valid-node-name",
},
{
API: kubeadmapi.API{ControlPlaneEndpoint: "api.k8s.io:4321", BindPort: 1234},
API: kubeadmapi.API{AdvertiseAddress: "1.2.3.4", ControlPlaneEndpoint: "api.k8s.io:4321", BindPort: 1234},
CertificatesDir: pkidir,
NodeName: "valid-node-name",
},

130
cmd/kubeadm/app/util/endpoint.go
View File

@ -19,67 +19,101 @@ package util
import (
"fmt"
"net"
"net/url"
"strconv"
"strings"
"k8s.io/apimachinery/pkg/util/validation"
kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
)
// GetMasterEndpoint returns a properly formatted Master Endpoint
// or passes the error from GetMasterHostPort.
// GetMasterEndpoint returns a properly formatted endpoint for the control plane built according following rules:
// - If the api.ControlPlaneEndpoint is defined, use it.
// - if the api.ControlPlaneEndpoint is defined but without a port number, use the api.ControlPlaneEndpoint + api.BindPort is used.
// - Otherwise, in case the api.ControlPlaneEndpoint is not defined, use the api.AdvertiseAddress + the api.BindPort.
func GetMasterEndpoint(api *kubeadmapi.API) (string, error) {
hostPort, err := GetMasterHostPort(api)
if err != nil {
return "", err
// parse the bind port
var bindPort = strconv.Itoa(int(api.BindPort))
if _, err := parsePort(bindPort); err != nil {
return "", fmt.Errorf("invalid value %q given for api.bindPort: %s", api.BindPort, err)
}
return fmt.Sprintf("https://%s", hostPort), nil
}
// GetMasterHostPort returns a properly formatted Master hostname or IP and port pair, or error
// if the hostname or IP address can not be parsed or port is outside the valid TCP range.
func GetMasterHostPort(api *kubeadmapi.API) (string, error) {
var masterIP string
var portStr string
// parse the AdvertiseAddress
var ip = net.ParseIP(api.AdvertiseAddress)
if ip == nil {
return "", fmt.Errorf("invalid value `%s` given for api.advertiseAddress", api.AdvertiseAddress)
}
// set the master url using cfg.API.AdvertiseAddress + the cfg.API.BindPort
masterURL := &url.URL{
Scheme: "https",
Host: net.JoinHostPort(ip.String(), bindPort),
}
// if the controlplane endpoint is defined
if len(api.ControlPlaneEndpoint) > 0 {
if strings.Contains(api.ControlPlaneEndpoint, ":") {
var err error
masterIP, portStr, err = net.SplitHostPort(api.ControlPlaneEndpoint)
if err != nil {
return "", fmt.Errorf("invalid value `%s` given for `ControlPlaneEndpoint`: %s", api.ControlPlaneEndpoint, err)
}
// parse the controlplane endpoint
var host, port string
var err error
if host, port, err = ParseHostPort(api.ControlPlaneEndpoint); err != nil {
return "", fmt.Errorf("invalid value %q given for api.controlPlaneEndpoint: %s", api.ControlPlaneEndpoint, err)
}
// if a port is provided within the controlPlaneAddress warn the users we are using it, else use the bindport
if port != "" {
fmt.Println("[endpoint] WARNING: port specified in api.controlPlaneEndpoint overrides api.bindPort in the controlplane address")
} else {
masterIP = api.ControlPlaneEndpoint
port = bindPort
}
errs := validation.IsDNS1123Subdomain(masterIP)
if len(errs) > 0 {
return "", fmt.Errorf("error parsing `ControlPlaneEndpoint` to valid dns subdomain with errors: %s", errs)
// overrides the master url using the controlPlaneAddress (and eventually the bindport)
masterURL = &url.URL{
Scheme: "https",
Host: net.JoinHostPort(host, port),
}
} else {
ip := net.ParseIP(api.AdvertiseAddress)
if ip == nil {
return "", fmt.Errorf("error parsing address %s", api.AdvertiseAddress)
}
masterIP = ip.String()
}
var port int32
if len(portStr) > 0 {
portInt, err := strconv.Atoi(portStr)
if err != nil {
return "", fmt.Errorf("error parsing `ControlPlaneEndpoint` port value `%s`: %s", portStr, err.Error())
}
port = int32(portInt)
fmt.Println("[endpoint] WARNING: specifying a port for `ControlPlaneEndpoint` overrides `BindPort`")
} else {
port = api.BindPort
}
if port < 0 || port > 65535 {
return "", fmt.Errorf("api server port must be between 0 and 65535, %d was given", port)
}
hostPort := net.JoinHostPort(masterIP, strconv.Itoa(int(port)))
return hostPort, nil
return masterURL.String(), nil
}
// ParseHostPort parses a network address of the form "host:port", "ipv4:port", "[ipv6]:port" into host and port;
// ":port" can be eventually omitted.
// If the string is not a valid representation of network address, ParseHostPort returns an error.
func ParseHostPort(hostport string) (string, string, error) {
var host, port string
var err error
// try to split host and port
if host, port, err = net.SplitHostPort(hostport); err != nil {
// if SplitHostPort returns an error, the entire hostport is considered as host
host = hostport
}
// if port is defined, parse and validate it
if port != "" {
if _, err := parsePort(port); err != nil {
return "", "", fmt.Errorf("port must be a valid number between 1 and 65535, inclusive")
}
}
// if host is a valid IP, returns it
if ip := net.ParseIP(host); ip != nil {
return host, port, nil
}
// if host is a validate RFC-1123 subdomain, returns it
if errs := validation.IsDNS1123Subdomain(host); len(errs) == 0 {
return host, port, nil
}
return "", "", fmt.Errorf("host must be a valid IP address or a valid RFC-1123 DNS subdomain")
}
// ParsePort parses a string representing a TCP port.
// If the string is not a valid representation of a TCP port, ParsePort returns an error.
func parsePort(port string) (int, error) {
if portInt, err := strconv.Atoi(port); err == nil && (1 <= portInt && portInt <= 65535) {
return portInt, nil
}
return 0, fmt.Errorf("port must be a valid number between 1 and 65535, inclusive")
}

463
cmd/kubeadm/app/util/endpoint_test.go
View File

@ -24,301 +24,322 @@ import (
func TestGetMasterEndpoint(t *testing.T) {
var tests = []struct {
name string
cfg *kubeadmapi.MasterConfiguration
endpoint string
expected bool
name string
api *kubeadmapi.API
expectedEndpoint string
expectedError bool
}{
{
name: "bad controlplane endpooint dns",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
ControlPlaneEndpoint: "bad!!cp.k8s.io",
BindPort: 1234,
},
name: "use ControlPlaneEndpoint (dns) if fully defined",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "cp.k8s.io:1234",
BindPort: 4567,
AdvertiseAddress: "4.5.6.7",
},
endpoint: "https://cp.k8s.io:1234",
expected: false,
expectedEndpoint: "https://cp.k8s.io:1234",
},
{
name: "both DNS and IP passed",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.3.4",
ControlPlaneEndpoint: "cp.k8s.io",
BindPort: 1234,
},
name: "use ControlPlaneEndpoint (ipv4) if fully defined",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "1.2.3.4:1234",
BindPort: 4567,
AdvertiseAddress: "4.5.6.7",
},
endpoint: "https://cp.k8s.io:1234",
expected: true,
expectedEndpoint: "https://1.2.3.4:1234",
},
{
name: "valid DNS endpoint",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
ControlPlaneEndpoint: "cp.k8s.io",
BindPort: 1234,
},
name: "use ControlPlaneEndpoint (ipv6) if fully defined",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "[2001:db8::1]:1234",
BindPort: 4567,
AdvertiseAddress: "4.5.6.7",
},
endpoint: "https://cp.k8s.io:1234",
expected: true,
expectedEndpoint: "https://[2001:db8::1]:1234",
},
{
name: "valid DNS endpoint with port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
ControlPlaneEndpoint: "cp.k8s.io:443",
BindPort: 1234,
},
name: "use ControlPlaneEndpoint (dns) + BindPort if ControlPlaneEndpoint defined without port",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "cp.k8s.io",
BindPort: 4567,
AdvertiseAddress: "4.5.6.7",
},
endpoint: "https://cp.k8s.io:443",
expected: true,
expectedEndpoint: "https://cp.k8s.io:4567",
},
{
name: "valid DNS endpoint and IP with port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.3.4",
ControlPlaneEndpoint: "cp.k8s.io:443",
BindPort: 1234,
},
name: "use ControlPlaneEndpoint (ipv4) + BindPort if ControlPlaneEndpoint defined without port",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "1.2.3.4",
BindPort: 4567,
AdvertiseAddress: "4.5.6.7",
},
endpoint: "https://cp.k8s.io:443",
expected: true,
expectedEndpoint: "https://1.2.3.4:4567",
},
{
name: "DNS endpoint with malformed port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
ControlPlaneEndpoint: "cp.k8s.io:443:443",
BindPort: 1234,
},
name: "use ControlPlaneEndpoint (ipv6) + BindPort if ControlPlaneEndpoint defined without port",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "2001:db8::1",
BindPort: 4567,
AdvertiseAddress: "4.5.6.7",
},
endpoint: "https://cp.k8s.io:443:443",
expected: false,
expectedEndpoint: "https://[2001:db8::1]:4567",
},
{
name: "DNS endpoint with colon and missing port uses bind port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
ControlPlaneEndpoint: "cp.k8s.io:",
BindPort: 1234,
},
name: "use AdvertiseAddress (ipv4) + BindPort if ControlPlaneEndpoint is not defined",
api: &kubeadmapi.API{
BindPort: 4567,
AdvertiseAddress: "4.5.6.7",
},
endpoint: "https://cp.k8s.io:1234",
expected: true,
expectedEndpoint: "https://4.5.6.7:4567",
},
{
name: "DNS endpoint with non numeric port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
ControlPlaneEndpoint: "cp.k8s.io:port",
BindPort: 1234,
},
name: "use AdvertiseAddress (ipv6) + BindPort if ControlPlaneEndpoint is not defined",
api: &kubeadmapi.API{
BindPort: 4567,
AdvertiseAddress: "2001:db8::1",
},
endpoint: "https://cp.k8s.io:port",
expected: false,
expectedEndpoint: "https://[2001:db8::1]:4567",
},
{
name: "DNS endpoint with invalid port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
ControlPlaneEndpoint: "cp.k8s.io:987654321",
BindPort: 1234,
},
name: "fail if invalid BindPort",
api: &kubeadmapi.API{
BindPort: 0,
},
endpoint: "https://cp.k8s.io:987654321",
expected: false,
expectedError: true,
},
{
name: "valid IPv4 endpoint",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.3.4",
BindPort: 1234,
},
name: "fail if invalid ControlPlaneEndpoint (dns)",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "bad!!.cp.k8s.io",
BindPort: 4567,
},
endpoint: "https://1.2.3.4:1234",
expected: true,
expectedError: true,
},
{
name: "valid IPv6 endpoint",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "2001:db8::1",
BindPort: 4321,
},
name: "fail if invalid ControlPlaneEndpoint (ip4)",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "1..0",
BindPort: 4567,
},
endpoint: "https://[2001:db8::1]:4321",
expected: true,
expectedError: true,
},
{
name: "invalid IPv4 endpoint",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.3.4",
BindPort: 1234,
},
name: "fail if invalid ControlPlaneEndpoint (ip6)",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "1200::AB00:1234::2552:7777:1313",
BindPort: 4567,
},
endpoint: "https://[1.2.3.4]:1234",
expected: false,
expectedError: true,
},
{
name: "invalid IPv6 endpoint",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "2001:db8::1",
BindPort: 4321,
},
name: "fail if invalid ControlPlaneEndpoint (port)",
api: &kubeadmapi.API{
ControlPlaneEndpoint: "cp.k8s.io:0",
BindPort: 4567,
},
endpoint: "https://2001:db8::1:4321",
expected: false,
expectedError: true,
},
{
name: "invalid IPv4 AdvertiseAddress",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.34",
BindPort: 1234,
},
name: "fail if invalid AdvertiseAddress (ip4)",
api: &kubeadmapi.API{
AdvertiseAddress: "1..0",
BindPort: 4567,
},
endpoint: "https://1.2.3.4:1234",
expected: false,
expectedError: true,
},
{
name: "invalid IPv6 AdvertiseAddress",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "2001::db8::1",
BindPort: 4321,
},
name: "fail if invalid AdvertiseAddress (ip6)",
api: &kubeadmapi.API{
AdvertiseAddress: "1200::AB00:1234::2552:7777:1313",
BindPort: 4567,
},
endpoint: "https://[2001:db8::1]:4321",
expected: false,
expectedError: true,
},
}
for _, rt := range tests {
actual, err := GetMasterEndpoint(&rt.cfg.API)
if err != nil && rt.expected {
t.Error(err)
actualEndpoint, actualError := GetMasterEndpoint(rt.api)
if (actualError != nil) && !rt.expectedError {
t.Errorf("%s unexpected failure: %v", rt.name, actualError)
continue
} else if (actualError == nil) && rt.expectedError {
t.Errorf("%s passed when expected to fail", rt.name)
continue
}
if actual != rt.endpoint && rt.expected {
t.Errorf(
"%s test case failed:\n\texpected: %s\n\t actual: %s",
rt.name,
rt.endpoint,
(actual),
)
if actualEndpoint != rt.expectedEndpoint {
t.Errorf("%s returned invalid endpoint %s, expected %s", rt.name, actualEndpoint, rt.expectedEndpoint)
}
}
}
func TestGetMasterHostPort(t *testing.T) {
func TestParseHostPort(t *testing.T) {
var tests = []struct {
name string
cfg *kubeadmapi.MasterConfiguration
hostPort string
expected bool
name string
hostport string
expectedHost string
expectedPort string
expectedError bool
}{
{
name: "valid IPv4 master host and port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.3.4",
BindPort: 1234,
},
},
hostPort: "1.2.3.4:1234",
expected: true,
name: "valid dns",
hostport: "cp.k8s.io",
expectedHost: "cp.k8s.io",
expectedPort: "",
},
{
name: "valid IPv6 master host port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "2001:db8::1",
BindPort: 4321,
},
},
hostPort: "[2001:db8::1]:4321",
expected: true,
name: "valid dns:port",
hostport: "cp.k8s.io:1234",
expectedHost: "cp.k8s.io",
expectedPort: "1234",
},
{
name: "invalid IPv4 address",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.34",
BindPort: 1234,
},
},
hostPort: "1.2.3.4:1234",
expected: false,
name: "valid ip4",
hostport: "1.2.3.4",
expectedHost: "1.2.3.4",
expectedPort: "",
},
{
name: "invalid IPv6 address",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "2001::db8::1",
BindPort: 4321,
},
},
hostPort: "[2001:db8::1]:4321",
expected: false,
name: "valid ipv4:port",
hostport: "1.2.3.4:1234",
expectedHost: "1.2.3.4",
expectedPort: "1234",
},
{
name: "invalid TCP port number",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.3.4",
BindPort: 987654321,
},
},
hostPort: "1.2.3.4:987654321",
expected: false,
name: "valid ipv6",
hostport: "2001:db8::1",
expectedHost: "2001:db8::1",
expectedPort: "",
},
{
name: "invalid negative TCP port number",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.3.4",
BindPort: -987654321,
},
},
hostPort: "1.2.3.4:-987654321",
expected: false,
name: "valid ipv6:port",
hostport: "[2001:db8::1]:1234",
expectedHost: "2001:db8::1",
expectedPort: "1234",
},
{
name: "unspecified IPv4 TCP port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1.2.3.4",
},
},
hostPort: "1.2.3.4:0",
expected: true,
name: "invalid port(not a number)",
hostport: "cp.k8s.io:aaa",
expectedError: true,
},
{
name: "unspecified IPv6 TCP port",
cfg: &kubeadmapi.MasterConfiguration{
API: kubeadmapi.API{
AdvertiseAddress: "1:2:3::4",
},
},
hostPort: "[1:2:3::4]:0",
expected: true,
name: "invalid port(out of range, positive port number)",
hostport: "cp.k8s.io:987654321",
expectedError: true,
},
{
name: "invalid port(out of range, negative port number)",
hostport: "cp.k8s.io:-987654321",
expectedError: true,
},
{
name: "invalid port(out of range, negative port number)",
hostport: "cp.k8s.io:123:123",
expectedError: true,
},
{
name: "invalid dns",
hostport: "bad!!cp.k8s.io",
expectedError: true,
},
{
name: "invalid valid dns:port",
hostport: "bad!!cp.k8s.io:1234",
expectedError: true,
},
{
name: "invalid ip4, but valid DNS",
hostport: "259.2.3.4",
expectedHost: "259.2.3.4",
},
{
name: "invalid ip4",
hostport: "1..3.4",
expectedError: true,
},
{
name: "invalid ip4(2):port",
hostport: "1..3.4:1234",
expectedError: true,
},
{
name: "invalid ipv6",
hostport: "1200::AB00:1234::2552:7777:1313",
expectedError: true,
},
{
name: "invalid ipv6:port",
hostport: "[1200::AB00:1234::2552:7777:1313]:1234",
expectedError: true,
},
}
for _, rt := range tests {
actual, err := GetMasterHostPort(&rt.cfg.API)
if err != nil && rt.expected {
t.Error(err)
actualHost, actualPort, actualError := ParseHostPort(rt.hostport)
if (actualError != nil) && !rt.expectedError {
t.Errorf("%s unexpected failure: %v", rt.name, actualError)
continue
} else if (actualError == nil) && rt.expectedError {
t.Errorf("%s passed when expected to fail", rt.name)
continue
}
if actual != rt.hostPort && rt.expected {
t.Errorf(
"%s test case failed:\n\texpected: %s\n\t actual: %s",
rt.name,
rt.hostPort,
(actual),
)
if actualHost != rt.expectedHost {
t.Errorf("%s returned invalid host %s, expected %s", rt.name, actualHost, rt.expectedHost)
continue
}
if actualPort != rt.expectedPort {
t.Errorf("%s returned invalid port %s, expected %s", rt.name, actualPort, rt.expectedPort)
}
}
}
func TestParsePort(t *testing.T) {
var tests = []struct {
name string
port string
expectedPort int
expectedError bool
}{
{
name: "valid port",
port: "1234",
expectedPort: 1234,
},
{
name: "invalid port (not a number)",
port: "a",
expectedError: true,
},
{
name: "invalid port (<1)",
port: "-10",
expectedError: true,
},
{
name: "invalid port (>65535)",
port: "66535",
expectedError: true,
},
}
for _, rt := range tests {
actualPort, actualError := parsePort(rt.port)
if (actualError != nil) && !rt.expectedError {
t.Errorf("%s unexpected failure: %v", rt.name, actualError)
continue
} else if (actualError == nil) && rt.expectedError {
t.Errorf("%s passed when expected to fail", rt.name)
continue
}
if actualPort != rt.expectedPort {
t.Errorf("%s returned invalid port %d, expected %d", rt.name, actualPort, rt.expectedPort)
}
}
}