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istio.go
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istio.go
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package kubernetes
import (
"encoding/json"
"fmt"
"regexp"
"strings"
"time"
api_networking_v1 "istio.io/api/networking/v1"
networking_v1 "istio.io/client-go/pkg/apis/networking/v1"
security_v1 "istio.io/client-go/pkg/apis/security/v1"
istio "istio.io/client-go/pkg/clientset/versioned"
appsv1 "k8s.io/api/apps/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
k8s_networking_v1 "sigs.k8s.io/gateway-api/apis/v1"
gatewayapiclient "sigs.k8s.io/gateway-api/pkg/client/clientset/versioned"
"github.com/kiali/kiali/config"
"github.com/kiali/kiali/log"
"github.com/kiali/kiali/util/httputil"
)
const (
ComponentHealthy = "Healthy"
ComponentNotFound = "NotFound"
ComponentNotReady = "NotReady"
ComponentUnhealthy = "Unhealthy"
ComponentUnreachable = "Unreachable"
)
type ComponentStatus struct {
// Cluster where this component is deployed.
// Can be unknown or external for external services.
Cluster string `json:"-"`
// Namespace where the component is deployed.
// This field is ignored when marshalling to JSON.
Namespace string `json:"-"`
// The workload name of the Istio component.
//
// example: istio-ingressgateway
// required: true
Name string `json:"name"`
// The status of an Istio component.
//
// example: Not Found
// required: true
Status string `json:"status"`
// When true, the component is necessary for Istio to function. Otherwise, it is an addon.
//
// example: true
// required: true
IsCore bool `json:"is_core"`
}
type IstioComponentStatus []ComponentStatus
func (ics *IstioComponentStatus) Merge(cs IstioComponentStatus) IstioComponentStatus {
*ics = append(*ics, cs...)
return *ics
}
const (
envoyAdminPort = 15000
)
var (
portNameMatcher = regexp.MustCompile(`^[\-].*`)
// UDP protocol is not proxied, but it is functional. keeping it in protocols list not to cause UI issues.
portProtocols = [...]string{"grpc", "grpc-web", "http", "http2", "https", "mongo", "redis", "tcp", "tls", "udp", "mysql"}
)
type IstioClientInterface interface {
Istio() istio.Interface
// GatewayAPI returns the gateway-api kube client.
GatewayAPI() gatewayapiclient.Interface
GetConfigDump(namespace, podName string) (*ConfigDump, error)
SetProxyLogLevel(namespace, podName, level string) error
}
func (in *K8SClient) Istio() istio.Interface {
return in.istioClientset
}
func (in *K8SClient) GatewayAPI() gatewayapiclient.Interface {
return in.gatewayapi
}
func (in *K8SClient) GetConfigDump(namespace, podName string) (*ConfigDump, error) {
// Fetching the Config Dump from the pod's Envoy.
// The port 15000 is open on each Envoy Sidecar (managed by Istio) to serve the Envoy Admin interface.
// This port can only be accessed by inside the pod.
// See the Istio's doc page about its port usage:
// https://istio.io/latest/docs/ops/deployment/requirements/#ports-used-by-istio
resp, err := in.ForwardGetRequest(namespace, podName, 15000, "/config_dump")
if err != nil {
log.Errorf("Error forwarding the /config_dump request: %v", err)
return nil, err
}
cd := &ConfigDump{}
err = json.Unmarshal(resp, cd)
if err != nil {
log.Errorf("Error Unmarshalling the config_dump: %v", err)
}
return cd, err
}
func (in *K8SClient) SetProxyLogLevel(namespace, pod, level string) error {
path := fmt.Sprintf("/logging?level=%s", level)
localPort := httputil.Pool.GetFreePort()
defer httputil.Pool.FreePort(localPort)
f, err := in.getPodPortForwarder(namespace, pod, fmt.Sprintf("%d:%d", localPort, envoyAdminPort))
if err != nil {
return err
}
// Start the forwarding
if err := f.Start(); err != nil {
return err
}
// Defering the finish of the port-forwarding
defer f.Stop()
// Ready to create a request
url := fmt.Sprintf("http://localhost:%d%s", localPort, path)
body, code, _, err := httputil.HttpPost(url, nil, nil, time.Second*10, nil)
if code >= 400 {
log.Errorf("Error whilst posting. Error: %s. Body: %s", err, string(body))
return fmt.Errorf("error sending post request %s from %s/%s. Response code: %d", path, namespace, pod, code)
}
return err
}
// ServiceEntryHostnames returns a list of hostnames defined in the ServiceEntries Specs. Key in the resulting map is the protocol (in lowercase) + hostname
// exported for test
func ServiceEntryHostnames(serviceEntries []*networking_v1.ServiceEntry) map[string][]string {
hostnames := make(map[string][]string)
for _, v := range serviceEntries {
for _, host := range v.Spec.Hosts {
hostnames[host] = make([]string, 0, 1)
}
for _, port := range v.Spec.Ports {
protocol := mapPortToVirtualServiceProtocol(port.Protocol)
for host := range hostnames {
hostnames[host] = append(hostnames[host], protocol)
}
}
}
return hostnames
}
// mapPortToVirtualServiceProtocol transforms Istio's Port-definitions' protocol names to VirtualService's protocol names
func mapPortToVirtualServiceProtocol(proto string) string {
// http: HTTP/HTTP2/GRPC/ TLS-terminated-HTTPS and service entry ports using HTTP/HTTP2/GRPC protocol
// tls: HTTPS/TLS protocols (i.e. with “passthrough” TLS mode) and service entry ports using HTTPS/TLS protocols.
// tcp: everything else
switch proto {
case "HTTP":
fallthrough
case "HTTP2":
fallthrough
case "GRPC":
return "http"
case "HTTPS":
fallthrough
case "TLS":
return "tls"
default:
return "tcp"
}
}
// ValidatePort parses the Istio Port definition and validates the naming scheme
func ValidatePort(portDef *api_networking_v1.Port) bool {
if portDef == nil {
return false
}
return MatchPortNameRule(portDef.Name, portDef.Protocol)
}
// ValidateServicePort parses the Istio Port definition and validates the naming scheme
func ValidateServicePort(portDef *api_networking_v1.ServicePort) bool {
if portDef == nil {
return false
}
return MatchPortNameRule(portDef.Name, portDef.Protocol)
}
func MatchPortNameRule(portName, protocol string) bool {
protocol = strings.ToLower(protocol)
// Check that portName begins with the protocol
if protocol == "tcp" || protocol == "udp" {
// TCP and UDP protocols do not care about the name
return true
}
if !strings.HasPrefix(portName, protocol) {
return false
}
// If longer than protocol, then it must adhere to <protocol>[-suffix]
// and if there's -, then there must be a suffix ..
if len(portName) > len(protocol) {
restPortName := portName[len(protocol):]
return portNameMatcher.MatchString(restPortName)
}
// Case portName == protocolName
return true
}
func MatchPortNameWithValidProtocols(portName string) bool {
for _, protocol := range portProtocols {
if strings.HasPrefix(portName, protocol) &&
(strings.ToLower(portName) == protocol || portNameMatcher.MatchString(portName[len(protocol):])) {
return true
}
}
return false
}
func MatchPortAppProtocolWithValidProtocols(appProtocol *string) bool {
if appProtocol == nil || *appProtocol == "" {
return false
}
for _, protocol := range portProtocols {
if strings.ToLower(*appProtocol) == protocol {
return true
}
}
return false
}
// GatewayNames extracts the gateway names for easier matching
func GatewayNames(gateways []*networking_v1.Gateway) map[string]struct{} {
var empty struct{}
names := make(map[string]struct{})
for _, gw := range gateways {
names[ParseHost(gw.Name, gw.Namespace).String()] = empty
}
return names
}
// K8sGatewayNames extracts the gateway names for easier matching
func K8sGatewayNames(gateways []*k8s_networking_v1.Gateway) map[string]k8s_networking_v1.Gateway {
names := make(map[string]k8s_networking_v1.Gateway)
for _, gw := range gateways {
names[ParseHost(gw.Name, gw.Namespace).String()] = *gw
}
return names
}
func PeerAuthnHasStrictMTLS(peerAuthn *security_v1.PeerAuthentication) bool {
_, mode := PeerAuthnHasMTLSEnabled(peerAuthn)
return mode == "STRICT"
}
func PeerAuthnHasMTLSEnabled(peerAuthn *security_v1.PeerAuthentication) (bool, string) {
// It is no globally enabled when has targets
if peerAuthn.Spec.Selector != nil && len(peerAuthn.Spec.Selector.MatchLabels) >= 0 {
return false, ""
}
return PeerAuthnMTLSMode(peerAuthn)
}
func PeerAuthnMTLSMode(peerAuthn *security_v1.PeerAuthentication) (bool, string) {
// It is globally enabled when mtls is in STRICT mode
if peerAuthn.Spec.Mtls != nil {
mode := peerAuthn.Spec.Mtls.Mode.String()
return mode == "STRICT" || mode == "PERMISSIVE", mode
}
return false, ""
}
func DestinationRuleHasMeshWideMTLSEnabled(destinationRule *networking_v1.DestinationRule) (bool, string) {
// Following the suggested procedure to enable mesh-wide mTLS, host might be '*.local':
// https://istio.io/docs/tasks/security/authn-policy/#globally-enabling-istio-mutual-tls
return DestinationRuleHasMTLSEnabledForHost("*.local", destinationRule)
}
func DestinationRuleHasNamespaceWideMTLSEnabled(namespace string, destinationRule *networking_v1.DestinationRule) (bool, string) {
// Following the suggested procedure to enable namespace-wide mTLS, host might be '*.namespace.svc.cluster.local'
// https://istio.io/docs/tasks/security/authn-policy/#namespace-wide-policy
nsHost := fmt.Sprintf("*.%s.%s", namespace, config.Get().ExternalServices.Istio.IstioIdentityDomain)
return DestinationRuleHasMTLSEnabledForHost(nsHost, destinationRule)
}
func DestinationRuleHasMTLSEnabledForHost(expectedHost string, destinationRule *networking_v1.DestinationRule) (bool, string) {
if destinationRule.Spec.Host == "" || destinationRule.Spec.Host != expectedHost {
return false, ""
}
return DestinationRuleHasMTLSEnabled(destinationRule)
}
func DestinationRuleHasMTLSEnabled(destinationRule *networking_v1.DestinationRule) (bool, string) {
if destinationRule.Spec.TrafficPolicy != nil && destinationRule.Spec.TrafficPolicy.Tls != nil {
mode := destinationRule.Spec.TrafficPolicy.Tls.Mode.String()
return mode == "ISTIO_MUTUAL", mode
}
return false, ""
}
// ClusterNameFromIstiod attempts to resolve the cluster info of the "home" cluster where kiali is running
// by inspecting the istiod deployment. Assumes that the istiod deployment is in the same cluster as the kiali pod.
func ClusterNameFromIstiod(conf config.Config, k8s ClientInterface) (string, error) {
// The "cluster_id" is set in an environment variable of
// the "istiod" deployment. Let's try to fetch it.
var istiodDeployment *appsv1.Deployment
if istiodDeploymentName := conf.ExternalServices.Istio.IstiodDeploymentName; istiodDeploymentName != "" {
deployment, err := k8s.GetDeployment(conf.IstioNamespace, istiodDeploymentName)
if err != nil {
return "", err
}
istiodDeployment = deployment
} else {
istiodDeployments, err := k8s.GetDeployments(conf.IstioNamespace, metav1.ListOptions{LabelSelector: "app=istiod"})
if err != nil {
return "", err
}
if len(istiodDeployments) == 0 {
return "", fmt.Errorf("istiod deployment not found in namespace [%s]", conf.IstioNamespace)
}
// Just take the first one since they should all have the same cluster id.
istiodDeployment = &istiodDeployments[0]
}
istiodContainers := istiodDeployment.Spec.Template.Spec.Containers
if len(istiodContainers) == 0 {
return "", fmt.Errorf("istiod deployment [%s] has no containers", istiodDeployment.Name)
}
clusterName := ""
for _, v := range istiodContainers[0].Env {
if v.Name == "CLUSTER_ID" {
clusterName = v.Value
break
}
}
if clusterName == "" {
// We didn't find it. This may mean that Istio is not setup with multi-cluster enabled.
return "", fmt.Errorf("istiod deployment [%s] does not have the CLUSTER_ID environment variable set", istiodDeployment.Name)
}
return clusterName, nil
}
func GatewayAPIClasses(ambientEnabled bool) []config.GatewayAPIClass {
result := []config.GatewayAPIClass{}
for _, gwClass := range config.Get().ExternalServices.Istio.GatewayAPIClasses {
if gwClass.ClassName != "" && gwClass.Name != "" {
result = append(result, gwClass)
}
}
if len(result) == 0 {
result = append(result, config.GatewayAPIClass{Name: "Istio", ClassName: "istio"})
if ambientEnabled {
result = append(result, config.GatewayAPIClass{Name: "Waypoint", ClassName: "istio-waypoint"})
}
}
return result
}