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multicluster.go
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multicluster.go
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// Copyright 2017 Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package framework
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"time"
v1 "k8s.io/api/core/v1"
meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"istio.io/istio/pkg/log"
"istio.io/istio/tests/util"
)
func getKubeConfigFromFile(dirname string) (string, error) {
// The tests assume that only a single remote cluster (i.e. a single file) is in play
var remoteKube string
err := filepath.Walk(dirname, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if (info.Mode() & os.ModeType) != 0 {
return nil
}
_, err = ioutil.ReadFile(path)
if err != nil {
log.Warnf("Failed to read %s: %v", path, err)
return err
}
remoteKube = path
return nil
})
if err != nil {
return "", nil
}
return remoteKube, nil
}
func (k *KubeInfo) getEndpointIPForService(svc string) (ip string, err error) {
getOpt := meta_v1.GetOptions{IncludeUninitialized: true}
var eps *v1.Endpoints
// Wait until endpoint is obtained
for i := 0; i <= 200; i++ {
eps, err = k.KubeAccessor.GetEndpoints(k.Namespace, svc, getOpt)
if (len(eps.Subsets) == 0) || (err != nil) {
time.Sleep(time.Second * 1)
} else {
break
}
}
if err == nil && eps != nil {
if len(eps.Subsets) > 0 {
if len(eps.Subsets[0].Addresses) != 0 {
ip = eps.Subsets[0].Addresses[0].IP
} else if len(eps.Subsets[0].NotReadyAddresses) != 0 {
ip = eps.Subsets[0].NotReadyAddresses[0].IP
}
}
if ip == "" {
err = fmt.Errorf("could not get endpoint addresses for service %s", svc)
return "", err
}
}
return
}
func (k *KubeInfo) generateRemoteIstio(dst string, useAutoInject bool, proxyHub, proxyTag string) (err error) {
svcToHelmVal := map[string]string{
"istio-pilot": "remotePilotAddress",
"istio-policy": "remotePolicyAddress",
"istio-ingressgateway": "ingressGatewayEndpoint",
"istio-telemetry": "remoteTelemetryAddress",
"zipkin": "remoteZipkinAddress",
}
var helmSetContent string
var ingressGatewayAddr string
for svc, helmVal := range svcToHelmVal {
var ip string
ip, err = k.getEndpointIPForService(svc)
if err == nil {
helmSetContent += " --set global." + helmVal + "=" + ip
log.Infof("Service %s has an endpoint IP %s", svc, ip)
if svc == "istio-ingressgateway" {
ingressGatewayAddr = ip
}
} else {
log.Infof("Endpoint for service %s not found", svc)
}
}
if !useAutoInject {
helmSetContent += " --set sidecarInjectorWebhook.enabled=false"
log.Infof("Remote cluster auto-sidecar injection disabled")
} else {
helmSetContent += " --set sidecarInjectorWebhook.enabled=true"
log.Infof("Remote cluster auto-sidecar injection enabled")
}
if proxyHub != "" && proxyTag != "" {
helmSetContent += " --set global.hub=" + proxyHub + " --set global.tag=" + proxyTag
}
err = util.HelmClientInit()
if err != nil {
log.Errorf("cnnot run helm init %v", err)
return err
}
chartDir := filepath.Join(k.ReleaseDir, "install/kubernetes/helm/istio-remote")
err = util.HelmDepUpdate(chartDir)
if err != nil {
log.Errorf("cannot run helm dep update for istio-remote %v", err)
return err
}
err = util.HelmTemplate(chartDir, "istio-remote", k.Namespace, helmSetContent, dst)
if err != nil {
log.Errorf("cannot write remote into generated yaml file %s: %v", dst, err)
return err
}
if ingressGatewayAddr != "" {
k.appendIngressGateway(dst, ingressGatewayAddr)
}
return nil
}
func (k *KubeInfo) createCacerts(remoteCluster bool) (err error) {
kc := k.KubeConfig
cluster := "primary"
if remoteCluster {
kc = k.RemoteKubeConfig
cluster = "remote"
}
caCertFile := filepath.Join(k.ReleaseDir, caCertFileName)
caKeyFile := filepath.Join(k.ReleaseDir, caKeyFileName)
rootCertFile := filepath.Join(k.ReleaseDir, rootCertFileName)
certChainFile := filepath.Join(k.ReleaseDir, certChainFileName)
if _, err = util.Shell("kubectl create secret generic cacerts --kubeconfig=%s -n %s "+
"--from-file=%s --from-file=%s --from-file=%s --from-file=%s",
kc, k.Namespace, caCertFile, caKeyFile, rootCertFile, certChainFile); err == nil {
log.Infof("Created Cacerts with namespace %s in %s cluster", k.Namespace, cluster)
}
return err
}
func (k *KubeInfo) appendIngressGateway(dst, ingressAddr string) (err error) {
var ingressGwSvc = `
---
apiVersion: v1
kind: Service
metadata:
name: istio-ingressgateway
namespace: %s
spec:
type: ClusterIP
clusterIP: None
ports:
-
name: http2
port: 80
-
name: https
port: 443
-
name: tcp
port: 31400
---
apiVersion: v1
kind: Endpoints
metadata:
name: istio-ingressgateway
namespace: istio-system
subsets:
- addresses:
- ip: %s
ports:
-
name: http2
port: 80
-
name: https
port: 443
-
name: tcp
port: 31400
`
f, err := os.OpenFile(dst, os.O_APPEND|os.O_WRONLY, 0644)
if err != nil {
return err
}
defer f.Close()
if _, err = f.WriteString(fmt.Sprintf(ingressGwSvc, k.Namespace, ingressAddr)); err != nil {
return err
}
return nil
}