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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"
"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.KubeClient.CoreV1().Endpoints(k.Namespace).Get(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].Addresses) != 0 {
ip = eps.Subsets[0].Addresses[0].IP
} else if len(eps.Subsets[0].NotReadyAddresses) != 0 {
ip = eps.Subsets[0].NotReadyAddresses[0].IP
} else {
err = fmt.Errorf("could not get endpoint addresses for service %s", svc)
return "", err
}
}
return
}
func (k *KubeInfo) generateRemoteIstio(src, dst string) error {
content, err := ioutil.ReadFile(src)
if err != nil {
return fmt.Errorf("cannot read remote yaml file %s", src)
}
svcs := []string{"istio-pilot", "istio-policy", "istio-statsd-prom-bridge", "istio-ingress", "istio-telemetry"}
for _, svc := range svcs {
var ip string
ip, err = k.getEndpointIPForService(svc)
if err == nil {
replaceStr := fmt.Sprintf("%s.istio-system", svc)
content = replacePattern(content, replaceStr, ip)
log.Infof("Service %s has an endpoint IP %s", svc, ip)
} else {
return err
}
}
content = replacePattern(content, istioSystem, k.Namespace)
err = ioutil.WriteFile(dst, content, 0600)
if err != nil {
return fmt.Errorf("cannot write remote into generated yaml file %s", dst)
}
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
}