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runner.go
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runner.go
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// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 main
import (
"bytes"
"errors"
"flag"
"fmt"
"net/http"
"os"
"os/exec"
"path"
"strconv"
"strings"
"sync"
"time"
"github.com/google/cadvisor/integration/common"
"github.com/golang/glog"
)
const cadvisorBinary = "cadvisor"
var cadvisorTimeout = flag.Duration("cadvisor_timeout", 15*time.Second, "Time to wait for cAdvisor to come up on the remote host")
var port = flag.Int("port", 8080, "Port in which to start cAdvisor in the remote host")
func RunCommand(cmd string, args ...string) error {
output, err := exec.Command(cmd, args...).CombinedOutput()
if err != nil {
return fmt.Errorf("command %q %q failed with error: %v and output: %q", cmd, args, err, output)
}
return nil
}
func PushAndRunTests(host, testDir string) error {
// Push binary.
glog.Infof("Pushing cAdvisor binary to %q...", host)
args := common.GetGCComputeArgs("ssh", host, "--", "mkdir", "-p", testDir)
err := RunCommand("gcloud", args...)
if err != nil {
return fmt.Errorf("failed to make remote testing directory: %v", err)
}
defer func() {
args := common.GetGCComputeArgs("ssh", host, "--", "rm", "-rf", testDir)
err := RunCommand("gcloud", args...)
if err != nil {
glog.Errorf("Failed to cleanup test directory: %v", err)
}
}()
args = common.GetGCComputeArgs("copy-files", cadvisorBinary, fmt.Sprintf("%s:%s", host, testDir))
err = RunCommand("gcloud", args...)
if err != nil {
return fmt.Errorf("failed to copy binary: %v", err)
}
// TODO(vmarmol): Get logs in case of failures.
// Start cAdvisor.
glog.Infof("Running cAdvisor on %q...", host)
portStr := strconv.Itoa(*port)
errChan := make(chan error)
go func() {
args = common.GetGCComputeArgs("ssh", host, "--", fmt.Sprintf("sudo %s --port %s --logtostderr", path.Join(testDir, cadvisorBinary), portStr))
err = RunCommand("gcloud", args...)
if err != nil {
errChan <- fmt.Errorf("error running cAdvisor: %v", err)
}
}()
defer func() {
args = common.GetGCComputeArgs("ssh", host, "--", "sudo", "pkill", cadvisorBinary)
err := RunCommand("gcloud", args...)
if err != nil {
glog.Errorf("Failed to cleanup: %v", err)
}
}()
ipAddress, err := common.GetGceIp(host)
if err != nil {
return fmt.Errorf("failed to get GCE IP: %v", err)
}
// Wait for cAdvisor to come up.
endTime := time.Now().Add(*cadvisorTimeout)
done := false
for endTime.After(time.Now()) && !done {
select {
case err := <-errChan:
// Quit early if there was an error.
return err
case <-time.After(500 * time.Millisecond):
// Stop waiting when cAdvisor is healthy..
resp, err := http.Get(fmt.Sprintf("http://%s:%s/healthz", ipAddress, portStr))
if err == nil && resp.StatusCode == http.StatusOK {
done = true
break
}
}
}
if !done {
return fmt.Errorf("timed out waiting for cAdvisor to come up at host %q", host)
}
// Run the tests.
glog.Infof("Running integration tests targeting %q...", host)
err = RunCommand("godep", "go", "test", "github.com/google/cadvisor/integration/tests/...", "--host", host, "--port", portStr)
if err != nil {
return err
}
return nil
}
func Run() error {
start := time.Now()
defer func() {
glog.Infof("Execution time %v", time.Since(start))
}()
defer glog.Flush()
hosts := flag.Args()
testDir := fmt.Sprintf("/tmp/cadvisor-%d", os.Getpid())
glog.Infof("Running integration tests on host(s) %q", strings.Join(hosts, ","))
// Build cAdvisor.
glog.Infof("Building cAdvisor...")
err := RunCommand("godep", "go", "build", "github.com/google/cadvisor")
if err != nil {
return err
}
defer func() {
err := RunCommand("rm", cadvisorBinary)
if err != nil {
glog.Error(err)
}
}()
// Run test on all hosts in parallel.
var wg sync.WaitGroup
allErrors := make([]error, 0)
var allErrorsLock sync.Mutex
for _, host := range hosts {
wg.Add(1)
go func(host string) {
defer wg.Done()
err := PushAndRunTests(host, testDir)
if err != nil {
func() {
allErrorsLock.Lock()
defer allErrorsLock.Unlock()
allErrors = append(allErrors, err)
}()
}
}(host)
}
wg.Wait()
if len(allErrors) != 0 {
var buffer bytes.Buffer
for i, err := range allErrors {
buffer.WriteString(fmt.Sprintf("Error %d: ", i))
buffer.WriteString(err.Error())
buffer.WriteString("\n")
}
return errors.New(buffer.String())
}
glog.Infof("All tests pass!")
return nil
}
func main() {
flag.Parse()
// Check usage.
if len(flag.Args()) == 0 {
glog.Fatalf("USAGE: runner <hosts to test>")
}
// Run the tests.
err := Run()
if err != nil {
glog.Fatal(err)
}
}