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Run integration tests in parallel when possible.
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Tom Wilkie
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Jul 29, 2015
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,246 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "fmt" | ||
| "net/http" | ||
| "net/url" | ||
| "os" | ||
| "os/exec" | ||
| "sort" | ||
| "strconv" | ||
| "strings" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/docker/docker/pkg/mflag" | ||
| "github.com/mgutz/ansi" | ||
| ) | ||
|
|
||
| const ( | ||
| schedulerHost = "positive-cocoa-90213.appspot.com" | ||
| JSON = "application/json" | ||
| ) | ||
|
|
||
| var ( | ||
| start = ansi.ColorCode("white+ub") | ||
| fail = ansi.ColorCode("red+b") | ||
| succ = ansi.ColorCode("green+b") | ||
| reset = ansi.ColorCode("reset") | ||
|
|
||
| useScheduler = false | ||
| runParallel = false | ||
|
|
||
| consoleLock = sync.Mutex{} | ||
| ) | ||
|
|
||
| type test struct { | ||
| name string | ||
| hosts int | ||
| } | ||
|
|
||
| type schedule struct { | ||
| Tests []string `json:"tests"` | ||
| } | ||
|
|
||
| type result struct { | ||
| errored bool | ||
| hosts []string | ||
| } | ||
|
|
||
| type tests []test | ||
|
|
||
| func (ts tests) Len() int { return len(ts) } | ||
| func (ts tests) Swap(i, j int) { ts[i], ts[j] = ts[j], ts[i] } | ||
| func (ts tests) Less(i, j int) bool { | ||
| if ts[i].hosts != ts[j].hosts { | ||
| return ts[i].hosts < ts[j].hosts | ||
| } | ||
| return ts[i].name < ts[j].name | ||
| } | ||
|
|
||
| func (ts *tests) pick(availible int) (test, bool) { | ||
| // pick the first test that fits in the availible hosts | ||
| for i, test := range *ts { | ||
| if test.hosts <= availible { | ||
| *ts = append((*ts)[:i], (*ts)[i+1:]...) | ||
| return test, true | ||
| } | ||
| } | ||
|
|
||
| return test{}, false | ||
| } | ||
|
|
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| func (t test) run(hosts []string) bool { | ||
| consoleLock.Lock() | ||
| fmt.Printf("%s>>> Running %s on %s%s\n", start, t.name, hosts, reset) | ||
| consoleLock.Unlock() | ||
|
|
||
| var out bytes.Buffer | ||
|
|
||
| cmd := exec.Command(t.name) | ||
| cmd.Env = os.Environ() | ||
| cmd.Stdout = &out | ||
| cmd.Stderr = &out | ||
|
|
||
| // replace HOSTS in env | ||
| for i, env := range cmd.Env { | ||
| if strings.HasPrefix(env, "HOSTS") { | ||
| cmd.Env[i] = fmt.Sprintf("HOSTS=%s", strings.Join(hosts, " ")) | ||
| break | ||
| } | ||
| } | ||
|
|
||
| start := time.Now() | ||
| err := cmd.Run() | ||
| duration := float64(time.Now().Sub(start)) / float64(time.Second) | ||
|
|
||
| consoleLock.Lock() | ||
| if err != nil { | ||
| fmt.Printf("%s>>> Test %s finished after %0.1f secs with error: %v%s\n", fail, t.name, duration, err, reset) | ||
| } else { | ||
| fmt.Printf("%s>>> Test %s finished with success after %0.1f secs%s\n", succ, t.name, duration, reset) | ||
| } | ||
| fmt.Print(out.String()) | ||
| fmt.Println() | ||
| consoleLock.Unlock() | ||
|
|
||
| if err != nil && useScheduler { | ||
| updateScheduler(t.name, duration) | ||
| } | ||
|
|
||
| return err != nil | ||
| } | ||
|
|
||
| func updateScheduler(test string, duration float64) { | ||
| req := &http.Request{ | ||
| Method: "POST", | ||
| Host: schedulerHost, | ||
| URL: &url.URL{ | ||
| Opaque: fmt.Sprintf("/record/%s/%0.2f", url.QueryEscape(test), duration), | ||
| Scheme: "http", | ||
| Host: schedulerHost, | ||
| }, | ||
| Close: true, | ||
| } | ||
| if resp, err := http.DefaultClient.Do(req); err != nil { | ||
| fmt.Printf("Error updating scheduler: %v\n", err) | ||
| } else { | ||
| resp.Body.Close() | ||
| } | ||
| } | ||
|
|
||
| func getSchedule(tests []string) ([]string, error) { | ||
| var ( | ||
| testRun = "integration-" + os.Getenv("CIRCLE_BUILD_NUM") | ||
| shardCount = os.Getenv("CIRCLE_NODE_TOTAL") | ||
| shardID = os.Getenv("CIRCLE_NODE_INDEX") | ||
| requestBody = &bytes.Buffer{} | ||
| ) | ||
| if err := json.NewEncoder(requestBody).Encode(schedule{tests}); err != nil { | ||
| return []string{}, err | ||
| } | ||
| url := fmt.Sprintf("http://%s/schedule/%s/%s/%s", schedulerHost, testRun, shardCount, shardID) | ||
| resp, err := http.Post(url, JSON, requestBody) | ||
| if err != nil { | ||
| return []string{}, err | ||
| } | ||
| var sched schedule | ||
| if err := json.NewDecoder(resp.Body).Decode(&sched); err != nil { | ||
| return []string{}, err | ||
| } | ||
| return sched.Tests, nil | ||
| } | ||
|
|
||
| func getTests(testNames []string) (tests, error) { | ||
| var err error | ||
| if useScheduler { | ||
| testNames, err = getSchedule(testNames) | ||
| if err != nil { | ||
| return tests{}, err | ||
| } | ||
| } | ||
| tests := tests{} | ||
| for _, name := range testNames { | ||
| parts := strings.Split(strings.TrimSuffix(name, "_test.sh"), "_") | ||
| numHosts, err := strconv.Atoi(parts[len(parts)-1]) | ||
| if err != nil { | ||
| numHosts = 1 | ||
| } | ||
| tests = append(tests, test{name, numHosts}) | ||
| fmt.Printf("Test %s needs %d hosts\n", name, numHosts) | ||
| } | ||
| sort.Sort(sort.Reverse(tests)) | ||
| return tests, nil | ||
| } | ||
|
|
||
| func parallel(tests tests, hosts []string) bool { | ||
| resultsChan := make(chan result) | ||
| outstanding := 0 | ||
| errored := false | ||
| for len(tests) > 0 || outstanding > 0 { | ||
| // While we have some free hosts, try and schedule | ||
| // a test on them | ||
| for len(hosts) > 0 { | ||
| test, ok := tests.pick(len(hosts)) | ||
| if !ok { | ||
| break | ||
| } | ||
| testHosts := hosts[:test.hosts] | ||
| hosts = hosts[test.hosts:] | ||
|
|
||
| go func() { | ||
| errored := test.run(testHosts) | ||
| resultsChan <- result{errored, testHosts} | ||
| }() | ||
| outstanding++ | ||
| } | ||
|
|
||
| // Otherwise, wait for the test to finish and return | ||
| // the hosts to the pool | ||
| result := <-resultsChan | ||
| hosts = append(hosts, result.hosts...) | ||
| outstanding-- | ||
| errored = result.errored || errored | ||
| } | ||
| return errored | ||
| } | ||
|
|
||
| func sequential(tests tests, hosts []string) bool { | ||
| errored := false | ||
| for _, test := range tests { | ||
| errored = test.run(hosts) || errored | ||
| } | ||
| return errored | ||
| } | ||
|
|
||
| func main() { | ||
| mflag.BoolVar(&useScheduler, []string{"scheduler"}, false, "Use scheduler to distribute tests across shards") | ||
| mflag.BoolVar(&runParallel, []string{"parallel"}, false, "Run tests in parallel on hosts where possible") | ||
| mflag.Parse() | ||
|
|
||
| tests, err := getTests(mflag.Args()) | ||
| if err != nil { | ||
| fmt.Printf("Error parsing tests: %v\n", err) | ||
| os.Exit(1) | ||
| } | ||
|
|
||
| hosts := strings.Fields(os.Getenv("HOSTS")) | ||
| maxHosts := len(hosts) | ||
| if maxHosts == 0 { | ||
| fmt.Print("No HOSTS specified.\n") | ||
| os.Exit(1) | ||
| } | ||
|
|
||
| var errored bool | ||
| if runParallel { | ||
| errored = parallel(tests, hosts) | ||
| } else { | ||
| errored = sequential(tests, hosts) | ||
| } | ||
|
|
||
| if errored { | ||
| os.Exit(1) | ||
| } | ||
| } |