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Ephemeral CI run API #80

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Ephemeral CI run API #80

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aee94ec
starting work
frcepeda Apr 30, 2022
8e9e06e
ephemeral?
frcepeda Apr 30, 2022
a573cd9
nit
frcepeda Apr 30, 2022
4191e7c
extra comment
frcepeda Apr 30, 2022
bc8c91d
uhhh
frcepeda May 1, 2022
38fc037
starting tests
frcepeda May 1, 2022
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255 changes: 179 additions & 76 deletions cmd/omegaup-grader/ci.go
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Original file line number Diff line number Diff line change
@@ -1,16 +1,20 @@
package main

import (
"archive/zip"
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"math/big"
"net/http"
"os"
"path"
"regexp"
"time"

"github.com/google/uuid"
git "github.com/libgit2/git2go/v33"

base "github.com/omegaup/go-base/v3"
Expand All @@ -20,20 +24,22 @@ import (
)

var (
ciURLRegexp = regexp.MustCompile(`^/ci/problem/([a-zA-Z0-9-_]+)/([0-9a-f]{40})/$`)
ciGitURLRegexp = regexp.MustCompile(`^/ci/problem/([a-zA-Z0-9-_]+)/([0-9a-f]{40})/$`)
ciEphemeralURLRegexp = regexp.MustCompile(`^/ci/ephemeral/(([0-9a-f-]{36})/)?$`)
)

type reportWithPath struct {
report *ci.Report
path string
type startedCIRequest struct {
report *ci.Report
path string
problemFiles *common.ProblemFiles
}

type ciHandler struct {
ephemeralRunManager *grader.EphemeralRunManager
ctx *grader.Context
lruCache *ci.LRUCache
stopChan chan struct{}
reportChan chan *reportWithPath
requestChan chan *startedCIRequest
doneChan chan struct{}
}

Expand All @@ -47,32 +53,52 @@ func (h *ciHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
},
)

if r.Method != http.MethodGet {
w.WriteHeader(http.StatusMethodNotAllowed)
return
report := &ci.Report{
StartTime: time.Now(),
State: ci.StateWaiting,
}

match := ciURLRegexp.FindStringSubmatch(r.URL.Path)
if match == nil {
var expectedMethod string

if match := ciGitURLRegexp.FindStringSubmatch(r.URL.Path); match != nil {

report.IsEphemeral = false
report.Problem = match[1]
report.Hash = match[2]
expectedMethod = http.MethodGet

} else if match := ciEphemeralURLRegexp.FindStringSubmatch(r.URL.Path); match != nil {

report.IsEphemeral = true
report.Problem = "+ephemeral+"

if len(match) > 3 {
expectedMethod = http.MethodGet
report.Hash = match[3]
} else {
expectedMethod = http.MethodPost
report.Hash = uuid.New().String()
}

} else {
w.WriteHeader(http.StatusNotFound)
return
}

report := &ci.Report{
Problem: match[1],
CommitHash: match[2],
StartTime: time.Now(),
State: ci.StateWaiting,
if r.Method != expectedMethod {
w.WriteHeader(http.StatusMethodNotAllowed)
return
}

reportPath := path.Join(
ctx.Config.Grader.RuntimePath,
"ci",
report.Problem,
report.CommitHash[:2],
report.CommitHash[2:],
report.Hash[:2],
report.Hash[2:],
"report.json.gz",
)

if fd, err := os.Open(reportPath); err == nil {
defer fd.Close()

Expand All @@ -89,6 +115,11 @@ func (h *ciHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
return
}

if r.Method == http.MethodPost {
w.WriteHeader(http.StatusBadRequest)
return
}

w.Header().Add("Content-Type", "application/json")
w.Header().Add("Content-Encoding", "gzip")
http.ServeContent(w, r, reportPath, st.ModTime(), fd)
Expand All @@ -97,49 +128,104 @@ func (h *ciHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {

// Do the barest minimum checks before fully committing to making this CI
// run.
repository, err := git.OpenRepository(grader.GetRepositoryPath(
ctx.Config.Grader.RuntimePath,
report.Problem,
))
if err != nil {
ctx.Log.Error(
"failed to open repository",
map[string]interface{}{
"filename": reportPath,
"err": err,
},
)
w.WriteHeader(http.StatusNotFound)
return
}
defer repository.Free()
commitID, err := git.NewOid(report.CommitHash)
if err != nil {
ctx.Log.Error(
"failed to parse commit",
map[string]interface{}{
"filename": reportPath,
"commit": report.CommitHash,
"err": err,
},
)
w.WriteHeader(http.StatusNotFound)
return
}
commit, err := repository.LookupCommit(commitID)
if err != nil {
ctx.Log.Error(
"failed to lookup commit",
map[string]interface{}{
"filename": reportPath,
"commit": report.CommitHash,
"err": err,
},
)
w.WriteHeader(http.StatusNotFound)
return

// todo(frcepeda): check with frontend for rate limiting

var problemFiles *common.ProblemFiles

if report.IsEphemeral {
r.ParseMultipartForm((base.Byte(150) * base.Mebibyte).Bytes())
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todo poner estos en un lugar más mono, pero no sé donde 🙃

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esto va a timeoutear bien recio :/ tenemos problemas para subir zips grandes, así que esto va a estar súper flaky.

además que andar mandando zips de más de 100 MiB nos va a salir bastante caro ^^;; así que realísticamente sólo podríamos permitir como uno de estos por minuto, lo cual suena medio inútil para fines de CI.

problemZip, _, err := r.FormFile("problem.zip")

if err != nil {
ctx.Log.Error(
"failed to load problem package",
map[string]interface{}{
"filename": reportPath,
"err": err,
},
)
w.WriteHeader(http.StatusInternalServerError)
return
}
defer problemZip.Close()

limit := (base.Byte(100) * base.Mebibyte).Bytes()
buf := make([]byte, limit)
bufSize, err := io.ReadFull(io.LimitReader(problemZip, limit), buf)

if err != io.ErrUnexpectedEOF {
ctx.Log.Error(
"problem package too large",
map[string]interface{}{
"filename": reportPath,
"err": err,
},
)
w.WriteHeader(http.StatusRequestEntityTooLarge)
return
}

zipReader, err := zip.NewReader(bytes.NewReader(buf), int64(bufSize))
if err != nil {
ctx.Log.Error(
"failed to load problem package",
map[string]interface{}{
"filename": reportPath,
"err": err,
},
)
w.WriteHeader(http.StatusInternalServerError)
return
}

p := common.NewProblemFilesFromZip(zipReader, "<memory>")
problemFiles = &p
} else {
repository, err := git.OpenRepository(grader.GetRepositoryPath(
ctx.Config.Grader.RuntimePath,
report.Problem,
))
if err != nil {
ctx.Log.Error(
"failed to open repository",
map[string]interface{}{
"filename": reportPath,
"err": err,
},
)
w.WriteHeader(http.StatusNotFound)
return
}
defer repository.Free()
commitID, err := git.NewOid(report.Hash)
if err != nil {
ctx.Log.Error(
"failed to parse commit",
map[string]interface{}{
"filename": reportPath,
"commit": report.Hash,
"err": err,
},
)
w.WriteHeader(http.StatusNotFound)
return
}
commit, err := repository.LookupCommit(commitID)
if err != nil {
ctx.Log.Error(
"failed to lookup commit",
map[string]interface{}{
"filename": reportPath,
"commit": report.Hash,
"err": err,
},
)
w.WriteHeader(http.StatusNotFound)
return
}
defer commit.Free()
}
defer commit.Free()

ctx.Metrics.CounterAdd("grader_ci_jobs_total", 1)

Expand Down Expand Up @@ -200,9 +286,10 @@ func (h *ciHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
}

// Transfer the run to processCIRequest.
h.reportChan <- &reportWithPath{
report: report,
path: reportPath,
h.requestChan <- &startedCIRequest{
report: report,
path: reportPath,
problemFiles: problemFiles,
}
}

Expand Down Expand Up @@ -376,6 +463,7 @@ func (h *ciHandler) runTest(
func (h *ciHandler) processCIRequest(
report *ci.Report,
reportPath string,
problemFiles *common.ProblemFiles,
runs *grader.Queue,
) {
ctx := h.ctx.Wrap(context.TODO())
Expand All @@ -385,16 +473,28 @@ func (h *ciHandler) processCIRequest(
"report": report,
},
)
problemFiles, err := common.NewProblemFilesFromGit(
grader.GetRepositoryPath(
ctx.Config.Grader.RuntimePath,
report.Problem,
),
report.CommitHash,
)

var err error

if report.IsEphemeral {
if problemFiles == nil {
err = fmt.Errorf("Missing problem files for ephemeral run")
}
} else {
p, tmpE := common.NewProblemFilesFromGit(
grader.GetRepositoryPath(
ctx.Config.Grader.RuntimePath,
report.Problem,
),
report.Hash,
)
problemFiles = &p
err = tmpE
}

if err != nil {
ctx.Log.Error(
"Failed to validate commit",
"Failed to validate problem files",
map[string]interface{}{
"err": err,
},
Expand All @@ -418,10 +518,12 @@ func (h *ciHandler) processCIRequest(
}
return
}
ciRunConfig, err := ci.NewRunConfig(problemFiles, false)

ciRunConfig, err := ci.NewRunConfig(*problemFiles, false)

if err != nil {
ctx.Log.Error(
"Failed to validate commit",
"Failed to validate problem",
map[string]interface{}{
"err": err,
},
Expand Down Expand Up @@ -449,6 +551,7 @@ func (h *ciHandler) processCIRequest(
}
return
}

for _, testConfig := range ciRunConfig.TestConfigs {
report.Tests = append(report.Tests, testConfig.Test)
}
Expand Down Expand Up @@ -519,7 +622,7 @@ func (h *ciHandler) processCIRequest(

h.lruCache.AddRun(
path.Dir(reportPath),
fmt.Sprintf("%s/%s", report.Problem, report.CommitHash),
fmt.Sprintf("%s/%s", report.Problem, report.Hash),
)
}

Expand Down Expand Up @@ -554,8 +657,8 @@ func (h *ciHandler) run() {
close(h.doneChan)
return

case report := <-h.reportChan:
h.processCIRequest(report.report, report.path, runs)
case request := <-h.requestChan:
h.processCIRequest(request.report, request.path, request.problemFiles, runs)
}
}
}
Expand All @@ -581,7 +684,7 @@ func registerCIHandlers(
ctx: ctx,
lruCache: ci.NewLRUCache(ctx.Config.Grader.CI.CISizeLimit, ctx.Log),
stopChan: make(chan struct{}),
reportChan: make(chan *reportWithPath, 128),
requestChan: make(chan *startedCIRequest, 128),
doneChan: make(chan struct{}),
}
mux.Handle(ctx.Tracing.WrapHandle("/ci/", ciHandler))
Expand Down
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