agola/internal/services/executor/executor.go

1468 lines
35 KiB
Go

// Copyright 2019 Sorint.lab
//
// 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 executor
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/url"
"os"
"path/filepath"
"strings"
"sync"
"time"
"agola.io/agola/internal/common"
slog "agola.io/agola/internal/log"
"agola.io/agola/internal/services/config"
"agola.io/agola/internal/services/executor/driver"
"agola.io/agola/internal/services/executor/registry"
"agola.io/agola/internal/util"
rsclient "agola.io/agola/services/runservice/client"
"agola.io/agola/services/runservice/types"
uuid "github.com/satori/go.uuid"
"github.com/gorilla/mux"
sockaddr "github.com/hashicorp/go-sockaddr"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
errors "golang.org/x/xerrors"
)
var level = zap.NewAtomicLevelAt(zapcore.InfoLevel)
var logger = slog.New(level)
var log = logger.Sugar()
const (
defaultShell = "/bin/sh -e"
toolboxContainerDir = "/mnt/agola"
)
var (
toolboxContainerPath = filepath.Join(toolboxContainerDir, "/agola-toolbox")
)
func (e *Executor) getAllPods(ctx context.Context, all bool) ([]driver.Pod, error) {
return e.driver.GetPods(ctx, all)
}
func stepUser(t *types.ExecutorTask) string {
// use the container specified user and override with task user if defined
user := t.Spec.Containers[0].User
if t.Spec.User != "" {
user = t.Spec.User
}
return user
}
func (e *Executor) createFile(ctx context.Context, pod driver.Pod, command, user string, outf io.Writer) (string, error) {
cmd := []string{toolboxContainerPath, "createfile"}
var buf bytes.Buffer
execConfig := &driver.ExecConfig{
Cmd: cmd,
User: user,
AttachStdin: true,
Stdout: &buf,
Stderr: outf,
}
ce, err := pod.Exec(ctx, execConfig)
if err != nil {
return "", err
}
stdin := ce.Stdin()
go func() {
_, _ = io.WriteString(stdin, command+"\n")
stdin.Close()
}()
exitCode, err := ce.Wait(ctx)
if err != nil {
return "", err
}
if exitCode != 0 {
return "", errors.Errorf("toolbox exited with code: %d", exitCode)
}
return buf.String(), nil
}
func (e *Executor) doRunStep(ctx context.Context, s *types.RunStep, t *types.ExecutorTask, pod driver.Pod, logPath string) (int, error) {
if err := os.MkdirAll(filepath.Dir(logPath), 0770); err != nil {
return -1, err
}
outf, err := os.Create(logPath)
if err != nil {
return -1, err
}
defer outf.Close()
// TODO(sgotti) this line is used only for old runconfig versions that don't
// set a task default shell in the runconfig
shell := defaultShell
if t.Spec.Shell != "" {
shell = t.Spec.Shell
}
if s.Shell != "" {
shell = s.Shell
}
var cmd []string
if s.Command != "" {
filename, err := e.createFile(ctx, pod, s.Command, stepUser(t), outf)
if err != nil {
return -1, errors.Errorf("create file err: %v", err)
}
args := strings.Split(shell, " ")
cmd = append(args, filename)
} else {
cmd = strings.Split(shell, " ")
}
// override task working dir with runstep working dir if provided
workingDir := t.Spec.WorkingDir
if s.WorkingDir != "" {
workingDir = s.WorkingDir
}
// generate the environment using the task environment and then overriding with the runstep environment
environment := map[string]string{}
for envName, envValue := range t.Spec.Environment {
environment[envName] = envValue
}
for envName, envValue := range s.Environment {
environment[envName] = envValue
}
workingDir, err = e.expandDir(ctx, t, pod, outf, workingDir)
if err != nil {
_, _ = outf.WriteString(fmt.Sprintf("failed to expand working dir %q. Error: %s\n", workingDir, err))
return -1, err
}
execConfig := &driver.ExecConfig{
Cmd: cmd,
Env: environment,
WorkingDir: workingDir,
User: stepUser(t),
AttachStdin: true,
Stdout: outf,
Stderr: outf,
Tty: *s.Tty,
}
ce, err := pod.Exec(ctx, execConfig)
if err != nil {
return -1, err
}
exitCode, err := ce.Wait(ctx)
if err != nil {
return -1, err
}
return exitCode, nil
}
func (e *Executor) doSaveToWorkspaceStep(ctx context.Context, s *types.SaveToWorkspaceStep, t *types.ExecutorTask, pod driver.Pod, logPath string, archivePath string) (int, error) {
cmd := []string{toolboxContainerPath, "archive"}
if err := os.MkdirAll(filepath.Dir(logPath), 0770); err != nil {
return -1, err
}
logf, err := os.Create(logPath)
if err != nil {
return -1, err
}
defer logf.Close()
if err := os.MkdirAll(filepath.Dir(archivePath), 0770); err != nil {
return -1, err
}
archivef, err := os.Create(archivePath)
if err != nil {
return -1, err
}
defer archivef.Close()
workingDir, err := e.expandDir(ctx, t, pod, logf, t.Spec.WorkingDir)
if err != nil {
_, _ = logf.WriteString(fmt.Sprintf("failed to expand working dir %q. Error: %s\n", t.Spec.WorkingDir, err))
return -1, err
}
execConfig := &driver.ExecConfig{
Cmd: cmd,
Env: t.Spec.Environment,
WorkingDir: workingDir,
User: stepUser(t),
AttachStdin: true,
Stdout: archivef,
Stderr: logf,
}
ce, err := pod.Exec(ctx, execConfig)
if err != nil {
return -1, err
}
type ArchiveInfo struct {
SourceDir string
DestDir string
Paths []string
}
type Archive struct {
ArchiveInfos []*ArchiveInfo
OutFile string
}
a := &Archive{
OutFile: "", // use stdout
ArchiveInfos: make([]*ArchiveInfo, len(s.Contents)),
}
for i, c := range s.Contents {
a.ArchiveInfos[i] = &ArchiveInfo{
SourceDir: c.SourceDir,
DestDir: c.DestDir,
Paths: c.Paths,
}
}
stdin := ce.Stdin()
enc := json.NewEncoder(stdin)
go func() {
_ = enc.Encode(a)
stdin.Close()
}()
exitCode, err := ce.Wait(ctx)
if err != nil {
return -1, err
}
return exitCode, nil
}
func (e *Executor) expandDir(ctx context.Context, t *types.ExecutorTask, pod driver.Pod, logf io.Writer, dir string) (string, error) {
args := []string{dir}
cmd := append([]string{toolboxContainerPath, "expanddir"}, args...)
// limit the template answer to max 1MiB
stdout := &bytes.Buffer{}
execConfig := &driver.ExecConfig{
Cmd: cmd,
Env: t.Spec.Environment,
User: stepUser(t),
AttachStdin: true,
Stdout: stdout,
Stderr: logf,
}
ce, err := pod.Exec(ctx, execConfig)
if err != nil {
return "", err
}
exitCode, err := ce.Wait(ctx)
if err != nil {
return "", err
}
if exitCode != 0 {
return "", errors.Errorf("expanddir ended with exit code %d", exitCode)
}
return stdout.String(), nil
}
func (e *Executor) mkdir(ctx context.Context, t *types.ExecutorTask, pod driver.Pod, logf io.Writer, dir string) error {
args := []string{dir}
cmd := append([]string{toolboxContainerPath, "mkdir"}, args...)
execConfig := &driver.ExecConfig{
Cmd: cmd,
Env: t.Spec.Environment,
User: stepUser(t),
AttachStdin: true,
Stdout: logf,
Stderr: logf,
}
ce, err := pod.Exec(ctx, execConfig)
if err != nil {
return err
}
exitCode, err := ce.Wait(ctx)
if err != nil {
return err
}
if exitCode != 0 {
return errors.Errorf("mkdir ended with exit code %d", exitCode)
}
return nil
}
func (e *Executor) template(ctx context.Context, t *types.ExecutorTask, pod driver.Pod, logf io.Writer, key string) (string, error) {
cmd := []string{toolboxContainerPath, "template"}
// limit the template answer to max 1MiB
stdout := util.NewLimitedBuffer(1024 * 1024)
workingDir, err := e.expandDir(ctx, t, pod, logf, t.Spec.WorkingDir)
if err != nil {
_, _ = io.WriteString(logf, fmt.Sprintf("failed to expand working dir %q. Error: %s\n", t.Spec.WorkingDir, err))
return "", err
}
execConfig := &driver.ExecConfig{
Cmd: cmd,
Env: t.Spec.Environment,
WorkingDir: workingDir,
User: stepUser(t),
AttachStdin: true,
Stdout: stdout,
Stderr: logf,
}
ce, err := pod.Exec(ctx, execConfig)
if err != nil {
return "", err
}
stdin := ce.Stdin()
go func() {
_, _ = io.WriteString(stdin, key)
stdin.Close()
}()
exitCode, err := ce.Wait(ctx)
if err != nil {
return "", err
}
if exitCode != 0 {
return "", errors.Errorf("template ended with exit code %d", exitCode)
}
return stdout.String(), nil
}
func (e *Executor) unarchive(ctx context.Context, t *types.ExecutorTask, source io.Reader, pod driver.Pod, logf io.Writer, destDir string, overwrite, removeDestDir bool) error {
args := []string{"--destdir", destDir}
if overwrite {
args = append(args, "--overwrite")
}
if removeDestDir {
args = append(args, "--remove-destdir")
}
cmd := append([]string{toolboxContainerPath, "unarchive"}, args...)
workingDir, err := e.expandDir(ctx, t, pod, logf, t.Spec.WorkingDir)
if err != nil {
_, _ = io.WriteString(logf, fmt.Sprintf("failed to expand working dir %q. Error: %s\n", t.Spec.WorkingDir, err))
return err
}
execConfig := &driver.ExecConfig{
Cmd: cmd,
Env: t.Spec.Environment,
WorkingDir: workingDir,
User: stepUser(t),
AttachStdin: true,
Stdout: logf,
Stderr: logf,
}
ce, err := pod.Exec(ctx, execConfig)
if err != nil {
return err
}
stdin := ce.Stdin()
go func() {
_, _ = io.Copy(stdin, source)
stdin.Close()
}()
exitCode, err := ce.Wait(ctx)
if err != nil {
return err
}
if exitCode != 0 {
return errors.Errorf("unarchive ended with exit code %d", exitCode)
}
return nil
}
func (e *Executor) doRestoreWorkspaceStep(ctx context.Context, s *types.RestoreWorkspaceStep, t *types.ExecutorTask, pod driver.Pod, logPath string) (int, error) {
if err := os.MkdirAll(filepath.Dir(logPath), 0770); err != nil {
return -1, err
}
logf, err := os.Create(logPath)
if err != nil {
return -1, err
}
defer logf.Close()
for _, op := range t.Spec.WorkspaceOperations {
log.Debugf("unarchiving workspace for taskID: %s, step: %d", level, op.TaskID, op.Step)
resp, err := e.runserviceClient.GetArchive(ctx, op.TaskID, op.Step)
if err != nil {
// TODO(sgotti) retry before giving up
fmt.Fprintf(logf, "error reading workspace archive: %v\n", err)
return -1, err
}
archivef := resp.Body
if err := e.unarchive(ctx, t, archivef, pod, logf, s.DestDir, false, false); err != nil {
archivef.Close()
return -1, err
}
archivef.Close()
}
return 0, nil
}
func (e *Executor) doSaveCacheStep(ctx context.Context, s *types.SaveCacheStep, t *types.ExecutorTask, pod driver.Pod, logPath string, archivePath string) (int, error) {
cmd := []string{toolboxContainerPath, "archive"}
if err := os.MkdirAll(filepath.Dir(logPath), 0770); err != nil {
return -1, err
}
logf, err := os.Create(logPath)
if err != nil {
return -1, err
}
defer logf.Close()
save := false
// calculate key from template
userKey, err := e.template(ctx, t, pod, logf, s.Key)
if err != nil {
return -1, err
}
fmt.Fprintf(logf, "cache key %q\n", userKey)
// append cache prefix
key := t.Spec.CachePrefix + "-" + userKey
// check that the cache key doesn't already exists
resp, err := e.runserviceClient.CheckCache(ctx, key, false)
if err != nil {
// ignore 404 errors since they means that the cache key doesn't exists
if resp != nil && resp.StatusCode == http.StatusNotFound {
fmt.Fprintf(logf, "no cache available for key %q. Saving.\n", userKey)
save = true
} else {
// TODO(sgotti) retry before giving up
fmt.Fprintf(logf, "error checking for cache key %q: %v\n", userKey, err)
return -1, err
}
}
if !save {
fmt.Fprintf(logf, "cache for key %q already exists\n", userKey)
return 0, nil
}
fmt.Fprintf(logf, "archiving cache with key %q\n", userKey)
if err := os.MkdirAll(filepath.Dir(archivePath), 0770); err != nil {
return -1, err
}
archivef, err := os.Create(archivePath)
if err != nil {
return -1, err
}
defer archivef.Close()
workingDir, err := e.expandDir(ctx, t, pod, logf, t.Spec.WorkingDir)
if err != nil {
_, _ = io.WriteString(logf, fmt.Sprintf("failed to expand working dir %q. Error: %s\n", t.Spec.WorkingDir, err))
return -1, err
}
execConfig := &driver.ExecConfig{
Cmd: cmd,
Env: t.Spec.Environment,
WorkingDir: workingDir,
User: stepUser(t),
AttachStdin: true,
Stdout: archivef,
Stderr: logf,
}
ce, err := pod.Exec(ctx, execConfig)
if err != nil {
return -1, err
}
type ArchiveInfo struct {
SourceDir string
DestDir string
Paths []string
}
type Archive struct {
ArchiveInfos []*ArchiveInfo
OutFile string
}
a := &Archive{
OutFile: "", // use stdout
ArchiveInfos: make([]*ArchiveInfo, len(s.Contents)),
}
for i, c := range s.Contents {
a.ArchiveInfos[i] = &ArchiveInfo{
SourceDir: c.SourceDir,
DestDir: c.DestDir,
Paths: c.Paths,
}
}
stdin := ce.Stdin()
enc := json.NewEncoder(stdin)
go func() {
_ = enc.Encode(a)
stdin.Close()
}()
exitCode, err := ce.Wait(ctx)
if err != nil {
return -1, err
}
if exitCode != 0 {
return exitCode, errors.Errorf("save cache archiving command ended with exit code %d", exitCode)
}
f, err := os.Open(archivePath)
if err != nil {
return -1, err
}
fi, err := f.Stat()
if err != nil {
return -1, err
}
// send cache archive to scheduler
if resp, err := e.runserviceClient.PutCache(ctx, key, fi.Size(), f); err != nil {
if resp != nil && resp.StatusCode == http.StatusNotModified {
return exitCode, nil
}
return -1, err
}
return exitCode, nil
}
func (e *Executor) doRestoreCacheStep(ctx context.Context, s *types.RestoreCacheStep, t *types.ExecutorTask, pod driver.Pod, logPath string) (int, error) {
if err := os.MkdirAll(filepath.Dir(logPath), 0770); err != nil {
return -1, err
}
logf, err := os.Create(logPath)
if err != nil {
return -1, err
}
defer logf.Close()
fmt.Fprintf(logf, "restoring cache: %s\n", util.Dump(s))
for _, key := range s.Keys {
// calculate key from template
userKey, err := e.template(ctx, t, pod, logf, key)
if err != nil {
return -1, err
}
fmt.Fprintf(logf, "cache key %q\n", userKey)
// append cache prefix
key := t.Spec.CachePrefix + "-" + userKey
resp, err := e.runserviceClient.GetCache(ctx, key, true)
if err != nil {
// ignore 404 errors since they means that the cache key doesn't exists
if resp != nil && resp.StatusCode == http.StatusNotFound {
fmt.Fprintf(logf, "no cache available for key %q\n", userKey)
continue
}
// TODO(sgotti) retry before giving up
fmt.Fprintf(logf, "error reading cache: %v\n", err)
return -1, err
}
fmt.Fprintf(logf, "restoring cache with key %q\n", userKey)
cachef := resp.Body
if err := e.unarchive(ctx, t, cachef, pod, logf, s.DestDir, false, false); err != nil {
cachef.Close()
return -1, err
}
cachef.Close()
// stop here
break
}
return 0, nil
}
func (e *Executor) executorIDPath() string {
return filepath.Join(e.c.DataDir, "id")
}
func (e *Executor) tasksDir() string {
return filepath.Join(e.c.DataDir, "tasks")
}
func (e *Executor) taskPath(taskID string) string {
return filepath.Join(e.tasksDir(), taskID)
}
func (e *Executor) taskLogsPath(taskID string) string {
return filepath.Join(e.tasksDir(), taskID, "logs")
}
func (e *Executor) setupLogPath(taskID string) string {
return filepath.Join(e.taskLogsPath(taskID), "setup.log")
}
func (e *Executor) stepLogPath(taskID string, stepID int) string {
return filepath.Join(e.taskLogsPath(taskID), "steps", fmt.Sprintf("%d.log", stepID))
}
func (e *Executor) archivePath(taskID string, stepID int) string {
return filepath.Join(e.taskPath(taskID), "archives", fmt.Sprintf("%d.tar", stepID))
}
func (e *Executor) sendExecutorStatus(ctx context.Context) error {
labels := e.c.Labels
if labels == nil {
labels = make(map[string]string)
}
activeTasks := e.runningTasks.len()
archs, err := e.driver.Archs(ctx)
if err != nil {
return err
}
executorGroup, err := e.driver.ExecutorGroup(ctx)
if err != nil {
return err
}
// report all the executors that are active OR that have some owned pods not yet removed
activeExecutors, err := e.driver.GetExecutors(ctx)
if err != nil {
return err
}
pods, err := e.driver.GetPods(ctx, true)
if err != nil {
return err
}
executorsMap := map[string]struct{}{}
for _, executorID := range activeExecutors {
executorsMap[executorID] = struct{}{}
}
for _, pod := range pods {
executorsMap[pod.ExecutorID()] = struct{}{}
}
siblingsExecutors := []string{}
for executorID := range executorsMap {
siblingsExecutors = append(siblingsExecutors, executorID)
}
executor := &types.Executor{
ID: e.id,
Archs: archs,
AllowPrivilegedContainers: e.c.AllowPrivilegedContainers,
ListenURL: e.listenURL,
Labels: labels,
ActiveTasksLimit: e.c.ActiveTasksLimit,
ActiveTasks: activeTasks,
Dynamic: e.dynamic,
ExecutorGroup: executorGroup,
SiblingsExecutors: siblingsExecutors,
}
log.Debugf("send executor status: %s", util.Dump(executor))
_, err = e.runserviceClient.SendExecutorStatus(ctx, executor)
return err
}
func (e *Executor) sendExecutorTaskStatus(ctx context.Context, et *types.ExecutorTask) error {
log.Debugf("send executor task: %s. status: %s", et.ID, et.Status.Phase)
_, err := e.runserviceClient.SendExecutorTaskStatus(ctx, e.id, et)
return err
}
func (e *Executor) stopTask(ctx context.Context, et *types.ExecutorTask) {
if rt, ok := e.runningTasks.get(et.ID); ok {
rt.Lock()
defer rt.Unlock()
if rt.et.Status.Phase.IsFinished() {
return
}
if rt.pod != nil {
if err := rt.pod.Stop(ctx); err != nil {
log.Errorf("err: %+v", err)
return
}
if rt.et.Status.Phase == types.ExecutorTaskPhaseNotStarted {
rt.et.Status.Phase = types.ExecutorTaskPhaseCancelled
} else {
rt.et.Status.Phase = types.ExecutorTaskPhaseStopped
}
if err := e.sendExecutorTaskStatus(ctx, et); err != nil {
log.Errorf("err: %+v", err)
return
}
}
}
}
func (e *Executor) executeTask(ctx context.Context, et *types.ExecutorTask) {
// * save in local state that we have a running task
// * start the pod
// * then update the executortask status to in-progress
// if something fails pod will be cleaned up by the pod cleaner goroutine
// In this way we are sure that the pod cleaner will only remove pod that don't
// have an in progress running task
if et.Status.Phase != types.ExecutorTaskPhaseNotStarted {
log.Debugf("task phase is not \"not started\"")
return
}
activeTasks := e.runningTasks.len()
// don't start task if we have reached the active tasks limit
// they will be executed later
if activeTasks > e.c.ActiveTasksLimit {
return
}
rt := &runningTask{
et: et,
executing: true,
}
rt.Lock()
if !e.runningTasks.addIfNotExists(et.ID, rt) {
log.Debugf("task %s already running", et.ID)
rt.Unlock()
return
}
defer func() {
rt.Lock()
rt.executing = false
rt.Unlock()
}()
et.Status.Phase = types.ExecutorTaskPhaseRunning
et.Status.StartTime = util.TimeP(time.Now())
et.Status.SetupStep.Phase = types.ExecutorTaskPhaseRunning
et.Status.SetupStep.StartTime = util.TimeP(time.Now())
if err := e.sendExecutorTaskStatus(ctx, et); err != nil {
log.Errorf("err: %+v", err)
}
if err := e.setupTask(ctx, rt); err != nil {
log.Errorf("err: %+v", err)
et.Status.Phase = types.ExecutorTaskPhaseFailed
et.Status.EndTime = util.TimeP(time.Now())
et.Status.SetupStep.Phase = types.ExecutorTaskPhaseFailed
et.Status.SetupStep.EndTime = util.TimeP(time.Now())
if err := e.sendExecutorTaskStatus(ctx, et); err != nil {
log.Errorf("err: %+v", err)
}
rt.Unlock()
return
}
et.Status.SetupStep.Phase = types.ExecutorTaskPhaseSuccess
et.Status.SetupStep.EndTime = util.TimeP(time.Now())
if err := e.sendExecutorTaskStatus(ctx, et); err != nil {
log.Errorf("err: %+v", err)
}
rt.Unlock()
_, err := e.executeTaskSteps(ctx, rt, rt.pod)
rt.Lock()
if err != nil {
log.Errorf("err: %+v", err)
et.Status.Phase = types.ExecutorTaskPhaseFailed
} else {
et.Status.Phase = types.ExecutorTaskPhaseSuccess
}
et.Status.EndTime = util.TimeP(time.Now())
if err := e.sendExecutorTaskStatus(ctx, et); err != nil {
log.Errorf("err: %+v", err)
}
rt.Unlock()
}
func (e *Executor) setupTask(ctx context.Context, rt *runningTask) error {
et := rt.et
if err := os.RemoveAll(e.taskPath(et.ID)); err != nil {
return err
}
if err := os.MkdirAll(e.taskPath(et.ID), 0770); err != nil {
return err
}
setupLogPath := e.setupLogPath(et.ID)
if err := os.MkdirAll(filepath.Dir(setupLogPath), 0770); err != nil {
return err
}
outf, err := os.Create(setupLogPath)
if err != nil {
return err
}
defer outf.Close()
// error out if privileged containers are required but not allowed
requiresPrivilegedContainers := false
for _, c := range et.Spec.Containers {
if c.Privileged {
requiresPrivilegedContainers = true
break
}
}
if requiresPrivilegedContainers && !e.c.AllowPrivilegedContainers {
_, _ = outf.WriteString("Executor doesn't allow executing privileged containers.\n")
return errors.Errorf("executor doesn't allow executing privileged containers")
}
log.Debugf("starting pod")
dockerConfig, err := registry.GenDockerConfig(et.Spec.DockerRegistriesAuth, []string{et.Spec.Containers[0].Image})
if err != nil {
return err
}
podConfig := &driver.PodConfig{
// generate a random pod id (don't use task id for future ability to restart
// tasks failed to start and don't clash with existing pods)
ID: uuid.NewV4().String(),
TaskID: et.ID,
Arch: et.Spec.Arch,
InitVolumeDir: toolboxContainerDir,
DockerConfig: dockerConfig,
Containers: make([]*driver.ContainerConfig, len(et.Spec.Containers)),
}
for i, c := range et.Spec.Containers {
var cmd []string
if i == 0 {
cmd = []string{toolboxContainerPath, "sleeper"}
}
if c.Entrypoint != "" {
cmd = strings.Split(c.Entrypoint, " ")
}
containerConfig := &driver.ContainerConfig{
Image: c.Image,
Cmd: cmd,
Env: c.Environment,
User: c.User,
Privileged: c.Privileged,
Volumes: make([]driver.Volume, len(c.Volumes)),
}
for vIndex, cVol := range c.Volumes {
containerConfig.Volumes[vIndex] = driver.Volume{
Path: cVol.Path,
}
if cVol.TmpFS != nil {
containerConfig.Volumes[vIndex].TmpFS = &driver.VolumeTmpFS{
Size: cVol.TmpFS.Size,
}
}
}
podConfig.Containers[i] = containerConfig
}
_, _ = outf.WriteString("Starting pod.\n")
pod, err := e.driver.NewPod(ctx, podConfig, outf)
if err != nil {
_, _ = outf.WriteString(fmt.Sprintf("Pod failed to start. Error: %s\n", err))
return err
}
_, _ = outf.WriteString("Pod started.\n")
if et.Spec.WorkingDir != "" {
_, _ = outf.WriteString(fmt.Sprintf("Creating working dir %q.\n", et.Spec.WorkingDir))
if err := e.mkdir(ctx, et, pod, outf, et.Spec.WorkingDir); err != nil {
_, _ = outf.WriteString(fmt.Sprintf("Failed to create working dir %q. Error: %s\n", et.Spec.WorkingDir, err))
return err
}
}
rt.pod = pod
return nil
}
func (e *Executor) executeTaskSteps(ctx context.Context, rt *runningTask, pod driver.Pod) (int, error) {
for i, step := range rt.et.Spec.Steps {
rt.Lock()
rt.et.Status.Steps[i].Phase = types.ExecutorTaskPhaseRunning
rt.et.Status.Steps[i].StartTime = util.TimeP(time.Now())
if err := e.sendExecutorTaskStatus(ctx, rt.et); err != nil {
log.Errorf("err: %+v", err)
}
rt.Unlock()
var err error
var exitCode int
var stepName string
switch s := step.(type) {
case *types.RunStep:
log.Debugf("run step: %s", util.Dump(s))
stepName = s.Name
exitCode, err = e.doRunStep(ctx, s, rt.et, pod, e.stepLogPath(rt.et.ID, i))
case *types.SaveToWorkspaceStep:
log.Debugf("save to workspace step: %s", util.Dump(s))
stepName = s.Name
archivePath := e.archivePath(rt.et.ID, i)
exitCode, err = e.doSaveToWorkspaceStep(ctx, s, rt.et, pod, e.stepLogPath(rt.et.ID, i), archivePath)
case *types.RestoreWorkspaceStep:
log.Debugf("restore workspace step: %s", util.Dump(s))
stepName = s.Name
exitCode, err = e.doRestoreWorkspaceStep(ctx, s, rt.et, pod, e.stepLogPath(rt.et.ID, i))
case *types.SaveCacheStep:
log.Debugf("save cache step: %s", util.Dump(s))
stepName = s.Name
archivePath := e.archivePath(rt.et.ID, i)
exitCode, err = e.doSaveCacheStep(ctx, s, rt.et, pod, e.stepLogPath(rt.et.ID, i), archivePath)
case *types.RestoreCacheStep:
log.Debugf("restore cache step: %s", util.Dump(s))
stepName = s.Name
exitCode, err = e.doRestoreCacheStep(ctx, s, rt.et, pod, e.stepLogPath(rt.et.ID, i))
default:
return i, errors.Errorf("unknown step type: %s", util.Dump(s))
}
var serr error
rt.Lock()
rt.et.Status.Steps[i].EndTime = util.TimeP(time.Now())
rt.et.Status.Steps[i].Phase = types.ExecutorTaskPhaseSuccess
if err != nil {
if rt.et.Spec.Stop {
rt.et.Status.Steps[i].Phase = types.ExecutorTaskPhaseStopped
} else {
rt.et.Status.Steps[i].Phase = types.ExecutorTaskPhaseFailed
}
serr = errors.Errorf("failed to execute step %s: %w", util.Dump(step), err)
} else if exitCode != 0 {
rt.et.Status.Steps[i].Phase = types.ExecutorTaskPhaseFailed
rt.et.Status.Steps[i].ExitStatus = util.IntP(exitCode)
serr = errors.Errorf("step %q failed with exitcode %d", stepName, exitCode)
} else if exitCode == 0 {
rt.et.Status.Steps[i].ExitStatus = util.IntP(exitCode)
}
if err := e.sendExecutorTaskStatus(ctx, rt.et); err != nil {
log.Errorf("err: %+v", err)
}
rt.Unlock()
if serr != nil {
return i, serr
}
}
return 0, nil
}
func (e *Executor) podsCleanerLoop(ctx context.Context) {
for {
log.Debugf("podsCleaner")
if err := e.podsCleaner(ctx); err != nil {
log.Errorf("err: %+v", err)
}
sleepCh := time.NewTimer(1 * time.Second).C
select {
case <-ctx.Done():
return
case <-sleepCh:
}
}
}
func (e *Executor) podsCleaner(ctx context.Context) error {
pods, err := e.getAllPods(ctx, true)
if err != nil {
return err
}
executors, err := e.driver.GetExecutors(ctx)
if err != nil {
return err
}
// always add ourself to executors
executors = append(executors, e.id)
for _, pod := range pods {
taskID := pod.TaskID()
// clean our owned pods
if pod.ExecutorID() == e.id {
if _, ok := e.runningTasks.get(taskID); !ok {
log.Infof("removing pod %s for not running task: %s", pod.ID(), taskID)
_ = pod.Remove(ctx)
}
}
// if no executor owns the pod we'll delete it
owned := false
for _, executorID := range executors {
if pod.ExecutorID() == executorID {
owned = true
break
}
}
if !owned {
log.Infof("removing pod %s since it's not owned by any active executor", pod.ID())
_ = pod.Remove(ctx)
}
}
return nil
}
func (e *Executor) executorStatusSenderLoop(ctx context.Context) {
for {
log.Debugf("executorStatusSenderLoop")
if err := e.sendExecutorStatus(ctx); err != nil {
log.Errorf("err: %+v", err)
}
sleepCh := time.NewTimer(2 * time.Second).C
select {
case <-ctx.Done():
return
case <-sleepCh:
}
}
}
func (e *Executor) executorTasksStatusSenderLoop(ctx context.Context) {
for {
log.Debugf("executorTasksStatusSenderLoop")
for _, rtID := range e.runningTasks.ids() {
rt, ok := e.runningTasks.get(rtID)
if !ok {
continue
}
rt.Lock()
if err := e.sendExecutorTaskStatus(ctx, rt.et); err != nil {
log.Errorf("err: %+v", err)
rt.Unlock()
continue
}
// remove running task if send was successful and it's not executing
if !rt.executing {
e.runningTasks.delete(rtID)
}
rt.Unlock()
}
sleepCh := time.NewTimer(2 * time.Second).C
select {
case <-ctx.Done():
return
case <-sleepCh:
}
}
}
func (e *Executor) tasksUpdaterLoop(ctx context.Context) {
for {
log.Debugf("tasksUpdater")
if err := e.tasksUpdater(ctx); err != nil {
log.Errorf("err: %+v", err)
}
sleepCh := time.NewTimer(2 * time.Second).C
select {
case <-ctx.Done():
return
case <-sleepCh:
}
}
}
// taskUpdater fetches the executor tasks from the scheduler and handles them
// this is useful to catch up when some tasks submissions from the scheduler to the executor
// APIs fails
func (e *Executor) tasksUpdater(ctx context.Context) error {
ets, _, err := e.runserviceClient.GetExecutorTasks(ctx, e.id)
if err != nil {
log.Warnf("err: %v", err)
return err
}
log.Debugf("ets: %v", util.Dump(ets))
for _, et := range ets {
go e.taskUpdater(ctx, et)
}
// remove runningTasks not existing in the runservice
etIDsMap := map[string]struct{}{}
for _, et := range ets {
etIDsMap[et.ID] = struct{}{}
}
for _, rtID := range e.runningTasks.ids() {
if _, ok := etIDsMap[rtID]; !ok {
e.runningTasks.delete(rtID)
}
}
return nil
}
func (e *Executor) taskUpdater(ctx context.Context, et *types.ExecutorTask) {
log.Debugf("et: %v", util.Dump(et))
if et.Spec.ExecutorID != e.id {
return
}
if et.Spec.Stop {
e.stopTask(ctx, et)
}
if et.Status.Phase == types.ExecutorTaskPhaseNotStarted {
e.executeTask(ctx, et)
}
if et.Status.Phase == types.ExecutorTaskPhaseRunning {
_, ok := e.runningTasks.get(et.ID)
if !ok {
log.Infof("marking executor task %s as failed since there's no running task", et.ID)
et.Status.Phase = types.ExecutorTaskPhaseFailed
et.Status.EndTime = util.TimeP(time.Now())
// mark in progress step as failed too
for _, s := range et.Status.Steps {
if s.Phase == types.ExecutorTaskPhaseRunning {
s.Phase = types.ExecutorTaskPhaseFailed
s.EndTime = util.TimeP(time.Now())
}
}
if err := e.sendExecutorTaskStatus(ctx, et); err != nil {
log.Errorf("err: %+v", err)
}
}
}
}
func (e *Executor) tasksDataCleanerLoop(ctx context.Context) {
for {
log.Debugf("tasksDataCleaner")
if err := e.tasksDataCleaner(ctx); err != nil {
log.Errorf("err: %+v", err)
}
sleepCh := time.NewTimer(2 * time.Second).C
select {
case <-ctx.Done():
return
case <-sleepCh:
}
}
}
func (e *Executor) tasksDataCleaner(ctx context.Context) error {
entries, err := ioutil.ReadDir(e.tasksDir())
if err != nil {
return err
}
for _, entry := range entries {
if !entry.IsDir() {
continue
}
etID := filepath.Base(entry.Name())
_, resp, err := e.runserviceClient.GetExecutorTask(ctx, e.id, etID)
if err != nil {
if resp == nil {
return err
}
if resp.StatusCode != http.StatusNotFound {
return err
}
}
if resp.StatusCode == http.StatusNotFound {
taskDir := e.taskPath(etID)
log.Infof("removing task dir %q", taskDir)
// remove task dir
if err := os.RemoveAll(taskDir); err != nil {
return err
}
}
}
return nil
}
type runningTasks struct {
tasks map[string]*runningTask
m sync.Mutex
}
type runningTask struct {
sync.Mutex
et *types.ExecutorTask
pod driver.Pod
executing bool
}
func (r *runningTasks) get(rtID string) (*runningTask, bool) {
r.m.Lock()
defer r.m.Unlock()
rt, ok := r.tasks[rtID]
return rt, ok
}
func (r *runningTasks) addIfNotExists(rtID string, rt *runningTask) bool {
r.m.Lock()
defer r.m.Unlock()
if _, ok := r.tasks[rtID]; ok {
return false
}
r.tasks[rtID] = rt
return true
}
func (r *runningTasks) delete(rtID string) {
r.m.Lock()
defer r.m.Unlock()
delete(r.tasks, rtID)
}
func (r *runningTasks) len() int {
r.m.Lock()
defer r.m.Unlock()
return len(r.tasks)
}
func (r *runningTasks) ids() []string {
ids := []string{}
r.m.Lock()
defer r.m.Unlock()
for id := range r.tasks {
ids = append(ids, id)
}
return ids
}
func (e *Executor) handleTasks(ctx context.Context, c <-chan *types.ExecutorTask) {
for et := range c {
go e.executeTask(ctx, et)
}
}
func (e *Executor) getExecutorID() (string, error) {
id, err := ioutil.ReadFile(e.executorIDPath())
if err != nil && !os.IsNotExist(err) {
return "", err
}
return string(id), nil
}
func (e *Executor) saveExecutorID(id string) error {
if err := common.WriteFileAtomic(e.executorIDPath(), []byte(id), 0660); err != nil {
return errors.Errorf("failed to write executor id file: %w", err)
}
return nil
}
type Executor struct {
c *config.Executor
runserviceClient *rsclient.Client
id string
runningTasks *runningTasks
driver driver.Driver
listenAddress string
listenURL string
dynamic bool
}
func NewExecutor(c *config.Executor) (*Executor, error) {
if c.Debug {
level.SetLevel(zapcore.DebugLevel)
}
var err error
c.ToolboxPath, err = filepath.Abs(c.ToolboxPath)
if err != nil {
return nil, errors.Errorf("cannot determine \"agola-toolbox\" absolute path: %w", err)
}
e := &Executor{
c: c,
runserviceClient: rsclient.NewClient(c.RunserviceURL),
runningTasks: &runningTasks{
tasks: make(map[string]*runningTask),
},
}
if err := os.MkdirAll(e.tasksDir(), 0770); err != nil {
return nil, err
}
id, err := e.getExecutorID()
if err != nil {
return nil, err
}
if id == "" {
id = uuid.NewV4().String()
if err := e.saveExecutorID(id); err != nil {
return nil, err
}
}
e.id = id
// TODO(sgotti) now the first available private ip will be used and the executor will bind to the wildcard address
// improve this to let the user define the bind and the advertize address
addr, err := sockaddr.GetPrivateIP()
if err != nil {
return nil, errors.Errorf("cannot discover executor listen address: %w", err)
}
if addr == "" {
return nil, errors.Errorf("cannot discover executor listen address")
}
u := url.URL{Scheme: "http"}
if c.Web.TLS {
u.Scheme = "https"
}
_, port, err := net.SplitHostPort(c.Web.ListenAddress)
if err != nil {
return nil, errors.Errorf("cannot get web listen port: %w", err)
}
u.Host = net.JoinHostPort(addr, port)
e.listenURL = u.String()
e.listenAddress = fmt.Sprintf(":%s", port)
var d driver.Driver
switch c.Driver.Type {
case config.DriverTypeDocker:
d, err = driver.NewDockerDriver(logger, e.id, "/tmp/agola/bin", e.c.ToolboxPath)
if err != nil {
return nil, errors.Errorf("failed to create docker driver: %w", err)
}
case config.DriverTypeK8s:
d, err = driver.NewK8sDriver(logger, e.id, c.ToolboxPath)
if err != nil {
return nil, errors.Errorf("failed to create kubernetes driver: %w", err)
}
e.dynamic = true
default:
return nil, errors.Errorf("unknown driver type %q", c.Driver.Type)
}
e.driver = d
return e, nil
}
func (e *Executor) Run(ctx context.Context) error {
if err := e.driver.Setup(ctx); err != nil {
return err
}
ch := make(chan *types.ExecutorTask)
schedulerHandler := NewTaskSubmissionHandler(ch)
logsHandler := NewLogsHandler(logger, e)
archivesHandler := NewArchivesHandler(e)
router := mux.NewRouter()
apirouter := router.PathPrefix("/api/v1alpha").Subrouter()
apirouter.Handle("/executor", schedulerHandler).Methods("POST")
apirouter.Handle("/executor/logs", logsHandler).Methods("GET")
apirouter.Handle("/executor/archives", archivesHandler).Methods("GET")
go e.executorStatusSenderLoop(ctx)
go e.executorTasksStatusSenderLoop(ctx)
go e.podsCleanerLoop(ctx)
go e.tasksUpdaterLoop(ctx)
go e.tasksDataCleanerLoop(ctx)
go e.handleTasks(ctx, ch)
httpServer := http.Server{
Addr: e.listenAddress,
Handler: apirouter,
}
lerrCh := make(chan error)
go func() {
lerrCh <- httpServer.ListenAndServe()
}()
select {
case <-ctx.Done():
log.Infof("runservice executor exiting")
httpServer.Close()
case err := <-lerrCh:
if err != nil {
log.Errorf("http server listen error: %v", err)
return err
}
}
return nil
}