feat(server): workflow runner with parallel fan-out and env threading

This commit is contained in:
2026-07-20 11:37:04 +01:00
parent 600126a913
commit 296e0179cb
2 changed files with 397 additions and 0 deletions
+6
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@@ -62,6 +62,12 @@ func (d *commandDispatcher) dispatch(serverID string, cmd *pb.ServerCommand) err
}
}
// DispatchRunStep pushes a RunStepCmd to a server's agent. Caller must have
// registered StepResults.Await(commandID) first.
func DispatchRunStep(serverID, commandID string, cmd *pb.RunStepCmd) error {
return Dispatcher.dispatch(serverID, &pb.ServerCommand{CommandId: commandID, RunStep: cmd})
}
// KeyGenParams carries all options for a generate-key command.
type KeyGenParams struct {
Label string
+391
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@@ -0,0 +1,391 @@
package services
import (
"fmt"
"strings"
"time"
"github.com/google/uuid"
"github.com/mrhid6/vantage/server/internal/db"
"github.com/mrhid6/vantage/server/internal/grpc/pb"
"github.com/mrhid6/vantage/server/internal/models"
"go.mongodb.org/mongo-driver/v2/bson"
"go.mongodb.org/mongo-driver/v2/mongo"
"go.mongodb.org/mongo-driver/v2/mongo/options"
)
const stepDispatchGrace = 15 * time.Second
// TriggerWorkflow snapshots the workflow, creates a run doc, and starts a
// background goroutine per target server (parallel fan-out). Returns run_id.
func TriggerWorkflow(workflowID, actor string) (string, error) {
wf, err := GetWorkflow(workflowID)
if err != nil {
return "", err
}
if len(wf.TargetServerIDs) == 0 {
return "", fmt.Errorf("workflow has no target servers")
}
if len(wf.Steps) == 0 {
return "", fmt.Errorf("workflow has no steps")
}
// Reject a concurrent run of the same workflow.
ctx, cancel := wfCtx()
running := db.Col("workflow_runs").FindOne(ctx, bson.M{"workflow_id": workflowID, "status": "running"})
cancel()
if running.Err() == nil {
return "", fmt.Errorf("workflow already has a run in progress")
}
resolved, err := resolveSteps(wf)
if err != nil {
return "", err
}
run := models.WorkflowRun{
RunID: uuid.New().String(),
WorkflowID: workflowID,
Name: wf.Name,
Steps: resolved,
Status: "running",
TriggeredBy: actor,
StartedAt: time.Now(),
ServerRuns: make([]models.ServerRun, 0, len(wf.TargetServerIDs)),
}
for _, sid := range wf.TargetServerIDs {
hostname := sid
if s, e := GetServer(sid); e == nil {
hostname = s.Hostname
}
sr := models.ServerRun{ServerID: sid, Hostname: hostname, Status: "queued", RunEnv: map[string]string{}}
for _, rs := range resolved {
sr.Steps = append(sr.Steps, models.StepRun{Order: rs.Order, Name: rs.Name, Status: "queued", OutputEnv: map[string]string{}})
}
run.ServerRuns = append(run.ServerRuns, sr)
}
ictx, icancel := wfCtx()
defer icancel()
if _, err := db.Col("workflow_runs").InsertOne(ictx, run); err != nil {
return "", err
}
go executeRun(run.RunID)
return run.RunID, nil
}
// resolveSteps freezes each workflow step ref into a ResolvedStep by loading the
// library step and applying overrides.
func resolveSteps(wf *models.Workflow) ([]models.ResolvedStep, error) {
ctx, cancel := wfCtx()
defer cancel()
out := make([]models.ResolvedStep, 0, len(wf.Steps))
for _, ref := range wf.Steps {
lib, err := getStep(ctx, ref.StepID)
if err != nil {
return nil, err
}
rs := models.ResolvedStep{
Order: ref.Order,
Name: lib.Name,
Interpreter: lib.Interpreter,
Script: lib.Script,
SecretRefs: lib.SecretRefs,
OnFailure: ref.OnFailure,
MaxRetries: ref.MaxRetries,
}
if ref.Overrides != nil {
if ref.Overrides.Script != nil {
rs.Script = *ref.Overrides.Script
}
if ref.Overrides.SecretRefs != nil {
rs.SecretRefs = ref.Overrides.SecretRefs
}
}
if rs.OnFailure == "" {
rs.OnFailure = "stop"
}
out = append(out, rs)
}
return out, nil
}
// executeRun fans out one goroutine per server run and waits for all to finish.
func executeRun(runID string) {
run, err := GetRun(runID)
if err != nil {
return
}
done := make(chan int, len(run.ServerRuns))
for i := range run.ServerRuns {
go func(idx int) {
runServer(runID, idx, run.Steps, run.ServerRuns[idx].ServerID)
done <- idx
}(i)
}
for range run.ServerRuns {
<-done
}
// Aggregate status.
final, _ := GetRun(runID)
status := "success"
for _, sr := range final.ServerRuns {
if sr.Status == "failed" {
status = "failed"
}
}
now := time.Now()
ctx, cancel := wfCtx()
defer cancel()
_, _ = db.Col("workflow_runs").UpdateOne(ctx, bson.M{"run_id": runID},
bson.M{"$set": bson.M{"status": status, "finished_at": now}})
}
// runServer executes the resolved steps sequentially on one server, threading
// output env forward and applying per-step failure policy.
func runServer(runID string, srvIdx int, steps []models.ResolvedStep, serverID string) {
now := time.Now()
setServerRun(runID, srvIdx, bson.M{"server_runs.$.status": "running", "server_runs.$.started_at": now})
if !Dispatcher.IsConnected(serverID) {
fin := time.Now()
setServerRun(runID, srvIdx, bson.M{"server_runs.$.status": "skipped", "server_runs.$.finished_at": fin})
return
}
runEnv := map[string]string{}
serverFailed := false
for i, step := range steps {
startStep(runID, serverID, i, "running")
var res *pb.StepResult
attempts := 0
maxAttempts := 1
if step.OnFailure == "retry" {
maxAttempts = step.MaxRetries + 1
}
// Merge secrets into command env (kept out of persisted logs).
secretVals := resolveSecrets(step.SecretRefs)
cmdEnv := map[string]string{}
for k, v := range runEnv {
cmdEnv[k] = v
}
for k, v := range secretVals {
cmdEnv[k] = v
}
for attempts < maxAttempts {
attempts++
res = dispatchAndWait(serverID, &pb.RunStepCmd{
Interpreter: step.Interpreter,
Script: step.Script,
Env: cmdEnv,
TimeoutSeconds: 0,
})
if res != nil && res.ExitCode == 0 {
break
}
}
// Mask secret values before persisting.
stdout, stderr := "", ""
exit := 1
outEnv := map[string]string{}
if res != nil {
stdout = maskSecrets(res.Stdout, secretVals)
stderr = maskSecrets(res.Stderr, secretVals)
exit = res.ExitCode
for k, v := range res.OutputEnv {
outEnv[k] = v
runEnv[k] = v // implicit: all outputs flow to all later steps
}
} else {
stderr = "[vantage] agent did not return a result"
}
status := "success"
if exit != 0 {
status = "failed"
}
finishStep(runID, serverID, i, status, attempts, exit, stdout, stderr, outEnv)
if exit != 0 {
switch step.OnFailure {
case "continue":
// keep going
default: // "stop" or exhausted "retry"
serverFailed = true
}
if serverFailed {
markRemainingSkipped(runID, serverID, i+1)
break
}
}
}
fin := time.Now()
status := "success"
if serverFailed {
status = "failed"
}
setServerRun(runID, srvIdx, bson.M{
"server_runs.$.status": status,
"server_runs.$.finished_at": fin,
"server_runs.$.run_env": runEnv,
})
}
// dispatchAndWait registers a waiter, dispatches the step, and blocks for the
// result or a timeout.
func dispatchAndWait(serverID string, cmd *pb.RunStepCmd) *pb.StepResult {
commandID := uuid.New().String()
ch := StepResults.Await(commandID)
if err := DispatchRunStep(serverID, commandID, cmd); err != nil {
StepResults.Cancel(commandID)
return &pb.StepResult{ExitCode: 1, Stderr: "[vantage] dispatch failed: " + err.Error()}
}
wait := time.Duration(cmd.TimeoutSeconds)*time.Second + stepDispatchGrace
if cmd.TimeoutSeconds == 0 {
wait = 30*time.Minute + stepDispatchGrace
}
select {
case res := <-ch:
return res
case <-time.After(wait):
StepResults.Cancel(commandID)
return &pb.StepResult{ExitCode: 124, Stderr: "[vantage] timed out waiting for agent result"}
}
}
func resolveSecrets(refs []string) map[string]string {
out := map[string]string{}
for _, ref := range refs {
// ref format "group/KEY"; resolve via RevealSecret.
parts := strings.SplitN(ref, "/", 2)
if len(parts) != 2 {
continue
}
if v, err := RevealSecret(parts[0], parts[1]); err == nil {
out[parts[1]] = v
}
}
return out
}
func maskSecrets(s string, secrets map[string]string) string {
for _, v := range secrets {
if v == "" {
continue
}
s = strings.ReplaceAll(s, v, "***")
}
return s
}
// ---- run doc mutation helpers ----
func setServerRun(runID string, srvIdx int, set bson.M) {
ctx, cancel := wfCtx()
defer cancel()
_, _ = db.Col("workflow_runs").UpdateOne(ctx,
bson.M{"run_id": runID, "server_runs.server_id": serverIDAt(runID, srvIdx)},
bson.M{"$set": set})
}
// serverIDAt returns the server_id at an index (positional operator needs a match).
func serverIDAt(runID string, srvIdx int) string {
r, err := GetRun(runID)
if err != nil || srvIdx >= len(r.ServerRuns) {
return ""
}
return r.ServerRuns[srvIdx].ServerID
}
func startStep(runID, serverID string, order int, status string) {
now := time.Now()
updateStep(runID, serverID, order, bson.M{
"server_runs.$[s].steps.$[t].status": status,
"server_runs.$[s].steps.$[t].started_at": now,
})
}
func finishStep(runID, serverID string, order int, status string, attempts, exit int, stdout, stderr string, outEnv map[string]string) {
now := time.Now()
updateStep(runID, serverID, order, bson.M{
"server_runs.$[s].steps.$[t].status": status,
"server_runs.$[s].steps.$[t].attempts": attempts,
"server_runs.$[s].steps.$[t].exit_code": exit,
"server_runs.$[s].steps.$[t].stdout": stdout,
"server_runs.$[s].steps.$[t].stderr": stderr,
"server_runs.$[s].steps.$[t].output_env": outEnv,
"server_runs.$[s].steps.$[t].finished_at": now,
})
}
func markRemainingSkipped(runID, serverID string, fromOrder int) {
ctx, cancel := wfCtx()
defer cancel()
_, _ = db.Col("workflow_runs").UpdateMany(ctx,
bson.M{"run_id": runID},
bson.M{"$set": bson.M{"server_runs.$[s].steps.$[t].status": "skipped"}},
options.UpdateMany().SetArrayFilters([]interface{}{
bson.M{"s.server_id": serverID},
bson.M{"t.order": bson.M{"$gte": fromOrder}, "t.status": "queued"},
}),
)
}
func updateStep(runID, serverID string, order int, set bson.M) {
ctx, cancel := wfCtx()
defer cancel()
_, _ = db.Col("workflow_runs").UpdateOne(ctx,
bson.M{"run_id": runID},
bson.M{"$set": set},
options.UpdateOne().SetArrayFilters([]interface{}{
bson.M{"s.server_id": serverID},
bson.M{"t.order": order},
}),
)
}
// ---- reads ----
func GetRun(runID string) (*models.WorkflowRun, error) {
ctx, cancel := wfCtx()
defer cancel()
var r models.WorkflowRun
err := db.Col("workflow_runs").FindOne(ctx, bson.M{"run_id": runID}).Decode(&r)
if err == mongo.ErrNoDocuments {
return nil, fmt.Errorf("run not found")
}
return &r, err
}
func ListRuns(workflowID string, limit int64) ([]models.WorkflowRun, error) {
ctx, cancel := wfCtx()
defer cancel()
cur, err := db.Col("workflow_runs").Find(ctx, bson.M{"workflow_id": workflowID},
options.Find().SetSort(bson.D{{Key: "started_at", Value: -1}}).SetLimit(limit))
if err != nil {
return nil, err
}
defer cur.Close(ctx)
runs := []models.WorkflowRun{}
if err := cur.All(ctx, &runs); err != nil {
return nil, err
}
return runs, nil
}
func CancelRun(runID string) error {
now := time.Now()
ctx, cancel := wfCtx()
defer cancel()
_, err := db.Col("workflow_runs").UpdateOne(ctx,
bson.M{"run_id": runID, "status": "running"},
bson.M{"$set": bson.M{"status": "cancelled", "finished_at": now}})
return err
}