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Merge pull request #1954 from bradrydzewski/master
implement jsonrpc2 agent behind feature flag
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,206 @@ | ||
| package agent | ||
|
|
||
| import ( | ||
| "context" | ||
| "io" | ||
| "log" | ||
| "net/url" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/cncd/pipeline/pipeline" | ||
| "github.com/cncd/pipeline/pipeline/backend" | ||
| "github.com/cncd/pipeline/pipeline/backend/docker" | ||
| "github.com/cncd/pipeline/pipeline/interrupt" | ||
| "github.com/cncd/pipeline/pipeline/multipart" | ||
| "github.com/cncd/pipeline/pipeline/rpc" | ||
|
|
||
| "github.com/codegangsta/cli" | ||
| "github.com/tevino/abool" | ||
| ) | ||
|
|
||
| func loop(c *cli.Context) error { | ||
| endpoint, err := url.Parse( | ||
| c.String("drone-server"), | ||
| ) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| filter := rpc.Filter{ | ||
| Labels: map[string]string{ | ||
| "platform": c.String("platform"), | ||
| }, | ||
| } | ||
|
|
||
| client, err := rpc.NewClient( | ||
| endpoint.String(), | ||
| rpc.WithRetryLimit( | ||
| c.Int("retry-limit"), | ||
| ), | ||
| rpc.WithBackoff( | ||
| c.Duration("backoff"), | ||
| ), | ||
| rpc.WithToken( | ||
| c.String("drone-secret"), | ||
| ), | ||
| ) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer client.Close() | ||
|
|
||
| sigterm := abool.New() | ||
| ctx := context.Background() | ||
| ctx = interrupt.WithContextFunc(ctx, func() { | ||
| println("ctrl+c received, terminating process") | ||
| sigterm.Set() | ||
| }) | ||
|
|
||
| var wg sync.WaitGroup | ||
| parallel := c.Int("max-procs") | ||
| wg.Add(parallel) | ||
|
|
||
| for i := 0; i < parallel; i++ { | ||
| go func() { | ||
| defer wg.Done() | ||
| for { | ||
| if sigterm.IsSet() { | ||
| return | ||
| } | ||
| if err := run(ctx, client, filter); err != nil { | ||
| log.Printf("build runner encountered error: exiting: %s", err) | ||
| return | ||
| } | ||
| } | ||
| }() | ||
| } | ||
|
|
||
| wg.Wait() | ||
| return nil | ||
| } | ||
|
|
||
| const ( | ||
| maxFileUpload = 5000000 | ||
| maxLogsUpload = 5000000 | ||
| ) | ||
|
|
||
| func run(ctx context.Context, client rpc.Peer, filter rpc.Filter) error { | ||
| log.Println("pipeline: request next execution") | ||
|
|
||
| // get the next job from the queue | ||
| work, err := client.Next(ctx, filter) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if work == nil { | ||
| return nil | ||
| } | ||
| log.Printf("pipeline: received next execution: %s", work.ID) | ||
|
|
||
| // new docker engine | ||
| engine, err := docker.NewEnv() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| timeout := time.Hour | ||
| if minutes := work.Timeout; minutes != 0 { | ||
| timeout = time.Duration(minutes) * time.Minute | ||
| } | ||
|
|
||
| ctx, cancel := context.WithTimeout(context.Background(), timeout) | ||
| defer cancel() | ||
|
|
||
| cancelled := abool.New() | ||
| go func() { | ||
| if werr := client.Wait(ctx, work.ID); werr != nil { | ||
| cancelled.SetTo(true) | ||
| log.Printf("pipeline: cancel signal received: %s: %s", work.ID, werr) | ||
| cancel() | ||
| } else { | ||
| log.Printf("pipeline: cancel channel closed: %s", work.ID) | ||
| } | ||
| }() | ||
|
|
||
| go func() { | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| log.Printf("pipeline: cancel ping loop: %s", work.ID) | ||
| return | ||
| case <-time.After(time.Minute): | ||
| log.Printf("pipeline: ping queue: %s", work.ID) | ||
| client.Extend(ctx, work.ID) | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| state := rpc.State{} | ||
| state.Started = time.Now().Unix() | ||
| err = client.Update(context.Background(), work.ID, state) | ||
| if err != nil { | ||
| log.Printf("pipeline: error updating pipeline status: %s: %s", work.ID, err) | ||
| } | ||
|
|
||
| var uploads sync.WaitGroup | ||
| defaultLogger := pipeline.LogFunc(func(proc *backend.Step, rc multipart.Reader) error { | ||
| part, rerr := rc.NextPart() | ||
| if rerr != nil { | ||
| return rerr | ||
| } | ||
| uploads.Add(1) | ||
| writer := rpc.NewLineWriter(client, work.ID, proc.Alias) | ||
| rlimit := io.LimitReader(part, maxLogsUpload) | ||
| io.Copy(writer, rlimit) | ||
|
|
||
| defer func() { | ||
| log.Printf("pipeline: finish uploading logs: %s: step %s", work.ID, proc.Alias) | ||
| uploads.Done() | ||
| }() | ||
|
|
||
| part, rerr = rc.NextPart() | ||
| if rerr != nil { | ||
| return nil | ||
| } | ||
| rlimit = io.LimitReader(part, maxFileUpload) | ||
| mime := part.Header().Get("Content-Type") | ||
| if serr := client.Upload(context.Background(), work.ID, mime, rlimit); serr != nil { | ||
| log.Printf("pipeline: cannot upload artifact: %s: %s: %s", work.ID, mime, serr) | ||
| } | ||
| return nil | ||
| }) | ||
|
|
||
| err = pipeline.New(work.Config, | ||
| pipeline.WithContext(ctx), | ||
| pipeline.WithLogger(defaultLogger), | ||
| pipeline.WithTracer(pipeline.DefaultTracer), | ||
| pipeline.WithEngine(engine), | ||
| ).Run() | ||
|
|
||
| state.Finished = time.Now().Unix() | ||
| state.Exited = true | ||
| if err != nil { | ||
| state.Error = err.Error() | ||
| if xerr, ok := err.(*pipeline.ExitError); ok { | ||
| state.ExitCode = xerr.Code | ||
| } | ||
| if xerr, ok := err.(*pipeline.OomError); ok { | ||
| state.ExitCode = xerr.Code | ||
| } | ||
| if cancelled.IsSet() { | ||
| state.ExitCode = 137 | ||
| } else if state.ExitCode == 0 { | ||
| state.ExitCode = 1 | ||
| } | ||
| } | ||
|
|
||
| log.Printf("pipeline: execution complete: %s", work.ID) | ||
|
|
||
| uploads.Wait() | ||
| err = client.Update(context.Background(), work.ID, state) | ||
| if err != nil { | ||
| log.Printf("Pipeine: error updating pipeline status: %s: %s", work.ID, err) | ||
| } | ||
|
|
||
| return nil | ||
| } |
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