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Added precheck for scheduler (flyteorg#254)
* Added new command in scheduler for pre-check Signed-off-by: Yuvraj <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| package entrypoints | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "github.com/flyteorg/flytestdlib/logger" | ||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/codes" | ||
| "google.golang.org/grpc/metadata" | ||
| "google.golang.org/grpc/status" | ||
|
|
||
| "github.com/avast/retry-go" | ||
| adminClient "github.com/flyteorg/flyteidl/clients/go/admin" | ||
| "github.com/pkg/errors" | ||
| healthpb "google.golang.org/grpc/health/grpc_health_v1" | ||
|
|
||
| "github.com/spf13/cobra" | ||
| ) | ||
|
|
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| const ( | ||
| timeout = 30 * time.Second | ||
| timeoutError = "timeout: failed to connect service %q within %v" | ||
| connectionError = "error: failed to connect service at %q: %+v" | ||
| deadlineError = "timeout: health rpc did not complete within %v" | ||
| healthCheckError = "Health check failed with status %v" | ||
| healthCheckSuccess = "Health check passed, Flyteadmin is up and running" | ||
| ) | ||
|
|
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| var preCheckRunCmd = &cobra.Command{ | ||
| Use: "precheck", | ||
| Short: "This command will check pre requirement for scheduler", | ||
| RunE: func(cmd *cobra.Command, args []string) error { | ||
| opts := []grpc.DialOption{ | ||
| grpc.WithUserAgent("grpc_health_probe"), | ||
| grpc.WithBlock(), | ||
| grpc.WithInsecure(), | ||
| } | ||
| ctx := context.Background() | ||
| config := adminClient.GetConfig(ctx) | ||
|
|
||
| err := retry.Do( | ||
| func() error { | ||
| dialCtx, dialCancel := context.WithTimeout(ctx, timeout) | ||
| defer dialCancel() | ||
| conn, err := grpc.DialContext(dialCtx, config.Endpoint.String(), opts...) | ||
| if err != nil { | ||
| if err == context.DeadlineExceeded { | ||
| logger.Errorf(ctx, timeoutError, config.Endpoint.String(), timeout) | ||
| return errors.New(fmt.Sprintf(timeoutError, config.Endpoint.String(), timeout)) | ||
| } | ||
| logger.Errorf(ctx, connectionError, config.Endpoint.String(), err) | ||
| return errors.New(fmt.Sprintf(connectionError, config.Endpoint.String(), err)) | ||
| } | ||
| rpcCtx := metadata.NewOutgoingContext(ctx, metadata.MD{}) | ||
| resp, err := healthpb.NewHealthClient(conn).Check(rpcCtx, | ||
| &healthpb.HealthCheckRequest{ | ||
| Service: "", | ||
| }) | ||
| if err != nil { | ||
| if stat, ok := status.FromError(err); ok && stat.Code() == codes.Unimplemented { | ||
| return retry.Unrecoverable(err) | ||
| } else if stat, ok := status.FromError(err); ok && stat.Code() == codes.DeadlineExceeded { | ||
| logger.Errorf(ctx, deadlineError, timeout) | ||
| return errors.New(fmt.Sprintf(deadlineError, timeout)) | ||
| } | ||
| return err | ||
| } | ||
| if resp.GetStatus() != healthpb.HealthCheckResponse_SERVING { | ||
| logger.Errorf(ctx, healthCheckError, resp.GetStatus()) | ||
| return errors.New(fmt.Sprintf(healthCheckError, resp.GetStatus())) | ||
| } | ||
| return nil | ||
| }, | ||
| retry.Delay(retry.BackOffDelay(10, nil, &retry.Config{})), | ||
| ) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| logger.Printf(ctx, healthCheckSuccess) | ||
| return nil | ||
| }, | ||
| } | ||
|
|
||
| func init() { | ||
| RootCmd.AddCommand(preCheckRunCmd) | ||
| } |
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