diff --git a/executor/containerdexecutor/executor.go b/executor/containerdexecutor/executor.go
index 7b45df78..43a05ccc 100644
--- a/executor/containerdexecutor/executor.go
+++ b/executor/containerdexecutor/executor.go
@@ -11,6 +11,8 @@ import (
 	"time"
 
 	"github.com/moby/buildkit/util/bklog"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
 
 	"github.com/containerd/containerd"
 	"github.com/containerd/containerd/cio"
@@ -207,8 +209,10 @@ func (w *containerdExecutor) Run(ctx context.Context, id string, root executor.M
 		}
 	}()
 
+	trace.SpanFromContext(ctx).AddEvent("Container created")
 	err = w.runProcess(ctx, task, process.Resize, process.Signal, func() {
 		startedOnce.Do(func() {
+			trace.SpanFromContext(ctx).AddEvent("Container started")
 			if started != nil {
 				close(started)
 			}
@@ -396,6 +400,12 @@ func (w *containerdExecutor) runProcess(ctx context.Context, p containerd.Proces
 			if cancel != nil {
 				cancel()
 			}
+			trace.SpanFromContext(ctx).AddEvent(
+				"Container exited",
+				trace.WithAttributes(
+					attribute.Int("exit.code", int(status.ExitCode())),
+				),
+			)
 			if status.ExitCode() != 0 {
 				exitErr := &gatewayapi.ExitError{
 					ExitCode: status.ExitCode(),
diff --git a/executor/runcexecutor/executor.go b/executor/runcexecutor/executor.go
index e7f4b82d..702d5131 100644
--- a/executor/runcexecutor/executor.go
+++ b/executor/runcexecutor/executor.go
@@ -12,6 +12,8 @@ import (
 	"time"
 
 	"github.com/moby/buildkit/util/bklog"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
 
 	"github.com/containerd/containerd/mount"
 	containerdoci "github.com/containerd/containerd/oci"
@@ -316,8 +318,10 @@ func (w *runcExecutor) Run(ctx context.Context, id string, root executor.Mount,
 
 	bklog.G(ctx).Debugf("> creating %s %v", id, meta.Args)
 
+	trace.SpanFromContext(ctx).AddEvent("Container created")
 	err = w.run(runCtx, id, bundle, process, func() {
 		startedOnce.Do(func() {
+			trace.SpanFromContext(ctx).AddEvent("Container started")
 			if started != nil {
 				close(started)
 			}
@@ -339,6 +343,12 @@ func exitError(ctx context.Context, err error) error {
 				ExitCode: uint32(runcExitError.Status),
 			}
 		}
+		trace.SpanFromContext(ctx).AddEvent(
+			"Container exited",
+			trace.WithAttributes(
+				attribute.Int("exit.code", int(exitErr.ExitCode)),
+			),
+		)
 		select {
 		case <-ctx.Done():
 			exitErr.Err = errors.Wrapf(ctx.Err(), exitErr.Error())
@@ -348,6 +358,10 @@ func exitError(ctx context.Context, err error) error {
 		}
 	}
 
+	trace.SpanFromContext(ctx).AddEvent(
+		"Container exited",
+		trace.WithAttributes(attribute.Int("exit.code", 0)),
+	)
 	return nil
 }
 
diff --git a/solver/llbsolver/ops/exec.go b/solver/llbsolver/ops/exec.go
index d01a72c0..51df9ff3 100644
--- a/solver/llbsolver/ops/exec.go
+++ b/solver/llbsolver/ops/exec.go
@@ -27,6 +27,7 @@ import (
 	digest "github.com/opencontainers/go-digest"
 	ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/pkg/errors"
+	"go.opentelemetry.io/otel/trace"
 	"golang.org/x/sync/semaphore"
 )
 
@@ -234,6 +235,8 @@ func addDefaultEnvvar(env []string, k, v string) []string {
 }
 
 func (e *execOp) Exec(ctx context.Context, g session.Group, inputs []solver.Result) (results []solver.Result, err error) {
+	trace.SpanFromContext(ctx).AddEvent("ExecOp started")
+
 	refs := make([]*worker.WorkerRef, len(inputs))
 	for i, inp := range inputs {
 		var ok bool