Fix runners to do their best to gracefully stop on pod eviction (#1759)

Ref #1535
Ref #1581

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

testing/kubectl.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"os"
 	"os/exec"
+	"strings"
 	"time"
 
 	"github.com/actions-runner-controller/actions-runner-controller/testing/runtime"
@@ -112,6 +113,35 @@ func (k *Kubectl) WaitUntilDeployAvailable(ctx context.Context, name string, cfg
 	return nil
 }
 
+func (k *Kubectl) FindPods(ctx context.Context, label string, cfg KubectlConfig) ([]string, error) {
+	args := []string{"po", "-l", label, "-o", `jsonpath={range .items[*]}{.metadata.name}{"\n"}`}
+
+	out, err := k.CombinedOutput(k.kubectlCmd(ctx, "get", args, cfg))
+	if err != nil {
+		return nil, err
+	}
+
+	var pods []string
+	for _, l := range strings.Split(out, "\n") {
+		if l != "" {
+			pods = append(pods, l)
+		}
+	}
+
+	return pods, nil
+}
+
+func (k *Kubectl) DeletePods(ctx context.Context, names []string, cfg KubectlConfig) error {
+	args := []string{"po"}
+	args = append(args, names...)
+
+	if _, err := k.CombinedOutput(k.kubectlCmd(ctx, "delete", args, cfg)); err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func (k *Kubectl) kubectlCmd(ctx context.Context, c string, args []string, cfg KubectlConfig) *exec.Cmd {
 	args = append([]string{c}, args...)