Remove use of busybox to remove unnecessary deps

Signed-off-by: Dom Del Nano <ddelnano@gmail.com>

Author: ddelnano

k8s/cloud/overlays/plugin_job/plugin_job.yaml

@@ -16,11 +16,7 @@ spec:
       containers:
       - name: updater
         image: cloud-plugin-load_db:latest
-        command: ["/bin/busybox", "sh", "-c"]
-        args:
-        - |
-            trap "touch /tmp/pod/terminated" EXIT
-            src/cloud/plugin/load_db/load_db_/load_db
+        command: ["src/cloud/plugin/load_db/load_db_/load_db"]
         envFrom:
         - configMapRef:
             name: pl-db-config

src/cloud/plugin/load_db/BUILD.bazel

@@ -54,8 +54,7 @@ pl_go_binary(
 
 container_image(
     name = "db_base_image",
-    # We need a debug image because the plugin_updater calls busybox to set a TRAP.
-    base = "//:pl_cc_base_debug_image",
+    base = "//:pl_cc_base_image",
 )
 
 pl_go_image(

src/cloud/plugin/load_db/main.go

@@ -26,6 +26,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"os"
 	"path/filepath"
 
 	"github.com/blang/semver"
@@ -320,6 +321,13 @@ func UpdatePlugins(db *sqlx.DB, pClient pluginpb.DataRetentionPluginServiceClien
 }
 
 func main() {
+	defer func() {
+		// Signal sidecar containers that this job has finished.
+		if err := os.WriteFile("/tmp/pod/terminated", nil, 0644); err != nil {
+			log.WithError(err).Warn("Failed to write termination file")
+		}
+	}()
+
 	log.Info("Starting load_plugins...")
 	pflag.Parse()