Install DCGM exporter in A3 Mega image

Author: r4victor

.github/workflows/gcp-a3mega-image.yml

@@ -2,6 +2,7 @@ name: Build GCP A3 Mega VM image
 
 on:
   - workflow_dispatch
+  - push
 
 env:
   PACKER_VERSION: "1.9.2"

scripts/packer/gcp-a3mega-image.json

@@ -19,6 +19,10 @@
     {
       "type": "shell",
       "inline": [
+        "sudo rm /etc/apt/sources.list.d/ar_us_apt_pkg_dev_projects_gce_ai_infra.list",
+        "sudo apt-get update",
+        "sudo apt-get install -y --no-install-recommends datacenter-gpu-manager-4-proprietary datacenter-gpu-manager-exporter",
+        "sudo systemctl disable google-cloud-ops-agent.service",
         "gcloud -q auth configure-docker us-docker.pkg.dev",
         "docker pull us-docker.pkg.dev/gce-ai-infra/gpudirect-tcpxo/tcpgpudmarxd-dev:v1.0.14",
         "docker pull us-docker.pkg.dev/gce-ai-infra/gpudirect-tcpxo/nccl-plugin-gpudirecttcpx-dev:v1.0.8-1"