Mutlicell rolling replace

.github/workflows/build-worker-ami.yml

@@ -46,6 +46,10 @@ env:
   AZURE_LOCATION: ${{ vars.AZURE_LOCATION || 'eastus2' }}
   AZURE_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
   AZURE_GALLERY_NAME: ${{ vars.AZURE_GALLERY_NAME || 'opensandbox_gallery' }}
+  # JSON array of extra regions to replicate the gallery image to, beyond the
+  # build region — must list every cell region running workers. e.g.
+  # '["westus2","westus3"]'. Empty = build region only (single-cell).
+  AZURE_REPLICATION_REGIONS: ${{ vars.AZURE_REPLICATION_REGIONS || '[]' }}
 
 jobs:
   build-image:
@@ -146,6 +150,7 @@ jobs:
             -var "subscription_id=$AZURE_SUBSCRIPTION_ID" \
             -var "resource_group=$AZURE_RESOURCE_GROUP" \
             -var "location=$AZURE_LOCATION" \
+            -var "replication_regions=$AZURE_REPLICATION_REGIONS" \
             -var "gallery_name=$AZURE_GALLERY_NAME" \
             -var "image_version_patch=$PATCH" \
             -var "base_archive_account=${{ secrets.AZURE_STORAGE_ACCOUNT }}" \
@@ -181,32 +186,47 @@ jobs:
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}
           subscription-id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
 
-      - name: Store image ID in Key Vault
+      - name: Publish image coordinates to Infisical (/shared → all cell KVs)
+        env:
+          # Universal-auth machine identity with write access to /shared.
+          INFISICAL_PROJECT_ID: ${{ vars.INFISICAL_PROJECT_ID }}
+          INFISICAL_ENV: ${{ vars.INFISICAL_ENV || 'prod' }}
+          INFISICAL_UA_CLIENT_ID: ${{ secrets.INFISICAL_UA_CLIENT_ID }}
+          INFISICAL_UA_CLIENT_SECRET: ${{ secrets.INFISICAL_UA_CLIENT_SECRET }}
         run: |
-          az keyvault secret set \
-            --vault-name "${{ secrets.AZURE_KEY_VAULT_NAME }}" \
-            --name "worker-image-id" \
-            --value "$IMAGE_ID"
-
-          az keyvault secret set \
-            --vault-name "${{ secrets.AZURE_KEY_VAULT_NAME }}" \
-            --name "worker-image-version" \
-            --value "$VERSION"
+          # The image coordinates are a single global fact (one gallery image
+          # version, identical for every cell), so they live in Infisical
+          # /shared. Writing directly to one Azure KV no longer works: Infisical
+          # is push-authoritative and its sync would overwrite the direct write
+          # with the stale /shared value. Publishing here lets Infisical fan the
+          # new image-id out to EVERY cell's KV, so every cell's scaler rolls.
+          curl -1sLf 'https://dl.cloudsmith.io/public/infisical/infisical-cli/setup.deb.sh' | sudo -E bash
+          sudo apt-get install -y infisical
+
+          export INFISICAL_TOKEN=$(infisical login --method=universal-auth \
+            --client-id="$INFISICAL_UA_CLIENT_ID" \
+            --client-secret="$INFISICAL_UA_CLIENT_SECRET" \
+            --silent --plain)
+
+          set_shared() {
+            infisical secrets set --projectId="$INFISICAL_PROJECT_ID" --env="$INFISICAL_ENV" \
+              --path=/shared --silent "$1=$2" >/dev/null
+            echo "  /shared $1 = $2"
+          }
+
+          set_shared worker-image-id "$IMAGE_ID"
+          set_shared worker-image-version "$VERSION"
 
           # Record this build's goldenVersion so the NEXT AMI build can
           # retain it as "previous golden" in /opt/opensandbox/images/bases/.
           NEW_GOLDEN=$(grep -a 'Base image golden version:' /tmp/packer-output.txt | tail -1 | awk '{print $NF}' | tr -d '\r')
           if [ -n "$NEW_GOLDEN" ]; then
-            az keyvault secret set \
-              --vault-name "${{ secrets.AZURE_KEY_VAULT_NAME }}" \
-              --name "golden-version" \
-              --value "$NEW_GOLDEN"
-            echo "Recorded new golden-version: $NEW_GOLDEN"
+            set_shared golden-version "$NEW_GOLDEN"
           else
             echo "WARN: could not extract goldenVersion from packer output — next build won't retain this base"
           fi
 
-          echo "Published image ID to Key Vault"
+          echo "Published image coordinates to Infisical /shared — sync fans out to every cell KV"
 
       - name: Cleanup old images
         run: |

deploy/packer/worker-ami.pkr.hcl

@@ -55,6 +55,12 @@ variable "location" {
   default = "westus2"
 }
 
+variable "replication_regions" {
+  type        = list(string)
+  description = "Extra Azure regions to replicate the gallery image version to, beyond the build region. Must include EVERY cell region that runs workers — a cell whose region has no replica cannot boot the image. The build region (var.location) is always included automatically."
+  default     = []
+}
+
 variable "vm_size" {
   type        = string
   default     = "Standard_D4ads_v7"
@@ -184,7 +190,9 @@ source "azure-arm" "worker" {
     gallery_name   = var.gallery_name
     image_name     = "osb-worker-v7"
     image_version  = "1.0.${var.image_version_patch}"
-    replication_regions = [var.location]
+    # Always include the build region; add every other cell region so each
+    # cell can boot this version from a local replica (cross-region boots fail).
+    replication_regions = distinct(concat([var.location], var.replication_regions))
   }
 
   azure_tags = {