dump docker image list

cluster/log-dump/log-dump.sh

@@ -218,6 +218,25 @@ function export-windows-docker-event-log() {
     done
 }
 
+# Saves prepulled Windows Docker images list to ${WINDOWS_LOGS_DIR}\docker_images.log
+# on node $1.
+function export-windows-docker-images-list() {
+    local -r node="${1}"
+
+    local -r powershell_cmd="powershell.exe -Command \"\$logs=\$(docker image list); \$logs | Out-File -FilePath '${WINDOWS_LOGS_DIR}\\docker_images.log'\""
+
+    # Retry up to 3 times to allow ssh keys to be properly propagated and
+    # stored.
+    for retry in {1..3}; do
+      if gcloud compute ssh --project "${PROJECT}" --zone "${ZONE}" "${node}" \
+        --command "$powershell_cmd"; then
+        break
+      else
+        sleep 10
+      fi
+    done
+}
+
 # Saves log files from diagnostics tool.(https://github.com/GoogleCloudPlatform/compute-image-tools/tree/master/cli_tools/diagnostics)
 function save-windows-logs-via-diagnostics-tool() {
     local node="${1}"
@@ -247,6 +266,7 @@ function save-windows-logs-via-ssh() {
     local dest_dir="${2}"
 
     export-windows-docker-event-log "${node}"
+    export-windows-docker-images-list "${node}"
     
     local remote_files=()
     for file in ${windows_node_logfiles[@]}; do