release: add migration script for setting nginx annotations

migration/v0.39/prepare/70-set-nginx-annotations.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+HERE="$(dirname "$(readlink -f "${0}")")"
+ROOT="$(readlink -f "${HERE}/../../../")"
+
+# shellcheck source=scripts/migration/lib.sh
+source "${ROOT}/scripts/migration/lib.sh"
+
+if [[ "${CK8S_CLUSTER}" =~ ^(sc|wc|both)$ ]]; then
+  service_enabled=$(yq_dig common .ingressNginx.controller.service.enabled)
+  if [[ "${service_enabled}" != "true" ]]; then
+    log_info "ingress-nginx service not enabled, skipping"
+    exit 0
+  fi
+
+  annotations=$(yq_dig common .ingressNginx.controller.service.annotations)
+  if [[ ! "${annotations}" =~ ^set\-me ]]; then
+    log_info "ingress-nginx annotations are already set, skipping"
+    exit 0
+  fi
+
+  log_info "setting ingress-nginx annotations to empty object"
+  yq_add common .ingressNginx.controller.service.annotations {}
+fi