milo/service-ui/service-ui.yaml

# Copyright 2024 The LUCI Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Experimental setup for push-on-green. See b/367097786.

service: ui
runtime: go122

instance_class: F4_1G

automatic_scaling:
  min_idle_instances: 2

# Purposefully not kept in sync with frontend/app.yaml and
# service-api/service-api.yaml. So it's clear that the UI service is only
# capable of serving static assets for the UI.

handlers:
# Host root_sw.js at root so it can have root scope.
- url: /(root_sw\.js(\.map)?)$
  secure: always
  static_files: ui/dist/\1
  upload: ui/dist/(root_sw\.js(\.map)?)$

# Immutable SPA static resources.
- url: /ui/immutable
  secure: always
  static_dir: ui/dist/ui/immutable
  # All files have content hash in their filenames.
  # So they can be cached longer.
  expiration: 7d

# Some other SPA static resources.
- url: /(ui/(ui_sw\.js(\.map)?|manifest\.webmanifest))$
  secure: always
  static_files: ui/dist/\1
  upload: ui/dist/(ui/(ui_sw\.js(\.map)?|manifest\.webmanifest))$
  # These resources are cached by the service worker. Don't serve the old
  # content when the service worker tries to fetch a new version.
  expiration: 0s

# SPA frontend routes.
#
# Note that we do not handle `/ui` here. The UI service worker works on `/ui/.*`
# routes but not on the `/ui` route. Therefore the `/ui` route cannot enjoy the
# performance benefit delivered by the UI service worker. `/ui` requests should
# be redirected to `/ui/` by the root service worker or the golang server.
- url: /ui/.*
  secure: always
  static_files: ui/dist/ui/index.html
  upload: ui/dist/ui/index.html
  # These resources are cached by the service worker. Don't serve the old
  # content when the service worker tries to fetch a new version.
  expiration: 0s

# The rest is handled by Go code (a bare LUCI go server).
# We don't expect users to hit this route.
- url: /.*
  script: auto
  secure: always

inbound_services:
- warmup

entrypoint: main