如何在不启动功能模拟器的情况下指定功能模拟器的主机：端口答案

【问题标题】：How to specify the host:port of the functions emulator without starting the functions emulator如何在不启动功能模拟器的情况下指定功能模拟器的主机：端口
【发布时间】：2021-02-18 17:41:22
【问题描述】：

我正在用 Go 编写云函数并从 firestore 模拟器触发它们。如果我手动启动 Firestore 模拟器，这将有效：

 java -jar ~/.cache/firebase/emulators/cloud-firestore-emulator-v1.11.9.jar \
  --functions_emulator localhost:5001

然后我在 localhost:5001 上启动我自己的服务器来处理触发的功能，一切似乎都正常。

但是，我想以正常方式启动 Firestore 模拟器以便我获得漂亮的 Web UI 等。我的 firebase.json 文件如下：

{
  "emulators": {
    "firestore": {
      "port": 8080
    },
    "functions": {
      "port": 5001
    },
    "pubsub": {
      "port": 8085
    },
    "ui": {
      "enabled": true
    },
    "hosting": {
      "port": 5000
    },
    "auth": {
      "port": 9099
    }
  },
  "ui": {
    "enabled": true,
    "host": "localhost",
    "port": 4000
  },
  "functions": {
    "port": "5001",
    "predeploy": [
      "npm --prefix \"$RESOURCE_DIR\" run lint",
      "npm --prefix \"$RESOURCE_DIR\" run build"
    ],
    "source": "functions"
  },
  "pubsub": {
    "port": "8085"
  },
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "hosting": {
    "public": "build",
    "ignore": [
      "firebase.json",
      "**/.*",
      "**/node_modules/**"
    ],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ]
  }
}

我使用启动模拟器

firebase emulators:start --only firestore

然后我使用以下命令在 firestore 上设置触发器：

#!/bin/zsh

TRIGGER='http://localhost:8080/emulator/v1/projects/fugalist/triggers/Requests'

curl --location --request PUT ${TRIGGER} \
    --header 'Content-Type: application/json' \
    --data-raw '{
        "eventTrigger": {
          "resource": "projects/fugalist/databases/(default)/documents/Requests/{doc}",
          "eventType": "providers/cloud.firestore/eventTypes/document.create",
          "service": "firestore.googleapis.com"
      }
    }'

最后，我在 /Requests 下手动创建了一个文档。 firestore-debug.log 现在包含：

[debug] [2020-11-10T21:09:20.187Z] ----------------------------------------------------------------------
[debug] [2020-11-10T21:09:20.189Z] Command:       /usr/local/Cellar/node/12.4.0/bin/node /Users/michaelcoffin/node_modules_global/bin/firebase emulators:start --only firestore
[debug] [2020-11-10T21:09:20.189Z] CLI Version:   8.15.0
[debug] [2020-11-10T21:09:20.189Z] Platform:      darwin
[debug] [2020-11-10T21:09:20.189Z] Node Version:  v12.4.0
[debug] [2020-11-10T21:09:20.190Z] Time:          Tue Nov 10 2020 13:09:20 GMT-0800 (Pacific Standard Time)
[debug] [2020-11-10T21:09:20.190Z] ----------------------------------------------------------------------
[debug] [2020-11-10T21:09:20.190Z] 
[debug] [2020-11-10T21:09:20.197Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[debug] [2020-11-10T21:09:20.197Z] > authorizing via signed-in user
[info] i  emulators: Starting emulators: firestore {"metadata":{"emulator":{"name":"hub"},"message":"Starting emulators: firestore"}}
[debug] [2020-11-10T21:09:20.210Z] [hub] writing locator at /var/folders/xy/m2rx3tw14mnfvryxx2jvhyjh0000gn/T/hub-fugalist.json
[debug] [2020-11-10T21:09:20.229Z] Ignoring unsupported arg: projectId {"metadata":{"emulator":{"name":"firestore"},"message":"Ignoring unsupported arg: projectId"}}
[debug] [2020-11-10T21:09:20.229Z] Ignoring unsupported arg: auto_download {"metadata":{"emulator":{"name":"firestore"},"message":"Ignoring unsupported arg: auto_download"}}
[debug] [2020-11-10T21:09:20.229Z] Starting Firestore Emulator with command {"binary":"java","args":["-Duser.language=en","-jar","/Users/michaelcoffin/.cache/firebase/emulators/cloud-firestore-emulator-v1.11.9.jar","--host","localhost","--port",8080,"--rules","/Users/michaelcoffin/expmap/fe/firestore.rules"],"optionalArgs":["port","webchannel_port","host","rules","functions_emulator","seed_from_export"],"joinArgs":false} {"metadata":{"emulator":{"name":"firestore"},"message":"Starting Firestore Emulator with command {\"binary\":\"java\",\"args\":[\"-Duser.language=en\",\"-jar\",\"/Users/michaelcoffin/.cache/firebase/emulators/cloud-firestore-emulator-v1.11.9.jar\",\"--host\",\"localhost\",\"--port\",8080,\"--rules\",\"/Users/michaelcoffin/expmap/fe/firestore.rules\"],\"optionalArgs\":[\"port\",\"webchannel_port\",\"host\",\"rules\",\"functions_emulator\",\"seed_from_export\"],\"joinArgs\":false}"}}
[info] i  firestore: Firestore Emulator logging to firestore-debug.log {"metadata":{"emulator":{"name":"firestore"},"message":"Firestore Emulator logging to \u001b[1mfirestore-debug.log\u001b[22m"}}
[debug] [2020-11-10T21:09:21.040Z] API endpoint: http:// {"metadata":{"emulator":{"name":"firestore"},"message":"API endpoint: http://"}}
[debug] [2020-11-10T21:09:21.040Z] localhost:8080
If you are using a library that supports the FIRESTORE_EMULATOR_HOST environment variable, run:

   export FIRESTORE_EMULATOR_HOST=localhost:8080

Dev App Server is now running.

 {"metadata":{"emulator":{"name":"firestore"},"message":"localhost:8080\nIf you are using a library that supports the FIRESTORE_EMULATOR_HOST environment variable, run:\n\n   export FIRESTORE_EMULATOR_HOST=localhost:8080\n\nDev App Server is now running.\n\n"}}
[warn] ⚠  ui: Emulator UI unable to start on port 4000, starting on 4003 instead. {"metadata":{"emulator":{"name":"ui"},"message":"Emulator UI unable to start on port 4000, starting on 4003 instead."}}
[debug] [2020-11-10T21:09:21.275Z] Ignoring unsupported arg: auto_download {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: auto_download"}}
[debug] [2020-11-10T21:09:21.275Z] Ignoring unsupported arg: port {"metadata":{"emulator":{"name":"ui"},"message":"Ignoring unsupported arg: port"}}
[debug] [2020-11-10T21:09:21.275Z] Starting Emulator UI with command {"binary":"node","args":["/Users/michaelcoffin/.cache/firebase/emulators/ui-v1.2.2/server.bundle.js"],"optionalArgs":[],"joinArgs":false} {"metadata":{"emulator":{"name":"ui"},"message":"Starting Emulator UI with command {\"binary\":\"node\",\"args\":[\"/Users/michaelcoffin/.cache/firebase/emulators/ui-v1.2.2/server.bundle.js\"],\"optionalArgs\":[],\"joinArgs\":false}"}}
[info] i  ui: Emulator UI logging to ui-debug.log {"metadata":{"emulator":{"name":"ui"},"message":"Emulator UI logging to \u001b[1mui-debug.log\u001b[22m"}}
[debug] [2020-11-10T21:09:21.369Z] Web / API server started at http://localhost:4003
 {"metadata":{"emulator":{"name":"ui"},"message":"Web / API server started at http://localhost:4003\n"}}
[info] 
┌───────────────────────────────────────────────────────────────────────┐
│ ✔  All emulators ready! View status and logs at http://localhost:4003 │
└───────────────────────────────────────────────────────────────────────┘

┌───────────┬────────────────┬─────────────────────────────────┐
│ Emulator  │ Host:Port      │ View in Emulator UI             │
├───────────┼────────────────┼─────────────────────────────────┤
│ Firestore │ localhost:8080 │ http://localhost:4003/firestore │
└───────────┴────────────────┴─────────────────────────────────┘
  Other reserved ports: 4400, 4500

Issues? Report them at https://github.com/firebase/firebase-tools/issues and attach the *-debug.log files.
 
[debug] [2020-11-10T21:09:24.814Z] Nov 10, 2020 1:09:24 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
Nov 10, 2020 1:09:24 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:09:24 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\nNov 10, 2020 1:09:24 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:09:24.814Z] Nov 10, 2020 1:09:24 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:09:24 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:09:24.944Z] Nov 10, 2020 1:09:24 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:09:24 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:09:25.386Z] Nov 10, 2020 1:09:25 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:09:25 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:09:32.373Z] Nov 10, 2020 1:09:32 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:09:32 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:09:40.867Z] Nov 10, 2020 1:09:40 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:09:40 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:09:41.511Z] Nov 10, 2020 1:09:41 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:09:41 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:09:41.521Z] Nov 10, 2020 1:09:41 PM com.google.cloud.datastore.emulator.impl.context.EmulatorAuthorization warnAboutSecuredJwt
WARNING: expected an unsecured JWT, the emulator does not validate JWTs and IS NOT SECURE
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:09:41 PM com.google.cloud.datastore.emulator.impl.context.EmulatorAuthorization warnAboutSecuredJwt\nWARNING: expected an unsecured JWT, the emulator does not validate JWTs and IS NOT SECURE\n"}}
[debug] [2020-11-10T21:09:41.629Z] Nov 10, 2020 1:09:41 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:09:41 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:10:21.137Z] Nov 10, 2020 1:10:21 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:10:21 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:10:21.165Z] Nov 10, 2020 1:10:21 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:10:21 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:10:21.179Z] Nov 10, 2020 1:10:21 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:10:21 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:10:21.225Z] Nov 10, 2020 1:10:21 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:10:21 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead\nINFO: Detected non-HTTP/2 connection.\n"}}
[debug] [2020-11-10T21:10:21.239Z] Nov 10, 2020 1:10:21 PM com.google.cloud.datastore.emulator.impl.events.EventLogger publishEvent
WARNING: Failed to publish event for trigger projects/fugalist/triggers/Requests because Functions Emulator host/port is not configured.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:10:21 PM com.google.cloud.datastore.emulator.impl.events.EventLogger publishEvent\nWARNING: Failed to publish event for trigger projects/fugalist/triggers/Requests because Functions Emulator host/port is not configured.\n"}}

在我手动创建文档后立即出现的相关部分是最后一个条目：

WARNING: Failed to publish event for trigger projects/fugalist/triggers/Requests because Functions Emulator host/port is not configured.
 {"metadata":{"emulator":{"name":"firestore"},"message":"Nov 10, 2020 1:10:21 PM com.google.cloud.datastore.emulator.impl.events.EventLogger publishEvent\nWARNING: Failed to publish event for trigger projects/fugalist/triggers/Requests because Functions Emulator host/port is not configured.\n"}}

确实，ps 表明 --functions_emulator 标志未用于调用 firestore 模拟器：

michaelcoffin    98802   0.0  1.6 16006468 536636   ??  Ss    1:09PM   0:06.19 /usr/bin/java -Duser.language=en -jar /Users/michaelcoffin/.cache/firebase/emulators/cloud-firestore-emulator-v1.11.9.jar --host localhost --port 8080 --rules /Users/michaelcoffin/expmap/fe/firestore.rules

而且，事实上，如果您要求模拟器功能，它是使用的：

firebase emulators:start --only firestore,functions

ps output:
99072   0.0  1.2 15892768 391240   ??  Ss    1:41PM   0:04.17 /usr/bin/java -Duser.language=en -jar /Users/michaelcoffin/.cache/firebase/emulators/cloud-firestore-emulator-v1.11.9.jar --host localhost --port 8080 --rules /Users/michaelcoffin/expmap/fe/firestore.rules --functions_emulator localhost:5001

我知道这并不完全是一个错误，因为模拟器套件不正式支持用 Go 编写的 Google Cloud Functions。但是，如果我使用 --functions_emulator 标志手动启动 firestore 模拟器，模拟器套件确实实际上可以正常使用 Go。因此，我试图找到一种解决方法，以便即使未启动函数模拟器也可以使用 --functions_emulator 标志。

【问题讨论】：

标签： firebase google-cloud-firestore

【解决方案1】：

Firebase CLI 不提供通过firebase emulators:start 命令设置主机和端口的标志。尽管如此，您可以在firebase.json 文件中控制所有模拟器的端口设置。在其中您应该看到下面的配置，您可以在其中替换端口值：

"emulators": {
    "firestore": {
      "port": 8500
    },
    "ui": {
      "enabled": true,
      "port": 4040
    }
}

关于主机，默认情况下它被设置为 localhost 所以它应该不是问题。

【讨论】：

我已经在 firebase.json 中设置了端口，但是 emulators:start 似乎没有将它传递给 firestore 模拟器，我猜是因为我没有要求它启动函数模拟器.在 firestore-debug.log 中，我看到“警告：无法发布触发项目/fugalist/triggers/Requests 的事件，因为未配置函数模拟器主机/端口。”
@MichaelCoffin 您能否编辑问题以反映所经历的行为？我想知道您运行了哪些命令、配置文件和模拟器输出以进一步调查（删除可识别信息，例如项目 ID 等，如果有的话）。另外，你在 Linux/Unix 上运行吗？
好的，我已经详细描述过了。但是，我现在很确定目前不支持此功能，因此我提交了功能请求。我在 MacOS 上运行。