Trigger for Cloud Logging that sends messages to WebSocket connections

A trigger for Cloud Logging sends messages to WebSocket connections when you add entries to a log group.

A trigger for Cloud Logging requires a service account for reading from a log group and sending messages to WebSocket connections.

For more information about creating a trigger for Cloud Logging, see Creating a trigger for Cloud Logging that sends messages to WebSocket connections.

Message batchingMessage batching

The batching settings allow sending several messages to WebSocket connections at a time. They set a top limit on a message batch size and its accumulation time. For example, if the message batch size is 3, WebSocket connections can receive batches containing from 1 to 3 messages.

Roles required for the proper operation of a trigger for Cloud LoggingRoles required for the proper operation of a trigger for Cloud Logging

• To create a trigger, you need a permission for the service account under which the trigger runs the operation. This permission comes with the iam.serviceAccounts.user and editor roles or higher.
• For the trigger to fire, the service account needs the following roles:
  • api-gateway.websocketBroadcaster for the folder containing the API gateway.
  • logging.reader for the log group that will fire the trigger when entries are added to it.

Format of the message from the trigger for Cloud LoggingFormat of the message from the trigger for Cloud Logging

After the trigger fires, it will send the following message to WebSocket connections:

{
   "messages":[
      {
         "event_metadata":{
            "event_id":"2c59a567-6666-4b65-a0b0-cc12********",
            "event_type":"yandex.cloud.events.serverless.triggers.LoggingMessageBatch",
            "created_at":{
               "seconds":1630607359,
               "nanos":6794776
            }
         },
         "details":{
            "messages":[
               {
                  "resource":{
                     "type":"serverless.function",
                     "id":"b09tm9raoev5********"
                  },
                  "timestamp":"2021-09-02 18:29:17.118082213 +0000 UTC",
                  "level":"INFO",
                  "message":"START RequestID: 085035c7-2319-40dd-bb03-fd8t******** Version: b09s5cq4b935********",
                  "json_payload":{
                     "request_id":"085035c7-2319-40dd-bb03-fdb2********",
                     "version_id":"b09s5cq4b935********"
                  }
               }
            ]
         }
      }
   ]
}

Useful linksUseful links

• Trigger for Cloud Logging that runs a Serverless Containers container
• Trigger for Cloud Logging that runs a Cloud Functions function