Google cloud platform 使用Logback'记录到Stackdriver；s控制台JSON追加器

我正在使用计算引擎虚拟机上的日志代理和Logback的控制台JSON附加程序，试图让Stackdriver正确地提取日志

在logback中，我有以下配置：

在Compute VM上，我安装了日志代理，并使用结构化配置：

curl-sSOhttps://dl.google.com/cloudagents/install-logging-agent.sh
sudobash安装-logging-agent.sh--结构化

来自应用程序的日志是JSON，并最终位于

syslog

中，大致如下：

Sep 11 08:21:08 backend-1 env[2440]: {"timestampSeconds":1568190068,"timestampNanos":703000000,"severity":"DEBUG","thread":"main","logger":"com.zaxxer.hikari.HikariConfig","message":"idleTimeout.....................600000","context":"default"}

问题是Stackdriver将其作为文本提取，并最终在Stackdriver日志查看器中处于错误状态：

{
 insertId:  "y5oc1500...f1j4fh"  
 jsonPayload: {
  host:  "backend-1"   
  ident:  "env"   
  message:  "{"timestampSeconds":1568190911,"timestampNanos":802000000,"severity":"DEBUG","thread":"HikariPool-1 connection closer","logger":"com.zaxxer.hikari.pool.PoolBase","message":"HikariPool-1 - Closing connection org.postgresql.jdbc.PgConnection@64c28b76: (connection has passed idleTimeout)","context":"default"}"   
  pid:  "2440"   
 }
 labels: {…}  
 logName:  "projects/g...o/logs/syslog"  
 receiveTimestamp:  "2019-09-11T08:35:17.538019705Z"  
 resource: {…}  
 timestamp:  "2019-09-11T08:35:11Z"  
}

它似乎没有将消息中的JSON作为日志条目，而是将其视为原始文本。我错过了什么