codis-proxy启动后，注册到zk中的proxy节点的proxy_addr的ip为什么是一串字符串

这是我codis-proxy启动后，注册到zk中的proxy节点信息：

[zk: localhost:2181(CONNECTED) 1] get /codis3/codis-demo/proxy/proxy-420a662ef2b07ede2e7254260a1b4389
{
"id": 1,
"token": "420a662ef2b07ede2e7254260a1b4389",
"start_time": "2019-04-03 21:30:16.28276716 +0800 CST m=+0.014142410",
"admin_addr": "127.0.0.1:11080",
"proto_type": "tcp4",
"proxy_addr": "iZwz977ogd6jecq7rowvtsZ:19000",
"jodis_path": "/jodis/codis-demo/proxy-420a662ef2b07ede2e7254260a1b4389",
"product_name": "codis-demo",
"pid": 15142,
"pwd": "/apps/gopath/src/github.com/CodisLabs/codis",
"sys": "Linux iZwz977ogd6jecq7rowvtsZ 3.10.0-957.5.1.el7.x86_64 #1 SMP Fri Feb 1 14:54:57 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux",
"hostname": "iZwz977ogd6jecq7rowvtsZ",
"datacenter": ""
}

为什么注册到zk中的proxy_addr的ip是iZwz977ogd6jecq7rowvtsZ呢，我的proxy.toml里配置的proxy_addr实际上是0.0.0.0:19000，这是我的proxy.toml配置信息：

product_name = "codis-demo"
product_auth = ""

session_auth = ""

admin_addr = "127.0.0.1:11080"

proto_type = "tcp4"
proxy_addr = "0.0.0.0:19000"

jodis_name = "zookeeper"
jodis_addr = "127.0.0.1:2181"
jodis_auth = ""
jodis_timeout = "20s"
jodis_compatible = false

求解