ATS 6.0 The cluster fails to be established

[KfreeSre]

Hello everyone, I have deployed ATS 6.0 on the cloud server, and I want to use the cluster function, but I keep failing, every node cannot join any cluster, what should I do?
OS: Centos 7.4
ATS: 6.0
Cluster configuration in the records.config file:
#-----------------------------------------------------------------
LOCAL proxy.local.cluster.type INT 1

eth0 indicates the Intranet IP address

CONFIG proxy.config.cluster.ethernet_interface STRING eth0
CONFIG proxy.config.cluster.cluster_port INT 8086
CONFIG proxy.config.cluster.rsport INT 8088
CONFIG proxy.config.cluster.mcport INT 8089
CONFIG proxy.config.cluster.mc_group_addr STRING 224.0.1.37
CONFIG proxy.config.body_factory.template_sets_dir STRING etc/trafficserver/body_factory
CONFIG proxy.config.cluster.startup_timeout INT 10
CONFIG proxy.config.log.xml_config_file STRING logs_xml.config
CONFIG proxy.config.proxy_name STRING GENSEE_CACHE_CLOUD
CONFIG proxy.config.cluster.cluster_configuration STRING cluster.config
CONFIG proxy.config.cluster.threads INT 10
CONFIG proxy.config.cache.ip_allow.filename STRING ip_allow.config
CONFIG proxy.config.cache.control.filename STRING cache.config
CONFIG proxy.config.url_remap.filename STRING remap.config
CONFIG proxy.config.ssl.client.certification_level INT 0
CONFIG proxy.config.ssl.server.cert.path STRING /gensee/ats/sslKey
CONFIG proxy.config.ssl.server.private_key.path STRING /gensee/ats/sslKey
#CONFIG proxy.config.ssl.CA.cert.path STRING /gensee/ats/sslKey/geotrust-xx-ca.crt
CONFIG proxy.config.ssl.server.multicert.filename STRING ssl_multicert.config
CONFIG proxy.config.ssl.enabled INT 1
LOCAL proxy.local.incoming_ip_to_bind STRING xxx
CONFIG proxy.config.ssl.SSLv2 INT 0
#-------------------------------------------------------------
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