UFW防火墙后的Elasticsearch聚类

Answer 1

默认情况下首选IPV6。您可以通过将java.net.PreferIPv4Stack系统属性设置为true来更改此行为。
您还必须看到，默认情况下，ES绑定到anylocaladdress（通常为0.0.0.0或::0)。您可以通过使用正确的ip地址设置network.bind_host来更改这一点。

参考[1.3]“模块”网络设置

更新：

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
echo 1 > /proc/sys/net/ipv6/conf/default/disable_ipv6

或

sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1

之后，必须在elasticsearch.yml中更改具有各自IP的两个节点中network.bind_host的值

# Elasticsearch, by default, binds itself to the 0.0.0.0 address, and listens
# on port [9200-9300] for HTTP traffic and on port [9300-9400] for node-to-node
# communication. (the range means that if the port is busy, it will automatically
# try the next port).
# Set the bind address specifically (IPv4 or IPv6):
#
network.bind_host: 10.0.0.1
# Set the address other nodes will use to communicate with this node. If not
# set, it is automatically derived. It must point to an actual IP address.
#
network.publish_host: 10.0.0.1

或设置

# Set both 'bind_host' and 'publish_host':
#
network.host: 10.0.0.1