How to bind the public IP?

Elastic Stack Elasticsearch
1

Hi All,
I have 4 node prepare to 1 master (172.20.9.45, 192.168.1.1) and 3 data node (192.168.1.11 ~13). The 172.20.9.x is public LAN, 192.168.1.x is private LAN by hub. The ES version : 7.4.0

these is my elasticsearch.yml for per node.
Master node:
node.name: oaelk2-em01
node.master: true
node.data: false
network.host: oaelk2-em01
discovery.seed_hosts: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]
cluster.initial_master_nodes: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]

Data node (oaelk2-ed01)
node.name: oaelk2-ed01
node.master: false
node.data: true
network.host: oaelk2-ed01
discovery.seed_hosts: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]
cluster.initial_master_nodes: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]

Data node (oaelk2-ed02)
node.name: oaelk2-ed02
node.master: false
node.data: true
network.host: oaelk2-ed02
discovery.seed_hosts: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]
cluster.initial_master_nodes: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]

Data node (oaelk2-ed03)
node.name: oaelk2-ed03
node.master: false
node.data: true
network.host: oaelk2-ed03
discovery.seed_hosts: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]
cluster.initial_master_nodes: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]

These is /etc/hosts for per node (master & data node)
192.168.1.1 OAELK2-EM01
192.168.1.11 OAELK2-ED01
192.168.1.12 OAELK2-ED02
192.168.1.13 OAELK2-ED03

But just only use 192.168.1.1 can connect to ES Master, 172.20.9.45 Can't to connect .

[root@OAELK2-EM01 data]# curl http://192.168.1.1:9200/_cat/nodes?v
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
192.168.1.12 2 25 0 0.00 0.01 0.05 dil - oaelk2-ed02
192.168.1.11 2 24 0 0.00 0.01 0.05 dil - oaelk2-ed01
192.168.1.13 2 25 0 0.00 0.01 0.05 dil - oaelk2-ed03
192.168.1.1 2 24 0 0.00 0.01 0.05 ilm * oaelk2-em01
[root@OAELK2-EM01 data]# curl http://172.20.9.45:9200/_cat/nodes?v
curl: (7) Failed connect to 172.20.9.45:9200; Connection refused

How to bind the public IP??? Thank a lot.

2

your /etc/hosts only contains 192.168 ips, you bind to hosts mentioned in the /etc/hosts - can you explain why you then expect to bind to another IP address that has not been specified anywhere? Maybe I am missing something in the configuration setup.

You can set the network.host setting to be bound to an interface or simply 0.0.0.0 to listen to all interfaces.

3

Hi,
Thank for your reply. Because all node in private LAN, just only master node need to accept request from outside, so the master node have 2 IP (172.20.9.45, 192.168.1.1) .
I has try to add the public IP in /etc/hosts and change network.host to 0.0.0.0 for per node. but it still not successful. the data node can't discover master node.

/etc/hosts (per node)
172.20.9.45 OAELK2-EM01
192.168.1.1 OAELK2-EM01
192.168.1.11 OAELK2-ED01
192.168.1.12 OAELK2-ED02
192.168.1.13 OAELK2-ED03
Master node
cluster.name: es_c2
node.name: oaelk2-em01
node.master: true
node.data: false
network.host: 0.0.0.0
discovery.seed_hosts: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]
cluster.initial_master_nodes: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]
Data node (oaelk2-ed01)
cluster.name: es_c2
node.name: oaelk2-ed01
node.master: false
node.data: true
network.host: 0.0.0.0
discovery.seed_hosts: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]
cluster.initial_master_nodes: ["oaelk2-em01", "oaelk2-ed01", "oaelk2-ed02", "oaelk2-ed03"]
Data node can't discover master node.
[root@OAELK2-EM01 data]# curl http://172.20.9.45:9200/_cat/nodes?v
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
172.20.9.45 1 24 0 0.01 0.06 0.06 ilm * oaelk2-em01
[root@OAELK2-EM01 data]# curl http://192.168.1.1:9200/_cat/nodes?v
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
172.20.9.45 1 24 0 0.01 0.06 0.06 ilm * oaelk2-em01
Data node log:
[2019-11-12T17:20:55,306][WARN ][o.e.c.c.ClusterFormationFailureHelper] [oaelk2-ed01] master not discovered yet: have discovered [{oaelk2-ed01}{_0R4mR4aS1-aPfJAUYK1ww}{x-Bo4flrQjy2flKQ_a00YQ}{192.168.1.11}{192.168.1.11:9300}{dil}{ml.machine_memory=152102723584, xpack.installed=true, ml.max_open_jobs=20}]; discovery will continue using [192.168.1.1:9300, 172.20.9.45:9300, 192.168.1.12:9300, 192.168.1.13:9300] from hosts providers and from last-known cluster state; node term 17, last-accepted version 78 in term 17

4

Hi,
I had resolved my issue. Add the network.bind_host and network.publish_host in master node. it's work.
network.bind_host: ["192.168.1.1","172.20.9.45"]
network.publish_host: 192.168.1.1

Thank a lot.

5

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