Elasticsearch 8.7 2-node cluster

Elastic Stack Elasticsearch
1

Hello,
I want to create 2-node cluster and it doesn't work

node-01:

path.data: /bitnami/elasticsearch/data
cluster.name: zephyr
node.name: node-01
node.roles: [ master, data ]
http.port: 9200
transport.port: 9300
bootstrap.memory_lock: false
network.host: 192.168.9.100
discovery.seed_hosts: ["192.168.9.100", "192.168.9.101"]
cluster.initial_master_nodes: ["192.168.9.100", "192.168.9.101"]
xpack.security.enabled: false
xpack.ml.enabled: false

node-02:

path.data: /bitnami/elasticsearch/data
cluster.name: zephyr
node.name: node-02
node.roles: [ master, data ]
http.port: 9200
transport.port: 9300
bootstrap.memory_lock: false
network.host: 192.168.9.101
discovery.seed_hosts: ["192.168.9.100", "192.168.9.101"]
cluster.initial_master_nodes: ["192.168.9.100", "192.168.9.101"]
xpack.security.enabled: false
xpack.ml.enabled: false

this is from log file

[2023-05-18T13:14:14,444][WARN ][o.e.d.PeerFinder         ] [node-01] address [192.168.9.101:9300], node [null], requesting [false] discovery result: [][192.168.9.101:9300] connect_timeout[30s]
[2023-05-18T13:14:23,341][WARN ][o.e.c.c.ClusterFormationFailureHelper] [node-01] master not discovered yet, this node has not previously joined a bootstrapped cluster, and this node must discover master-eligible nodes [192.168.9.100, 192.168.9.101] to bootstrap a cluster: have discovered [{node-01}{qqKIXW1hSpS82grs1vyO9Q}{tdAEZHpFQxaFINtgSNQ6Rg}{node-01}{192.168.9.100}{192.168.9.100:9300}{dm}{8.7.0}]; discovery will continue using [192.168.9.101:9300] from hosts providers and [{node-01}{qqKIXW1hSpS82grs1vyO9Q}{tdAEZHpFQxaFINtgSNQ6Rg}{node-01}{192.168.9.100}{192.168.9.100:9300}{dm}{8.7.0}] from last-known cluster state; node term 0, last-accepted version 0 in term 0; for troubleshooting guidance, see https://www.elastic.co/guide/en/elasticsearch/reference/8.7/discovery-troubleshooting.html

I don't understand this and I need some help what is wrong in this configuration.
Can anyone help me with that?

2

I believe the cluster.initial_master_nodes list must contain node names, e.g node-01 and node-02. Please have a look at the docs for further details.

Also note that in order to achieve high availability you need a minimum of 3 nodes in the cluster.

3

Port 9300 should be opened on both servers

1 Like
4

Hi,
when these 2 nodes start working w/o errors I'll add 3rd node. Tomorrow I'll change IPs with names and I let you know if it works.

5

I turned off firewall and it works, I also added 3rd node for high availability.

6

You don't need to disable firewall, just open the port 9300.

7

ok, I'll try to open port.