Elasticsearch: setting up cluster with two nodes

[Techmod]

I've set two master nodes in my cluster but it only shows "elastic-master" not "elastic-slave".(second node is not shown).How can I resolve it? I've already followed Elasticsearch documents but nothing changed!

#my host file setting:

cd /etc/elasticsearch
sudo nano hosts
192.168.143.30 elastic-master
192.168.143.23 elastic-slave

#my cluster setting:

cd /etc/elasticsearch
sudo nano elasticsearch.yml
cluster.name: “cluster1”

for "elastic-master" (192.168.143.30) setting

node.name: “elastic-master”
node.master: true
node.data: true
networkhost: 192.168.143.30
discovery.zen.ping.unicast.hosts: ["192.168.143.30","192.168.143.23"]
discovery.zen.minimum_master_nodes: 2

for "elastic-slave" (192.168.143.23) setting

node.name: “elastic-slave”
node.master: true
node.data: true
networkhost:192.168.143.23
discovery.zen.ping.unicast.hosts: ["192.168.143.30","192.168.143.23"]
discovery.zen.minimum_master_nodes: 2

[Emanuil (Emanuil Tolev)]

What's in each node's logs? grep for zen-disco lines if there's too much information. I'm guessing a network problem prevents them from seeing each other.

Can you access each node from the other one? I.e. while ssh-ed into 192.168.143.30 can you telnet 192.168.143.23 9300 and the other way around?

[Christian_Dahlqvist]

Which version of Elasticsearch are you using? That configuration is no longer valid if you are using version 7.x.

[Techmod]

# ---------------------------------- Cluster ------------------------------
cluster.name: elastic-a

# ------------------------------------ Node -------------------------------
node.name: elastic-master
node.master: true
node.data: true

# ---------------------------------- Network ------------------------------
network.host: 192.168.143.30
http.port: 9200
# --------------------------------- Discovery -----------------------------
discovery.seed_hosts: ["192.168.143.30","192.168.143.23"]
cluster.initial_master_nodes: ["elastic-slave", "elastic-master"]

I just updated my config file.
I tried telnet and it worked on both sides.

[Techmod]

CentOS 7 ,Elasticsearch 7.5 and Kibana 7.5
Yes and I just updated my config file.

[Techmod]

First stopped the service (sudo service elasticsearch stop). Delete the data (sudo rm -rf /var/lib/elasticsearch/*) and restart the service (sudo service elasticsearch restart). Now work all !!