Nodes are not joining cluster

Hello,

I am trying to build a 3-node Elasticsearch cluster. I am using Elasticsearch 7.3. When I check the health of the cluster, it tells me the number of nodes = 1.

Here are the node settings for all three:

Start config

Node 1:

cluster.name: elastic

node.name: node-1
node.data: true
node.ingest: true
node.master: true

network.host: 10.10.1.176
http.port: 9200

discovery.seed_hosts: ["10.10.1.176", "10.10.1.175", "10.10.1.174"]
cluster.initial_master_nodes: [node-1, node-2, node-3]

Node 2:

cluster.name: elastic

node.name: node-2
node.data: true
node.ingest: true
node.master: true

network.host: 10.10.1.175
http.port: 9200

discovery.seed_hosts: ["10.10.1.176", "10.10.1.175", "10.10.1.174"]
cluster.initial_master_nodes: [node-1, node-2, node-3]

Node 3:

cluster.name: elastic

node.name: node-3
node.data: true
node.ingest: true
node.master: true

network.host: 10.10.1.174
http.port: 9200

discovery.seed_hosts: ["10.10.1.176", "10.10.1.175", "10.10.1.174"]
cluster.initial_master_nodes: [node-1, node-2, node-3]

End config

[root@elk-node2 ~]# curl -X GET "10.10.1.176:9200/_cluster/health?pretty"
{
"cluster_name" : "elastic",
"status" : "green",
"timed_out" : false,
"number_of_nodes" : 1,
"number_of_data_nodes" : 1,
"active_primary_shards" : 0,
"active_shards" : 0,
"relocating_shards" : 0,
"initializing_shards" : 0,
"unassigned_shards" : 0,
"delayed_unassigned_shards" : 0,
"number_of_pending_tasks" : 0,
"number_of_in_flight_fetch" : 0,
"task_max_waiting_in_queue_millis" : 0,
"active_shards_percent_as_number" : 100.0

Seeing this error in the logs from Node1:

[node-1] failed to join {node-3}{_OMhWTqIQPy-jLCwmQJSRg}{xd5r4ZdrT0-W6sx5MkGkEQ}{10.10.1.174}{10.10.1.174:9300}{dim}{ml.machine_memory=2267451392, ml.max_open_jobs=20, xpack.installed=true} with JoinRequest{sourceNode={node-1}{Wt3QxGcdRbuIwbKaz4r4BQ}{tp4ZhtCqTJGql7-Fmyyp4Q}{10.10.1.176}{10.10.1.176:9300}{dim}{ml.machine_memory=2496040960, xpack.installed=true, ml.max_open_jobs=20}, optionalJoin=Optional.empty}