Could not communicate with the node on any of the addresses from the enrollment token

Elastic Stack Elasticsearch
1

Hey everyone,

actually doing my very first steps with elastic and want to use it with the full ELK Stack. I decided for a testing cluster of 3 elastic nodes and one kibana nodes.

The node-1 is running fine with this elasticsearch.yaml changes:

cluster.name: elk-cluster
node.name: elk1
path.data: /mnt/elk1-data
bootstrap.memory_lock: true
network.host: 10.1.201.7
transport.host: 0.0.0.0

The other nodes running with something like:

cluster.name: elk-cluster
node.name: elk2
path.data: /mnt/elk2-data
network.host: 10.1.201.8
bootstrap.memory_lock: true

Surely i've set the limits.conf to unlimited for elasticsearch memlock, changed LimitMEMLOCK to infinity in the systemd file. The JVM options are set to 50% of cpu. I've reloaded the systemd daemon after the changes on systemd.

I've generated a enrollment token on node-1 and posted it to node-2 as following command:

/usr/share/elasticsearch/bin/elasticsearch-reconfigure-node --enrollment-token <TOKEN>

The error message shows:

Unable to communicate with the node on https://10.1.201.7:9200/_security/enroll/node. Error was null
ERROR: Aborting enrolling to cluster. Could not communicate with the node on any of the addresses from the enrollment token. All of [10.1.201.7:9200] were attempted., with exit code 69

When checking the cluster log of 10.1.201.7 i cant find anything interesting else this:

[2024-11-02T00:48:29,189][WARN ][o.e.c.c.ClusterBootstrapService] [elk1] this node is locked into cluster UUID [DsT9lOc6RMml4uPZ5LWgvg] but [cluster.initial_master_nodes] is set to [elk1]; remove this setting to avoid possible data loss caused by subsequent cluster bootstrap attempts; for further information see https://www.elastic.co/guide/en/elasticsearch/reference/8.15/important-settings.html#initial_master_nodes

When doing a curl from node-2 to node-1 it works fine:

curl -k -u elastic:<REDUCTED> 'https://10.1.201.7:9200/_cluster/health?pretty'

Any idea what i'm doing wrong? Would like every hint.

//Edit
I dont know if its important...I tried multiple times multilple ways. But everytime i purged elasticsearch (apt purge elasticsearch) and took sure that the directorys (data dir, conf dir) are deleted.

Best regards