Elasticsearch only binds to localhost but not IP / hostname / fqdn hostname - WHY?

Elastic Stack Elasticsearch
1

Hi there,
I am wondering: build a multinode stack. On a stack I would llike to to a:
curl -s -k -u elastic:changeme -XGET https://SOMETHING:9200/_cat/health

If SOMETHING is:
127.0.0.1 or localhost it works
machine ip / hostname / fqdn hostanme it does nothing

Running on ubuntu 20.04lts and /etc/hosts has name, fqdn name, ip set.
I tested various elasticsearchy.yml variations, but it does not work.
Any idea why or how?

Running 7.8.1
Doc: Network settings | Elasticsearch Reference [7.8] | Elastic

I would like to bid it to an Ip like 10.16.x.y, so no 192.168.x.y.
cheers
Stefano

2

You should set network.host, which is the first thing described by the docs you linked. As per those docs it defaults to _local_.

1 Like
3

At the moment I have this config running:
...

---------------------------------- Network -----------------------------------

Set the bind address to a specific IP (IPv4 or IPv6):

network.host: ["site","local"]
#network.host: ["site"]
#network.host: ["global"]
#network.host: ["global"]
#network.host: ["[ens160]"]
network.publish_host: 10.16.x,y
#network.bind_host: 0
...

4

...doing this:
network.host: ["site"]
I get the curl check just hanging while directing it to the 10.16.x.y.

5

network.bind_host and network.publish_host are advanced settings and probably just adding to your confusion.

Just set network.host to the address you want.

6

...so I did as you said.
Log:
[2021-02-23T13:09:48,771][INFO ][o.e.x.s.s.SecurityStatusChangeListener] [test-prod-master-dus301001-1.logging.msys.net] Active license is now [BASIC]; Security is enabled
[2021-02-23T13:09:48,823][INFO ][o.e.h.AbstractHttpServerTransport] [test-prod-master-dus301001-1.logging.msys.net] publish_address {10.16.x.y:9200}, bound_addresses {10.16.147.205:9200}
[2021-02-23T13:09:48,824][INFO ][o.e.n.Node ] [test-prod-master-dus301001-1.logging.msys.net] started

yml like this:

---------------------------------- Network -----------------------------------

Set the bind address to a specific IP (IPv4 or IPv6):

#network.host: ["site","local"]
#network.host: ["site"]
network.host: ["10.16.x.y"]
#network.host: ["[ens160]"]

network.publish_host: 10.16.147.205

#network.bind_host: 0

Set a custom port for HTTP:

#http.port: 9200

For more information, consult the network module documentation.

But the curl test just hangs with:
curl -s -k -u elastic:changeme -XGET https://10.16.x.y:9200/_cat/health
Any idea why?
Thank you!

7

Assuming 10.16.x.y is 10.16.147.205 I've no idea. Elasticsearch says it's listening on that address.

8

Yes, that is the IP. Telnet to that IP an 9200 works well.
Thank you anyway!

9

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