I want to connect my elasticsearch cluster from another machine i went through some documentation where they had mentioned that i had change the network.bind_host : 0 .But i didn't find the network.bind_host in my elasticsearch.yml . I got only network.host in my elasticsearch.yml file.Even i tried it by giving as
network.host :0 but i cant able to connect from another machine. And i also tried removing ## before network.host :0 which throws an error when starting elasticsearch cluster.
When i am connecting from another machine i have to give http://clustermachingip:9200 right?
Can anyone please help on this problem?
Thanks..
When you want to connect to an elasticsearch instance of an another machine, yes the address is http://clustermachingip:9200. Can you try setting network.bind_host: clustermachingip
If this doesn't work then you might want to check the connectivity to the machine you are trying to connect to using something like a ping command.
ping clustermachingip
EDIT:
You can just start elasticsearch in one machine and try one of the following curl commands from the other machine.
curl 'clustermachingip:9200/_cat/nodes?v'
curl 'clustermachingip:9200/_cat/health?v'
EDIT2: Clearing out confusion between network.host, network.bind_host
https://www.elastic.co/guide/en/elasticsearch/reference/2.4/modules-network.html#advanced-network-settings
The network.host setting explained in Commonly used network settings
is a shortcut which sets the bind host and the publish host at the
same time. In advanced used cases, such as when running behind a proxy
server, you may need to set these settings to different values:
network.bind_host
This specifies which network interface(s) a node should bind to in order to listen for incoming requests. A node can bind to multiple
interfaces, e.g. two network cards, or a site-local address and a
local address. Defaults to network.host. network.publish_host
The publish host is the single interface that the node advertises to other nodes in the cluster, so that those nodes can connect to it.
Currently an elasticsearch node may be bound to multiple addresses,
but only publishes one. If not specified, this defaults to the “best”
address from network.host, sorted by IPv4/IPv6 stack preference, then
by reachability.
Set your network.host in elasticsearch.yml to 0.0.0.0 i.e. it will listen on all available bound addresses.
network.host: 0.0.0.0
Check your connectivity to the host machine on the port (in case you haven't changed the port it will be 9200).
In case you are not able to connect to the host machine still, I will suggest checking your iptables and allow connections to port 9200.
Related
I have installed and configured a 3 monetdb nodes cluster on 3 virtual machines on my MacBook (Using Oracle Virtual Box). I use MonetDB 5 server 11.37.7
I have followed the Cluster Management documentation of MonetDB, but the monetdb discover command only returns the dbfarm of the local instance. Each node still isn't aware of other nodes.
I can connect to any nodes from any other node using monetdb -h [host] -P [passphrase], I can also discover the remote farms of a specific host by using monetdb -h host -P passphrase discover
The answer to this question monetdb cluster management can't setup helped me in setting the listenaddr property to 0.0.0.0, but still, the discover command only returns the local monetdb farm.
EDIT
Thanks to Jennie suggestion below, I noticed that the monetdb log file contains error while sending broadcast message: Network is unreachable.
I used netcat utility to brodcast UDP message from one node to the other 2 and it worked, I can ping, ssh and the 3 nodes are part of the same network configured with virtualbox, but the error is still there.
All your VMs must be in the same LAN environment. monetdb discover basically goes over all IP addresses under the same subnet.
Can you some how verify that's the case?
I got it working, thanks to #Jennie's post. For anyone using VirtualBox:
Use the first network adapter of each configured node with Bridge access instead of NAT
Configure the following property of your dbfarm: listenaddr=0.0.0.0
For testing purpose, it may be worth reducing the property discoveryttl to less than the default 10mns
I'm having problems trying to connect to Elasticsearch (ES) on an EC2 instance from my local linux box via the EC2 instance public ip i.e. curl [PUBLIC_IP]:9200
I followed the steps in this guide: https://github.com/miztiik/elk-stack/tree/master/ElasticSearch.
My ES version is 6.8.9
Here's what's working and what's not:
On ES EC2 instance: curl localhost:9200 works
On another instance with same VPC: curl [PUBLIC_IP]:9200 works
On my local linux box: curl [PUBLIC_IP]:9200 doesn't work, however telnet [PUBLIC_IP] 9200 works i.e. it connects and gives me the escape character '^]'
My /etc/elasticsearch/elasticsearch.yml config has the following:
http.enabled: true
http.port: 9200
network.host: 0.0.0.0
http.cors.allow-origin: "*"
http.cors.enabled: true
There is only one (new) security group attached to the EC2 instance, which has the following inbound rules:
I also confirmed that the EC2 instance is in a public subnet i.e. connected to an internet gateway.
Thanks for any help.
Update
I also installed Apache httpd on the instance and rechecked everything. Here is the current state of things:
I can ping, telnet and connect to the web server (:80) from the outside.
I cannot connect to Elasticsearch (:9200) or Kibana (:5601) from the outside. All these I can however do within the VPC from another instance.
This sounds firewall related.
Check on the ECE2 security group and either modify the default Sec group or create new one and associate it with your instance.
For a test, modify your inbound as for your port as:
0.0.0.0/0 IPv4
And set network host as follows
network.host: _ec2 # if using the plugin
Otherwise
network.host: "{elastic_ip}”
If your ece2 instance doesn’t have public dns, you will have to edit your/etc/hosts file and add the IP address of your instance
network.bind_host
This specifies which network interface(s) a node should bind to in order to listen for incoming requests. A node can bind to multiple interfaces, e.g. two network cards, or a site-local address and a local address. Defaults to network.host.
network.publish_host
The publish host is the single interface that the node advertises to other nodes in the cluster, so that those nodes can connect to it. Currently an Elasticsearch node may be bound to multiple
https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-network.html
https://discuss.elastic.co/t/elasticsearch-only-accessible-from-localhost/65782/3
https://www.elastic.co/blog/running-elasticsearch-on-aws
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/working-with-security-groups.html#describing-security-group
How do I enable remote access/request in Elasticsearch 2.0?
I had the same issue on AWS. Try using the public DNS or the private IP in lieu of the public IP to connect another ec2 instance in the same VPC.
Every guide or post about this topic says to just set network.host: 0 in the elasticsearch.yml file. However I tried that, along with applying other troubleshooting methods, and nothing seems to work. I'm starting to think maybe the configuration is right, but I am not connecting to it the right way?
This is what my yml file looks like,
discovery.seed_hosts: []
network.publish_host: xx.xxx.xxx.51
network.host: 0.0.0.0
The elastic search server is hosted on an Azure virtual machine. Then when I try to connect to it via curl on my local machine I get a Failed to Connect, Timeout Error.
curl http://xx.xxx.xxx.51:9200
The issue was with the network settings which was blocking all the incoming traffic and once incoming traffic on port 9200, default port of Elasticsearch allowed, the issue got resolved.
Just for the reference, you just need to have network.host: 0.0.0.0 config to make sure Elasticsearch isn't using the loopback address and this by default kicks in the production checks which can be avoided in case you are just running a single node discovery.type:single-node, this helps to troubleshoot such issues.
I have a question reagrdless testing a server and playing around with it. I have set up a local elasticsearch databse and kibana. Now I want to connect to the server from antoher PC on the same network.
My questions are, is that server already up and able for access or do I need apache/wamp or smth third to get the local elastic online for other useres? How to connect to the server when it's up? All the usefull info would be appreciated!
By default Elasticsearch listen on loopback interface (localhost / 127.0.0.1).
You must change configuration. Edit the file elasticsearch.yml like this :
network.host: 0.0.0.0
For listening on all IP addresses of your computer.
Looks like elastic search is not discoverable without setting the box's ip address in this property : network.host .
Why cant it just bind to the box's ip address(like it happens in application servers like rest apps).
Why is there even a provision to bind to a particular ip address?
The key property that matters is network.publish_host. You configure this indirectly via network.host. The publish host is the address that nodes advertise to other nodes as the address to be reached on when they join the cluster. So, it needs to be something that is reachable from the other nodes. E.g. 127.0.0.1 would not work for this; likewise a loadbalanced address won't work either.
Also see documentation for these properties
Many servers have multiple network interfaces and a common problem before this change was Elasticsearch picking the wrong one for the publish host and then failing to cluster because the nodes ended up advertising the wrong address to each other. Since Elasticsearch cannot know the right interface, you have to tell it.
This change has been introduced in 2.0 as explained in the breaking changes > network changes documentation:
This change prevents Elasticsearch from trying to connect to other nodes on your network unless you specifically tell it to do so. When moving to production you should configure the network.host parameter
The ES folks also released a blog article back then to explain the underlying reasons for this change, i.e. mainly to prevent your node from accidentally binding to another cluster available on the network.
To run on a local network a single node I added these to my
un-comment or comment
elasticsearch.yml
http.port: 9201
http.bind_host: 192.168.1.172 #works
or
http.port: 9201
http.publish_host: 192.168.1.172 #by itself does not work
http.host: 192.168.1.172 #works alone