What is the parameter to be set to elastic search does not allow the creation of automated cluster?
And what happened if a cluster is automatically created?
Elastic search creates the cluster based on the nodes . For node discovery we can use Multicast or Uni-cast
In general development environment we use multicast discovery to true , so that is discoverable . In production we need to use unicast and specify the names as mentioned below and disable the multicast to false.
discovery.zen.ping.multicast.enabled: false
discovery.zen.ping.unicast.hosts: ["host1", "host2:port"]
The cluster name is configured
#cluster.name: elasticsearch
All these setting are in config folder of Elastic search and will be available in elasticsearch.yml file.
Related
I have gke clusters, and I have elasticsearch deployments on elastic.co. Now on my gke cluster I have network policies for each pod with egress and ingress rules. My issue is that in order to use elastic APM I need to allow egress to my elastic deployment.
Anyone has an idea how to do that? I am thinking either a list of IPs for elastic.co on the gcp instances to be able to whitelist them in my egress rules, or some kind of proxy between my gke cluster and elastic apm.
I know a solution can be to have a local elastic cluster on gcp, but I prefer not to go this way.
About the possibility of using some kind of Proxy between your gke cluster and elastic apm. You can check the following link [1], to see if it can fit your necessities.
[1] https://cloud.google.com/vpc/docs/special-configurations#proxyvm
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.
So I'm trying to configure Elastic Search to be able to access it from another machine in my network.
I've been searching and trying different things but none of them is working.
Already configured firewall and I set network.host: 0.0.0.0 on elasticsearch.yml file. But still can't get access on [ES_host_ip]:9200 from the other machine.
I want to setup Elastic-Search cluster. As it is a distributed system, I should be able to add more nodes on the fly(meaning: adding new nodes after it is deployed once). How is this done and how does Elastic-search manage to do it?
Elasticsearch handles this using Zen Discovery
The zen discovery is the built in discovery module for elasticsearch
and the default. It provides unicast discovery, but can be extended to
support cloud environments and other forms of discovery.
This is done through elasticsearch.yml configuration file. You have two options - multicast and unicast:
Multicast lets your new node to connect to your cluster without specifying IPs, however it's not recommended.
Unicast. You specify a list of nodes in your cluster (their IPs).
Both ways, your started node will try to ping other nodes and if their cluster names are matching, it will join it.
Configuration example:
cluster.name: elasticsearch_media
node.name: "media-dev"
node.master: true
node.data: true
discovery.zen.ping.multicast.enabled: false
discovery.zen.ping.unicast.hosts: ["153.32.228.250[9300-9400]", "10.122.234.19[9300-9400]"]
All you have to do is to edit the main configuration file on your new node and change the cluster name to the cluster you are currently running. Of course the new node must be discoverable. This depends on your network settings.
Try to write a script which will accept command line arguments about cluster name and IP addresses, authentications etc.,
This script will open and modify elasticsearch.yml file on the remote server.
I have 2 Linux VM's (both at same datacenter of Cloud Provider): Elastic1 and Elastic2 (where Elastic 2 is a clone of Elastic 1). Both have same version centos, same cluster name, and same version ES, again - Elastic2 is a clone.
I use the service wrapper to automatically start them both at boot, and introduced each others ip to their respective iptables file, so now I can successfully ping between nodes.
I thought this would be enough to allow ES to form a cluster, but to no avail.
Both Elastic1 and Elastic2 have 1 index each named e1 and e2 respectfully. Each index has 1 shard with no replicas.
I can use the head and paramedic plugins on each server successfully. And use curl -XGET 'http://localhost:9200/_cluster/nodes?pretty=true' to validate the cluster name is the same and each server only has 1 node listed.
Is there anything glaring out at why these nodes arent talking? Ive restarted the ES service and rebooted on both servers to no avail. Could cloning be the problem??
In your elasticsearch.yml:
discovery.zen.ping.multicast.enabled: false
discovery.zen.ping.unicast.hosts: ['host1:9300', 'host2:9300']
So, just list your node IPs with the transport port (default is 9300) under unicast hosts. Multicast is enabled by default, but is generally impossible on cloud environments without use of external plugins.
Also, make sure to check your IP rules / security groups! That's easy to forget.