I have a cluster of 4 elasticsearch servers and was wondering if curator will remove indices from the entire cluster when ran from one server or if I need to run it on all servers?
It deletes from the whole cluster. It uses the Elasticsearch API, rather than any file system logic.
Related
i have elasticsearch cluster running. as of now there is no backup enabled till now neither S3 or NAS. we want to upgrade elasticsearch cluster on a new servers and the data size is 100gb of 2 indexes.
since we dont have backup, can we copy the data stored directory from the running cluster on all three nodes to a new cluster will this work?
current running version of es:6.2.3 to es:6.3.4
please advice.
Thanks in advance.
Taking a copy of indices folder on the running system of your elasticsearch cluster and restoring on the new es-cluster working fine.
Thanks to #Andreas Volkmann
I have a elasticsearch 5.6.2 cluster with one master and two data nodes and I am using Kibana for visualizing . I want to enable automatic snapshots for the elasticsearch cluster to Amazon-s3 every 30mins. Can I Know How Can I accomplish it ..? There is no proper Documentation . I had also refered curator docs and I have a question, DO I need to configure that curator or on each node ...?
Please help guys
Curator is an external process.
You must put it on one single machine. It can be a node or any other machine.
It will send REST requests to elasticsearch when needed.
Put in your crontab and that is going to be ok.
You can also call the SNAPSHOT endpoint manually from a shell script every 30 minutes and don’t use curator at all.
Elastic cloud does a backup every 30 minutes (in case you don’t want to manage the cluster yourself and have that kind of advanced features like also rolling upgrades, Kibana, security...)
I have installed elastic search on my ubuntu system and it's working fine with default cluster.
But i want to create another cluster.
I have checked official document of elastic search but i haven't found any steps for create another or multiple cluster.
You need to update ES_HOME/config/elasticsearch.yml. Under the cluster section, change the cluster name parameter.
cluster.name: my_cluster
Default value for cluster name is elasticsearch
One instance of ES can be a part of only one cluster. If all ES instances / machines have the same cluster name, elasticsearch will form a cluster automatically as long as the machines are all on the same network
I want to run logstash -> elasticsearch with high availability and cannot find an easy way to achieve it. Please review how I see it and correct me:
Goal:
5 machines each running elasticsearch united into a single cluster.
5 machines each running logstash server and streaming data into elasticsearch cluster.
N machines under monitoring each running lumberjack and streaming data into logstash servers.
Constraint:
It is supposed to be run on PaaS (CoreOS/Docker) so multi-casting
discovery does not work.
Solution:
Lumberjack allows to specify a list of logstash servers to forward data to. Lumberjack will randomly select the target server and switch to another one if this server goes down. It works.
I can use zookeeper discovery plugin to construct elasticsearch cluster. It works.
With multi-casting each logstash server discovers and joins the elasticsearch cluster. Without multicasting it allows me to specify a single elasticsearch host. But it is not high availability. I want to output to the cluster, not a single host that can go down.
Question:
Is it realistic to add a zookeeper discovery plugin to logstash's embedded elasticsearch? How?
Is there an easier (natural) solution for this problem?
Thanks!
You could potentially run a separate (non-embedded) Elasticsearch instance within the Logstash container, but configure Elasticsearch not to store data, maybe set these as the master nodes.
node.data: false
node.master: true
You could then add your Zookeeper plugin to all Elasticsearch instances so they form the cluster.
Logstash then logs over http to the local Elasticsearch, who works out where in the 5 data storing nodes to actually index the data.
Alternatively this Q explains how to get plugins working with the embedded version of Elasticsearch Logstash output to Elasticsearch on AWS EC2
I am trying to setup a multi node elastic search cluster.Any useful link which i can follow to setup cluster.
I am trying to run a map reduce programe in cluster to find out exact matches .
From my experience, if you just run the executable in two or more machines connected via a network, elasticsearch will somehow figure it out and all nodes will be added to the same cluster. I don't think you have to do anything.
This is the tutorial I've used: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/setup.html
Here you have a step by step guide on how to setup an EMR cluster with Elasticsearch and Kibana installed using the bootstrap actions mentioned before.
http://blogs.aws.amazon.com/bigdata/post/Tx1E8WC98K4TB7T/Getting-Started-with-Elasticsearch-and-Kibana-on-Amazon-EMR
The article also provides basic Elasticsearch tests on the installed cluster.
The bootstrap actions also provide the Elasticsearch-Hadoop plugin that will allow you to run Mapreduce or other Hadoop applications.
Last version of Elasticsearch Bootstrap actions are available here:
https://github.com/awslabs/emr-bootstrap-actions/tree/master/elasticsearch
The only thing to cluster two elasticsearch node is, identical cluster name of elasticsearch nodes.you can find cluster name elasticsearch.yml file.[you can find the file in config folder of elasticsearch ].The default cluster name is elasticsearch.
To change name edit the property in elasticsearch.yml
cluster.name: "custom cluster name"
Elasticsearch uses zen discovery to find the the nodes in cluster during start up.If the cluster name is identical the elasticsearch ll automatically form the cluster.
Check out this link. You need to install the Amazon Powershell but replace the variables in the script for what you want and it should launch a EMR with elasicsearch.
https://github.com/awslabs/emr-bootstrap-actions/tree/master/elasticsearch
you can use kubernetes to create a cluster of elasticsearch nodes running inside docker containers
take a look at
https://github.com/kubernetes/kubernetes/tree/master/examples/elasticsearch