Hello enthusiastic people.
I am a student trying to learn Elastic stack.
I have 1 node installed on my local machine. I have also successfully installed beats on my other local machine to get data and deliver it to my logstash.
My question is, what if I add another node, do I still need to install kibana and elasticsearch? Then connect it from my first node?
I just read a lot that a single node is prone to data loss.
Sorry for my noob question.
Your answer is very appreciated.
Thanks in advance.
Having a cluster with at least 3 nodes would be good to ensure data security and integrity.
A cluster can have one or more nodes.
An example scenario:
It will be easier for you to install with docker during the learning and development process. I recommend you follow the link below. This link explains how to set up an elasticsearch cluster with 3 nodes on docker.
Start a multi-node cluster with Docker Compose
Related
I looked for this in many websites, including Elastic official documentation, without success.
I have one Elasticsearch cluster with:
3 Master nodes
4 Data nodes
4 Ingest nodes
2 Client nodes
I must perform a rolling upgrade (from 5.x to 5.x) but the official docs do not explain the order based on node roles.
Should I upgrade Master nodes at first? What next? Data nodes?
I mean, I need to know which is the best way to get the whole cluster upgraded.
Thanks,
Best regards
We had a similar situation and elastic recommended upgrading master first, followed by data and then client nodes.
It's worth checking if your 5.x version has an upgrade assistant available (You see that in Kibana).
I am working on product in which we are using elasticsearch for search. Our production setup is in K8S (1.7.7) and we are able to scale it pretty well. Only thing I am not sure about is whether we should be hosting elasticsearch in k8s (it can go on dedicated host as well using label selector nodes) or it is advisable to host elasticsearch on VM than docker.
Our data set size is 2-3 GB and would go further. But this is the benchmark we can consider.
And elasticsearch cluster I am planning to have ti is - 3 master (with 2 as eligible master), one client node, and one data node. We can scale datanode and client node as data increases.
Is anyone did this before? thanks in advance.
IMO the best resource for Elasticsearch on Kubernetes is https://github.com/pires/kubernetes-elasticsearch-cluster
Note that while there are official Docker containers, no official solution for orchestration is being provided at the moment. This is currently covered by the community only.
3 master (with 2 as eligible master)
This doesn't make much sense. You'll want 3 master eligible nodes with the setting discovery.zen.minimum_master_nodes: 2 and one of the 3 nodes will be the actual master.
I want to setup an 3 node cluster setup in elasticsearch, but I unable to setup, getting error like connection refused in data machine, master machine starting fine, but it shows like 0 nodes added.
I would recommend to read tutorial first, like
https://www.digitalocean.com/community/tutorials/how-to-set-up-a-production-elasticsearch-cluster-on-ubuntu-14-04
https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery-zen.html
then ask precise question here about a specific issue.
About your question, I think you didnt configure discovery.zen.ping.unicast.host fine, so nodes dont know each other.
Also, when you post a question, please post:
elasticsearch version
environnement (AWS, VM ...)
configuration sample
Welcome at SO!
I'm using one single Linux machine and I'm running Elasticsearch as a service (I run ES with the command service elasticsearch start). My configuration has only one node so I would like to add to my cluster a new node (as a failover) to locate the replicas there.
I'm trying to follow the solution of this question but the solutions are super messy and I can't find any way to archieve my goal.
Can someone explain me (in the most clear way as I'm quite a newbye in Linux) what do I've to do to add a new node to my Elasticsearch?
Thanks in advance.
Just go to terminal and run elastic search instance again.
Your new node will be set up.You can run as many instances as you want.
I am new to cassandra, and considering it for my next bigdata project.
I have a question. Can I host it in a non-hadoop environment? If so, how many nodes I can connect?
Yes, you can. Cassandra has no dependencies other than the most
basic ones, such as Java. You can read installation guide on
official site.
Your cluster can have as many nodes as you want. There is no
described limit on the number of nodes. I read in this article that
there are clusters which contain more than 1000 Cassandra nodes.