Installation process about elassandra HOT 18 CLOSED

What is the problem exactly?

I was able to get the latest release running without installing Cassandra. As far as my understanding goes, elassandra is your cassandra database. It just has the elastic search stuff included. That being said, I'm currently using release 2.1.1 and to get it working I did install datastax's cassandra first.

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Thanks for the reply.

Here is one of the steps

Trying to install the cqlsh: (missing a file or something ..)

sanny@vm1:/home/elassandra# python pylib/setup.py
python: can't open file 'pylib/setup.py': [Errno 2] No such file or directory

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And another problem

sanny@vm1:/home/elassandra/bin# cqlsh
Traceback (most recent call last):
File "/usr/bin/cqlsh.py", line 152, in
from cqlshlib import cql3handling, cqlhandling, pylexotron, sslhandling
ImportError: cannot import name sslhandling

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For cqlsh, I installed it with pip. After that you should have cqlsh, cqlshlib and cqlsh.py in /usr/bin/.
Additionally, to use cqlsh you need to use Python 2.7. I don't know about Ubuntu, but Red Hat comes with Python 2.6 out of the box.

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Yes I do have it.
/usr/lib/pymodules/python2.7/cqlshlib#
But still when I try to run it I get the same error. Also install with pip install cqlsh.

sanny@vm1:/home/elassandra/bin# cqlsh
Traceback (most recent call last):
File "/usr/bin/cqlsh.py", line 152, in
from cqlshlib import cql3handling, cqlhandling, pylexotron, sslhandling
ImportError: cannot import name sslhandling

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Have you also installed zlib-devel and openssl-devel?

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Nope , I assume I should. Is it specified somewhere ?

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Sorry already there .... my mistake

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cqlsh in elassandra (and cassandra 2.2+) require python 2.7. With redhat 6.x, install Software Collection from Redhat, then run the following command to overload python27 in your bash.
#scl enable python27 bash

Then install the cassandra driver (pip install cassandra-driver).

from elassandra.

Thank you for your reply.
So Ubuntu will not work?

from elassandra.

Yes, as soon as you apply elasticsearch 2.1.1 and cassandra 2.2.x requirements, it should work on Ubuntu.

from elassandra.

It should work on ubuntu I use it on debian ;-)

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I am really fighting with this installation, can someone please send out one step install. I really missing something:
option 1; from source git clone the repo from github.
option 2: tarball repository but the link is 404.

What is the correct way?

Can you write some simple install process?

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The tarball can be found on https://github.com/vroyer/elassandra/releases
If the setup of the machine is correct, just untar the downloaded tarball, edit your cassandra.yaml file, and then start up cassandra.

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I am trying to install this and am kind of lost. Can someone clarify that i have to have elasticsearch and cassandra installed before i install elassandra. I am trying to install it on centos 7. So also if someone can confirm that it should work on it.

from elassandra.

Hi,
Just install the elassandra tarball, it includes cassandra 2.2.5 and elasticsearch 2.1.1.
Yes, it works on redhat and it should work on centos.
Regards,
Vincent.

Le 19 mai 2016 à 19:18, chevalier2k a écrit :

I am trying to install this and am kind of lost. Can someone clarify that i have to have elasticsearch and cassandra installed before i install elassandra. I am trying to install it on centos 7. So also if someone can confirm that it should work on it.

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Hi Vincent,

Is there a gracefull way to starting and stopping elassandra. By the way i did get it to work. Also when i start kibana after reboot, elasticsearch complains that index already exists.

Thanks
Vivek

from elassandra.

Hi Vivek,

Cassandra stop/start are documented there https://docs.datastax.com/en/cassandra/2.0/cassandra/reference/referenceStartStopTOC.html

Cassandra include a shutdown hook, a dedicated thread to finish ongoing writes regardless of the way you stop it (kill, nodetool stopdaemon, etc...).
In Elassandra, elasticsearch write requests are transformed to CQL writes managed by cassandra.
When elassandra restart, cassandra first replay commit logs and re-index your document.

In order to restart faster, you can flush cassandra before stopping (nodetool flush), but there is nothing special to makes gracefull stop/start.

Regards,
Vincent.

Le 20 mai 2016 à 05:03, chevalier2k a écrit :

Hi Vincent,

Is there a gracefull way to starting and stopping elassandra. By the way i did get it to work.

Thanks
Vivek

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