Version Upgradation in Elasticsearch from 2.x to 5.x

Elastic Stack Elasticsearch
1

Hi Team,

I have upgraded Elasticsearch Version from 2.x to 5.x.
But the data path in old version is : data/elasticsearchCluster/nodes/0/indices, and that of new new version is : data/nodes/0/indices

How can I copy the indices from Old version to new one..since the new version has additional feature like encryption.

Note:- "path.data" in both cases is set to : /elasticsearch_home/data

Thanks,

Gayathri

2

Elasticsearch upgrades what is needed. You don't need to touch physical directories.

3

How Can I migrate the existing indeces to latest version.
When I copied the data folder, I got error an message like :data/elasticsearchCluster/nodes/0/indices location is not writable.....

4

Check your permissions.

5

yes, I It had 775 permission..
I have deleted the data folder from V5 directory and restarted again.. and now new index is created on location :
data/nodes/0/indices..

I want my existing indeces to be added to the latest version...

6

Do you mean that you removed all existing data?

But if you removed them how can you get them back?

Did you read Upgrading Elasticsearch | Elasticsearch Guide [5.2] | Elastic?

Worse case, you can reindex in a new 5.0 cluster from an old 2.x cluster with: Reindex to upgrade | Elasticsearch Guide [5.2] | Elastic

7

As I said in the previous post, I have copied the data folder from old version.
While starting the elasticsearch I was getting "location is not writable....." error message..

[
default index path in old version is : data/elasticsearchCluster/nodes/0/indices, and that of new version is : data/nodes/0/indices
]

So I deleted the data folder, and tried to restart the elasticsearch, then the error gone and new index created on path:data/nodes/0/indices..

I have back up of my indeces on my old version's folder...PFB, the directory structure:

[root@localhost elasticsearch]# ls -l
total 32268
drwxrwxr-x 3 elasticsearch elasticsearch 4096 Jan 11 02:24 backup
drwxrwxr-x 9 elasticsearch elasticsearch 4096 Jan 11 22:38 elasticsearch-2.3.3
drwxrwxr-x 10 elasticsearch elasticsearch 4096 Feb 20 01:57 elasticsearch-5.0.2
-rwxrwxr-x 1 elasticsearch elasticsearch 18012 Aug 9 2016 hs_err_pid32532.log
[root@localhost elasticsearch]#

8

While starting the elasticsearch I was getting "location is not writable....." error message

It means that you don't have the write permissions on the data folder and/or one of its subfolders/files for the user who is running elasticsearch.

This is what you have to fix before doing anything else.

BTW why upgrading to 5.0 instead of 5.2.2?

9

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