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Configuring a remote cassandra server

Solved1.61K views10th July 2023Cassandra remote
2
Arunkrishna Shreeder [SLC] [DevOps Advocate]4.00K 10th November 2020 2 Comments

Hi Dojo, would welcome your thoughts on this.

I performed a brand new DMA (say, Agent 2) installation. Now to configure the DB, there is a Cassandra DB running on a remote server. So I need to tell Agent 2 to use the database at that server. I have made the changes accordingly in db.xml, but I get the following error :

It's a standalone agent.

There is also another standalone agent (say, Agent 1), which also has a similar configuration. In the db.xml file on Agent 1, I find :
<?xml version="1.0"?>
<DataBases xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.skyline.be/config/db">
<DataBase active="True" local="true" type="Cassandra">
<ConnectString></ConnectString>
<DBServer>dataminer-cassandra1.dhdc.mgnt</DBServer>
<DSN></DSN>
<DB>SLDMADB</DB>
<UID>root</UID>
<PWD>My_Password</PWD>
<IntegratedSecurity>False</IntegratedSecurity>
</DataBase>
and this works.

And on Agent 2 I am trying to configure the db.xml as,
<?xml version="1.0"?>
<DataBases xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.skyline.be/config/db">
<DataBase active="True" local="true" type="Cassandra">
<ConnectString></ConnectString>
<DBServer>dataminer-cassandra2.dhdc.mgnt</DBServer>
<DSN></DSN>
<DB>SLDMADB</DB>
<UID>root</UID>
<PWD>My_Password</PWD>
<IntegratedSecurity>False</IntegratedSecurity>
</DataBase>
This does not work.

The cassandra.yaml on both agents are similar and seems to be correct.
The result of nodetool status command also seems to be fine.
The pings to dataminer-cassandra2.dhdc.mgnt are working and I can also see port 9042 opened on dataminer-cassandra2.dhdc.mgnt.
However, I cannot query the DB on DevCenter on both Agent 1 and 2, as I cannot create a connection. Credentials root/root, cassandra/cassandra and root/My_Password all do not work.

Am I missing something here or should I do anything else ?
Please let me know, thanks in advance

Marieke Goethals [SLC] [DevOps Catalyst] Selected answer as best 10th July 2023
Brent Alleweireldt [SLC] commented 10th November 2020

Which error gets thrown in SLDBConnection.txt, this might point to some clues as to why the connection to the remote server fails

Arunkrishna Shreeder [SLC] [DevOps Advocate] commented 11th November 2020

Actually, the customer had different credentials to login to DevCenter, so once I got hold of it I was able to configure the cassandra DB. Thank you for the help.

1 Answer

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Wale Oguntoyinbo [SLC] [DevOps Advocate]3.35K Posted 10th November 2020 1 Comment

Can you check that this line is not commented in the cassandra.yaml file:
<authenticator: PasswordAuthenticator>.

Marieke Goethals [SLC] [DevOps Catalyst] Selected answer as best 10th July 2023
Arunkrishna Shreeder [SLC] [DevOps Advocate] commented 10th November 2020

Hi Wale, yes that line is not commented. One interesting thing is, I changed the authenticator value to AllowAllAuthenticator and restarted the cassandra service(to try to bypass authentication to DevCentre), but this results in an erratic behavior of DataMiner, so I had to revert back to PasswordAuthenticator.

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