perfSONAR User Q&A and Other Discussion

[Antoine Delvaux <>]

Hello James,

Can you check cassandra is actually running before launching the migrate script?  This can be done with a simple `service cassandra status` or by checking the list of running processes.

If not, try to restart it (`service cassandra restart`) and run the script again.

If cassandra is not able to start, it would be good to have a look at the log files in /var/log/cassandra to see what are the errors.

Let us know how it goes,

Antoine.

Le 17 déc. 2018 à 22:12, Jim Nauer CWRU <> a écrit :

I'm trying to get rid of an old CentOS 6 / PS 4.0.2 setup & get it up to the supported CentOS 7 / PS 4.1.x configuration...but the very first step is failing, the backup of the old system.

I've googled around & found one reference to this problem back in the PS 4.0-RC1 timeframe -- but no answer.

When I run "/usr/lib/perfsonar/scripts/ps-migrate-backup.sh --data ~/ps-backup.tgz", I get an error on snapshotting the cassandra database:

# /usr/lib/perfsonar/scripts/ps-migrate-backup.sh --data ~/ps-backup.tgz

Backing-up users...[SUCCESS]

Backing-up groups...[SUCCESS]

Backing-up passwords...[SUCCESS]

Backing-up perfsonar configuration...[SUCCESS]

Backing-up bwctl-server configuration...[SUCCESS]

Backing-up owamp-server configuration...[SUCCESS]

Backing-up NTP configuration...[SUCCESS]

Backing-up cassandra data for esmond...Unable to snapshot cassandra database

# 

If I run the first "nodetool" comand from the backup script, I get:

# nodetool clearsnapshot esmond -t esmond_snapshot

Failed to connect to '127.0.0.1:7199': Connection refused (Connection refused)

#

This is not entirely surprising, since there is no process listening on port 7199 (on any interface - 127.0.0.1, 0.0.0.0, or the node's actual IP address).

The backup script _does_ work with the '--data' flag omitted.

So...why is cassandra (apparently) not configured the way the toolkit expects it to be, and how can I fix it?

Thanks,

  --Jim

P.S. node is running CentOS 6 + PS 4.0.2 - but was originally installed as a NetInstall back in the PS 3.0.x days, I think (updated continually via yum-cron since then).  

--

James A. Nauer                   | "I shall not yield one whit of  maturity,
Engineer III, Enterprise Systems | not grace, not respectability, to  the
University Technology, [U]Tech   | passing of time. I declare that I  shall
Case Western Reserve University  | forever be, if not a child,  certainly
(216) 368-MACS  (368-6227)       | childish"  --Kennet Shardik
USPA D-25604

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