11. Troubleshooting

1. rc.sanet dbshell does not work
2. RRDTool

1. Graphs are not drawn

1. Performance

1. Nightly script
2. Refresh is too slow

11.1. rc.sanet dbshell does not work

You can’t connect to database. Problems could be:

• The database server is not running

  The message is something like

  psql: could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket “/var/run/postgresql/.s.PGSQL.5432”?

  You should start postgresql server. Probably you have an init script in /etc/init.d or /etc/rc.d

• Database or role “xxxx” does not exist

  The message is something like

  psql: FATAL: database “sanet” does not exist

  or

  psql: FATAL: role “sanet” does not exist

  You must create the “sanet” database. See Create your own user and database

11.2. RRDTool

Required version at least 1.2.26

11.2.1. Graphs are not drawn

Check apache2 log files.

Try to load the specific url in your browser and check if you get the graph image. The url is in the format:

http[s]://<hostport>/sanet/state/node/<nodeID>/rttgraph/?interval=480m

for RTT graphs or in the format:

http[s]://<hostport>/sanet/state/measure/<measureID>/mgraph/?interval=480m

for measure graphs.

If no image is visualized, check your apache2 error_log. Sometimes rrdtool not found messages are logged due to the fact that /usr/local/bin has not been set in Apache2 PATH.

11.2.2. Data are not written to RRD file

TBD

11.3. Performance

11.3.1. Nightly script

Make sure that nightly maintenance script is running periodically. In example if cron is installed on your system, set it up to be performed daily wit the following crontab entry: 45 4 * * * /etc/rc.d/rc.sanet nightly > /var/tmp/lastoutput.sanet.nightly 2>&1

11.3.2. Refresh is too slow

Refresh is a slow operation. The refresh of the whole site should be avoided unless strictly necessary. To update single nodes (refreshing or not the related interfaces) the command refresh node <node name> [interfaces] can be used.