opFlow Dashboard is Bare (graphs show no data)
It appears that you are not receiving any flows, have you had a look since you restarted it, it could take 2-5 minutes to start receiving and processing net flow records.
There is a couple of things it could be, which you can verify.
1. Has the IP address of the opFlow server or virtual machine changed?
If so, change net flow configurations in the network devices to send to new IP address.
2. Verify that "flowd" is running
ps -ef | grep flowd
You should see three entries as well as the grep one, e.g.
[root@thor opmantek]# ps -ef | grep flowd root 13356 1 0 Jun18 ? 00:00:10 flowd: monitor _flowd 13357 13356 0 Jun18 ? 00:00:30 flowd: net root 27114 1 0 12:40 ? 00:00:00 NMIS opflowd debug=0 root 32567 27106 0 12:51 pts/5 00:00:00 grep flowd
The first two, flowd: are the Netflow daemon receiving flows, the NMIS one is the NMIS opflowd.
2a. If flowd is not running you can start it with the command:
service flowd start
Then repeat the ps -ef command, if it is not running you can check the syslog messages for why:
tail -50 /var/log/messages
Likely causes are full disks or permissions, or folders not existing.
2b. if opflowd is not running you can start it
Start it with the command below
service opflowd start
3. Verify that Mongo is running
[root@thor log]# ps -ef | grep mongo root 4462 27106 0 12:59 pts/5 00:00:00 grep mongo root 24809 1 0 Jun19 ? 04:26:07 /usr/local/mongodb/bin/mongod --dbpath /var/mongodb --fork --logpath /var/log/mongodb.log --logappend
Start it with the command below
service mongod start