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NetFlow data can get away on you, there could be several Gigabytes of NetFlow data each hour, day or month, this is all very dependant on where you are generating netflow from, the number of active users and the types of applications they are using. A longer discussion on this will be written up, but in summary, if you are expecting large amounts of NetFlow data, then you will want to consider storing the MongoDB database and the NetFlow data into a filesystem with 50 gigabytes or more. During development we found 20gigabytes 20 gigabytes was enough for our purposes, but caused problems with the flow files mainly. If you are using the Opmantek NMIS8 Virtual Machine please check out our instructions on Resizing NMIS VMs.
opFlow is highly configurable and customisable, so it is easy to just have the flowd data be a seperate filesystem and update the configuration accordingly.
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When trying to add the _flowd user, you will get the following error message:
adduser: Please enter a username matching the regular expression configured
via the NAME_REGEX[_SYSTEM] configuration variable. Use the `--force-badname'
option to relax this check or reconfigure NAME_REGEX.
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adduser --force _flowd |
Debian/Ubuntu follow the LSB (Linux Standard Base) specification, init script functions be available at /lib/lsb/init-functions.
Edit /etc/init.d/flowd
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#change this line: . /etc/init.d/functions #to this: . /lib/lsb/init-functions |
The start flowd
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sysv-rc-conf flowd on service flowd start |
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cp /usr/local/opmantek/install/mongod.init.d /etc/init.d/mongod chkconfig mongod on service mongod start |
Debian/Ubuntu
Edit /etc/init.d/mongod
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#change this line: . /etc/init.d/functions #to this: . /lib/lsb/init-functions |
The start mongod
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sysv-rc-conf mongod on service mongod start |
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cp /usr/local/opmantek/install/opflowd.init.d /etc/init.d/opflowd chkconfig opflowd on service opflowd start |
Debian/Ubuntu
Edit /etc/init.d/opflowd
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#change this line: . /etc/init.d/functions #to this: . /lib/lsb/init-functions |
The start opflowd
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sysv-rc-conf opflowd on service opflowd start |
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/usr/local/opmantek/bin/opupdateconfig.pl /usr/local/opmantek/install/opFlow.nmis /usr/local/opmantek/conf/opFlow.nmis /usr/local/opmantek/bin/opupdateconfig.pl /usr/local/opmantek/install/opCommon.nmis /usr/local/opmantek/conf/opCommon.nmis cp /usr/local/opmantek/install/mongod.init.d /etc/init.d/mongod /usr/local/opmantek/bin/opflow_setup.pl setup=all |
Debian/Ubuntu
Verify/Edit /etc/init.d/flowd, /etc/init.d/mongod and /etc/init.d/opflowd
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#change this line: . /etc/init.d/functions #to this: . /lib/lsb/init-functions |