Tested on a XenServer by running "kill -SEGV" on the daemon processes and
watching them restart automatically and by running plain "kill" and
watching them terminate normally.
Unloading kernel modules will destroy all of the datapaths, which is a
drastic action. So we are probably better off doing that only if the
user requests it explicitly.
This appears to work in that it creates the database on installation,
starts and stops the programs and loads and unloads the kernel modules at
the right times, but it has not been tested beyond that.
This implements the kernel portion of GRE on Linux. It consists
of a backported module that provides the GRE capabilities of 2.6.32
plus bug fixes to kernels 2.6.18+.
Until now, setting a netflow collector to a DNS name would cause
secchan to attempt to resolve that DNS name each time that the set of
netflow collectors is re-set. For the vswitch, this is every time that
the vswitch reconfigures itself.
Unfortunately, DNS lookup within secchan cannot work as currently
implemented, because it needs both an asynchronous DNS resolver library
and in-band control updates. Currently we have neither. Attempting to
look up DNS anyway just hangs.
This commit disables DNS lookup entirely, and updates the documentation to
change user expectations. DNS still won't work, but at least it won't
hang.
Bug #1609.
