Make it easier to separate the model (i.e. API endpoints) from the
controller (i.e. the actual functions which talk to ZK). Helps to keep
the main API file smaller and more regular.
This is the largest of the function files, and unlike the others is
cleanly split into four types. Reorganize the file and function
definitions around those types to make it easier to navigate, and do so
separately before refactoring for API.
Don't try to queue up a flush when there is already a flush lock; direct
the user to use --wait (which will actually wait before triggering the
new action), or try again later.
This was very old code that was hard to follow and quite fragile, with
failures and infinite loops occurring fairly frequently. These changes
make the code more robust, including the addition of timeouts, some code
cleanup, and some improvements to the logical flow.
Also forces the libvirt migration to occur on the cluster network, which
couples to changes in the libvirtd listen (via pvc-ansible) and in
Daemon.py via the previous commit.
Reference: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=717215#68
Without this, DHCP fails when traversing only the local bridge, for
Debian Jessie or earlier (and possibly other OSes as well), due to the
missing UDP checksums. This disables the offload and hence reenables
the checksums even on the software-only bridge.
Also rearranged the steps and added comments arround this section to
better clarify what each command is doing.
There was really no need for this to be shared among all the
coordinators, which seemed more fragile. This way only the primary will
try to fence dead nodes.
