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.
Prevents returning immediately to give the cluster some breathing
room before the admin can do other commands. Keep the write lock
as well to prevent other clients from attempting this as well.
Showing the static, total number of CPUs was pointless. Instead,
show the number of allocated vCPUs. To preserve space, no longer
show the host CPU count in the list.
Implements a locking mechanism to prevent clobbering of node
flushes. When a flush begins, a global cluster lock is placed
which is freed once the flush completes. While the lock is in place,
other flush events queue waiting for the lock to free before
proceeding.
Modifies the CLI output flow when the `--wait` option is specified.
First, if a lock exists when running the command, the message is
tweaked to indicate this, and the client will wait first for the
lock to free, and then for the flush as normal. Second, the wait
depends on the active lock rather than the domain_status for
consistency purposes.
Closes#32
