vm foo.bar is active with 32mb
add_policy bar --mem 16 <- failed :/
what is checked on add_policy <id> <new-policy>?
- all policies above <id> that <new policy> is a sub-policy
- all policies below <id> that each is a sub-policy of <new-policy>
- resource usage of vms below <id> is within <new-policy> limits (number of vms, memory, network access, cpuids)
- Vmm_console/log/stats do not read multiple times
console_add loops
console_subscribe terminates (a stream of messages is sent)
log data stream loops
log_subscribe terminates (a stream of data is sent)
stat_add loops
stat_remove loops
stat_subscribe terminates (a stream of stats is sent)
terminates means: reads once more, and closes socket after second read returned
loop processes further incoming data
vmmc now has more subcommands
- policy [-n name] returns all policies in name and below
- add_policy [-n name] [--cpu cpuid] [--mem mem] [--bridge bridge] [--block size] adds a policy
- remove [-n name] removes policy at name
policy is just the same which is in vmm_req_delegation, and vmm_resources now check them:
- you cannot insert a subpolicy violating the prefix
- you cannot insert a policy which would forbid current resource usage
- you cannot insert a policy with which any subpolicy would be invalid
- you can adjust (increase/decrease) a policy if the above invariants are kept
implement "force create" directly in vmmd: much nicer to
- check resource constraints,
- kill vm potentially,
- and create a new vm,
all as single transaction.
