[pve-devel] [PATCH-SERIES common/qemu-server/lxc/manager] brodcast new metric stats in kvstore

Alexandre Derumier aderumier at odiso.com
Wed Jun 1 10:12:43 CEST 2022


Hi,

I'm still working on vm balancing/scheduling, and need some new metrics.

As suggested by Thomas, instead sending values to new rrd,
and then reparse rrd later in balancer, we broadcast:

- last minute && last 5 min average cpu/ram of qemu/lxc/node
- pressure average of cpu/mem/io for qemu/lxc/node

Theses values are broadcast each minute in 1 kvstore key "balancer-stats"

Size of broadcasted "balancer-stats" is around : 500bytes * number vms.

Size of in memory hash for average values is around : 6k (host+mem) * number vms.
(for last minute, we keep each X seconds iteration, for last 5min we keep last 5x1min average)


- last ksm value
This value is broadcast each iteration is a separate kvstore key "ksm"



pve-common:

Alexandre Derumier (2):
  cgroup: get_pressure_stat: use controllers in get_path
  cgroup: get_pressure_stat: add cpu full pressure

 src/PVE/CGroup.pm | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

qemu-server:

Alexandre Derumier (3):
  vmstatus: add hostcpu value
  vmstatus: add hostmem value
  vmstatus: add pressure stats

 PVE/QemuServer.pm | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

pve-container:

Alexandre Derumier (1):
  vmstatus: add pressure stats

 src/PVE/LXC.pm | 2 ++
 1 file changed, 2 insertions(+)

Alexandre Derumier (4):
  pvestatd: add broadcast_balancer_stats
  pvestatd: qemu/lxc/node : add pressure stats
  pvestatd: qemu/lxc/node : add hostcpu/hostmem average stats
  pvestatd: node : broadcast ksm value

 PVE/Service/pvestatd.pm | 154 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 153 insertions(+), 1 deletion(-)

-- 
2.30.2



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