diff options
Diffstat (limited to 'nova/conf/libvirt.py')
| -rw-r--r-- | nova/conf/libvirt.py | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/nova/conf/libvirt.py b/nova/conf/libvirt.py index 199cc6cf5e..204fe5c4b8 100644 --- a/nova/conf/libvirt.py +++ b/nova/conf/libvirt.py @@ -321,13 +321,14 @@ Please refer to the libvirt documentation for further details. default=500, min=100, help=""" -Maximum permitted downtime, in milliseconds, for live migration -switchover. +Target maximum period of time Nova will try to keep the instance paused +during the last part of the memory copy, in *milliseconds*. Will be rounded up to a minimum of 100ms. You can increase this value if you want to allow live-migrations to complete faster, or avoid live-migration timeout errors by allowing the guest to be paused for -longer during the live-migration switch over. +longer during the live-migration switch over. This value may be exceeded +if there is any reduction on the transfer rate after the VM is paused. Related options: @@ -452,7 +453,7 @@ support built into QEMU. Prerequisite: TLS environment is configured correctly on all relevant Compute nodes. This means, Certificate Authority (CA), server, client -certificates, their corresponding keys, and their file permisssions are +certificates, their corresponding keys, and their file permissions are in place, and are validated. Notes: @@ -704,7 +705,7 @@ the source of entropy on the host. Since libvirt 1.3.4, any path (that returns random numbers when read) is accepted. The recommended source of entropy is ``/dev/urandom`` -- it is non-blocking, therefore relatively fast; and avoids the limitations of ``/dev/random``, which is -a legacy interface. For more details (and comparision between different +a legacy interface. For more details (and comparison between different RNG sources), refer to the "Usage" section in the Linux kernel API documentation for ``[u]random``: http://man7.org/linux/man-pages/man4/urandom.4.html and @@ -986,6 +987,7 @@ slowly to be useful. Actual errors will be reported by Glance and noticed according to the poll interval. Related options: + * images_type - must be set to ``rbd`` * images_rbd_glance_store_name - must be set to a store name * images_rbd_glance_copy_poll_interval - controls the failure time-to-notice @@ -1476,6 +1478,23 @@ Related options: """), ] +libvirt_cpu_mgmt_opts = [ + cfg.BoolOpt('cpu_power_management', + default=False, + help='Use libvirt to manage CPU cores performance.'), + cfg.StrOpt('cpu_power_management_strategy', + choices=['cpu_state', 'governor'], + default='cpu_state', + help='Tuning strategy to reduce CPU power consumption when ' + 'unused'), + cfg.StrOpt('cpu_power_governor_low', + default='powersave', + help='Governor to use in order ' + 'to reduce CPU power consumption'), + cfg.StrOpt('cpu_power_governor_high', + default='performance', + help='Governor to use in order to have best CPU performance'), +] ALL_OPTS = list(itertools.chain( libvirt_general_opts, @@ -1497,6 +1516,7 @@ ALL_OPTS = list(itertools.chain( libvirt_volume_nvmeof_opts, libvirt_pmem_opts, libvirt_vtpm_opts, + libvirt_cpu_mgmt_opts, )) |