OpenStack启动虚拟机、虚拟机做快照加速

rtre

虚拟机做快照加速：

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[iyunv@controller-39 ~]# vim /usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py cfg.StrOpt('snapshots_directory',                default='$instances_path/snapshots',                help='Location where libvirt driver will store snapshots '                     'before uploading them to image service'), CONF = cfg.CONF CONF.register_opts(libvirt_opts, 'libvirt') # 可以看出nova.conf中可以配置虚拟机做快照(默认全量快照)，快照上传到glance之前的过渡目录(比如：配置在ssd盘上)。

启动虚拟机加速：

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# openstack第一次启动虚拟机的时候会从glance拉镜像到本地(默认是$instances_path/_base) # 第二次以同样的镜像启动虚拟机的时候就直接从$image_cache_directory_name/_base启动了 # 同样，如果base目录是ssd的话，启动虚拟机快是理所应当的。 # 下面的patch就是把虚拟机的base目录变成一个nova.conf的配置选项。 --- virt/imagecache.py           |    4 ++++ virt/libvirt/imagebackend.py |    3 ++- virt/libvirt/imagecache.py   |    3 ++- 3 files changed, 8 insertions(+), 2 deletions(-) diff --git a/virt/imagecache.py b/virt/imagecache.py index b63013f..593a48e 100644 --- a/virt/imagecache.py +++ b/virt/imagecache.py @@ -29,6 +29,10 @@ imagecache_opts = [                      'This is NOT the full path - just a folder name. '                      'For per-compute-host cached images, set to _base_$my_ip',                 deprecated_name='base_dir_name'), +    cfg.StrOpt('image_cache_directory_name', +               default='/var/lib/nova/instances', +               help='Where cached images are stored under cache directory. ', +               deprecated_name='base_dir'),      cfg.BoolOpt('remove_unused_base_images',                  default=True,                  help='Should unused base images be removed?', diff --git a/virt/libvirt/imagebackend.py b/virt/libvirt/imagebackend.py index 6511496..8c0b887 100644 --- a/virt/libvirt/imagebackend.py +++ b/virt/libvirt/imagebackend.py @@ -84,6 +84,7 @@ __imagebackend_opts = [ CONF = cfg.CONF CONF.register_opts(__imagebackend_opts, 'libvirt') CONF.import_opt('image_cache_subdirectory_name', 'nova.virt.imagecache') +CONF.import_opt('image_cache_directory_name', 'nova.virt.imagecache') CONF.import_opt('preallocate_images', 'nova.virt.driver')    LOG = logging.getLogger(__name__) @@ -181,7 +182,7 @@ class Image(object):          def fetch_func_sync(target, *args, **kwargs):              fetch_func(target=target, *args, **kwargs)    -        base_dir = os.path.join(CONF.instances_path, +        base_dir = os.path.join(CONF.image_cache_directory_name,                                  CONF.image_cache_subdirectory_name)          if not os.path.exists(base_dir):              fileutils.ensure_tree(base_dir) diff --git a/virt/libvirt/imagecache.py b/virt/libvirt/imagecache.py index 5320bad..e1453de 100644 --- a/virt/libvirt/imagecache.py +++ b/virt/libvirt/imagecache.py @@ -72,6 +72,7 @@ CONF = cfg.CONF CONF.register_opts(imagecache_opts, 'libvirt') CONF.import_opt('instances_path', 'nova.compute.manager') CONF.import_opt('image_cache_subdirectory_name', 'nova.virt.imagecache') +CONF.import_opt('image_cache_directory_name', 'nova.virt.imagecache')    def get_cache_fname(images, key): @@ -578,7 +579,7 @@ class ImageCacheManager(imagecache.ImageCacheManager):          # cache to the instance directory. Files ending in _sm are no longer          # created, but may remain from previous versions.    -        base_dir = os.path.join(CONF.instances_path, +        base_dir = os.path.join(CONF.image_cache_directory_name,                                  CONF.image_cache_subdirectory_name)          if not os.path.exists(base_dir):              LOG.debug(_('Skipping verification, no base directory at %s'), --