def handle_create_cache_tier(request, service):
"""Create a cache tier on a cold pool. Modes supported are
"writeback" and "readonly".
:param request: dict of request operations and params
:param service: The ceph client to run the command under.
:returns: dict. exit-code and reason if not 0
"""
# mode = "writeback" | "readonly"
storage_pool = request.get('cold-pool')
cache_pool = request.get('hot-pool')
cache_mode = request.get('mode')
if cache_mode is None:
cache_mode = "writeback"
# cache and storage pool must exist first
if not pool_exists(service=service, name=storage_pool) or not pool_exists(
service=service, name=cache_pool):
msg = ("cold-pool: {} and hot-pool: {} must exist. Please create "
"them first".format(storage_pool, cache_pool))
log(msg, level=ERROR)
return {'exit-code': 1, 'stderr': msg}
p = BasePool(service=service, name=storage_pool)
p.add_cache_tier(cache_pool=cache_pool, mode=cache_mode)
def handle_remove_cache_tier(request, service):
"""Remove a cache tier from the cold pool.
:param request: dict of request operations and params
:param service: The ceph client to run the command under.
:returns: dict. exit-code and reason if not 0
"""
storage_pool = request.get('cold-pool')
cache_pool = request.get('hot-pool')
# cache and storage pool must exist first
if not pool_exists(service=service, name=storage_pool) or not pool_exists(
service=service, name=cache_pool):
msg = ("cold-pool: {} or hot-pool: {} doesn't exist. Not "
"deleting cache tier".format(storage_pool, cache_pool))
log(msg, level=ERROR)
return {'exit-code': 1, 'stderr': msg}
pool = BasePool(name=storage_pool, service=service)
pool.remove_cache_tier(cache_pool=cache_pool)