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Add support for failover states in opencas.conf

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Signed-off-by: Jan Musial <jan.musial@intel.com>
This commit is contained in:
Jan Musial 2022-02-08 11:14:04 +01:00
parent a187813d13
commit fa167c267f
1 changed files with 41 additions and 7 deletions
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48
utils/opencas.py
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@ -60,8 +60,9 @@ class casadm:
return cls.run_cmd(cmd) return cls.run_cmd(cmd)
@classmethod @classmethod
def start_cache(cls, device, cache_id=None, cache_mode=None, def start_cache(
cache_line_size=None, load=False, force=False): cls, device, cache_id=None, cache_mode=None, cache_line_size=None, load=False, force=False
):
cmd = [cls.casadm_path, cmd = [cls.casadm_path,
'--start-cache', '--start-cache',
'--cache-device', device] '--cache-device', device]
@ -77,6 +78,22 @@ class casadm:
cmd += ['--force'] cmd += ['--force']
return cls.run_cmd(cmd) return cls.run_cmd(cmd)
@classmethod
def start_standby_cache(
cls, device, cache_id=None, cache_line_size=None, load=False, force=False
):
cmd = [cls.casadm_path,
'--standby',
'--init' if not load else '--load',
'--cache-device', device]
if cache_id:
cmd += ['--cache-id', str(cache_id)]
if cache_line_size:
cmd += ['--cache-line-size', str(cache_line_size)]
if force:
cmd += ['--force']
return cls.run_cmd(cmd)
@classmethod @classmethod
def add_core(cls, device, cache_id, core_id=None, try_add=False): def add_core(cls, device, cache_id, core_id=None, try_add=False):
cmd = [cls.casadm_path, cmd = [cls.casadm_path,
@ -250,6 +267,8 @@ class cas_config(object):
self.check_cache_line_size_valid(param_value) self.check_cache_line_size_valid(param_value)
elif param_name == "lazy_startup": elif param_name == "lazy_startup":
self.check_lazy_startup_valid(param_value) self.check_lazy_startup_valid(param_value)
elif param_name == "target_failover_state":
self.check_failover_state_valid(param_value)
else: else:
raise ValueError(f'{param_name} is invalid parameter name') raise ValueError(f'{param_name} is invalid parameter name')
@ -284,6 +303,10 @@ class cas_config(object):
if lazy_startup not in ["true", "false"]: if lazy_startup not in ["true", "false"]:
raise ValueError('{0} is invalid lazy_startup value'.format(lazy_startup)) raise ValueError('{0} is invalid lazy_startup value'.format(lazy_startup))
def check_failover_state_valid(self, failover_state):
if failover_state not in ["active", "standby"]:
raise ValueError(f"{failover_state} is invalid target_failover_state value")
def check_promotion_policy_valid(self, promotion_policy): def check_promotion_policy_valid(self, promotion_policy):
if promotion_policy not in ['always', 'nhit']: if promotion_policy not in ['always', 'nhit']:
raise ValueError(f'{promotion_policy} is invalid promotion policy name') raise ValueError(f'{promotion_policy} is invalid promotion policy name')
@ -545,13 +568,24 @@ class cas_config(object):
def start_cache(cache, load, force=False): def start_cache(cache, load, force=False):
casadm.start_cache( target_state = cache.params.get("target_failover_state")
if target_state is not None and target_state == "standby":
casadm.start_standby_cache(
device=cache.device, device=cache.device,
cache_id=cache.cache_id, cache_id=cache.cache_id if not load else None,
cache_mode=cache.cache_mode, cache_line_size=cache.params.get("cache_line_size") if not load else None,
cache_line_size=cache.params.get('cache_line_size'),
load=load, load=load,
force=force) force=force
)
else:
casadm.start_cache(
device=cache.device,
cache_id=cache.cache_id if not load else None,
cache_mode=cache.cache_mode if not load else None,
cache_line_size=cache.params.get('cache_line_size') if not load else None,
load=load,
force=force
)
def configure_cache(cache): def configure_cache(cache):