def process_snapd_timer():
"""
Set the snapd refresh timer on the leader so all cluster members
(present and future) will refresh near the same time.
:return: None
"""
# Get the current snapd refresh timer; we know layer-snap has set this
# when the 'snap.refresh.set' flag is present.
timer = snap.get(snapname="core",
key="refresh.timer").decode("utf-8").strip()
if not timer:
# The core snap timer is empty. This likely means a subordinate timer
# reset ours. Try to set it back to a previously leader-set value,
# falling back to config if needed. Luckily, this should only happen
# during subordinate install, so this should remain stable afterward.
timer = leader_get("snapd_refresh") or hookenv.config("snapd_refresh")
snap.set_refresh_timer(timer)
# Ensure we have the timer known by snapd (it may differ from config).
timer = snap.get(snapname="core",
key="refresh.timer").decode("utf-8").strip()
# The first time through, data_changed will be true. Subsequent calls
# should only update leader data if something changed.
if data_changed("snapd_refresh", timer):
hookenv.log("setting leader snapd_refresh timer to: {}".format(timer))
leader_set({"snapd_refresh": timer})
def set_snapd_timer():
''' Set the snapd refresh.timer on non-leader cluster members. '''
# NB: This method should only be run when 'snap.refresh.set' is present.
# Layer-snap will always set a core refresh.timer, which may not be the
# same as our leader. Gating with 'snap.refresh.set' ensures layer-snap
# has finished and we are free to set our config to the leader's timer.
timer = leader_get('snapd_refresh') or '' # None will cause error
log('setting snapd_refresh timer to: {}'.format(timer))
snap.set_refresh_timer(timer)
def change_snapd_refresh():
"""Set the system refresh.timer option"""
ensure_snapd_min_version("2.31")
timer = hookenv.config()["snapd_refresh"]
was_set = reactive.is_flag_set("snap.refresh.was-set")
if timer or was_set:
snap.set_refresh_timer(timer)
reactive.toggle_flag("snap.refresh.was-set", timer)
reactive.set_flag("snap.refresh.set")
def set_snapd_timer():
"""
Set the snapd refresh.timer on non-leader cluster members.
:return: None
"""
# NB: This method should only be run when 'snap.refresh.set' is present.
# Layer-snap will always set a core refresh.timer, which may not be the
# same as our leader. Gating with 'snap.refresh.set' ensures layer-snap
# has finished and we are free to set our config to the leader's timer.
timer = leader_get("snapd_refresh") or "" # None will error
hookenv.log("setting snapd_refresh timer to: {}".format(timer))
snap.set_refresh_timer(timer)
def process_snapd_timer():
''' Set the snapd refresh timer on the leader so all cluster members
(present and future) will refresh near the same time. '''
# Get the current snapd refresh timer; we know layer-snap has set this
# when the 'snap.refresh.set' flag is present.
timer = snap.get(snapname='core', key='refresh.timer').decode('utf-8')
if not timer:
# A subordinate wiped out our value, so we need to force it to be set
# again. Luckily, the subordinate should only wipe it out once, on
# first install, so this should remain stable afterward.
snap.set_refresh_timer(hookenv.config('snapd_refresh'))
timer = snap.get(snapname='core', key='refresh.timer').decode('utf-8')
# The first time through, data_changed will be true. Subsequent calls
# should only update leader data if something changed.
if data_changed('snapd_refresh', timer):
hookenv.log('setting leader snapd_refresh timer to: {}'.format(timer))
leadership.leader_set({'snapd_refresh': timer})
def change_snapd_refresh():
"""Set the system refresh.timer option"""
ensure_snapd_min_version('2.31')
timer = hookenv.config()['snapd_refresh']
snap.set_refresh_timer(timer)
reactive.set_flag('snap.refresh.set')
