def _flush_all(self):
now = unix_time(datetime.utcnow())
containers = self.containers.copy()
for cid,c in list(containers.items()):
c.flush()
if now - c.last_read > self.maint_interval:
c.delete()
del self.containers[cid]
log.debug('cleared stale container %s' % cid)
def _get_container(self, key):
"""
Fetch all fields in a hash key from redis, mapping to types defined
in self.keys. Return None if any keys are missing or last update
was > 10s ago.
"""
now = unix_time(datetime.utcnow())
container = self.redis.hgetall(key)
if False in [k in container for k in self.keys]:
return None
stat = { k:convert_type(container[k],t) for \
k,t in list(self.keys.items()) }
if now - stat['last_read'] > 10:
return None
return stat
def append_stat(self, stat):
self.last_read = unix_time(stat.timestamp)
self.current["name"] = stat.name
self.current["source"] = stat.source
self.current["last_read"] = self.last_read
if len(self.stats) > 0:
last_stat = self.stats[-1]
self.current["cpu"] = self._calculate_cpu(stat, last_stat)
self.current["mem"] = float(stat.memory_stats.usage)
self.current["net_tx_bytes_total"] = float(stat.network.tx_bytes)
self.current["net_rx_bytes_total"] = float(stat.network.rx_bytes)
read_io, write_io = self._get_rw_io(stat)
self.current["io_read_bytes_total"] = read_io
self.current["io_write_bytes_total"] = write_io
self.redis.hincrby(self.key, "stats_read", amount=1)
self.redis.hmset(self.key, self.current)
self.stats.append(stat)
