django-orchestra/orchestra/contrib/orchestration/utils.py

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from orchestra.utils.sys import run, sshrun, join
def retrieve_state(servers):
uptimes = []
pings = []
for server in servers:
address = server.get_address()
ping = run('ping -c 1 -w 1 %s' % address, run_async=True)
pings.append(ping)
uptime = sshrun(address, 'uptime', persist=True, run_async=True, options={'ConnectTimeout': 1})
uptimes.append(uptime)
state = {}
for server, ping, uptime in zip(servers, pings, uptimes):
ping = join(ping, silent=True)
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try:
ping = ping.stdout.splitlines()[-1].decode()
except IndexError:
ping = ''
if ping.startswith('rtt'):
ping = '%s ms' % ping.split('/')[4]
else:
ping = '<span style="color:red">Offline</span>'
uptime = join(uptime, silent=True)
uptime_stderr = uptime.stderr.decode()
uptime = uptime.stdout.decode().split()
if uptime:
uptime = 'Up %s %s load %s %s %s' % (uptime[2], uptime[3], uptime[-3], uptime[-2], uptime[-1])
else:
uptime = '<span style="color:red">%s</span>' % uptime_stderr
state[server.pk] = (ping, uptime)
return state