def acquire(self):
if os.path.exists(self.lockfile):
lock_time = os.path.getmtime(self.lockfile)
# lock expires to avoid starvation
if time.time()-lock_time < self.expire:
return False
touch(self.lockfile)
return True
def acquire(self):
if os.path.exists(self.lockfile):
lock_time = os.path.getmtime(self.lockfile)
# lock expires to avoid starvation
if time.time()-lock_time < self.expire:
return False
touch(self.lockfile)
return True
def update_tincd():
"""
Generates all local tinc/hosts/* and reloads tincd
"""
from .models import TincHost
hosts_path = '%s/hosts/' % os.path.join(TINC_TINCD_ROOT, TINC_NET_NAME)
# Dirty mechanism to know if there has been any change while running
dirtyfile = os.path.join(hosts_path, '.dirty')
now = time.time()
touch(dirtyfile, times=(now, now))
# File-based lock mechanism to prevent concurrency problems
with LockFile(hosts_path+'.lock', expire=60):
hosts = TincHost.objects.hosts() # clients + gateways
# Batch processing of tinc clients for efficiency/max_arg_length tradeoff
scripts = []
total = len(hosts)
for start in range(0, total, 100):
end = min(start + 100, total)
script = ''
for host in hosts[start:end]:
host_file = os.path.join(hosts_path, host.name)
script += 'echo -e "%s" > %s;\n' % (host.get_host(), host_file)
scripts.append(script)
# delete all tinc hosts
run('rm -f -- %s{host_,node_}*' % hosts_path)
# create all tinc hosts
for script in scripts:
run(script)
# retry if there is any pending modification
if os.path.getmtime(dirtyfile) > now:
raise update_tincd.retry(countdown=1)
# In some systems it is mandatory to send a HUP signal in order to reload new subnets
if TINC_TINCD_SEND_HUP:
context = {
'tincd_bin': TINC_TINCD_BIN,
'net_name': TINC_NET_NAME
}
tinc_hup = "sudo %(tincd_bin)s -kHUP -n %(net_name)s" % context
run(tinc_hup)
def update_tincd():
"""
Generates all local tinc/hosts/* and reloads tincd
"""
from .models import TincHost
hosts_path = '%s/hosts/' % os.path.join(TINC_TINCD_ROOT, TINC_NET_NAME)
# Dirty mechanism to know if there has been any change while running
dirtyfile = os.path.join(hosts_path, '.dirty')
now = time.time()
touch(dirtyfile, times=(now, now))
# File-based lock mechanism to prevent concurrency problems
with LockFile(hosts_path + '.lock', expire=60):
hosts = TincHost.objects.hosts() # clients + gateways
# Batch processing of tinc clients for efficiency/max_arg_length tradeoff
scripts = []
total = len(hosts)
for start in range(0, total, 100):
end = min(start + 100, total)
script = ''
for host in hosts[start:end]:
host_file = os.path.join(hosts_path, host.name)
script += 'echo -e "%s" > %s;\n' % (host.get_host(), host_file)
scripts.append(script)
# delete all tinc hosts
run('rm -f -- %s{host_,node_}*' % hosts_path)
# create all tinc hosts
for script in scripts:
run(script)
# retry if there is any pending modification
if os.path.getmtime(dirtyfile) > now:
raise update_tincd.retry(countdown=1)
# In some systems it is mandatory to send a HUP signal in order to reload new subnets
if TINC_TINCD_SEND_HUP:
context = {'tincd_bin': TINC_TINCD_BIN, 'net_name': TINC_NET_NAME}
tinc_hup = "sudo %(tincd_bin)s -kHUP -n %(net_name)s" % context
run(tinc_hup)