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# -*- coding: utf-8 -*-
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import datetime
import os
import tempfile
import distutils
import time
import shutil
import subprocess
import sys
import unittest
from influxdb.tests.misc import is_port_open, get_free_ports
# hack in check_output if it's not defined, like for python 2.6
if "check_output" not in dir(subprocess):
def f(*popenargs, **kwargs):
if 'stdout' in kwargs:
raise ValueError(
'stdout argument not allowed, it will be overridden.'
)
process = subprocess.Popen(stdout=subprocess.PIPE,
*popenargs,
**kwargs)
output, unused_err = process.communicate()
retcode = process.poll()
if retcode:
cmd = kwargs.get("args")
if cmd is None:
cmd = popenargs[0]
raise subprocess.CalledProcessError(retcode, cmd)
return output
subprocess.check_output = f
class InfluxDbInstance(object):
""" A class to launch of fresh influxdb server instance
in a temporary place, using a config file template.
"""
def __init__(self,
conf_template,
udp_enabled=False):
if os.environ.get("INFLUXDB_PYTHON_SKIP_SERVER_TESTS", None) == 'True':
raise unittest.SkipTest(
"Skipping server test (INFLUXDB_PYTHON_SKIP_SERVER_TESTS)"
)
self.influxd_path = self.find_influxd_path()
errors = 0
while True:
try:
self._start_server(conf_template, udp_enabled)
break
# Happens when the ports are already in use.
except RuntimeError as e:
errors += 1
if errors > 2:
raise e
def _start_server(self, conf_template, udp_enabled):
# create a temporary dir to store all needed files
# for the influxdb server instance :
self.temp_dir_base = tempfile.mkdtemp()
# "temp_dir_base" will be used for conf file and logs,
# while "temp_dir_influxdb" is for the databases files/dirs :
tempdir = self.temp_dir_influxdb = tempfile.mkdtemp(
dir=self.temp_dir_base)
# find a couple free ports :
free_ports = get_free_ports(4)
ports = {}
for service in 'http', 'admin', 'meta', 'udp':
ports[service + '_port'] = free_ports.pop()
if not udp_enabled:
ports['udp_port'] = -1
conf_data = dict(
meta_dir=os.path.join(tempdir, 'meta'),
data_dir=os.path.join(tempdir, 'data'),
wal_dir=os.path.join(tempdir, 'wal'),
cluster_dir=os.path.join(tempdir, 'state'),
handoff_dir=os.path.join(tempdir, 'handoff'),
logs_file=os.path.join(self.temp_dir_base, 'logs.txt'),
udp_enabled='true' if udp_enabled else 'false',
)
conf_data.update(ports)
self.__dict__.update(conf_data)
conf_file = os.path.join(self.temp_dir_base, 'influxdb.conf')
with open(conf_file, "w") as fh:
with open(conf_template) as fh_template:
fh.write(fh_template.read().format(**conf_data))
# now start the server instance:
self.proc = subprocess.Popen(
[self.influxd_path, '-config', conf_file],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE
)
print(
"%s > Started influxdb bin in %r with ports %s and %s.." % (
datetime.datetime.now(),
self.temp_dir_base,
self.admin_port,
self.http_port
)
)
# wait for it to listen on the broker and admin ports:
# usually a fresh instance is ready in less than 1 sec ..
timeout = time.time() + 10 # so 10 secs should be enough,
# otherwise either your system load is high,
# or you run a 286 @ 1Mhz ?
try:
while time.time() < timeout:
if (is_port_open(self.http_port) and
is_port_open(self.admin_port)):
# it's hard to check if a UDP port is open..
if udp_enabled:
# so let's just sleep 0.5 sec in this case
# to be sure that the server has open the port
time.sleep(0.5)
break
time.sleep(0.5)
if self.proc.poll() is not None:
raise RuntimeError('influxdb prematurely exited')
else:
self.proc.terminate()
self.proc.wait()
raise RuntimeError('Timeout waiting for influxdb to listen'
' on its ports (%s)' % ports)
except RuntimeError as err:
data = self.get_logs_and_output()
data['reason'] = str(err)
data['now'] = datetime.datetime.now()
raise RuntimeError("%(now)s > %(reason)s. RC=%(rc)s\n"
"stdout=%(out)s\nstderr=%(err)s\nlogs=%(logs)r"
% data)
def find_influxd_path(self):
influxdb_bin_path = os.environ.get(
'INFLUXDB_PYTHON_INFLUXD_PATH',
None
)
if influxdb_bin_path is None:
influxdb_bin_path = distutils.spawn.find_executable('influxd')
if not influxdb_bin_path:
try:
influxdb_bin_path = subprocess.check_output(
['which', 'influxd']
).strip()
except subprocess.CalledProcessError:
# fallback on :
influxdb_bin_path = '/opt/influxdb/influxd'
if not os.path.isfile(influxdb_bin_path):
raise unittest.SkipTest("Could not find influxd binary")
version = subprocess.check_output([influxdb_bin_path, 'version'])
print("InfluxDB version: %s" % version, file=sys.stderr)
return influxdb_bin_path
def get_logs_and_output(self):
proc = self.proc
try:
with open(self.logs_file) as fh:
logs = fh.read()
except IOError as err:
logs = "Couldn't read logs: %s" % err
return {
'rc': proc.returncode,
'out': proc.stdout.read(),
'err': proc.stderr.read(),
'logs': logs
}
def close(self, remove_tree=True):
self.proc.terminate()
self.proc.wait()
if remove_tree:
shutil.rmtree(self.temp_dir_base)
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