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Move the process metrics collector code into its own file

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This commit is contained in:
Paul "LeoNerd" Evans 2016-10-19 18:10:24 +01:00
parent 4cedd53224
commit 3ae48a1f99
3 changed files with 161 additions and 141 deletions
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2
synapse/app/homeserver.py
View File

@ -52,6 +52,7 @@ from synapse.config.homeserver import HomeServerConfig
from synapse.crypto import context_factory
from synapse.util.logcontext import LoggingContext
from synapse.metrics import register_memory_metrics, get_metrics_for
from synapse.metrics.process_collector import register_process_collector
from synapse.metrics.resource import MetricsResource, METRICS_PREFIX
from synapse.replication.resource import ReplicationResource, REPLICATION_PREFIX
from synapse.federation.transport.server import TransportLayerServer
@ -337,6 +338,7 @@ def setup(config_options):
hs.get_replication_layer().start_get_pdu_cache()
register_memory_metrics(hs)
register_process_collector()
reactor.callWhenRunning(start)

141
synapse/metrics/__init__.py
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@ -13,14 +13,8 @@
# See the License for the specific language governing permissions and
# limitations under the License.
# Because otherwise 'resource' collides with synapse.metrics.resource
from __future__ import absolute_import
import logging
from resource import getrusage, RUSAGE_SELF
import functools
import os
import stat
import time
import gc
@ -113,141 +107,6 @@ def render_all():
return "\n".join(strs)
# Now register some standard process-wide state metrics, to give indications of
# process resource usage
TICKS_PER_SEC = 100
BYTES_PER_PAGE = 4096
HAVE_PROC_STAT = os.path.exists("/proc/stat")
HAVE_PROC_SELF_STAT = os.path.exists("/proc/self/stat")
HAVE_PROC_SELF_LIMITS = os.path.exists("/proc/self/limits")
HAVE_PROC_SELF_FDS = os.path.exists("/proc/self/fds")
rusage = None
stats = None
fd_counts = None
# In order to report process_start_time_seconds we need to know the machine's
# boot time, because the value in /proc/self/stat is relative to this
boot_time = None
if HAVE_PROC_STAT:
with open("/proc/stat") as _procstat:
for line in _procstat:
if line.startswith("btime "):
boot_time = int(line.split()[1])
TYPES = {
stat.S_IFSOCK: "SOCK",
stat.S_IFLNK: "LNK",
stat.S_IFREG: "REG",
stat.S_IFBLK: "BLK",
stat.S_IFDIR: "DIR",
stat.S_IFCHR: "CHR",
stat.S_IFIFO: "FIFO",
}
def update_resource_metrics():
global rusage
rusage = getrusage(RUSAGE_SELF)
if HAVE_PROC_SELF_STAT:
global stats
with open("/proc/self/stat") as s:
line = s.read()
# line is PID (command) more stats go here ...
stats = line.split(") ", 1)[1].split(" ")
global fd_counts
fd_counts = _process_fds()
def _process_fds():
counts = {(k,): 0 for k in TYPES.values()}
counts[("other",)] = 0
# Not every OS will have a /proc/self/fd directory
if not HAVE_PROC_SELF_FDS:
return counts
for fd in os.listdir("/proc/self/fd"):
try:
s = os.stat("/proc/self/fd/%s" % (fd))
fmt = stat.S_IFMT(s.st_mode)
if fmt in TYPES:
t = TYPES[fmt]
else:
t = "other"
counts[(t,)] += 1
except OSError:
# the dirh itself used by listdir() is usually missing by now
pass
return counts
# Legacy synapse-invented metric names
resource_metrics = get_metrics_for("process.resource")
resource_metrics.register_collector(update_resource_metrics)
# msecs
resource_metrics.register_callback("utime", lambda: rusage.ru_utime * 1000)
resource_metrics.register_callback("stime", lambda: rusage.ru_stime * 1000)
# kilobytes
resource_metrics.register_callback("maxrss", lambda: rusage.ru_maxrss * 1024)
get_metrics_for("process").register_callback("fds", _process_fds, labels=["type"])
# New prometheus-standard metric names
process_metrics = get_metrics_for("process")
if HAVE_PROC_SELF_STAT:
process_metrics.register_callback(
"cpu_user_seconds_total", lambda: float(stats[11]) / TICKS_PER_SEC
)
process_metrics.register_callback(
"cpu_system_seconds_total", lambda: float(stats[12]) / TICKS_PER_SEC
)
process_metrics.register_callback(
"cpu_seconds_total", lambda: (float(stats[11]) + float(stats[12])) / TICKS_PER_SEC
)
process_metrics.register_callback(
"virtual_memory_bytes", lambda: int(stats[20])
)
process_metrics.register_callback(
"resident_memory_bytes", lambda: int(stats[21]) * BYTES_PER_PAGE
)
process_metrics.register_callback(
"start_time_seconds", lambda: boot_time + int(stats[19]) / TICKS_PER_SEC
)
if HAVE_PROC_SELF_FDS:
process_metrics.register_callback(
"open_fds", lambda: sum(fd_counts.values())
)
if HAVE_PROC_SELF_LIMITS:
def _get_max_fds():
with open("/proc/self/limits") as limits:
for line in limits:
if not line.startswith("Max open files "):
continue
# Line is Max open files $SOFT $HARD
return int(line.split()[3])
return None
process_metrics.register_callback(
"max_fds", lambda: _get_max_fds()
)
reactor_metrics = get_metrics_for("reactor")
tick_time = reactor_metrics.register_distribution("tick_time")
pending_calls_metric = reactor_metrics.register_distribution("pending_calls")

159
synapse/metrics/process_collector.py Normal file
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@ -0,0 +1,159 @@
# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Because otherwise 'resource' collides with synapse.metrics.resource
from __future__ import absolute_import
import os
import stat
from resource import getrusage, RUSAGE_SELF
from synapse.metrics import get_metrics_for
TICKS_PER_SEC = 100
BYTES_PER_PAGE = 4096
HAVE_PROC_STAT = os.path.exists("/proc/stat")
HAVE_PROC_SELF_STAT = os.path.exists("/proc/self/stat")
HAVE_PROC_SELF_LIMITS = os.path.exists("/proc/self/limits")
HAVE_PROC_SELF_FD = os.path.exists("/proc/self/fd")
TYPES = {
stat.S_IFSOCK: "SOCK",
stat.S_IFLNK: "LNK",
stat.S_IFREG: "REG",
stat.S_IFBLK: "BLK",
stat.S_IFDIR: "DIR",
stat.S_IFCHR: "CHR",
stat.S_IFIFO: "FIFO",
}
rusage = None
stats = None
fd_counts = None
# In order to report process_start_time_seconds we need to know the
# machine's boot time, because the value in /proc/self/stat is relative to
# this
boot_time = None
if HAVE_PROC_STAT:
with open("/proc/stat") as _procstat:
for line in _procstat:
if line.startswith("btime "):
boot_time = int(line.split()[1])
def update_resource_metrics():
global rusage
rusage = getrusage(RUSAGE_SELF)
if HAVE_PROC_SELF_STAT:
global stats
with open("/proc/self/stat") as s:
line = s.read()
# line is PID (command) more stats go here ...
stats = line.split(") ", 1)[1].split(" ")
global fd_counts
fd_counts = _process_fds()
def _process_fds():
counts = {(k,): 0 for k in TYPES.values()}
counts[("other",)] = 0
# Not every OS will have a /proc/self/fd directory
if not HAVE_PROC_SELF_FD:
return counts
for fd in os.listdir("/proc/self/fd"):
try:
s = os.stat("/proc/self/fd/%s" % (fd))
fmt = stat.S_IFMT(s.st_mode)
if fmt in TYPES:
t = TYPES[fmt]
else:
t = "other"
counts[(t,)] += 1
except OSError:
# the dirh itself used by listdir() is usually missing by now
pass
return counts
def register_process_collector():
# Legacy synapse-invented metric names
resource_metrics = get_metrics_for("process.resource")
resource_metrics.register_collector(update_resource_metrics)
# msecs
resource_metrics.register_callback("utime", lambda: rusage.ru_utime * 1000)
resource_metrics.register_callback("stime", lambda: rusage.ru_stime * 1000)
# kilobytes
resource_metrics.register_callback("maxrss", lambda: rusage.ru_maxrss * 1024)
get_metrics_for("process").register_callback("fds", _process_fds, labels=["type"])
# New prometheus-standard metric names
process_metrics = get_metrics_for("process")
if HAVE_PROC_SELF_STAT:
process_metrics.register_callback(
"cpu_user_seconds_total", lambda: float(stats[11]) / TICKS_PER_SEC
)
process_metrics.register_callback(
"cpu_system_seconds_total", lambda: float(stats[12]) / TICKS_PER_SEC
)
process_metrics.register_callback(
"cpu_seconds_total", lambda: (float(stats[11]) + float(stats[12])) / TICKS_PER_SEC
)
process_metrics.register_callback(
"virtual_memory_bytes", lambda: int(stats[20])
)
process_metrics.register_callback(
"resident_memory_bytes", lambda: int(stats[21]) * BYTES_PER_PAGE
)
process_metrics.register_callback(
"start_time_seconds", lambda: boot_time + int(stats[19]) / TICKS_PER_SEC
)
if HAVE_PROC_SELF_FD:
process_metrics.register_callback(
"open_fds", lambda: sum(fd_counts.values())
)
if HAVE_PROC_SELF_LIMITS:
def _get_max_fds():
with open("/proc/self/limits") as limits:
for line in limits:
if not line.startswith("Max open files "):
continue
# Line is Max open files $SOFT $HARD
return int(line.split()[3])
return None
process_metrics.register_callback(
"max_fds", lambda: _get_max_fds()
)