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