[checkmk-commits] 5988 docker_container_diskstat: Check disk usage of docker containers

Module: check_mk Branch: master Commit: 4fe5cad19fe28d84dc6c744ae1f141aed26d0db5 URL: http://git.mathias-kettner.de/git/?p=check_mk.git;a=commit;h=4fe5cad19fe28d… Author: Lars Michelsen &lt;lm(a)mathias-kettner.de&gt; Date: Thu Apr 19 12:27:16 2018 +0200 5988 docker_container_diskstat: Check disk usage of docker containers Change-Id: I3fe1d5bf03fbe8760e3eeea7d73e6cd6a62bee92 --- .werks/5988 | 11 +++ agents/check_mk_agent.linux | 7 ++ checkman/docker_container_diskstat | 20 ++++++ checks/docker_container_diskstat | 136 +++++++++++++++++++++++++++++++++++++ 4 files changed, 174 insertions(+) diff --git a/.werks/5988 b/.werks/5988 new file mode 100644 index 0000000..5f41f30 --- /dev/null +++ b/.werks/5988 @@ -0,0 +1,11 @@ +Title: docker_container_diskstat: Check disk usage of docker containers +Level: 1 +Component: checks +Class: feature +Compatible: compat +Edition: cre +State: unknown +Version: 1.6.0i1 +Date: 1524133606 + + diff --git a/agents/check_mk_agent.linux b/agents/check_mk_agent.linux index c4fbf40..b172403 100755 --- a/agents/check_mk_agent.linux +++ b/agents/check_mk_agent.linux @@ -489,10 +489,17 @@ if [ -z "$MK_IN_CONTAINER" ]; then fi else echo '<<<docker_container_diskstat>>>' + echo "[time]" + date +%s for F in io_service_bytes io_serviced; do echo "[$F]" cat "/sys/fs/cgroup/blkio/blkio.throttle.$F" done + echo "[names]" + for F in /sys/block/*; do + echo -n "${F##*/} " ; + cat "$F/dev"; + done fi diff --git a/checkman/docker_container_diskstat b/checkman/docker_container_diskstat new file mode 100644 index 0000000..6df80a0 --- /dev/null +++ b/checkman/docker_container_diskstat @@ -0,0 +1,20 @@ +title: Docker container disk throughput +agents: linux +catalog: app/docker +license: GPL +distribution: check_mk +description: + This check measures the throughput of block devices (disks) of docker + containers. You can either have a single check for every single disk or a + summary check (which is the default) summing up the throughput of all disks. + + This check measures the memory usage of a docker container respecting + either the memory limits of the docker node or the limit configured + for the container. + + Use the "Main memory usage (UNIX / Other Devices)" rule set to configure + thresholds on the memory usage. + +item: + Either {"SUMMARY"} for a summarized check of all disks or the name of the + disk device, e.g. {"sda"}. diff --git a/checks/docker_container_diskstat b/checks/docker_container_diskstat new file mode 100644 index 0000000..695ea2c --- /dev/null +++ b/checks/docker_container_diskstat @@ -0,0 +1,136 @@ +#!/usr/bin/python +# -*- encoding: utf-8; py-indent-offset: 4 -*- +# +------------------------------------------------------------------+ +# | ____ _ _ __ __ _ __ | +# | / ___| |__ ___ ___| | __ | \/ | |/ / | +# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / | +# | | |___| | | | __/ (__| < | | | | . \ | +# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ | +# | | +# | Copyright Mathias Kettner 2014 mk(a)mathias-kettner.de | +# +------------------------------------------------------------------+ +# +# This file is part of Check_MK. +# The official homepage is at http://mathias-kettner.de/check_mk. +# +# check_mk is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by +# the Free Software Foundation in version 2. check_mk is distributed +# in the hope that it will be useful, but WITHOUT ANY WARRANTY; with- +# out even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. See the GNU General Public License for more de- +# tails. You should have received a copy of the GNU General Public +# License along with GNU Make; see the file COPYING. If not, write +# to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, +# Boston, MA 02110-1301 USA. + +def parse_docker_container_diskstat(info): + node_sections = _parse_sub_sections(info) + + disks = {} + for node_name, node_info in node_sections.items(): + timestamp = node_info["time"] + + for device_id, device in node_info["devices"].items(): + # Filter out unwanted things + if device["name"].startswith("loop"): + continue + + # Skip devices without counts + if "ios" not in device or "bytes" not in device: + continue + + disks[(node_name, device["name"])] = timestamp, device + + return disks + + +def _parse_sub_sections(info): + node_sections = {} + + node = None + for line in info: + node = line[0] + + if line[1] == "[io_service_bytes]": + phase = "bytes" + elif line[1] == "[io_serviced]": + phase = "ios" + elif line[1] == '[names]': + phase = "names" + elif line[1] == '[time]': + phase = "time" + else: + if line[1] == "Total": + continue + + sections = node_sections.setdefault(node, {}) + + if phase == "time": + sections["time"] = int(line[1]) + continue + + devices = sections.setdefault("devices", {}) + + if phase == "names": + major, minor = map(int, line[2].split(":")) + else: + major, minor = map(int, line[1].split(":")) + + device_id = node, major, minor + device = devices.setdefault(device_id, {}) + + if phase == "names": + device["name"] = line[1] + else: + device_phase = device.setdefault(phase, {}) + device_phase[line[2]] = int(line[3]) + + return node_sections + + +def inventory_docker_container_diskstat(parsed): + return inventory_diskstat_generic(parsed.keys()) + + +def check_docker_container_diskstat(item, params, parsed): + disks = {} + for (node_name, device_name), (timestamp, device) in parsed.items(): + counter_base = "diskstat.%s." % device_name + + # Docker container information is provided via piggyback in the most cases. In case + # we got no new data simply skip this check + previous_timestamp = get_item_state(counter_base + "time") + if previous_timestamp == timestamp: + raise MKCounterWrapped('No time difference') + set_item_state(counter_base + "time", timestamp) + + read_ios_rate = get_rate(counter_base + "read_ios", timestamp, device["ios"]["Read"], onwrap=0.0) + write_ios_rate = get_rate(counter_base + "write_ios", timestamp, device["ios"]["Write"], onwrap=0.0) + total_ios_rate = read_ios_rate + write_ios_rate + read_bytes_rate = get_rate(counter_base + "read_bytes", timestamp, device["bytes"]["Read"], onwrap=0.0) + write_bytes_rate = get_rate(counter_base + "write_bytes", timestamp, device["bytes"]["Write"], onwrap=0.0) + total_bytes_rate = read_bytes_rate + write_bytes_rate + + disks[device_name] = { + "node" : node_name, + "read_ios" : read_ios_rate, + "write_ios" : write_ios_rate, + "read_throughput" : read_bytes_rate, + "write_throughput" : write_bytes_rate, + } + + return check_diskstat_dict(item, params, disks) + + +check_info["docker_container_diskstat"] = { + "parse_function" : parse_docker_container_diskstat, + "inventory_function" : inventory_docker_container_diskstat, + "check_function" : check_docker_container_diskstat, + "service_description" : "Disk IO %s", + "has_perfdata" : True, + "group" : "diskstat", + "node_info" : True, # add first column with actual host name + "includes" : [ "diskstat.include" ], +} +