Rewrite Docker plugin
Fix: - CPU - Memory Add: - Containers number - Containers status - Images number - Volumes number
This commit is contained in:
Doctor
Lars Kruse
parent
276169a6c9
commit
937cb1d030
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@ -0,0 +1,190 @@
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#!/usr/bin/env python3
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"""
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=head1 NAME
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docker_ - Docker wildcard-plugin to monitor a L<Docker|https://www.docker.com> host.
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This wildcard plugin provides at the moment only the suffixes C<containers>, C<images>, C<status>,
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C<volumes>, C<cpu> and C<memory>.
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=head1 INSTALLATION
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- Copy this plugin in your munin plugins directory
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- Install Python3 "docker" package
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=over 2
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ln -s /usr/share/munin/plugins/docker_ /etc/munin/plugins/docker_containers
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ln -s /usr/share/munin/plugins/docker_ /etc/munin/plugins/docker_cpu
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ln -s /usr/share/munin/plugins/docker_ /etc/munin/plugins/docker_images
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ln -s /usr/share/munin/plugins/docker_ /etc/munin/plugins/docker_memory
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ln -s /usr/share/munin/plugins/docker_ /etc/munin/plugins/docker_status
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ln -s /usr/share/munin/plugins/docker_ /etc/munin/plugins/docker_volumes
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=back
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After the installation you need to restart your munin-node:
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=over 2
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systemctl restart munin-node
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=back
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=head1 CONFIGURATION
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This plugin need to run as root, you need to create a file named docker placed in the
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directory /etc/munin/plugin-conf.d/ with the following config (you can also use
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Docker environment variables here as described in
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https://docs.docker.com/compose/reference/envvars/):
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=over 2
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[docker_*]
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user root
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env.DOCKER_HOST unix://var/run/docker.sock
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=back
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"""
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import os
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import sys
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import docker
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def print_containers_status(client):
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running = 0
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paused = 0
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created = 0
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restarting = 0
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removing = 0
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exited = 0
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dead = 0
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for container in client.containers.list():
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if container.status == 'running':
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running += 1
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elif container.status == 'paused':
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paused += 1
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elif container.status == 'created':
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created += 1
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elif container.status == 'restarting':
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restarting += 1
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elif container.status == 'removing':
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removing += 1
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elif container.status == 'exited':
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exited += 1
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elif container.status == 'dead':
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dead += 1
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print('running.value', running)
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print('paused.value', paused)
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print('created.value', created)
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print('restarting.value', restarting)
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print('removing.value', removing)
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print('exited.value', exited)
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print('dead.value', dead)
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def print_containers_cpu(client):
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for container in client.containers.list():
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stats = container.stats(stream=False)
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cpu_count = len(stats["cpu_stats"]["cpu_usage"]["percpu_usage"])
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cpu_percent = 0.0
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cpu_delta = float(stats["cpu_stats"]["cpu_usage"]["total_usage"]) \
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- float(stats["precpu_stats"]["cpu_usage"]["total_usage"])
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system_delta = float(stats["cpu_stats"]["system_cpu_usage"]) \
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- float(stats["precpu_stats"]["system_cpu_usage"])
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if system_delta > 0.0:
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cpu_percent = cpu_delta / system_delta * 100.0 * cpu_count
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print(container.name + '.value', cpu_percent)
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def print_containers_memory(client):
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for container in client.containers.list():
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stats = container.stats(stream=False)['memory_stats']
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print(container.name + '.value', stats['stats']['total_rss'])
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def main():
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try:
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mode = sys.argv[1]
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except IndexError:
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mode = ""
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wildcard = sys.argv[0].split("docker_")[1].split("_")[0]
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if mode == "suggest":
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print("containers")
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print("cpu")
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print("images")
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print("memory")
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print("status")
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print("volumes")
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client = docker.from_env()
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if wildcard == "status":
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if mode == "config":
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print("graph_title Docker status")
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print("graph_vlabel containers")
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print("graph_category virtualization")
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print("running.label RUNNING")
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print("paused.label PAUSED")
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print("created.label CREATED")
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print("restarting.label RESTARTING")
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print("removing.label REMOVING")
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print("exited.label EXITED")
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print("dead.label DEAD")
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else:
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print_containers_status(client)
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elif wildcard == "containers":
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if mode == "config":
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print("graph_title Docker containers")
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print("graph_vlabel containers")
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print("graph_category virtualization")
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print("containers_quantity.label Containers")
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else:
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print('containers_quantity.value', len(client.containers.list()))
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elif wildcard == "images":
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if mode == "config":
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print("graph_title Docker images")
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print("graph_vlabel images")
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print("graph_category virtualization")
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print("images_quantity.label Images")
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else:
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print('images_quantity.value', len(client.images.list()))
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elif wildcard == "volumes":
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if mode == "config":
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print("graph_title Docker volumes")
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print("graph_vlabel volumes")
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print("graph_category virtualization")
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print("volumes_quantity.label Volumes")
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else:
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print('volumes_quantity.value', len(client.volumes.list()))
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elif wildcard == "cpu":
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if mode == "config":
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graphlimit = str(os.cpu_count() * 100)
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print("graph_title Docker containers CPU usage")
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print("graph_args --base 1000 -r --lower-limit 0 --upper-limit " + graphlimit)
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print("graph_scale no")
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print("graph_period second")
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print("graph_vlabel CPU usage (%)")
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print("graph_category virtualization")
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print("graph_info This graph shows docker container CPU usage.")
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for container in client.containers.list():
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print("{}.label {}".format(container.name, container.name))
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else:
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print_containers_cpu(client)
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elif wildcard == "memory":
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if mode == "config":
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print("graph_title Docker containers memory usage")
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print("graph_args --base 1024 -l 0")
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print("graph_vlabel Bytes")
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print("graph_category virtualization")
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print("graph_info This graph shows docker container memory usage.")
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for container in client.containers.list():
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print("{}.label {}".format(container.name, container.name))
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else:
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print_containers_memory(client)
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if __name__ == '__main__':
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main()
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