be2cd1b72c
Test Plan: - Check `:9100/metrics` for existence of inode-related metrics Reviewers: h.marvi, mhyousefi Reviewed By: h.marvi Differential Revision: https://phab.hamravesh.ir/D816
87 lines
2.8 KiB
Python
87 lines
2.8 KiB
Python
import json
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import os
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import subprocess
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from prometheus_client.core import REGISTRY
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from prometheus_client.exposition import start_http_server
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from prometheus_client.metrics_core import GaugeMetricFamily
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import rawfile_util
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from rawfile_util import attached_loops
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class VolumeStatsCollector(object):
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def collect(self):
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VOLUME_ID = "volume_id"
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fs_size = GaugeMetricFamily(
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"rawfile_filesystem_size_bytes",
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"Filesystem size in bytes.",
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labels=[VOLUME_ID],
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)
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fs_free = GaugeMetricFamily(
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"rawfile_filesystem_avail_bytes",
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"Filesystem free space in bytes",
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labels=[VOLUME_ID],
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)
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fs_files = GaugeMetricFamily(
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"rawfile_filesystem_files",
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"Filesystem total file nodes.",
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labels=[VOLUME_ID],
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)
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fs_files_free = GaugeMetricFamily(
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"rawfile_filesystem_files_free",
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"Filesystem total free file nodes",
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labels=[VOLUME_ID],
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)
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dev_size = GaugeMetricFamily(
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"rawfile_device_size_bytes", "Device size in bytes.", labels=[VOLUME_ID]
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)
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dev_free = GaugeMetricFamily(
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"rawfile_device_free_bytes",
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"Device free space in bytes.",
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labels=[VOLUME_ID],
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)
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for volume_id in rawfile_util.list_all_volumes():
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img_file = rawfile_util.img_file(volume_id)
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labels = [volume_id]
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dev_stat = img_file.stat()
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dev_size.add_metric(labels, dev_stat.st_size)
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dev_free.add_metric(labels, dev_stat.st_size - dev_stat.st_blocks * 512)
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mountpoint = volume_to_mountpoint(img_file)
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if mountpoint is not None:
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fs_stat = os.statvfs(mountpoint)
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fs_size.add_metric(labels, fs_stat.f_frsize * fs_stat.f_blocks)
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fs_free.add_metric(labels, fs_stat.f_frsize * fs_stat.f_bfree)
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fs_files.add_metric(labels, fs_stat.f_files)
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fs_files_free.add_metric(labels, fs_stat.f_ffree)
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return [fs_size, fs_free, fs_files, fs_files_free, dev_size, dev_free]
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def volume_to_mountpoint(img_file):
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for dev in attached_loops(img_file):
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mountpoint = dev_to_mountpoint(dev)
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if mountpoint is not None:
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return mountpoint
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return None
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def dev_to_mountpoint(dev_name):
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try:
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output = subprocess.run(
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f"findmnt --json --first-only {dev_name}",
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shell=True,
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check=True,
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capture_output=True,
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).stdout.decode()
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data = json.loads(output)
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return data["filesystems"][0]["target"]
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except subprocess.CalledProcessError:
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return None
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def expose_metrics():
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REGISTRY.register(VolumeStatsCollector())
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start_http_server(9100)
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