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// Copyright 2015 The Prometheus Authors | ||
// 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. | ||
|
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//go:build !noudp_drops | ||
// +build !noudp_drops | ||
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package collector | ||
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import ( | ||
"errors" | ||
"fmt" | ||
"log/slog" | ||
"os" | ||
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"github.com/prometheus/client_golang/prometheus" | ||
"github.com/prometheus/procfs" | ||
) | ||
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type ( | ||
udpDropsCollector struct { | ||
fs procfs.FS | ||
desc *prometheus.Desc | ||
logger *slog.Logger | ||
} | ||
) | ||
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func init() { | ||
registerCollector("udp_drops", defaultEnabled, NewUDPdropsCollector) | ||
} | ||
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// NewUDPdropsCollector returns a new Collector exposing network udp drops count. | ||
func NewUDPdropsCollector(logger *slog.Logger) (Collector, error) { | ||
fs, err := procfs.NewFS(*procPath) | ||
if err != nil { | ||
return nil, fmt.Errorf("failed to open procfs: %w", err) | ||
} | ||
return &udpDropsCollector{ | ||
fs: fs, | ||
desc: prometheus.NewDesc( | ||
prometheus.BuildFQName(namespace, "udp", "drops_total"), | ||
"Total number of datagrams dropped.", | ||
[]string{"ip"}, nil, | ||
), | ||
logger: logger, | ||
}, nil | ||
} | ||
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func (c *udpDropsCollector) Update(ch chan<- prometheus.Metric) error { | ||
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s4, errIPv4 := c.fs.NetUDPSummary() | ||
if errIPv4 == nil { | ||
if s4.Drops != nil { | ||
ch <- prometheus.MustNewConstMetric(c.desc, prometheus.CounterValue, float64(*s4.Drops), "v4") | ||
} | ||
} else { | ||
if errors.Is(errIPv4, os.ErrNotExist) { | ||
c.logger.Debug("not collecting ipv4 based metrics") | ||
} else { | ||
return fmt.Errorf("couldn't get udp drops: %w", errIPv4) | ||
} | ||
} | ||
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s6, errIPv6 := c.fs.NetUDP6Summary() | ||
if errIPv6 == nil { | ||
if s6.Drops != nil { | ||
ch <- prometheus.MustNewConstMetric(c.desc, prometheus.CounterValue, float64(*s6.Drops), "v6") | ||
} | ||
} else { | ||
if errors.Is(errIPv6, os.ErrNotExist) { | ||
c.logger.Debug("not collecting ipv6 based metrics") | ||
} else { | ||
return fmt.Errorf("couldn't get udp6 drops: %w", errIPv6) | ||
} | ||
} | ||
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if errors.Is(errIPv4, os.ErrNotExist) && errors.Is(errIPv6, os.ErrNotExist) { | ||
return ErrNoData | ||
} | ||
return nil | ||
} |
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