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0af7b7abba
* Update Go build to 1.27.x. * Enable `gofumpt` formatter. * Sync golangci-lint from Prometheus. * Apply lint/format fixes. Signed-off-by: Ben Kochie <superq@gmail.com>
68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
// Copyright 2018 The Prometheus Authors
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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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//go:build !noprocesses
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package collector
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import (
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"errors"
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"fmt"
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"log/slog"
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"os"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/procfs"
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)
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type kernelHungCollector struct {
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fs procfs.FS
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logger *slog.Logger
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}
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func init() {
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registerCollector("kernel_hung", defaultEnabled, NewKernelHungCollector)
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}
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func NewKernelHungCollector(logger *slog.Logger) (Collector, error) {
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fs, err := procfs.NewFS(*procPath)
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if err != nil {
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return nil, fmt.Errorf("failed to open procfs: %w", err)
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}
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return &kernelHungCollector{
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fs: fs,
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logger: logger,
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}, nil
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}
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var kernelHungTasks = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "kernel_hung", "tasks_total"),
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"Total number of tasks that have been detected as hung since the system booted.",
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nil, nil,
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)
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func (c *kernelHungCollector) Update(ch chan<- prometheus.Metric) error {
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kernelHung, err := c.fs.KernelHung()
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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c.logger.Debug("hung_task_detect_count does not exist")
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return ErrNoData
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}
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return err
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}
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ch <- prometheus.MustNewConstMetric(kernelHungTasks, prometheus.CounterValue, float64(*kernelHung.HungTaskDetectCount))
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return nil
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}
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