mirror of
https://github.com/prometheus/node_exporter.git
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16f7122d31
While the CPU vulnerabilities collector has been added in https://github.com/prometheus/node_exporter/pull/2721 , it's currently not including information regarding the mitigation strategy used for a given vulnerability. This information can be quite valuable, as often times different mitigation strategies come with a different performance impact. This commit adds a third label to the cpu_vulnerabilities_info metric, to include the "mitigation" used for a given vulnerability - if a given vulnerability is not affecting a node or the node is still vulnerable, the mitigation is expected to be empty. Signed-off-by: João Lima <jlima@cloudflare.com>
70 lines
2 KiB
Go
70 lines
2 KiB
Go
// Copyright 2023 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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package collector
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import (
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"fmt"
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"github.com/go-kit/log"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/procfs/sysfs"
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)
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const (
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cpuVulerabilitiesCollector = "cpu_vulnerabilities"
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)
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var (
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vulnerabilityDesc = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, cpuVulerabilitiesCollector, "info"),
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"Details of each CPU vulnerability reported by sysfs. The value of the series is an int encoded state of the vulnerability. The same state is stored as a string in the label",
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[]string{"codename", "state", "mitigation"},
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nil,
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)
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)
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type cpuVulnerabilitiesCollector struct{}
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func init() {
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registerCollector(cpuVulerabilitiesCollector, defaultDisabled, NewVulnerabilitySysfsCollector)
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}
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func NewVulnerabilitySysfsCollector(logger log.Logger) (Collector, error) {
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return &cpuVulnerabilitiesCollector{}, nil
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}
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func (v *cpuVulnerabilitiesCollector) Update(ch chan<- prometheus.Metric) error {
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fs, err := sysfs.NewFS(*sysPath)
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if err != nil {
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return fmt.Errorf("failed to open sysfs: %w", err)
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}
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vulnerabilities, err := fs.CPUVulnerabilities()
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if err != nil {
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return fmt.Errorf("failed to get vulnerabilities: %w", err)
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}
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for _, vulnerability := range vulnerabilities {
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ch <- prometheus.MustNewConstMetric(
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vulnerabilityDesc,
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prometheus.GaugeValue,
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1.0,
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vulnerability.CodeName,
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sysfs.VulnerabilityHumanEncoding[vulnerability.State],
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vulnerability.Mitigation,
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)
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}
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return nil
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}
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