prometheusmetricshost-metricsmachine-metricsnode-metricsprocfsprometheus-exportersystem-informationsystem-metrics
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50 lines
1.7 KiB
50 lines
1.7 KiB
// Copyright 2015 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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"os" |
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"regexp" |
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"strconv" |
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"strings" |
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) |
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func readUintFromFile(path string) (uint64, error) { |
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data, err := os.ReadFile(path) |
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if err != nil { |
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return 0, err |
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} |
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value, err := strconv.ParseUint(strings.TrimSpace(string(data)), 10, 64) |
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if err != nil { |
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return 0, err |
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} |
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return value, nil |
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} |
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var metricNameRegex = regexp.MustCompile(`_*[^0-9A-Za-z_]+_*`) |
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// SanitizeMetricName sanitize the given metric name by replacing invalid characters by underscores. |
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// |
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// OpenMetrics and the Prometheus exposition format require the metric name |
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// to consist only of alphanumericals and "_", ":" and they must not start |
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// with digits. Since colons in MetricFamily are reserved to signal that the |
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// MetricFamily is the result of a calculation or aggregation of a general |
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// purpose monitoring system, colons will be replaced as well. |
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// |
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// Note: If not subsequently prepending a namespace and/or subsystem (e.g., |
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// with prometheus.BuildFQName), the caller must ensure that the supplied |
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// metricName does not begin with a digit. |
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func SanitizeMetricName(metricName string) string { |
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return metricNameRegex.ReplaceAllString(metricName, "_") |
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}
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