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Added ordering to tags and values, set tags as first in metrics to prevent overwriting very much needed metric labels.

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Rick van Drongelen 2025-07-01 12:03:50 +02:00
parent fe8c839237
commit 2e597c7697
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1 changed files with 18 additions and 10 deletions
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28
server/prometheus.js
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@ -16,13 +16,13 @@ class Prometheus {
*/
constructor(monitor, tags) {
this.monitorLabelValues = {
...this.mapTagsToLabels(tags),
monitor_id: monitor.id,
monitor_name: monitor.name,
monitor_type: monitor.type,
monitor_url: monitor.url,
monitor_hostname: monitor.hostname,
monitor_port: monitor.port,
...this.mapTagsToLabels(tags)
monitor_port: monitor.port
};
}
@ -34,20 +34,22 @@ class Prometheus {
* @returns {Promise<void>}
*/
static async init() {
const tags = (await R.findAll("tag")).map((tag) => {
// Add all available tags as possible labels,
// and use Set to remove possible duplicates (for when multiple tags contain non-ascii characters, and thus are sanitized to the same label)
const tags = new Set((await R.findAll("tag")).map((tag) => {
return Prometheus.sanitizeForPrometheus(tag.name);
}).filter((tagName) => {
return tagName !== "";
});
}));
const commonLabels = [
...tags,
"monitor_id",
"monitor_name",
"monitor_type",
"monitor_url",
"monitor_hostname",
"monitor_port",
...tags // Add all available tags as possible labels
];
monitorCertDaysRemaining = new PrometheusClient.Gauge({
@ -84,13 +86,13 @@ class Prometheus {
static sanitizeForPrometheus(text) {
text = text.replace(/[^a-zA-Z0-9_]/g, "");
text = text.replace(/^[^a-zA-Z_]+/, "");
return text;
return text.toLowerCase();
}
/**
* Map the tags value to valid labels used in Prometheus. Sanitize them in the process.
* @param {Array<{name: string, value:?string}>} tags The tags to map
* @returns {Array<string, string>} The mapped tags, usable as labels
* @returns {object} The mapped tags, usable as labels
*/
mapTagsToLabels(tags) {
let mappedTags = {};
@ -101,16 +103,22 @@ class Prometheus {
}
if (mappedTags[sanitizedTag] === undefined) {
mappedTags[sanitizedTag] = "null";
mappedTags[sanitizedTag] = [];
}
let tagValue = Prometheus.sanitizeForPrometheus(tag.value);
if (tagValue !== "") {
mappedTags[sanitizedTag] = mappedTags[sanitizedTag] !== "null" ? mappedTags[sanitizedTag] + `,${tagValue}` : tagValue;
mappedTags[sanitizedTag].push(tagValue);
}
mappedTags[sanitizedTag] = mappedTags[sanitizedTag].sort();
});
return mappedTags;
// Order the tags alphabetically
return Object.keys(mappedTags).sort().reduce((obj, key) => {
obj[key] = mappedTags[key];
return obj;
}, {});
}
/**