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devenv: loki: better fake logs (#50024)

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* devenv: loki: more log-levels

* devenv: loki: logfmt mode
This commit is contained in:
Gábor Farkas 2022-06-02 10:23:26 +02:00 committed by GitHub
parent 6112bd0c63
commit 52c775368b
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1 changed files with 42 additions and 10 deletions
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52
devenv/docker/blocks/loki/data/data.js
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@ -66,16 +66,51 @@ async function lokiSendLogLine(timestampMs, line, tags) {
await jsonRequest(data, 'POST', url, 204);
}
function getRandomLogLine(counter) {
function getRandomLogItem(counter) {
const randomText = `${Math.trunc(Math.random() * 1000 * 1000 * 1000)}`;
const maybeAnsiText = Math.random() < 0.5 ? 'with ANSI \u001b[31mpart of the text\u001b[0m' : '';
return JSON.stringify({
return {
_entry: `log text ${maybeAnsiText} [${randomText}]`,
counter: counter.toString(),
float: Math.random() > 0.2 ? (100 * Math.random()).toString() : 'NaN',
float: Math.random() > 0.2 ? (Math.trunc(100000 * Math.random())/1000).toString() : 'NaN',
label: chooseRandomElement(['val1', 'val2', 'val3']),
level: chooseRandomElement(['info', 'info', 'error']),
level: chooseRandomElement(['debug','info', 'info', 'info', 'info', 'warning', 'error', 'error']),
};
}
function getRandomJSONLogLine(counter) {
const item = getRandomLogItem(counter)
return JSON.stringify(item)
}
const logFmtProblemRe = /[="\n]/;
// we are not really escaping things, we just check
// that we don't need to escape :-)
function escapeLogFmtKey(key) {
if (logFmtProblemRe.test(key)) {
throw new Error(`invalid logfmt-key: ${key}`)
}
return key;
}
function escapeLogFmtValue(value) {
if (logFmtProblemRe.test(value)) {
throw new Error(`invalid logfmt-value: ${key}`)
}
// we must handle the space-character because we have values with spaces :-(
return value.indexOf(' ') === -1 ? value : `"${value}"`
}
function logFmtLine(item) {
const parts = Object.entries(item).map(([k,v]) => {
const key = escapeLogFmtKey(k.toString());
const value = escapeLogFmtValue(v.toString());
return `${key}=${value}`;
});
return parts.join(' ');
}
const SLEEP_ANGLE_STEP = Math.PI / 200;
@ -86,15 +121,12 @@ function getNextSineWaveSleepDuration() {
}
async function main() {
const tags = {
place: 'moon',
};
for (let step = 0; step < 300; step++) {
await sleep(getNextSineWaveSleepDuration());
const timestampMs = new Date().getTime();
const line = getRandomLogLine(step + 1);
lokiSendLogLine(timestampMs, line, tags);
const item = getRandomLogItem(step + 1)
lokiSendLogLine(timestampMs, JSON.stringify(item), {place:'moon'});
lokiSendLogLine(timestampMs, logFmtLine(item), {place:'luna'});
}
}