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585 lines
19 KiB
585 lines
19 KiB
/*
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* Functions to make it easier to write prometheus consoles, such
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* as graphs.
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*
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*/
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PromConsole = {};
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PromConsole.NumberFormatter = {};
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PromConsole.NumberFormatter.prefixesBig = ["k", "M", "G", "T", "P", "E", "Z", "Y"];
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PromConsole.NumberFormatter.prefixesBig1024 = ["ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi"];
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PromConsole.NumberFormatter.prefixesSmall = ["m", "u", "n", "p", "f", "a", "z", "y"];
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PromConsole._stripTrailingZero = function(x) {
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if (x.indexOf("e") == -1) {
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// It's not safe to strip if it's scientific notation.
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return x.replace(/\.?0*$/, '');
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}
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return x;
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}
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// Humanize a number.
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PromConsole.NumberFormatter.humanize = function(x) {
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var ret = PromConsole.NumberFormatter._humanize(
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x, PromConsole.NumberFormatter.prefixesBig,
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PromConsole.NumberFormatter.prefixesSmall, 1000);
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x = ret[0];
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var prefix = ret[1];
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if (Math.abs(x) < 1) {
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return x.toExponential(3) + prefix;
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}
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return PromConsole._stripTrailingZero(x.toFixed(3)) + prefix;
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}
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// Humanize a number, don't use milli/micro/etc. prefixes.
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PromConsole.NumberFormatter.humanizeNoSmallPrefix = function(x) {
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if (Math.abs(x) < 1) {
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return PromConsole._stripTrailingZero(x.toPrecision(3));
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}
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var ret = PromConsole.NumberFormatter._humanize(
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x, PromConsole.NumberFormatter.prefixesBig,
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[], 1000);
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x = ret[0];
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var prefix = ret[1];
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return PromConsole._stripTrailingZero(x.toFixed(3)) + prefix;
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}
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// Humanize a number with 1024 as the base, rather than 1000.
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PromConsole.NumberFormatter.humanize1024 = function(x) {
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var ret = PromConsole.NumberFormatter._humanize(
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x, PromConsole.NumberFormatter.prefixesBig1024,
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[], 1024);
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x = ret[0];
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var prefix = ret[1];
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if (Math.abs(x) < 1) {
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return x.toExponential(3) + prefix;
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}
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return PromConsole._stripTrailingZero(x.toFixed(3)) + prefix;
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}
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// Humanize a number, returning an exact representation.
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PromConsole.NumberFormatter.humanizeExact = function(x) {
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var ret = PromConsole.NumberFormatter._humanize(
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x, PromConsole.NumberFormatter.prefixesBig,
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PromConsole.NumberFormatter.prefixesSmall, 1000);
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return ret[0] + ret[1];
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}
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PromConsole.NumberFormatter._humanize = function(x, prefixesBig, prefixesSmall, factor) {
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var prefix = ""
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if (x == 0) {
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/* Do nothing. */
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} else if (Math.abs(x) >= 1) {
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for (var i=0; i < prefixesBig.length && Math.abs(x) >= factor; ++i) {
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x /= factor;
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prefix = prefixesBig[i];
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}
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} else {
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for (var i=0; i < prefixesSmall.length && Math.abs(x) < 1; ++i) {
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x *= factor;
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prefix = prefixesSmall[i];
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}
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}
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return [x, prefix];
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};
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PromConsole.TimeControl = function() {
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document.getElementById("prom_graph_duration_shrink").onclick = this.decreaseDuration.bind(this);
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document.getElementById("prom_graph_duration_grow").onclick = this.increaseDuration.bind(this);
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document.getElementById("prom_graph_time_back").onclick = this.decreaseEnd.bind(this);
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document.getElementById("prom_graph_time_forward").onclick = this.increaseEnd.bind(this);
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document.getElementById("prom_graph_refresh_button").onclick = this.refresh.bind(this);
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this.durationElement = document.getElementById("prom_graph_duration");
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this.endElement = document.getElementById("prom_graph_time_end");
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this.durationElement.oninput = this.dispatch.bind(this);
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this.endElement.oninput = this.dispatch.bind(this);
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this.endElement.oninput = this.dispatch.bind(this);
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this.refreshValueElement = document.getElementById("prom_graph_refresh_button_value");
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var refreshList = document.getElementById("prom_graph_refresh_intervals");
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var refreshIntervals = ["Off", "1m", "5m", "15m", "1h"];
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for (var i=0; i < refreshIntervals.length; ++i) {
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var li = document.createElement("li");
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li.onclick = this.setRefresh.bind(this, refreshIntervals[i]);
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li.textContent = refreshIntervals[i];
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refreshList.appendChild(li);
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}
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this.durationElement.value = PromConsole.TimeControl.prototype.getHumanDuration(
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PromConsole.TimeControl._initialValues.duration);
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if (PromConsole.TimeControl._initialValues.endTimeNow === undefined) {
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this.endElement.value = PromConsole.TimeControl.prototype.getHumanDate(
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new Date(PromConsole.TimeControl._initialValues.endTime * 1000));
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}
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}
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PromConsole.TimeControl.timeFactors = {
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"y": 60 * 60 * 24 * 365,
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"w": 60 * 60 * 24 * 7,
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"d": 60 * 60 * 24,
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"h": 60 * 60,
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"m": 60,
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"s": 1
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};
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PromConsole.TimeControl.stepValues = [
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"10s", "1m", "5m", "15m", "30m", "1h", "2h", "6h", "12h", "1d", "2d",
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"1w", "2w", "4w", "8w", "1y", "2y"
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];
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PromConsole.TimeControl.prototype._setHash = function() {
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var duration = this.parseDuration(this.durationElement.value);
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var endTime = this.getEndDate() / 1000;
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window.location.hash = "#pctc" + encodeURIComponent(JSON.stringify(
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{duration: duration, endTime: endTime}));
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}
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PromConsole.TimeControl._initialValues = function() {
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var hash = window.location.hash;
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if (hash.indexOf('#pctc') == 0) {
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return JSON.parse(decodeURIComponent(hash.substring(5)));
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}
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return {duration: 3600, endTime: new Date().getTime() / 1000, endTimeNow: true};
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}();
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PromConsole.TimeControl.prototype.parseDuration = function(durationText) {
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var durationRE = new RegExp("^([0-9]+)([ywdhms]?)$");
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var matches = durationText.match(durationRE);
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if (!matches) { return 3600; }
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var value = parseInt(matches[1]);
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var unit = matches[2] || 's';
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return value * PromConsole.TimeControl.timeFactors[unit];
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};
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PromConsole.TimeControl.prototype.getHumanDuration = function(duration) {
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var units = [];
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for (var key in PromConsole.TimeControl.timeFactors) {
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units.push([PromConsole.TimeControl.timeFactors[key], key]);
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}
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units.sort(function(a, b) { return b[0] - a[0] });
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for (var i = 0; i < units.length; ++i) {
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if (duration % units[i][0] == 0) {
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return (duration / units[i][0]) + units[i][1];
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}
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}
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return duration;
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};
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PromConsole.TimeControl.prototype.increaseDuration = function() {
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var durationSeconds = this.parseDuration(this.durationElement.value);
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for (var i = 0; i < PromConsole.TimeControl.stepValues.length; i++) {
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if (durationSeconds < this.parseDuration(PromConsole.TimeControl.stepValues[i])) {
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this.setDuration(PromConsole.TimeControl.stepValues[i]);
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this.dispatch();
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return;
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}
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}
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};
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PromConsole.TimeControl.prototype.decreaseDuration = function() {
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var durationSeconds = this.parseDuration(this.durationElement.value);
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for (var i = PromConsole.TimeControl.stepValues.length - 1; i >= 0; i--) {
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if (durationSeconds > this.parseDuration(PromConsole.TimeControl.stepValues[i])) {
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this.setDuration(PromConsole.TimeControl.stepValues[i]);
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this.dispatch();
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return;
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}
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}
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};
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PromConsole.TimeControl.prototype.setDuration = function(duration) {
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this.durationElement.value = duration;
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this._setHash();
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};
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PromConsole.TimeControl.prototype.getEndDate = function() {
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if (this.endElement.value == '') {
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return null;
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}
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return new Date(this.endElement.value).getTime();
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};
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PromConsole.TimeControl.prototype.getOrSetEndDate = function() {
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var date = this.getEndDate();
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if (date) {
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return date;
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}
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date = new Date();
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this.setEndDate(date);
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return date;
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}
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PromConsole.TimeControl.prototype.getHumanDate = function(date) {
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var hours = date.getHours() < 10 ? '0' + date.getHours() : date.getHours();
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var minutes = date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes();
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return date.getFullYear() + "-" + (date.getMonth()+1) + "-" + date.getDate() + " " +
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hours + ":" + minutes;
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}
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PromConsole.TimeControl.prototype.setEndDate = function(date) {
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this.setRefresh("Off");
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this.endElement.value = this.getHumanDate(date);
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this._setHash();
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};
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PromConsole.TimeControl.prototype.increaseEnd = function() {
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// Increase duration 25% range & convert ms to s.
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this.setEndDate(new Date(this.getOrSetEndDate() + this.parseDuration(this.durationElement.value) * 1000/4 ));
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this.dispatch();
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};
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PromConsole.TimeControl.prototype.decreaseEnd = function() {
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this.setEndDate(new Date(this.getOrSetEndDate() - this.parseDuration(this.durationElement.value) * 1000/4 ));
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this.dispatch();
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};
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PromConsole.TimeControl.prototype.refresh = function() {
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this.endElement.value = '';
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this._setHash();
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this.dispatch();
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}
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PromConsole.TimeControl.prototype.dispatch = function() {
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var durationSeconds = this.parseDuration(this.durationElement.value);
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var end = this.getEndDate();
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if (end === null) {
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end = new Date().getTime();
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}
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for (var i = 0; i< PromConsole._graph_registry.length; i++) {
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var graph = PromConsole._graph_registry[i];
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graph.params.duration = durationSeconds;
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graph.params.endTime = end / 1000;
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graph.dispatch();
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}
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};
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PromConsole.TimeControl.prototype._refreshInterval = null;
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PromConsole.TimeControl.prototype.setRefresh = function(duration) {
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if (this._refreshInterval !== null) {
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window.clearInterval(this._refreshInterval);
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this._refreshInterval = null;
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}
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if (duration != "Off") {
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if (this.endElement.value != '') {
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this.refresh();
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}
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var durationSeconds = this.parseDuration(duration);
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this._refreshInterval = window.setInterval(this.dispatch.bind(this), durationSeconds * 1000);
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}
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this.refreshValueElement.textContent = duration;
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};
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// List of all graphs, used by time controls.
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PromConsole._graph_registry = [];
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PromConsole.graphDefaults = {
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expr: null, // Expression to graph. Can be a list of strings.
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node: null, // DOM node to place graph under.
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// How long the graph is over, in seconds.
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duration: PromConsole.TimeControl._initialValues.duration,
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// The unixtime the graph ends at.
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endTime: PromConsole.TimeControl._initialValues.endTime,
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width: null, // Height of the graph div, excluding titles and legends.
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// Defaults to auto-detection.
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height: 200, // Height of the graph div, excluding titles and legends.
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min: "auto", // Minimum Y-axis value, defaults to lowest data value.
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max: undefined, // Maximum Y-axis value, defaults to highest data value.
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renderer: 'line', // Type of graphs, options are 'line' and 'area'.
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name: null, // What to call plots, defaults to trying to do
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// something reasonable.
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// If a string, it'll use that. [[ label ]] will be substituted.
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// If a function it'll be called with a map of keys to values,
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// and should return the name to use.
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xTitle: "Time", // The title of the x axis.
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yUnits: "", // The units of the y axis.
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yTitle: "", // The title of the y axis.
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// Number formatter for y axis.
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yAxisFormatter: PromConsole.NumberFormatter.humanize,
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// Number formatter for y values hover detail.
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yHoverFormatter: PromConsole.NumberFormatter.humanizeExact,
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};
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PromConsole.Graph = function(params) {
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for (var k in PromConsole.graphDefaults) {
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if (!(k in params)) {
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params[k] = PromConsole.graphDefaults[k];
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}
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}
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if (typeof params.expr == "string") {
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params.expr = [params.expr]
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}
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this.params = params;
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this.rendered_data = null;
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PromConsole._graph_registry.push(this);
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/*
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* Table layout:
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* | yTitle | Graph |
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* | | xTitle |
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* | /graph | Legend |
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*/
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var table = document.createElement("table");
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table.className = "prom_graph_table";
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params.node.appendChild(table);
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var tr = document.createElement("tr");
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table.appendChild(tr);
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var yTitleTd = document.createElement("td");
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tr.appendChild(yTitleTd);
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var yTitleDiv = document.createElement("td");
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yTitleTd.appendChild(yTitleDiv);
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yTitleDiv.className = "prom_graph_ytitle";
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yTitleDiv.textContent = params.yTitle + (params.yUnits ? " (" + params.yUnits.trim() + ")" : "");
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this.graphTd = document.createElement("td");
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tr.appendChild(this.graphTd);
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this.graphTd.className = "rickshaw_graph";
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this.graphTd.width = params.width;
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this.graphTd.height = params.height;
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tr = document.createElement("tr");
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table.appendChild(tr);
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tr.appendChild(document.createElement("td"));
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var xTitleTd = document.createElement("td");
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tr.appendChild(xTitleTd);
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xTitleTd.className = "prom_graph_xtitle";
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xTitleTd.textContent = params.xTitle;
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tr = document.createElement("tr");
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table.appendChild(tr);
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var graphLinkTd = document.createElement("td");
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tr.appendChild(graphLinkTd);
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var graphLinkA = document.createElement("a");
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graphLinkTd.appendChild(graphLinkA);
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graphLinkA.className = "prom_graph_link";
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graphLinkA.textContent = "+";
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graphLinkA.href = PromConsole._graphsToSlashGraphURL(params.expr);
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var legendTd = document.createElement("td");
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tr.appendChild(legendTd);
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this.legendDiv = document.createElement("div");
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legendTd.width = params.width;
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legendTd.appendChild(this.legendDiv);
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window.addEventListener('resize', function() {
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if(this.rendered_data !== null) {
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this._render(this.rendered_data);
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}
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}.bind(this))
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this.dispatch();
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};
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PromConsole.Graph.prototype._render = function(data) {
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var palette = new Rickshaw.Color.Palette();
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var series = [];
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// This will be used on resize.
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this.rendered_data = data;
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var nameFunc;
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if (this.params.name === null) {
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nameFunc = PromConsole._chooseNameFunction(data);
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} else if (typeof this.params.name == "string") {
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nameFunc = function(metric) {
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return PromConsole._interpolateName(this.params.name, metric);
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}.bind(this);
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} else {
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nameFunc = this.params.name;
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}
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// Get the data into the right format.
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for (var e = 0; e < data.length; e++) {
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var len = 0;
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for (var i = 0; i < data[e].Value.length; i++) {
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series[len++] = {
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data: data[e].Value[i].Values.map(function(s) {return {x: s.Timestamp, y: parseFloat(s.Value)} }),
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color: palette.color(),
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name: nameFunc(data[e].Value[i].Metric),
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};
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}
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}
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this._clearGraph();
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if (!series.length) {
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var errorText = document.createElement("div");
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errorText.className = 'prom_graph_error';
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errorText.textContent = 'No timeseries returned';
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this.graphTd.appendChild(errorText);
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return;
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}
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// Render.
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var graph = new Rickshaw.Graph({
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interpolation: "linear",
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width: this.graphTd.offsetWidth,
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height: this.params.height,
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element: this.graphTd,
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renderer: this.params.renderer,
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max: this.params.max,
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min: this.params.min,
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series: series
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});
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var hoverDetail = new Rickshaw.Graph.HoverDetail({
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graph: graph,
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onRender: function() {
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var xLabel = this.element.getElementsByClassName("x_label")[0];
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var item = this.element.getElementsByClassName("item")[0];
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if (xLabel.offsetWidth + xLabel.offsetLeft + this.element.offsetLeft > graph.element.offsetWidth
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|| item.offsetWidth + item.offsetLeft + this.element.offsetLeft > graph.element.offsetWidth) {
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xLabel.classList.add("prom_graph_hover_flipped");
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item.classList.add("prom_graph_hover_flipped");
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} else {
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xLabel.classList.remove("prom_graph_hover_flipped");
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item.classList.remove("prom_graph_hover_flipped");
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}
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},
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yFormatter: function(y) {return this.params.yHoverFormatter(y) + this.params.yUnits}.bind(this)
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});
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var yAxis = new Rickshaw.Graph.Axis.Y({
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graph: graph,
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tickFormat: this.params.yAxisFormatter
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});
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var xAxis = new Rickshaw.Graph.Axis.Time({
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graph: graph,
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});
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var legend = new Rickshaw.Graph.Legend({
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graph: graph,
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element: this.legendDiv
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});
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xAxis.render();
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yAxis.render();
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graph.render();
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};
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PromConsole.Graph.prototype._clearGraph = function() {
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while (this.graphTd.lastChild) {
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this.graphTd.removeChild(this.graphTd.lastChild);
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}
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while (this.legendDiv.lastChild) {
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this.legendDiv.removeChild(this.legendDiv.lastChild);
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}
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}
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PromConsole.Graph.prototype._xhrs = []
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PromConsole.Graph.prototype.dispatch = function() {
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for (var j = 0; j < this._xhrs.length; j++) {
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this._xhrs[j].abort();
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}
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var all_data = new Array(this.params.expr.length);
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this._xhrs = new Array(this.params.expr.length);
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var pending_requests = this.params.expr.length;
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|
for (var i = 0; i < this.params.expr.length; ++i) {
|
|
var endTime = this.params.endTime;
|
|
var url = "/api/query_range?expr=" + encodeURIComponent(this.params.expr[i])
|
|
+ "&step=" + this.params.duration / this.graphTd.offsetWidth
|
|
+ "&range=" + this.params.duration + "&end=" + endTime;
|
|
var xhr = new XMLHttpRequest();
|
|
xhr.open('get', url, true);
|
|
xhr.responseType = 'json';
|
|
xhr.onerror = function(xhr, i) {
|
|
this._clearGraph();
|
|
var errorText = document.createElement("div");
|
|
errorText.className = 'prom_graph_error';
|
|
errorText.textContent = 'Error loading data';
|
|
this.graphTd.appendChild(errorText);
|
|
console.log('Error loading data for ' + this.params.expr[i]);
|
|
pending_requests = 0;
|
|
// onabort gets any aborts.
|
|
for (var j = 0; j < pending_requests; j++) {
|
|
this._xhrs[j].abort();
|
|
}
|
|
}.bind(this, xhr, i)
|
|
xhr.onload = function(xhr, i) {
|
|
if (pending_requests == 0) {
|
|
// Got an error before this success.
|
|
return;
|
|
}
|
|
var data = xhr.response;
|
|
pending_requests -= 1;
|
|
all_data[i] = data;
|
|
if (pending_requests == 0) {
|
|
this._xhrs = [];
|
|
this._render(all_data);
|
|
}
|
|
}.bind(this, xhr, i)
|
|
xhr.send();
|
|
this._xhrs[i] = xhr;
|
|
}
|
|
|
|
var loadingImg = document.createElement("img");
|
|
loadingImg.src = '/static/img/ajax-loader.gif';
|
|
loadingImg.alt = 'Loading...';
|
|
loadingImg.className = 'prom_graph_loading';
|
|
this.graphTd.appendChild(loadingImg);
|
|
};
|
|
|
|
// Substitue the value of 'label' for [[ label ]].
|
|
PromConsole._interpolateName = function(name, metric) {
|
|
var re = /(.*?)\[\[\s*(\w+)+\s*\]\](.*?)/g;
|
|
var result = '';
|
|
while (match = re.exec(name)) {
|
|
result = result + match[1] + metric[match[2]] + match[3]
|
|
}
|
|
if (!result) {
|
|
return name;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// Given the data returned by the API, return an appropriate function
|
|
// to return plot names.
|
|
PromConsole._chooseNameFunction = function(data) {
|
|
// By default, use the full metric name.
|
|
var nameFunc = function (metric) {
|
|
name = metric.__name__ + "{";
|
|
for (var label in metric) {
|
|
if (label.substring(0,2) == "__") {
|
|
continue;
|
|
}
|
|
name += label + "='" + metric[label] + "',";
|
|
}
|
|
return name + "}";
|
|
}
|
|
// If only one label varies, use that value.
|
|
var labelValues = {};
|
|
for (var e = 0; e < data.length; e++) {
|
|
for (var i = 0; i < data[e].Value.length; i++) {
|
|
for (var label in data[e].Value[i].Metric) {
|
|
if (!(label in labelValues)) {
|
|
labelValues[label] = {};
|
|
}
|
|
labelValues[label][data[e].Value[i].Metric[label]] = 1;
|
|
}
|
|
}
|
|
}
|
|
var multiValueLabels = [];
|
|
for (var label in labelValues) {
|
|
if (Object.keys(labelValues[label]).length > 1) {
|
|
multiValueLabels.push(label);
|
|
}
|
|
}
|
|
if (multiValueLabels.length == 1) {
|
|
nameFunc = function(metric) {
|
|
return metric[multiValueLabels[0]];
|
|
}
|
|
}
|
|
return nameFunc;
|
|
}
|
|
|
|
|
|
// Given a list of expressions, produce the /graph url for them.
|
|
PromConsole._graphsToSlashGraphURL = function(exprs) {
|
|
var data = [];
|
|
for (var i = 0; i < exprs.length; ++i) {
|
|
data.push({'expr': exprs[i], 'tab': 0});
|
|
}
|
|
return '/graph#' + encodeURIComponent(JSON.stringify(data));
|
|
|
|
};
|