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prometheus/web/ui/static/js/prom_console.js

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/*
* Functions to make it easier to write prometheus consoles, such
* as graphs.
*
*/
PromConsole = {};
PromConsole.NumberFormatter = {};
PromConsole.NumberFormatter.prefixesBig = ["k", "M", "G", "T", "P", "E", "Z", "Y"];
PromConsole.NumberFormatter.prefixesBig1024 = ["ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi"];
PromConsole.NumberFormatter.prefixesSmall = ["m", "u", "n", "p", "f", "a", "z", "y"];
PromConsole._stripTrailingZero = function(x) {
if (x.indexOf("e") == -1) {
// It's not safe to strip if it's scientific notation.
return x.replace(/\.?0*$/, '');
}
return x;
};
// Humanize a number.
PromConsole.NumberFormatter.humanize = function(x) {
var ret = PromConsole.NumberFormatter._humanize(
x, PromConsole.NumberFormatter.prefixesBig,
PromConsole.NumberFormatter.prefixesSmall, 1000);
x = ret[0];
var prefix = ret[1];
if (Math.abs(x) < 1) {
return x.toExponential(3) + prefix;
}
return PromConsole._stripTrailingZero(x.toFixed(3)) + prefix;
};
// Humanize a number, don't use milli/micro/etc. prefixes.
PromConsole.NumberFormatter.humanizeNoSmallPrefix = function(x) {
if (Math.abs(x) < 1) {
return PromConsole._stripTrailingZero(x.toPrecision(3));
}
var ret = PromConsole.NumberFormatter._humanize(
x, PromConsole.NumberFormatter.prefixesBig,
[], 1000);
x = ret[0];
var prefix = ret[1];
return PromConsole._stripTrailingZero(x.toFixed(3)) + prefix;
};
// Humanize a number with 1024 as the base, rather than 1000.
PromConsole.NumberFormatter.humanize1024 = function(x) {
var ret = PromConsole.NumberFormatter._humanize(
x, PromConsole.NumberFormatter.prefixesBig1024,
[], 1024);
x = ret[0];
var prefix = ret[1];
if (Math.abs(x) < 1) {
return x.toExponential(3) + prefix;
}
return PromConsole._stripTrailingZero(x.toFixed(3)) + prefix;
};
// Humanize a number, returning an exact representation.
PromConsole.NumberFormatter.humanizeExact = function(x) {
var ret = PromConsole.NumberFormatter._humanize(
x, PromConsole.NumberFormatter.prefixesBig,
PromConsole.NumberFormatter.prefixesSmall, 1000);
return ret[0] + ret[1];
};
PromConsole.NumberFormatter._humanize = function(x, prefixesBig, prefixesSmall, factor) {
var prefix = "";
if (x === 0) {
/* Do nothing. */
} else if (Math.abs(x) >= 1) {
for (var i=0; i < prefixesBig.length && Math.abs(x) >= factor; ++i) {
x /= factor;
prefix = prefixesBig[i];
}
} else {
for (var i=0; i < prefixesSmall.length && Math.abs(x) < 1; ++i) {
x *= factor;
prefix = prefixesSmall[i];
}
}
return [x, prefix];
};
PromConsole.TimeControl = function() {
document.getElementById("prom_graph_duration_shrink").onclick = this.decreaseDuration.bind(this);
document.getElementById("prom_graph_duration_grow").onclick = this.increaseDuration.bind(this);
document.getElementById("prom_graph_time_back").onclick = this.decreaseEnd.bind(this);
document.getElementById("prom_graph_time_forward").onclick = this.increaseEnd.bind(this);
document.getElementById("prom_graph_refresh_button").onclick = this.refresh.bind(this);
this.durationElement = document.getElementById("prom_graph_duration");
this.endElement = document.getElementById("prom_graph_time_end");
this.durationElement.oninput = this.dispatch.bind(this);
this.endElement.oninput = this.dispatch.bind(this);
this.endElement.oninput = this.dispatch.bind(this);
this.refreshValueElement = document.getElementById("prom_graph_refresh_button_value");
var refreshList = document.getElementById("prom_graph_refresh_intervals");
var refreshIntervals = ["Off", "1m", "5m", "15m", "1h"];
for (var i=0; i < refreshIntervals.length; ++i) {
var li = document.createElement("li");
li.onclick = this.setRefresh.bind(this, refreshIntervals[i]);
li.textContent = refreshIntervals[i];
refreshList.appendChild(li);
}
this.durationElement.value = PromConsole.TimeControl.prototype.getHumanDuration(
PromConsole.TimeControl._initialValues.duration);
if (!PromConsole.TimeControl._initialValues.endTimeNow) {
this.endElement.value = PromConsole.TimeControl.prototype.getHumanDate(
new Date(PromConsole.TimeControl._initialValues.endTime * 1000));
}
};
PromConsole.TimeControl.timeFactors = {
"y": 60 * 60 * 24 * 365,
"w": 60 * 60 * 24 * 7,
"d": 60 * 60 * 24,
"h": 60 * 60,
"m": 60,
"s": 1
};
PromConsole.TimeControl.stepValues = [
"10s", "1m", "5m", "15m", "30m", "1h", "2h", "6h", "12h", "1d", "2d",
"1w", "2w", "4w", "8w", "1y", "2y"
];
PromConsole.TimeControl.prototype._setHash = function() {
var duration = this.parseDuration(this.durationElement.value);
var endTime = this.getEndDate() / 1000;
window.location.hash = "#pctc" + encodeURIComponent(JSON.stringify(
{duration: duration, endTime: endTime}));
};
PromConsole.TimeControl._initialValues = function() {
var hash = window.location.hash;
var values;
if (hash.indexOf('#pctc') === 0) {
values = JSON.parse(decodeURIComponent(hash.substring(5)));
} else {
values = {duration: 3600, endTime: 0};
}
if (values.endTime == 0) {
values.endTime = new Date().getTime() / 1000;
values.endTimeNow = true;
}
return values;
}();
PromConsole.TimeControl.prototype.parseDuration = function(durationText) {
var durationRE = new RegExp("^([0-9]+)([ywdhms]?)$");
var matches = durationText.match(durationRE);
if (!matches) { return 3600; }
var value = parseInt(matches[1]);
var unit = matches[2] || 's';
return value * PromConsole.TimeControl.timeFactors[unit];
};
PromConsole.TimeControl.prototype.getHumanDuration = function(duration) {
var units = [];
for (var key in PromConsole.TimeControl.timeFactors) {
units.push([PromConsole.TimeControl.timeFactors[key], key]);
}
units.sort(function(a, b) { return b[0] - a[0]; });
for (var i = 0; i < units.length; ++i) {
if (duration % units[i][0] === 0) {
return (duration / units[i][0]) + units[i][1];
}
}
return duration;
};
PromConsole.TimeControl.prototype.increaseDuration = function() {
var durationSeconds = this.parseDuration(this.durationElement.value);
for (var i = 0; i < PromConsole.TimeControl.stepValues.length; i++) {
if (durationSeconds < this.parseDuration(PromConsole.TimeControl.stepValues[i])) {
this.setDuration(PromConsole.TimeControl.stepValues[i]);
this.dispatch();
return;
}
}
};
PromConsole.TimeControl.prototype.decreaseDuration = function() {
var durationSeconds = this.parseDuration(this.durationElement.value);
for (var i = PromConsole.TimeControl.stepValues.length - 1; i >= 0; i--) {
if (durationSeconds > this.parseDuration(PromConsole.TimeControl.stepValues[i])) {
this.setDuration(PromConsole.TimeControl.stepValues[i]);
this.dispatch();
return;
}
}
};
PromConsole.TimeControl.prototype.setDuration = function(duration) {
this.durationElement.value = duration;
this._setHash();
};
PromConsole.TimeControl.prototype.getEndDate = function() {
if (this.endElement.value === '') {
return null;
}
var dateParts = this.endElement.value.split(/[- :]/)
return Date.UTC(dateParts[0], dateParts[1] - 1, dateParts[2], dateParts[3], dateParts[4]);
};
PromConsole.TimeControl.prototype.getOrSetEndDate = function() {
var date = this.getEndDate();
if (date) {
return date;
}
date = new Date();
this.setEndDate(date);
return date.getTime();
};
PromConsole.TimeControl.prototype.getHumanDate = function(date) {
var hours = date.getUTCHours() < 10 ? '0' + date.getUTCHours() : date.getUTCHours();
var minutes = date.getUTCMinutes() < 10 ? '0' + date.getUTCMinutes() : date.getUTCMinutes();
return date.getUTCFullYear() + "-" + (date.getUTCMonth()+1) + "-" + date.getUTCDate() + " " +
hours + ":" + minutes;
};
PromConsole.TimeControl.prototype.setEndDate = function(date) {
this.setRefresh("Off");
this.endElement.value = this.getHumanDate(date);
this._setHash();
};
PromConsole.TimeControl.prototype.increaseEnd = function() {
// Increase duration 25% range & convert ms to s.
this.setEndDate(new Date(this.getOrSetEndDate() + this.parseDuration(this.durationElement.value) * 1000/4 ));
this.dispatch();
};
PromConsole.TimeControl.prototype.decreaseEnd = function() {
this.setEndDate(new Date(this.getOrSetEndDate() - this.parseDuration(this.durationElement.value) * 1000/4 ));
this.dispatch();
};
PromConsole.TimeControl.prototype.refresh = function() {
this.endElement.value = '';
this._setHash();
this.dispatch();
};
PromConsole.TimeControl.prototype.dispatch = function() {
var durationSeconds = this.parseDuration(this.durationElement.value);
var end = this.getEndDate();
if (end === null) {
end = new Date().getTime();
}
for (var i = 0; i< PromConsole._graph_registry.length; i++) {
var graph = PromConsole._graph_registry[i];
graph.params.duration = durationSeconds;
graph.params.endTime = end / 1000;
graph.dispatch();
}
};
PromConsole.TimeControl.prototype._refreshInterval = null;
PromConsole.TimeControl.prototype.setRefresh = function(duration) {
if (this._refreshInterval !== null) {
window.clearInterval(this._refreshInterval);
this._refreshInterval = null;
}
if (duration != "Off") {
if (this.endElement.value !== '') {
this.refresh();
}
var durationSeconds = this.parseDuration(duration);
this._refreshInterval = window.setInterval(this.dispatch.bind(this), durationSeconds * 1000);
}
this.refreshValueElement.textContent = duration;
};
// List of all graphs, used by time controls.
PromConsole._graph_registry = [];
PromConsole.graphDefaults = {
expr: null, // Expression to graph. Can be a list of strings.
node: null, // DOM node to place graph under.
// How long the graph is over, in seconds.
duration: PromConsole.TimeControl._initialValues.duration,
// The unixtime the graph ends at.
endTime: PromConsole.TimeControl._initialValues.endTime,
width: null, // Height of the graph div, excluding titles and legends.
// Defaults to auto-detection.
height: 200, // Height of the graph div, excluding titles and legends.
min: "auto", // Minimum Y-axis value, defaults to lowest data value.
max: undefined, // Maximum Y-axis value, defaults to highest data value.
renderer: 'line', // Type of graphs, options are 'line' and 'area'.
name: null, // What to call plots, defaults to trying to do
// something reasonable.
// If a string, it'll use that. [[ label ]] will be substituted.
// If a function it'll be called with a map of keys to values,
// and should return the name to use.
// Can be a list of strings/functions, each element
// will be applied to the plots from the corresponding
// element of the expr list.
xTitle: "Time", // The title of the x axis.
yUnits: "", // The units of the y axis.
yTitle: "", // The title of the y axis.
// Number formatter for y axis.
yAxisFormatter: PromConsole.NumberFormatter.humanize,
// Number formatter for y values hover detail.
yHoverFormatter: PromConsole.NumberFormatter.humanizeExact,
};
PromConsole.Graph = function(params) {
for (var k in PromConsole.graphDefaults) {
if (!(k in params)) {
params[k] = PromConsole.graphDefaults[k];
}
}
if (typeof params.expr == "string") {
params.expr = [params.expr];
}
if (typeof params.name == "string" || typeof params.name == "function") {
var name = [];
for (var i = 0; i < params.expr.length; i++) {
name.push(params.name);
}
params.name = name;
}
this.params = params;
this.rendered_data = null;
PromConsole._graph_registry.push(this);
/*
* Table layout:
* | yTitle | Graph |
* | | xTitle |
* | /graph | Legend |
*/
var table = document.createElement("table");
table.className = "prom_graph_table";
params.node.appendChild(table);
var tr = document.createElement("tr");
table.appendChild(tr);
var yTitleTd = document.createElement("td");
tr.appendChild(yTitleTd);
var yTitleDiv = document.createElement("td");
yTitleTd.appendChild(yTitleDiv);
yTitleDiv.className = "prom_graph_ytitle";
yTitleDiv.textContent = params.yTitle + (params.yUnits ? " (" + params.yUnits.trim() + ")" : "");
this.graphTd = document.createElement("td");
tr.appendChild(this.graphTd);
this.graphTd.className = "rickshaw_graph";
this.graphTd.width = params.width;
this.graphTd.height = params.height;
tr = document.createElement("tr");
table.appendChild(tr);
tr.appendChild(document.createElement("td"));
var xTitleTd = document.createElement("td");
tr.appendChild(xTitleTd);
xTitleTd.className = "prom_graph_xtitle";
xTitleTd.textContent = params.xTitle;
tr = document.createElement("tr");
table.appendChild(tr);
var graphLinkTd = document.createElement("td");
tr.appendChild(graphLinkTd);
var graphLinkA = document.createElement("a");
graphLinkTd.appendChild(graphLinkA);
graphLinkA.className = "prom_graph_link";
graphLinkA.textContent = "+";
graphLinkA.href = PromConsole._graphsToSlashGraphURL(params.expr);
var legendTd = document.createElement("td");
tr.appendChild(legendTd);
this.legendDiv = document.createElement("div");
legendTd.width = params.width;
legendTd.appendChild(this.legendDiv);
window.addEventListener('resize', function() {
if(this.rendered_data !== null) {
this._render(this.rendered_data);
}
}.bind(this));
this.dispatch();
};
PromConsole.Graph.prototype._parseValue = function(value) {
var val = parseFloat(value);
if (isNaN(val)) {
// "+Inf", "-Inf", "+Inf" will be parsed into NaN by parseFloat(). The
// can't be graphed, so show them as gaps (null).
return null;
}
return val;
};
PromConsole.Graph.prototype._escapeHTML = function(string) {
var entityMap = {
"&": "&amp;",
"<": "&lt;",
">": "&gt;",
'"': '&quot;',
"'": '&#39;',
"/": '&#x2F;'
};
return string.replace(/[&<>"'\/]/g, function (s) {
return entityMap[s];
});
};
PromConsole.Graph.prototype._render = function(data) {
var self = this;
var palette = new Rickshaw.Color.Palette();
var series = [];
// This will be used on resize.
this.rendered_data = data;
var nameFuncs = [];
if (this.params.name === null) {
var chooser = PromConsole._chooseNameFunction(data);
for (var i = 0; i < this.params.expr.length; i++) {
nameFuncs.push(chooser);
}
} else {
for (var i = 0; i < this.params.name.length; i++) {
if (typeof this.params.name[i] == "string") {
nameFuncs.push(function(i, metric) {
return PromConsole._interpolateName(this.params.name[i], metric);
}.bind(this, i));
} else {
nameFuncs.push(this.params.name[i]);
}
}
}
// Get the data into the right format.
var seriesLen = 0;
for (var e = 0; e < data.length; e++) {
for (var i = 0; i < data[e].data.result.length; i++) {
series[seriesLen++] = {
data: data[e].data.result[i].values.map(function(s) { return {x: s[0], y: self._parseValue(s[1])}; }),
color: palette.color(),
name: self._escapeHTML(nameFuncs[e](data[e].data.result[i].metric)),
};
}
}
this._clearGraph();
if (!series.length) {
var errorText = document.createElement("div");
errorText.className = 'prom_graph_error';
errorText.textContent = 'No timeseries returned';
this.graphTd.appendChild(errorText);
return;
}
// Render.
var graph = new Rickshaw.Graph({
interpolation: "linear",
width: this.graphTd.offsetWidth,
height: this.params.height,
element: this.graphTd,
renderer: this.params.renderer,
max: this.params.max,
min: this.params.min,
series: series
});
var hoverDetail = new Rickshaw.Graph.HoverDetail({
graph: graph,
onRender: function() {
var xLabel = this.element.getElementsByClassName("x_label")[0];
var item = this.element.getElementsByClassName("item")[0];
if (xLabel.offsetWidth + xLabel.offsetLeft + this.element.offsetLeft > graph.element.offsetWidth ||
item.offsetWidth + item.offsetLeft + this.element.offsetLeft > graph.element.offsetWidth) {
xLabel.classList.add("prom_graph_hover_flipped");
item.classList.add("prom_graph_hover_flipped");
} else {
xLabel.classList.remove("prom_graph_hover_flipped");
item.classList.remove("prom_graph_hover_flipped");
}
},
yFormatter: function(y) {
return this.params.yHoverFormatter(y) + this.params.yUnits;
}.bind(this)
});
var yAxis = new Rickshaw.Graph.Axis.Y({
graph: graph,
tickFormat: this.params.yAxisFormatter
});
var xAxis = new Rickshaw.Graph.Axis.Time({
graph: graph,
});
var legend = new Rickshaw.Graph.Legend({
graph: graph,
element: this.legendDiv
});
xAxis.render();
yAxis.render();
graph.render();
};
PromConsole.Graph.prototype._clearGraph = function() {
while (this.graphTd.lastChild) {
this.graphTd.removeChild(this.graphTd.lastChild);
}
while (this.legendDiv.lastChild) {
this.legendDiv.removeChild(this.legendDiv.lastChild);
}
};
PromConsole.Graph.prototype._xhrs = [];
PromConsole.Graph.prototype.dispatch = function() {
for (var j = 0; j < this._xhrs.length; j++) {
this._xhrs[j].abort();
}
var all_data = new Array(this.params.expr.length);
this._xhrs = new Array(this.params.expr.length);
var pending_requests = this.params.expr.length;
for (var i = 0; i < this.params.expr.length; ++i) {
var endTime = this.params.endTime;
var url = PATH_PREFIX + "/api/v1/query_range?query=" + encodeURIComponent(this.params.expr[i]) +
"&step=" + this.params.duration / this.graphTd.offsetWidth +
"&start=" + (endTime - 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;
if (typeof data !== "object") {
data = JSON.parse(xhr.responseText);
}
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 = PATH_PREFIX + '/static/img/ajax-loader.gif';
loadingImg.alt = 'Loading...';
loadingImg.className = 'prom_graph_loading';
this.graphTd.appendChild(loadingImg);
};
// Substitute 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].data.result.length; i++) {
for (var label in data[e].data.result[i].metric) {
if (!(label in labelValues)) {
labelValues[label] = {};
}
labelValues[label][data[e].data.result[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 PATH_PREFIX + '/graph#' + encodeURIComponent(JSON.stringify(data));
};
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