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Stats are now generated only when needed and at most every 10s.

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This commit is contained in:
Julien Fontanet 2013-10-03 14:23:44 +02:00
parent 9eb3973131
commit e703824198
2 changed files with 62 additions and 54 deletions
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54
src/api.js
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@ -531,59 +531,7 @@ Api.fn.server = {
// Extra methods not really bound to an object.
Api.fn.xo = {
'getStats': function () {
// @todo Keep up-to-date stats in this.xo to avoid unecessary
// (and possibly heavy) computing.
var xo = this.xo;
var xobjs = xo.xobjs;
return Q.all([
xobjs.host.get(),
xobjs.host_metrics.get().then(function (metrics) {
return _.indexBy(metrics, 'id');
}),
xobjs.VM.get({
'is_a_template': false,
'is_control_domain': false,
}),
xobjs.VM_metrics.get().then(function (metrics) {
return _.indexBy(metrics, 'id');
}),
xobjs.SR.count(),
]).spread(function (hosts, host_metrics, vms, vms_metrics, n_srs) {
var running_vms = _.where(vms, {
'power_state': 'Running',
});
var n_cpus = 0;
var total_memory = 0;
_.each(hosts, function (host) {
n_cpus += host.host_CPUs.length;
total_memory += +host_metrics[host.metrics].memory_total;
});
var n_vifs = 0;
var n_vcpus = 0;
var used_memory = 0;
_.each(vms, function (vm) {
var metrics = vms_metrics[vm.metrics];
n_vifs += vm.VIFs.length;
n_vcpus += +metrics.VCPUs_number;
used_memory += +metrics.memory_actual;
});
return {
'hosts': hosts.length,
'vms': vms.length,
'running_vms': running_vms.length,
'used_memory': used_memory,
'total_memory': total_memory,
'vcpus': n_vcpus,
'cpus': n_cpus,
'vifs': n_vifs,
'srs': n_srs,
};
});
return this.xo.stats;
},
'getSessionId': function (req) {

62
src/xo.js
View File

@ -165,10 +165,67 @@ function Xo()
}
// Connections to Xen pools/servers.
this.connections = {};
//this.connections = {};
// We will keep up-to-date stats in this object
this.stats = {};
}
require('util').inherits(Xo, require('events').EventEmitter);
Xo.prototype.computeStats = _.throttle(function () {
var xo = this;
var xobjs = xo.xobjs;
return Q.all([
xobjs.host.get(),
xobjs.host_metrics.get().then(function (metrics) {
return _.indexBy(metrics, 'id');
}),
xobjs.VM.get({
'is_a_template': false,
'is_control_domain': false,
}),
xobjs.VM_metrics.get().then(function (metrics) {
return _.indexBy(metrics, 'id');
}),
xobjs.SR.count(),
]).spread(function (hosts, host_metrics, vms, vms_metrics, n_srs) {
var running_vms = _.where(vms, {
'power_state': 'Running',
});
var n_cpus = 0;
var total_memory = 0;
_.each(hosts, function (host) {
n_cpus += host.host_CPUs.length;
total_memory += +host_metrics[host.metrics].memory_total;
});
var n_vifs = 0;
var n_vcpus = 0;
var used_memory = 0;
_.each(vms, function (vm) {
var metrics = vms_metrics[vm.metrics];
n_vifs += vm.VIFs.length;
n_vcpus += +metrics.VCPUs_number;
used_memory += +metrics.memory_actual;
});
xo.stats = {
'hosts': hosts.length,
'vms': vms.length,
'running_vms': running_vms.length,
'used_memory': used_memory,
'total_memory': total_memory,
'vcpus': n_vcpus,
'cpus': n_cpus,
'vifs': n_vifs,
'srs': n_srs,
};
});
}, 5000);
Xo.prototype.start = function (cfg) {
var xo = this;
var redis = require('then-redis').createClient(cfg.get('redis', 'uri'));
@ -255,6 +312,7 @@ Xo.prototype.start = function (cfg) {
});
});
})).then(function () {
xo.computeStats();
return xapi.call('event.register', ['*']);
}).then(function () {
return function loop() {
@ -270,6 +328,8 @@ Xo.prototype.start = function (cfg) {
// @todo Handle operation types.
collection.add(event.snapshot, {'replace': true});
xo.computeStats();
}
return loop();