Container dashboard charts: send datapoints as full timestamps

[mzazrivec]

We need to send chart datapoints as complete timestamps (including timezone info) so that the patternfly component would correctly convert them to Date() objects and avoid ugly side-effects when viewing the charts in browsers located in different timezones.

How to reproduce:

1. Have Container provider with some utilization data collected, let's say your data is being collected every midnight in EST timezone.
2. Check the container provider dashboard in CEST timezone
3. Check the container provider dashboard in EST timezone: $ TZ='America/New_York' firefox

You'll notince the datapoints in the EST timezone are shifted by one day back.

Previously, we were sending the datapoints to the angular component as 2018-03-23 strings. The patternfly component would then convert them to Date() objects. Now we'll be sending the full timestamp as 2018-03-23T00:00:00.0000-04:00.

https://bugzilla.redhat.com/show_bug.cgi?id=1542720

@himdel review please?

[himdel]

This looks problematic.

It gives me "Sat, 15 Jul 2017 22:29:00 UTC +00:00" .. which is not guaranteed to be parseable in javascript IIRC

Should this be m.timestamp.strftime("%Y-%m-%dT%H:%M:%S%z")?

EDIT: never mind..

> m.timestamp
=> Sat, 15 Jul 2017 22:29:00 UTC +00:00
> m.timestamp.to_s
=> "2017-07-15 22:29:00 UTC"

[himdel]

@mzazrivec Looks like we will have to fix this differently.

The problem is that previously, all data points from one day were summed, so you'd get

2016-01-01: 42

but now, you'll get data more like:

2016-01-01T10:20:11: 2,
2016-01-01T12:24:11: 20,
2016-01-01T14:44:11: 10,
2016-01-01T17:04:11: 10,

which is not summed by day.

Also...

before:

after:

[himdel]

@mzazrivec Maybe we can do the same thing we do for hours?

hour = m.timestamp.beginning_of_hour.utc

so, something like date = m.timestamp.beginning_of_day.utc?

[himdel]

Using this diff instead:

diff --git a/app/services/container_dashboard_service.rb b/app/services/container_dashboard_service.rb
index d4bf6ac6c..2a95bf09b 100644
--- a/app/services/container_dashboard_service.rb
+++ b/app/services/container_dashboard_service.rb
@@ -233,7 +233,7 @@ class ContainerDashboardService < DashboardService
   def daily_image_metrics
     daily_image_metrics = Hash.new(0)
     daily_metrics.each do |m|
-      day = m.timestamp.strftime("%Y-%m-%d")
+      day = m.timestamp.beginning_of_day.utc
       daily_image_metrics[day] +=
         m.stat_container_image_registration_rate if m.stat_container_image_registration_rate.present?
     end
diff --git a/app/services/container_service_mixin.rb b/app/services/container_service_mixin.rb
index 8ee70b172..d9012e2e6 100644
--- a/app/services/container_service_mixin.rb
+++ b/app/services/container_service_mixin.rb
@@ -10,7 +10,7 @@ module ContainerServiceMixin
     daily_pod_delete_trend = Hash.new(0)
 
     daily_metrics.each do |m|
-      date = m.timestamp.strftime("%Y-%m-%d")
+      date = m.timestamp.beginning_of_day.utc
       fill_pod_metrics(m, date, daily_pod_create_trend, daily_pod_delete_trend)
     end
 
@@ -122,7 +122,7 @@ module ContainerServiceMixin
   def daily_network_metrics
     daily_network_metrics = Hash.new(0)
     daily_metrics.each do |m|
-      day = m.timestamp.strftime("%Y-%m-%d")
+      day = m.timestamp.beginning_of_day.utc
       daily_network_metrics[day] += m.net_usage_rate_average if m.net_usage_rate_average.present?
     end
 
@@ -179,7 +179,7 @@ module ContainerServiceMixin
     total_mem = Hash.new(0)
 
     daily_metrics.each do |metric|
-      date = metric.timestamp.strftime("%Y-%m-%d")
+      date = metric.timestamp.beginning_of_day.utc
       fill_utilization(metric, date, used_cpu, used_mem, total_cpu, total_mem)
     end
 

(but not yet sure this still fixes the BZ...) (seems it does, at least the screenshot is the same for TZ='America/New_York' firefox and TZ=UTC firefox)

[mzazrivec]

@himdel fixed as suggested.

[himdel]

double timestamp ;)

(otherwise, LGTM)

[mzazrivec]

fixed

[miq-bot]

Checked commits mzazrivec/manageiq-ui-classic@044b120~...35f2268 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
3 files checked, 0 offenses detected
Everything looks fine. 🍪

[simaishi]

Gaprindashvili backport details:

$ git log -1
commit f7016d9ba5a4cb7645318fb41dc317d35e3645ba
Author: Martin Hradil <himdel@seznam.cz>
Date:   Fri Apr 6 20:08:16 2018 +0200

    Merge pull request #3696 from mzazrivec/fix_datepoints_in_container_dashboard_charts
    
    Container dashboard charts: send datapoints as full timestamps
    (cherry picked from commit 43e677321cc7330a53e7cad749b388fc28590c21)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1565156

[simaishi]

Fine backport details:

$ git log -1
commit 4f0261dd6852c58989f6121e6535c1856f1e8b39
Author: Martin Hradil <himdel@seznam.cz>
Date:   Fri Apr 6 20:08:16 2018 +0200

    Merge pull request #3696 from mzazrivec/fix_datepoints_in_container_dashboard_charts
    
    Container dashboard charts: send datapoints as full timestamps
    (cherry picked from commit 43e677321cc7330a53e7cad749b388fc28590c21)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1565157