Im trying to calculate uptime in Grafana based on the successful responses from Prometheus blackbox exporter

I've tried counting the number of probe_success and multiplying it by the probe interval trying to get uptime in seconds and setting the value type to the total. the issue is the minimum step changes as the time frame changes not giving us a correct reading and nulling this option. What we are actually trying to do is get the percentage uptime based on successful probes in the time frame set for the dashboard. We are using singlestat to show the percentage

(probe_success{instance="www.google.com:443",job="clienttest"})*15

We tried dividing the value by an exporter its self to try to get a percentage that would also scale to no avail.

sum(probe_success{instance="www.google.com:443",job="clienttest"}) / sum(probe_success{instance="self",job="clienttest"}) *100

Solved

For a singlestat panel what you want to do is use just probe_success{instance="www.google.com:443",job="clienttest"} as the expression, and under options make sure you are using the Average aggregation.

On the PromQL side you can also do avg_over_time(probe_success[1h]), see this blog post.

Escape sequence in subject line emails - malicious?

CentOS release 6.9 Exim version 4.89_1

I was running the excellent tool ecpp_2.pl - Version: 20150612 by Michael Karr which scans a server for all outbound emails from all programs and identifies suspicious entries - it's a great tool for quickly getting an overview of what's up with outbound emails if have some suspicious alerts.

One of the entries - which referenced a submission form on the server itself - had in the subject line a long string of escape sequence characters such as: \320\232\320\ and similar.

I hesitate to copy and paste the entire long entry here, but is there a method to determine what this code is and if it did any harm?

XDocument - Iterating Over XML Elements

Given an example XML file as such:

How would one iterate through each library and get only its children? E.g. if I was in the first library element and I went to retrieve all its descendants/children, it would only return with the two books inside it.

I've tried iterating and using XElement.Elements("book"), XElement.Elements(), XElement.Descendants(), etc. but all return every element that is a book (so it would pull the elements from the second library, too). Mostly I think I'm just struggling with understanding how XDocument keeps track of its elements and what's considered a descendant/child.

If possible, if one could explain as to how this would be done with XDocument for an element at any level it'd be appreciated (e.g. if each book had child elements, and if those elements had child elements, etc).

Solved

You can iterate over your XML by going through all the descendents of libraries in the following way.

  XDocument doc=XDocument.Load(XmlPath);
  foreach (var item in doc.Descendants("library"))
  IEnumerable nodes = item.DescendantNodes();//Here you got book nodes within a library

Sheer,

The problem is you are pulling all elements with "book".

If you want to get only items dependant on the parent element, you will have to supply a proper condition.

 var v = from n in doc.Descendants("library")
                where n.Attribute("name").Value == "some library"
                select n.DescendantNodes();

Now, this will give you element who's name is "some library".

Text going over navbar

I have a vertical navbar which serves as a menu in my asp.net MVC5 project. In a css stylesheet I defined it's position:fixed; to be able to see it all the time. On the other part of my web page I have a partial view that changes according to menu selection. My problem is that when the partial view is too large, when I horizontally scroll to see what's missing, the text overlaps with the navbar.

Here is a sample from my navbar in a file called _Menu.cshtml:

    

        

            
            Sidebar menu
        

        
            

                

                    
                         Documentation 
                    
                    

                        

                            
Documentation 1.1
                            
Documentation 1.2
                            
Documentation 1.3
                        
                    

                
            
        
    

In the _Layout.cshtml, I have the following inside of tag :

     

         

               @Html.Partial("~/Views/PartialViews/_Menu.cshtml")
         

         
               @RenderBody()
         

    

Finally the css:

.sidebar-nav{
     position: fixed; //Center works but then my navbar is not fixed anymore!
}

I use bootstrap to separate both parts of my page, hence having the menu on the left, and the body (or partial views of menu links) on the right. I know that making the navbar position different will solve the problem. But I'd like to have a fixed navbar, that would not be fixed horizontally OR have the text on the right part of my page go behind the navbar. Any ideas on how to do this?

Here's what it looks like (note the IpAdress doesn't show, so page isn't filled really, and please admire my drawing skills :p)