Time of day loadbalance?

Question

Hi we have an LTM 9.4.7 and wanted to see if it was possible to do a scheduled loadbalance based on time of day? In other words we would not want to loadbalance to a certain leg (pool member) during certain times of the day(s). What would be the best way to address this in an iRule or not? Or is this even possible?

the_bhattman · Answer

Hi JC,    
&nbsp; I suppose it's possible.   The iRule code could look something like the following:  
&nbsp;   
&nbsp;     
 when HTTP_REQUEST { 
 set day "Thursday" 
 set starttime "2100" 
 set stoptime "2200" 
  
   Look for the current date of when the irule was processed 
   scan [clock format [clock seconds] -format { %A %H%M}] %s %s curday curtime  
    
   if {($day eq $curday) &amp;&amp; ($curtime &gt;= $starttime) &amp;&amp; ($curtime &lt;= $stoptime) } { 
            Code here will execute based on the day of time you want to execute this code 
      pool my_Pool member 10.1.2.200 80 
    } 
 }

&nbsp;  
&nbsp; I haven't testing this code out but I think it could be the bases of what you are looking for. 
&nbsp;  
&nbsp; I hope this helps    
&nbsp; CB

the_bhattman · Answer

There appears to be space between %s where there shouldn't be. 
&nbsp;  
&nbsp; Try the following: 
&nbsp;  
&nbsp;  
  when HTTP_REQUEST {  
  set day "Thursday"  
  set starttime "2100"  
  set stoptime "2200"  
  
    Look for the current date of when the irule was processed  
    scan [clock format [clock seconds] -format { %A %H%M}] %s%s curday curtime 
  
    if {($day eq $curday) &amp;&amp; ($curtime &gt;= $starttime) &amp;&amp; ($curtime &lt;= $stoptime) } {  
             Code here will execute based on the day of time you want to execute this code  
       pool my_Pool member 10.1.2.200 80  
     }  
  }  
  
&nbsp;  
&nbsp;  
&nbsp; CB &nbsp;

hoolio · Answer

Here are a few other related posts which may give you guys ideas: 
&nbsp;  
&nbsp; Time based rule 
&nbsp; http://devcentral.f5.com/Default.aspx?tabid=53&amp;forumid=5&amp;tpage=1&amp;view=topic&amp;postid=57946 
&nbsp;  
&nbsp; Scheduled Maintenance Window 
&nbsp; http://devcentral.f5.com/Default.aspx?tabid=53&amp;forumid=5&amp;tpage=1&amp;view=topic&amp;postid=29608 
&nbsp;  
&nbsp; Aaron

Forum Discussion

Time of day loadbalance?

3 Replies

Jonathan - March 2026 Featured Member

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