Forum Discussion

Stuart_Myers_88's avatar
Stuart_Myers_88
Icon for Nimbostratus rankNimbostratus
Dec 08, 2009

GTM Pool Redirect based on time

This Works with HTTP_REQUEST, but when i try to use the same thing with DNS_REQUEST, i get:

01070151:3: Rule [redirect] error:

line 1: [undefined procedure:

($cur_time <= $maintenance_end_time) ] [{

($cur_time <= $maintenance_end_time) }

{pool STG_Training}]

line 5: [undefined procedure: },] [}, ]

line 6: [parse error: extra characters after close-quote] [) }]

Here is the Rule:
when DNS_REQUEST {   
      
   Change the following to set schedule   
      set maintenance_start_day "Saturday";  
      set maintenance_start_time "0000";   
      set maintenance_add_day_1 "Sunday";  
      set maintenance_add_day_2 "";  
      set maintenance_add_day_3 "";  
      set maintenance_add_day_4 "";  
      set maintenance_add_day_5 "";  
      set maintenance_end_day "Monday";   
      set maintenance_end_time "0400";  
    
    
      
   Get time in seconds, formatted as day of week (%A) hour (%k) minute (%M)   
   Use scan to save output as $cur_day $cur_hour $cur_minute   
      scan [clock format [clock seconds] -format {%A %k %M}] {%s %d %d} cur_day cur_hour cur_minute   
      set cur_time ${cur_hour}${cur_minute}   
      
      log local0. "\$cur_day: $cur_day, \$cur_hour: $cur_hour, \$cur_minute: $cur_minute, \$cur_time: $cur_time"   
      
      if { ($cur_day eq $maintenance_start_day) &&   
         ($cur_time >= $maintenance_start_time) &&   
         ($cur_time <= "2400") }  
  {pool STG_Training}    
      if { ($cur_day eq $maintenance_add_day_1) }  
  {pool STG_Training}  
      if { ($cur_day eq $maintenance_add_day_2) }  
  {pool STG_Training}  
      if { ($cur_day eq $maintenance_add_day_3) }  
  {pool STG_Training}  
      if { ($cur_day eq $maintenance_add_day_4) }  
  {pool STG_Training}  
      if { ($cur_day eq $maintenance_add_day_5) }  
  {pool STG_Training}  
      if { ($cur_day eq $maintenance_end_day) &&   
         ($cur_time >= "0000") &&   
         ($cur_time <= $maintenance_end_time) }  
  {pool STG_Training}  
    
   }

Anybody know if i can make this work?
application delivery
dev
devops
iRules
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Dec 08, 2009
    I think it's just an issue with not escaping line breaks in your if statement: 

      
  when DNS_REQUEST {  
    
      Change the following to set schedule  
     set maintenance_start_day "Saturday";  
     set maintenance_start_time "0000"; 
     set maintenance_add_day_1 "Sunday";  
     set maintenance_add_day_2 "";  
     set maintenance_add_day_3 "";  
     set maintenance_add_day_4 "";  
     set maintenance_add_day_5 "";  
     set maintenance_end_day "Monday";  
     set maintenance_end_time "0400";  
    
      Get time in seconds, formatted as day of week (%A) hour (%k) minute (%M)  
      Use scan to save output as $cur_day $cur_hour $cur_minute  
     scan [clock format [clock seconds] -format {%A %k %M}] {%s %d %d} cur_day cur_hour cur_minute  
     set cur_time ${cur_hour}${cur_minute}  
    
     log local0. "\$cur_day: $cur_day, \$cur_hour: $cur_hour, \$cur_minute: $cur_minute, \$cur_time: $cur_time"  
    
     if { ($cur_day eq $maintenance_start_day) && \ 
        ($cur_time > $maintenance_start_time) && \ 
        ($cur_time < "2400") }{  
           pool STG_Training  
     }  
     ...

    Also, it would probably make sense to add a switch statement (Click here) to check $cur_day instead of using 5 if statements that would all be run where only one could be true.

    Aaron
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Dec 10, 2009
    I think the GTM iRule parser is different than the LTM iRule parser. Make sure to remove any trailing spaces after the backslashes in the $cur_day and $cur_time checks. Also, I had to remove the = from >= and <= to get the rule to load for GTM. I edited the post above with these changes. Can you give that a try?

     

     

    Thanks,

     

    Aaron