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Feature #4326

Frontend in HA mode

Added by Igor Sfiligoi over 6 years ago. Updated almost 5 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Parag Mhashilkar
Category:
Frontend
Target version:
Start date:
07/12/2013
Due date:
% Done:

0%

Estimated time:
Stakeholders:

CMS

Duration:

Description

The current FE does not really have a High Availability (HA) mode.

Sure, you can run two in parallel, and if one goes down, the glideins will still be coming in.
However, while both are running, the amount of glideins requested is doubled.

My proposal is to add a "slave mode" to the FE;
in this mode, the FE looks at the factory collectors, and looks for the ads of the master.
Only if it finds none, it advertises its own classads with the glidein requests.
(The master does not need to be aware of the slave)

History

#1 Updated by Igor Sfiligoi over 6 years ago

The main limitation of my proposal is that you can only have one slave.

However, I think this is not a major problem, so I would stay with this course of action to keep it simple.

#2 Updated by Burt Holzman over 6 years ago

  • Subject changed from Fronend in HA mode to Frontend in HA mode
  • Status changed from New to Assigned
  • Assignee changed from Parag Mhashilkar to Burt Holzman
  • Target version set to v3_x

We'll discuss the approach and design after the push to 3.1 is done.

#3 Updated by Burt Holzman over 6 years ago

  • Target version changed from v3_x to v3_2_x

#4 Updated by Parag Mhashilkar about 5 years ago

  • Assignee changed from Burt Holzman to Parag Mhashilkar
  • Target version changed from v3_2_x to v3_2_9

#5 Updated by Parag Mhashilkar about 5 years ago

  • Stakeholders updated (diff)

#6 Updated by Parag Mhashilkar about 5 years ago

  • Status changed from Assigned to Feedback
  • Assignee changed from Parag Mhashilkar to Marco Mambelli

Changes are in v3/4326. Please review.

#7 Updated by Marco Mambelli about 5 years ago

  • Assignee changed from Marco Mambelli to Parag Mhashilkar

sent feedback via email

#8 Updated by Parag Mhashilkar about 5 years ago

  • Status changed from Feedback to Resolved

fixed, merged to branch_v3_2 and master

#9 Updated by Parag Mhashilkar almost 5 years ago

  • Assignee changed from Parag Mhashilkar to Marco Mambelli

#10 Updated by Parag Mhashilkar almost 5 years ago

  • Assignee changed from Marco Mambelli to Parag Mhashilkar

#11 Updated by Parag Mhashilkar almost 5 years ago

  • Status changed from Resolved to Closed


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