[DCOS_OSS-1599] DNS failure during upgrade Created: 29/Aug/17  Updated: 09/Nov/18  Resolved: 10/Sep/17

Status: Resolved
Project: DC/OS
Component/s: networking
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Medium
Reporter: Senthil Kumaran (Inactive) Assignee: Deepak Goel
Resolution: Duplicate  
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
relates to DCOS_OSS-1065 Test 'marathon_app_tasks_survive_upgr... Resolved
relates to DCOS_OSS-1208 TestUpgrade.test_app_dns_survive is c... Resolved


During upgrade to 1.10 there is a brief moment when the DNS resolution will not work.

If health-check happens during that moment, it will be a failure, and thus we will see  apps reported unhealthy during upgrade (whenever DNS failover happens).

We have tests to test this feature. But this has been disabled for a long time now - 

[TestUpgrade.test_app_dns_survive (test_upgrade)

TeamCity Link 

As per Deepak Goel The DNS survival is not implemented yet: https://mesosphere.slack.com/archives/C0L6U3ECQ/p1503011609000296 


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