Details
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Bug
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Status: Reopened (View Workflow)
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Major
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Resolution: Unresolved
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Jenkins ver. 1.623
plugin version 1.29
Description
When the build queue piles up new instances are launched. One per waiting job, it seems. I've attached a screenshot of my configuration. The instance cap per AMI doesn't have any effect either.
I believe this may be related to spot instances not coming up with the Jenkins slave tags, and so not being counted correctly. Though the global cap should apply to the overall number of running instances, no?
Attachments
Activity
A B
added a comment - Our instance cap is set to 1, but seems to be completely ignored. Not uncommon for 10 instances to be launched simultaneously. Is there anything required in our EC2 environment / AMI in order for the instance cap to be respected?
A B
added a comment - Our instance cap is set to 1, but seems to be completely ignored. Not uncommon for 10 instances to be launched simultaneously. Is there anything required in our EC2 environment / AMI in order for the instance cap to be respected? Code changed in jenkins
User: Francis Upton IV
Path:
src/main/java/hudson/plugins/ec2/EC2Cloud.java
http://jenkins-ci.org/commit/ec2-plugin/848fec3b9a473386173a7faabae25ef911d54b36
Log:
JENKINS-29851 Global instance cap not calculated for spot instances correctly (fixed NPE)
Code changed in jenkins
User: Francis Upton IV
Path:
src/main/java/hudson/plugins/ec2/EC2Cloud.java
src/main/java/hudson/plugins/ec2/EC2SpotSlave.java
src/main/java/hudson/plugins/ec2/SlaveTemplate.java
http://jenkins-ci.org/commit/ec2-plugin/f85b37b8f3ace611191c8b3507d03dcbda999a55
Log:
JENKINS-29851 Global instance cap not calculated for spot instances correctly
JENKINS-32397 Spot instance AMI counting has problems
JENKINS-32398 Remove spot instance nodes when requests are canceled
Francis Upton
added a comment - s/b resolved in 1.30 
Our workaround is to manually launch instances before sending the jobs to Jenkins. This is a luxury we have, based on our configuration, that others may not have. But I wanted to share it anyway.
If the instances are already idle (or in use) then the instance cap is respected and additional slaves are not initiated. It suggests to me that, when inspecting the instance cap, instances that are currently booting up are being ignored.