Details
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Bug
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Status: Closed (View Workflow)
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Minor
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Resolution: Fixed
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Jenkins 2.73.1, EC2 Plugin 1.37
Description
With the EC2 plugin version 1.37, existing stopped instances are not started again during provisioning with the following message in the Jenkins log when the instance cap is reached:
Cannot provision - no capacity for instances: -1
reverting to version 1.36 fixes the issue.
Attachments
Issue Links
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- Resolved
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- Closed
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Activity
Ryan Smith
added a comment - I upgraded from 1.36 to 1.38, and nodes stopped automatically launching. I was able to manually trigger node launches by going to Nodes and using the "Provision via" drop down.
Reading the note above from Ken Rachynski on 2017-11-24 12:38, I changed the EC2 ami configs from m3.large to m3.xlarge, saved, and then changed them back to m3.large, saved. And immediately following that instances started auto launching and taking work.
Ryan Smith
added a comment - I upgraded from 1.36 to 1.38, and nodes stopped automatically launching. I was able to manually trigger node launches by going to Nodes and using the "Provision via" drop down.
Reading the note above from Ken Rachynski on 2017-11-24 12:38, I changed the EC2 ami configs from m3.large to m3.xlarge, saved, and then changed them back to m3.large, saved. And immediately following that instances started auto launching and taking work. 
Francis Upton
added a comment - I see the problem here. This was caused by the "node" field that was added to the SlaveTemplate https://github.com/jenkinsci/ec2-plugin/pull/232. The initial value of "node" was set to "true", allowing it to be provisioned normally. However, any serialized SlaveTemplates would (incorrectly) have the value of "false" which caused them to be ignored during the normal provisioning. The work of the PR did not consider this case.
Francis Upton
added a comment - I see the problem here. This was caused by the "node" field that was added to the SlaveTemplate https://github.com/jenkinsci/ec2-plugin/pull/232 . The initial value of "node" was set to "true", allowing it to be provisioned normally. However, any serialized SlaveTemplates would (incorrectly) have the value of "false" which caused them to be ignored during the normal provisioning. The work of the PR did not consider this case.
Code changed in jenkins
User: Francis Upton IV
Path:
src/main/java/hudson/plugins/ec2/EC2Cloud.java
src/main/java/hudson/plugins/ec2/EC2Step.java
src/main/java/hudson/plugins/ec2/SlaveTemplate.java
src/test/java/hudson/plugins/ec2/EC2StepTest.java
http://jenkins-ci.org/commit/ec2-plugin/a80c336bfc12ee28828981bdceae88842daabb07
Log:
JENKINS-50105 EC2 Step provisioning incorrectly specifies a label
JENKINS-47130 EC2 plugin 1.37 fails to provision previously defined slaves
Code changed in jenkins
User: Francis Upton IV
Path:
src/main/java/hudson/plugins/ec2/EC2Cloud.java
src/main/java/hudson/plugins/ec2/EC2Step.java
src/main/java/hudson/plugins/ec2/SlaveTemplate.java
src/test/java/hudson/plugins/ec2/EC2StepTest.java
http://jenkins-ci.org/commit/ec2-plugin/affb7f407cd024accdf4e9093b07efada117814d
Log:
JENKINS-50105 EC2 Step provisioning incorrectly specifies a label (#268)
JENKINS-47130 EC2 plugin 1.37 fails to provision previously defined slaves
Further comment. I have a failing agent right now because the 'root command prefix' which I attempted to set as 'sudo' is not being saved in the configuration. It rather looks like I need to uninstall the entire thing and start over now.