Jenkins Pipeline: Variable expansion issues

[Mike Craig]

Hello,

The following snippet from my pipeline is acting very strangely, the values from the print statements are correct

              print "asgName: $asgName"

             print "asgMax: $asgMax"

             print "asgMin: $asgMin"

             asgIncrease = (asgMax * 2)

             print "Setting ASG size to ${asgIncrease}"

             sh ("aws autoscaling update-auto-scaling-group --min-size ${asgMin} --max-size ${asgMax} --region ${region} --auto-scaling-group-name ${asgName} ")

output

15:27:13  ecs_service_name: lab-us-west-2-lab-rat
[Pipeline] sh
15:27:14  + aws autoscaling describe-auto-scaling-groups --region us-west-2
15:27:14  + jq .AutoScalingGroupName
15:27:14  + jq '.AutoScalingGroups[]'
15:27:14  + jq 'select (.AutoScalingGroupName | contains ("lab-us-west-2-lab-rat"))'
[Pipeline] sh
15:27:18  + aws autoscaling describe-auto-scaling-groups --region us-west-2
15:27:18  + jq 'select (.AutoScalingGroupName | contains ("lab-us-west-2-lab-rat"))'
15:27:18  + jq .MaxSize
15:27:18  + jq '.AutoScalingGroups[]'
[Pipeline] sh
15:27:22  + jq 'select (.AutoScalingGroupName | contains ("lab-us-west-2-lab-rat"))'
15:27:22  + jq .MinSize
15:27:22  + jq '.AutoScalingGroups[]'
15:27:22  + aws autoscaling describe-auto-scaling-groups --region us-west-2
[Pipeline] echo
15:27:26  asgName: "lab-us-west-2-lab-rat-serviceInstanceAutoscalingGroup"
15:27:26  
[Pipeline] echo
15:27:26  asgMax: 1
15:27:26  
[Pipeline] echo
15:27:26  asgMin: 1
15:27:26  
[Pipeline] echo
15:27:26  Setting ASG size to 1
15:27:26  1
15:27:26  
[Pipeline] sh
15:27:26  + aws autoscaling update-auto-scaling-group --min-size 1
15:27:27  usage: aws [options] <command> <subcommand> [<subcommand> ...] [parameters]
15:27:27  To see help text, you can run:
15:27:27  
15:27:27    aws help
15:27:27    aws <command> help
15:27:27    aws <command> <subcommand> help
15:27:27  aws: error: argument --auto-scaling-group-name is required

2 things here, 

1. the asgIncrease variable should evaluate to 2, as I'm doubling the original variable.  

2 The line where the "aws autoscaling" command is executed does not expand and execute the entire line. I have tried hardcoding values here, and that seems to work, but how to use variables??

What am I doing wrong?

Thank you!

 

[Reinhold Füreder]

Hi Mike,

 

it looks like the variables are actually strings with a line break at the end, and not integers?

 

HTH Reinhold

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[Mike Craig]

Good thinking, I'll try to do a strip on them and see if that clears it up.