Referencing Environment Variable in Serverless.yml File from jenkinsfile - amazon-web-services

Question

I am trying to reference variables that are set in my jenkinsfile in my serverless.yml file.
In jenkinsfile i have this
environment {
HELLO = 'hello-world'
}
In serverless.yml file i have this
custom:
secret: ${env:HELLO}
When running jenkins pipeline i get this error
A valid environment variable to satisfy the declaration 'env:HELLO' could not be found.
Here is my full jenkins file as requested, end goal i want to use val1 and val2 and env variables but if i can figure out how to to with hello world it is the same thing.
import com.lmig.intl.cloud.jenkins.exception.BuildException
def getJobName() {
return env.JOB_NAME
}
environment {
HELLO = 'hello-world'
}
def getEnvironment() {
def jobName = getJobName().split('/')
def environment = jobName[1].toLowerCase()
return environment.toLowerCase()
}
node('linux'){
stage('Checkout'){
checkout scm
}
stage('Pull Secrets From Vault'){
withAWS(credentials:'aws-cred'){
def secret = vaultPullSecrets(app:"sls-auxiliary-service",appenv:"nonprod",runtime:'nonprod',keys:'["saslusername","saslpassword"]')
def val1 = new groovy.json.JsonSlurper().parseText(secret)[0].SASLUSERNAME
def val2 = new groovy.json.JsonSlurper().parseText(secret)[1].SASLPASSWORD
if(val1 != '' && val2 != ''){
echo "Vault Secret pulled Successfully"
}else{
echo "Vault Secret Not Found"
throw new BuildException("Vault Secret Not Found")
}
}
}
stage('Deploy') {
def ENVIRONMENT = getEnvironment().replaceAll("\\_","")
withAWS(credentials:'aws-cred') {
sh 'npm i serverless-python-requirements'
sh 'npm install --save-dev serverless-step-functions'
sh 'npm install serverless-deployment-bucket --save-dev'
sh 'npm i serverless-pseudo-parameters'
sh 'npm i serverless-plugin-resource-tagging'
sh 'pip3 install --user -r requirements.txt'
sh "serverless deploy --stage ${ENVIRONMENT}"
}
}
}

Answer 1

You can use sed to replace the placeholder: ${env:HELLO}to real value, if you can make jenkin job always be executed on Linux slave.
stage('Pull Secrets From Vault'){
withAWS(credentials:'aws-cred'){
def secret = vaultPullSecrets(app:"sls-auxiliary-service",appenv:"nonprod",runtime:'nonprod',keys:'["saslusername","saslpassword"]')
def val1 = new groovy.json.JsonSlurper().parseText(secret)[0].SASLUSERNAME
sh """
sed -i 's/\${env:HELLO}/${val1}/' <relative path to>/serverless.yml
"""
I did a quick practice with a simple pipeline as following, the sed command I give work well.
node('docker') {
stage('A') {
sh '''
set +x
echo 'custom:' > serverless.yml
echo ' secret: ${env:HELLO}' >> serverless.yml
echo '### Before replace ###'
cat serverless.yml
'''
def val1 = 'hello'
sh """
set +x
sed -i 's/\${env:HELLO}/${val1}/' ./serverless.yml
echo '### After replace ###'
cat serverless.yml
"""
}
}
Output of job build
[script-pipeline-practice] Running shell script
+ set +x
### Before replace ###
custom:
secret: ${env:HELLO}
[Pipeline] sh
[script-pipeline-practice] Running shell script
+ set +x
### After replace ###
custom:
secret: hello