If you will want to add Jenkins S3 plugin (or any other plugin) to your Jenkins Configuration as Code deployment you may hit problem that the plugin cannot be configured easily using YAML.
In such case you can go with groovy init script.
Just add them to your values.yaml, for example:
# List of groovy init scripts to be executed during Jenkins master start
initScripts:
# - |
# print 'adding global pipeline libraries, register properties, bootstrap jobs...'
s3: |
import jenkins.model.*
import hudson.plugins.s3.*
instance = Jenkins.instance
new_name = "s3"
accessKey = "access"
secretKey = "secret"
useRole = false
S3Profile profile = new S3Profile(new_name, accessKey, secretKey, useRole, 60, "", "", "", "", false);
publisher = hudson.plugins.s3.S3BucketPublisher
des = new hudson.plugins.s3.S3BucketPublisher.DescriptorImpl();
s3Plugin = instance.getDescriptor(S3BucketPublisher.class);
new_profiles = [];
des.getProfiles().each { if (it.name != new_name) { new_profiles.push(it) } }
new_profiles.push(profile)
Follow up: