When trying to install a plugin with the Jenkins CLI and providing a URL as argument, the proxy configuration of the Jenkins master does not seem to be taken into account.

For example if I use the following command:

java -jar jenkins-cli.jar -logger FINE -s https://my.jenkinsexample.com -noCertificateCheck -auth myUser:myPassword install-plugin https://jenkins-updates.cloudbees.com/download/plugins/cloudbees-aws-cli/1.5.9/cloudbees-aws-cli.hpi

But requires to be behind an HTTP proxy to be able to download that plugin, it fails with:

ERROR: Unexpected exception occurred while performing install-plugin command. 
java.net.ConnectException: Connection timed out 

Even if I have a proxy configured under *Manage Jenkins > Manage Plugins > Advanced*.

Evidence

• https://github.com/jenkinsci/jenkins/blob/jenkins-2.176.1/core/src/main/java/hudson/cli/InstallPluginCommand.java#L100-L122
• https://github.com/jenkinsci/jenkins/blob/jenkins-2.176.1/core/src/main/java/hudson/FilePath.java#L965-L976

Workaround

Only workaround seem to be to set the proxy via system properties on the master:

-Dhttps.proxyHost=myproxy.server.com
-Dhttps.proxyPort=8080
-Dhttps.proxyUser=myUser
-Dhttp.proxyPassword=myPassword