cli

• setup cli

  • get port

  • ssh

  • jenkins-cli.jar

  • jnlp

• execute groovy script via cli

  • ERROR: This command is requesting the -remoting mode which is no longer supported

  • solution

• execute groovysh

  • execute the script via https

• execute cil via kubectl

• man cli

references:

• Jenkins World 2017: Mastering the Jenkins Script Console

• Jenkins Area Meetup - Hacking on Jenkins Internals - Jenkins Script Console

• Write Groovy scripts for Jenkins with code completion

• Example Groovy scripts

• Jenkins Startup logs show builds migrated by the RunIdMigrator

• How to create a job using the REST API and cURL?

• Creating node with the REST API

setup cli

export JENKINS_DOMAIN=<jenkins.sample.com>

get port

$ curl -Lv https://${JENKINS_DOMAIN}/login 2>&1 | grep -i 'x-ssh-endpoint'
< x-ssh-endpoint: jenkins.sample.com:31232

$ k -n ci get svc jenkins-discovery -o yaml
apiVersion: v1
kind: Service
metadata:
  ...
spec:
  ports:
  - name: jenkins-agent
    nodePort: 3xxxx
    port: 50000
    protocol: TCP
    targetPort: jnlp-port
  - name: cli-agent
    nodePort: 32123
    port: 31232
    protocol: TCP
    targetPort: cli-port
  selector:
    app: jenkins
...

jenkins-cli-port

ssh

• Jenkins config

jenkins-cli-ssh

• ~/.ssh/config

$ cat ~/.ssh/config
Host  jenkins.sample.com
      User                marslo
      IdentityFile        ~/.ssh/marslo
      Port                32123

• using cli

$ ssh -q ${JENKINS_DOMAIN} help
  add-job-to-view
    Adds jobs to view.
  apply-configuration
    Apply YAML configuration to instance
  build
    Builds a job, and optionally waits until its completion.
  cancel-quiet-down
    Cancel the effect of the "quiet-down" command.
  channel-process
    Launch a new JVM on a slave and connect it with the master with remoting
  ...

• or

  $ ssh -l <user> -i <ssh-private-key> -p <port> ${JENKINS_DOMAIN} <command>
  
  # example
  $ ssh -l marslo -i ~/.ssh/marslo -p 32123 ${JENKINS_DOMAIN} help

jenkins-cli.jar

• get client (jenkins-cli.jar)

  $ curl -fsSL -O [-u<username>:<password>] https://${JENKINS_DOMAIN}/jnlpJars/jenkins-cli.jar
  
  # or
  $ curl -fsSL -O --netrc-file ~/.marslo/.netrc' https://${JENKINS_DOMAIN}/jnlpJars/jenkins-cli.jar
  $ cat ~/.marslo/.netrc
  machine <JENKINS_DOMAIN>
  login myaccount
  password mypassword

• use cli

  $ java -jar jenkins-cli.jar -auth <username>:<password> -s https://${JENKINS_DOMAIN} <command>
  
  # example
  $ java -jar jenkins-cli.jar -auth marslo:<MY-CLI-TOKEN> -s https://${JENKINS_DOMAIN} help
    add-job-to-view
      Adds jobs to view.
    apply-configuration
      Apply YAML configuration to instance
    build
      Builds a job, and optionally waits until its completion.
    cancel-quiet-down
      Cancel the effect of the "quiet-down" command.
    ...

handle -auth

• using directly in command line

  $ java -jar jenkins-cli.jar -auth marslo:<MY-CLI-TOKEN> -s https://${JENKINS_DOMAIN}

• using file

  $ echo 'marslo:<MY-CLI-TOKEN> ~/.marslo/.jenkins-cli'
  $ java -jar jenkins-cli.jar -auth @/Users/marslo/.marslo/.jenkins-cli -s https://${JENKINS_DOMAIN}

• using environment

  $ export JENKINS_USER_ID=marslo
  $ export JENKINS_API_TOKEN=<MY-CLI-TOKEN>
  $ java -jar jenkins-cli.jar -s https://${JENKINS_DOMAIN}

jnlp

[!NOTE|label:references:]

• How to find JNLP Node’s secret key remotely?

• Structure of the JNLP File

execute groovy script via cli

ERROR: This command is requesting the -remoting mode which is no longer supported

$ ssh -q <jenkins.domain.name> groovy <script.groovy>

solution

$ ssh -q <jenkins.domain.name> groovy = < /path/to/script.groovy

• i.e.:

  $ cat a.groovy
  println System.getProperties().sort().findAll{ it.key.contains('java') }.collect{ "${it.key} ~> ${it.value}" }.join('\n')
  
  $ ssh jenkins.example.com groovy =< ./a.groovy | head -4
  java.awt.graphicsenv ~> sun.awt.X11GraphicsEnvironment
  java.awt.headless ~> true
  java.awt.printerjob ~> sun.print.PSPrinterJob
  java.class.path ~> /usr/share/jenkins/jenkins.war
  ...

execute groovysh

$ ssh <jenkins.domina.name> groovysh
groovy:000> println System.getProperties().sort().collect{ "${it.key} ~> ${it.value}" }.join('\n')
awt.toolkit ~> sun.awt.X11.XToolkit
com.cloudbees.workflow.rest.external.ChangeSetExt.resolveCommitAuthors ~> true
executable-war ~> /usr/share/jenkins/jenkins.war
file.encoding ~> UTF-8
file.separator ~> /

execute the script via https

[!TIP|label:references:]

• Script Console

• imarslo : script console

A Jenkins Admin can execute groovy scripts remotely by sending an HTTP POST request to /script/ url or /scriptText/.

• format

  $ curl -d "script=<your_script_here>" https://jenkins/script
  
  # or to get output as a plain text result (no HTML)
  $ curl -d "script=<your_script_here>" https://jenkins/scriptText

• example : curl submitting groovy file via bash

  $ curl --data-urlencode "script=$(< ./somescript.groovy)" https://jenkins/scriptText
  
  # or
  $ curl --user 'username:api-token' --data-urlencode \
         "script=$(< ./somescript.groovy)" https://jenkins/scriptText

• example : Python submitting groovy file providing username and api token

  with open('somescript.groovy', 'r') as fd:
      data = fd.read()
  r = requests.post('https://jenkins/scriptText', auth=('username', 'api-token'), data={'script': data})

execute cil via kubectl

[!TIP|label:references:]

• Secrets handling in Kubernetes - A Jenkins story

$ kubectl exec -it po/jenkins-0 -c jenkins -- bash -c
    'echo \'println(hudson.util.Secret.fromString("test").getEncryptedValue())'
    | java -jar /var/jenkins_home/war/WEB-INF/lib/cli-2.303.1.jar
    s http://0.0.0.0:8080
    auth Admin:$(cat /run/secrets/chart-admin-password)
    groovy = '
{AQAAABAAAAAQGiN0B2weIsYfpg0LqBbM7WSBn9+zSBcH4OXyYpaVVig=}
$

man cli

CMD	DESCRIPTION
add-job-to-view	Adds jobs to view.
apply-configuration	Apply YAML configuration to instance
build	Builds a job, and optionally waits until its completion.
cancel-quiet-down	Cancel the effect of the "quiet-down" command.
check-configuration	Check YAML configuration to instance
clear-queue	Clears the build queue.
connect-node	Reconnect to a node(s)
console	Retrieves console output of a build.
copy-job	Copies a job.
create-credentials-by-xml	Create Credential by XML
create-credentials-domain-by-xml	Create Credentials Domain by XML
create-job	Creates a new job by reading stdin as a configuration XML file.
create-node	Creates a new node by reading stdin as a XML configuration.
create-view	Creates a new view by reading stdin as a XML configuration.
declarative-linter	Validate a Jenkinsfile containing a Declarative Pipeline
delete-builds	Deletes build record(s).
delete-credentials	Delete a Credential
delete-credentials-domain	Delete a Credentials Domain
delete-job	Deletes job(s).
delete-node	Deletes node(s)
delete-view	Deletes view(s).
disable-job	Disables a job.
disable-plugin	Disable one or more installed plugins.
disconnect-node	Disconnects from a node.
enable-job	Enables a job.
enable-plugin	Enables one or more installed plugins transitively.
export-configuration	Export jenkins configuration as YAML
get-credentials-as-xml	Get a Credentials as XML (secrets redacted)
get-credentials-domain-as-xml	Get a Credentials Domain as XML
get-gradle	List available gradle installations
get-job	Dumps the job definition XML to stdout.
get-node	Dumps the node definition XML to stdout.
get-view	Dumps the view definition XML to stdout.
groovy	Executes the specified Groovy script.
groovysh	Runs an interactive groovy shell.
help	Lists all the available commands or a detailed description of single command.
import-credentials-as-xml	Import credentials as XML. The output of "list-credentials-as-xml" can be used as input here as is, the only needed change is to set the actual Secrets which are redacted in the output.
install-plugin	Installs a plugin either from a file, an URL, or from update center.
keep-build	Mark the build to keep the build forever.
list-changes	Dumps the changelog for the specified build(s).
list-credentials	Lists the Credentials in a specific Store
list-credentials-as-xml	Export credentials as XML. The output of this command can be used as input for "import-credentials-as-xml" as is, the only needed change is to set the actual Secrets which are redacted in the output.
list-credentials-context-resolvers	List Credentials Context Resolvers
list-credentials-providers	List Credentials Providers
list-jobs	Lists all jobs in a specific view or item group.
list-plugins	Outputs a list of installed plugins.
mail	Reads stdin and sends that out as an e-mail.
offline-node	Stop using a node for performing builds temporarily, until the next "online-node" command.
online-node	Resume using a node for performing builds, to cancel out the earlier "offline-node" command.
quiet-down	Quiet down Jenkins, in preparation for a restart. Don’t start any builds.
reload-configuration	Discard all the loaded data in memory and reload everything from file system. Useful when you modified config files directly on disk.
reload-jcasc-configuration	Reload JCasC YAML configuration
reload-job	Reload job(s)
remove-job-from-view	Removes jobs from view.
replay-pipeline	Replay a Pipeline build with edited script taken from standard input
restart	Restart Jenkins.
restart-from-stage	Restart a completed Declarative Pipeline build from a given stage.
safe-restart	Safely restart Jenkins.
safe-shutdown	Puts Jenkins into the quiet mode, wait for existing builds to be completed, and then shut down Jenkins.
session-id	Outputs the session ID, which changes every time Jenkins restarts.
set-build-description	Sets the description of a build.
set-build-display-name	Sets the displayName of a build.
set-external-build-result	Set external monitor job result.
shutdown	Immediately shuts down Jenkins server.
stop-builds	Stop all running builds for job(s)
update-credentials-by-xml	Update Credentials by XML
update-credentials-domain-by-xml	Update Credentials Domain by XML
update-job	Updates the job definition XML from stdin. The opposite of the get-job command.
update-node	Updates the node definition XML from stdin. The opposite of the get-node command.
update-view	Updates the view definition XML from stdin. The opposite of the get-view command.
version	Outputs the current version.
wait-node-offline	Wait for a node to become offline.
wait-node-online	Wait for a node to become online.
who-am-i	Reports your credential and permissions.