# The MIT License # # Copyright (c) 2015, CloudBees, Inc. # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the “Software”), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE.
# take from https://github.com/cloudbees/jnlp-slave-with-java-build-tools-dockerfile/blob/master/jenkins-slave # assumed that these env vars are present on the kubernetes slave
if [[ $# -eq 1 ]]; then
# if `docker run` only has one arguments, we assume user is running alternate command like `bash` to inspect the image exec “$@”
# if -tunnel is not provided try env vars if [[ “$@” != *”-tunnel “* ]]; then if [[ ! -z “$JENKINS_TUNNEL” ]]; then TUNNEL=”-tunnel $JENKINS_TUNNEL” fi fi
if [[ ! -z “$JENKINS_URL” ]]; then URL=”-url $JENKINS_URL” fi
sed -i “s/blank/$(aws ssm get-parameters –region us-east-1 –with-decryption –names artifactory_password –query ‘Parameters.Value’ –output text )/” /etc/maven/settings.xml
As in Jenkins Docker Slave, every time a job runs, a new Docker container is started and terminated upon job completion. This will mean it will download all the dependencies every time. To avoid this, we will use the Volume function in Docker.
As we are using the Docker Plugin, there is a field to do this – Volumes.
In the example above, we map path /var/lib/jenkins/tools on the Slave machine to path /home/jenkins/tools in Docker container, and /home/jenkins/.m2 on Slave machine to /home/jenkins/.m2 on Docker container. We can specify the mode of Read/Write, Read-Only, etc, by default is Read/Write.
Therefore, all Jenkins tools and Maven dependencies will be stored on the host or Slave Machine every time Docker container runs and will not need to be downloaded upon next Docker container starts. So build time will be saved.