Create Dockerfile to build Jenkins Docker Slaves

[infra/tools.git] / infra / jenkins / slave-setup / docker-slave / Dockerfile

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+# ============LICENSE_START=======================================================
+#  Copyright (C) 2019 The Nordix Foundation. All rights reserved.
+# ================================================================================
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+# ============LICENSE_END=========================================================
+
+#-------------------------------------------------------------------------------
+# This Dockerfile is used for building container images to
+# use as Jenkins Slaves for Nordix Infra. The image is configured
+# and tested for running
+#   - Jenkins Job Builder Verify and Merge jobs using tox
+#   - Cloud Infra Engine ansible-lint, yamllist, and shellcheck using tox
+#
+# The image built using this Dockerfile is currently being stored on Docker Hub
+# with the name nordixorg/infra-tools-docker-slave-ubuntu1804 which can be seen
+# using the link below.
+#   https://hub.docker.com/repository/docker/nordixorg/infra-tools-docker-slave-ubuntu1804
+# The images are automatically attached to Jenkins as slaves using Jenkins
+# Docker plugin with a name that looks like infra-ubuntu1804-<random_characters>
+#
+# In order to use this image as slave for your jobs, you need to use label
+# infra-tools-docker-slave-ubuntu1804 so Jenkins schedules your job on this slave
+# which gets provisioned by Jenkins Docker plugin. Please note that it takes few
+# seconds before the slave becomes ready and job starts running.
+#-------------------------------------------------------------------------------
+FROM jenkins/jnlp-slave
+USER root
+# we need few basic packages in order to use base image as Jenkins slave
+RUN apt update && apt install -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confnew -q=3 -y git vim sudo
+# we install system packages as part of Jenkins verify jobs so
+# jenkins user needs to be able to run sudo
+RUN usermod -aG sudo jenkins
+# without tty
+RUN sed -i "s/^Defaults.*env_reset/#&\nDefaults:jenkins  \!requiretty/" /etc/sudoers
+# and without password
+RUN sed -i "s/^%sudo.*ALL/%sudo  ALL=(ALL:ALL)   NOPASSWD: ALL/" /etc/sudoers
+# switch back to jenkins user
+USER jenkins
+# create slave_root folder same as what we use on regular slaves
+RUN mkdir -p /home/jenkins/nordix/slave_root