Set up dockerfile for jenkins-worker container image

docker/build/jenkins_worker/Dockerfile

+# To build this Dockerfile:
+#
+# From the root of configuration:
+#
+# docker build -f docker/build/jenkins_worker/Dockerfile .
+#
+# This allows the dockerfile to update /edx/app/edx_ansible/edx_ansible
+# with the currently checked-out configuration repo.
+
+# Run the edxapp play with custom ansible overrides
+ARG BASE_IMAGE_TAG=latest
+FROM edxops/xenial-common:${BASE_IMAGE_TAG}
+MAINTAINER edxops
+USER root
+
+ADD . /edx/app/edx_ansible/edx_ansible
+WORKDIR /edx/app/edx_ansible/edx_ansible/docker/plays
+
+COPY docker/build/jenkins_worker/ansible_overrides.yml /jenkins_worker/ansible_overrides.yml
+COPY docker/build/edxapp/devstack.yml /
+COPY docker/build/devstack/ansible_overrides.yml /devstack/ansible_overrides.yml
+
+ARG OPENEDX_RELEASE=master
+ENV OPENEDX_RELEASE=${OPENEDX_RELEASE}
+RUN sudo /edx/app/edx_ansible/venvs/edx_ansible/bin/ansible-playbook edxapp.yml \
+    -c local -i '127.0.0.1,' \
+    -t 'install,assets,devstack,jenkins-worker' \
+    --extra-vars="edx_platform_version=${OPENEDX_RELEASE}" \
+    --extra-vars="@/jenkins_worker/ansible_overrides.yml" \
+    --extra-vars="@/devstack.yml" \
+    --extra-vars="@/devstack/ansible_overrides.yml"
+
+# Run the mongo play
+COPY docker/build/mongo/ansible_overrides.yml /mongo/ansible_overrides.yml
+
+RUN mkdir -p /data/db
+WORKDIR /edx/app/edx_ansible/edx_ansible/docker/plays
+RUN /edx/app/edx_ansible/venvs/edx_ansible/bin/ansible-playbook mongo.yml \
+    -i '127.0.0.1,' -c local \
+    -t 'install' \
+    --extra-vars="@/mongo/ansible_overrides.yml"
+
+# Add sshd to enable jenkins master to ssh into containers
+RUN apt-get update \
+  && apt-get install -y openssh-server \
+  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+ARG JENKINS_WORKER_KEY_URL=https://files.edx.org/testeng/jenkins.keys
+RUN mkdir /var/run/sshd \
+  && groupadd ubuntu \
+  && useradd -ms /bin/bash ubuntu -g ubuntu -d /home/ubuntu \
+  && curl ${JENKINS_WORKER_KEY_URL} --create-dirs -o /home/ubuntu/.ssh/authorized_keys
+
+RUN chown -R ubuntu /home/ubuntu
+RUN chown ubuntu /edx/app/edxapp/edx-platform
+CMD ["/edx/app/supervisor/venvs/supervisor/bin/supervisord", "-n", "--configuration", "/edx/app/supervisor/supervisord.conf"]
+
+EXPOSE 22

docker/build/jenkins_worker/ansible_overrides.yml

+---
+EDXAPP_SETTINGS: 'devstack_docker'
+
+MONGO_AUTH: false
+
+devstack: true
+migrate_db: false
+mongo_enable_journal: false
+edxapp_npm_production: "no"
+
+EDXAPP_LMS_GUNICORN_EXTRA_CONF: 'reload = True'
+
+EDXAPP_NO_PREREQ_INSTALL: 0
+EDXAPP_OAUTH_ENFORCE_SECURE: false
+EDXAPP_LMS_BASE_SCHEME: http
+COMMON_SECURITY_UPDATES: true
+SECURITY_UPGRADE_ON_ANSIBLE: true
+
+EDXAPP_INSTALL_PRIVATE_REQUIREMENTS: true
+
+EDXAPP_PYTHON_SANDBOX: false
+
+edxapp_debian_pkgs_extra:
+  - mongodb-clients

playbooks/roles/edxapp/tasks/service_variant_config.yml

@@ -66,6 +66,40 @@
     - install
     - install:configuration
 
+# write the supervisor script for mongod and sshd
+# this should only be run when provisioning a jenkins-worker container
+- name: Set ignore_jenkins_worker_command when no tags present
+  set_fact: ignore_jenkins_worker_command=true
+
+- name: writing mongod and sshd supervisor scripts
+  template:
+    src: "edx/app/supervisor/conf.d.available/{{ item }}.j2"
+    dest: "{{ supervisor_available_dir }}/{{ item }}"
+    owner: "{{ supervisor_user }}"
+    group: "{{ supervisor_user }}"
+    mode: 0644
+  become_user: "{{ supervisor_user }}"
+  with_items:
+    - mongod.conf
+    - sshd.conf
+  when: 'ignore_jenkins_worker_command is not defined'
+  tags:
+    - jenkins-worker
+
+- name: "enable mongod and sshd supervisor script"
+  file:
+    src: "{{ supervisor_available_dir }}/{{ item }}.conf"
+    dest: "{{ supervisor_cfg_dir }}/{{ item }}.conf"
+    state: link
+    force: yes
+  become_user: "{{ supervisor_user }}"
+  with_items:
+    - mongod
+    - sshd
+  when: 'ignore_jenkins_worker_command is not defined'
+  tags:
+    - jenkins-worker
+
 # Enable the supervisor jobs
 - name: "enable {{ item }} supervisor script"
   file:

playbooks/roles/edxapp/templates/edx/app/supervisor/conf.d.available/mongod.conf.j2

+[program:mongod]
+command=mongod --smallfiles --nojournal --storageEngine wiredTiger
+stdout_logfile={{ supervisor_log_dir }}/%(program_name)s-stdout.log
+stderr_logfile={{ supervisor_log_dir }}/%(program_name)s-stderr.log
+autorestart=true

playbooks/roles/edxapp/templates/edx/app/supervisor/conf.d.available/sshd.conf.j2

+[program:sshd]
+command=/usr/sbin/sshd -D
+stdout_logfile={{ supervisor_log_dir }}/%(program_name)s-stdout.log
+stderr_logfile={{ supervisor_log_dir }}/%(program_name)s-stderr.log
+autorestart=true

util/parsefiles_config.yml

@@ -32,6 +32,7 @@ weights:
   - mongo: 1
   - devpi: 1
   - jenkins_build: 8
+  - jenkins_worker: 22
   - analytics_pipeline: 8
   - analytics_pipeline_hadoop_datanode: 2
   - analytics_pipeline_hadoop_namenode: 3