Prepare cluster nodes (Ubuntu 14.04) for Cloudera installation.

cluster_setup.yml

---
# cluster_setup.yml
# to run: ansible-playbook ~/cluster_setup.yaml -u awoolford -k --ask-sudo-pass
- hosts: cluster
  user: awoolford
  sudo: True

  tasks:

    - name: install linux packages
      apt: name=debconf-utils state=present

    - name: add WebUpd8 PPA repo
      apt_repository: repo='ppa:webupd8team/java'

    - name: accept Oracle Java installer licence agreement
      debconf: name='oracle-java7-installer' question='shared/accepted-oracle-license-v1-1' value='true' vtype='select'

    - name: Install JDK
      apt: pkg=oracle-java8-installer state=latest update-cache=yes force=yes

    - name: comment out the hostname association with 127.0.1.1 in /etc/hosts
      lineinfile: dest=/etc/hosts state=absent regexp="^127\.0\.1\.1"

    - name: set noatime on /data
      mount: name=/data src='LABEL=data' fstype=ext4 opts=noatime state=present

    - name: passwordless sudo for sudoers
      lineinfile: dest=/etc/sudoers state=present regexp='^%sudo ALL\=' line='%sudo ALL=(ALL) NOPASSWD:ALL' validate='visudo -cf %s'

    - name: set vm.swappiness = 0
      sysctl: name="vm.swappiness" value=0 sysctl_set=yes

    - name: set vm.swappiness = 0
      sysctl: name={{item}} value=1 sysctl_set=yes
      with_items:
        - net.ipv6.conf.all.disable_ipv6
        - net.ipv6.conf.default.disable_ipv6
        - net.ipv6.conf.lo.disable_ipv6

    - name: download cloudera installer
      get_url: url=http://archive.cloudera.com/cm5/installer/latest/cloudera-manager-installer.bin dest=/home/awoolford/ mode="u+x" owner=awoolford

    - name: install linux packages
      action: apt update_cache=yes pkg={{item}} state=installed
      with_items:
        - maven
        - vim

    - name: add local ssh public key to authorized keys
      authorized_key: user=awoolford key="{{ lookup('file', '~/.ssh/id_rsa.pub') }}"