LAM-33 Created common role.

ansible/playbooks/common/install.yml

+---
+- hosts: all
+  user: root
+  roles:
+    - ../roles/common
+

ansible/playbooks/install.yml

----
-
-- hosts: vms
-  user: root
-
-  tasks:
-  # aptitude packages
-    - include: ../tasks/aptitude/upgrade.yml   tags=install_scripts
-    - include: ../tasks/aptitude/java.yml   tags=install_scripts
-    - include: ../tasks/aptitude/vim.yml   tags=install_scripts
-    - include: ../tasks/aptitude/python.yml   tags=install_scripts
-  # copy /etc/hosts file
-    - include: ../tasks/install/hosts.yml  tags=install_scripts
-  # copy /etc/environment file
-    - include: ../tasks/install/environment.yml tags=install_scripts
-  # run ssh-keygen
-    - include: ../tasks/ssh/ssh-keygen.yml  tags=install_scripts
-
-- hosts: master
-  user: root
-
-  tasks:
-  # copy ssh public key of master
-    - include: ../tasks/ssh/fetch-key.yml
-
-- hosts: vms
-  user: root
-
-  tasks:
-  # distribute ssh key to all nodes
-    - include: ../tasks/ssh/authorized-key.yml

ansible/roles/common/files/environment

+export JAVA_HOME=/usr/
+export HADOOP_HOME=/usr/local/hadoop

ansible/roles/common/files/ssh-config

+Host master-node
+  StrictHostKeyChecking no
+
+Host slave-1
+  StrictHostKeyChecking no
+
+Host slave-2
+  StrictHostKeyChecking no
+
+Host 0.0.0.0
+  StrictHostKeyChecking no
+

ansible/roles/common/tasks/common-1.yml

+---
+  - name: Upgrade packages.
+    apt: upgrade=dist update_cache=yes
+
+  - name: Install the latest Java 7.
+    apt: name=openjdk-7-jdk state=latest install_recommends=no update_cache=yes
+
+  - name: Copy hosts file.
+    template: src=hosts.j2 dest=/etc/hosts backup=no owner=root group=root mode=0750
+
+  - name: Copy environment file.
+    copy: src=environment dest=/etc/environment backup=no owner=root group=root mode=0750
+
+  - name: Generate ssh key.
+    shell: cat /dev/zero | ssh-keygen -q -N ""
+    args:
+      creates: /root/.ssh/id_rsa.pub
+

ansible/tasks/ssh/authorized-key.yml → ansible/roles/common/tasks/common-2.yml

 ---
-  - name: ssh key
-    authorized_key: user=root key="{{ lookup('file', '/tmp/fetched/id_rsa.pub') }}"
+  - name: Distribute ssh key to all nodes.
+    authorized_key: user=root key="{{ lookup('file', '/tmp/fetched/id_rsa.pub') }}" 
+

ansible/roles/common/tasks/main.yml

+---
+  - name: Include common tasks.
+    include: common-1.yml
+    tags:
+      - common-1
+
+  - name: Include tasks for master.
+    include: master.yml
+    when: "'master' in group_names"
+    tags:
+      - master
+
+  - name: Include more common tasks.
+    include: common-2.yml
+    tags:
+      - common-2
+

ansible/roles/common/tasks/master.yml

+---
+  - name: Fetch id_rsa.pub file from master.
+    fetch: src=/root/.ssh/id_rsa.pub dest=/tmp/fetched/ flat=yes
+
+  - name: Set up ssh config.
+    copy: src="ssh-config" dest="/root/.ssh/config" owner=root group=root mode=664
+

ansible/files/etc/hosts → ansible/roles/common/templates/hosts.j2

 127.0.0.1       localhost
-192.168.0.3     snf-661306
-192.168.0.2     snf-661303
-192.168.0.4     snf-661304
+{{ hostvars["master-node"]["internal_ip"] }} master-node
+{{ hostvars["slave-1"]["internal_ip"] }}     slave-1
+{{ hostvars["slave-2"]["internal_ip"] }}     slave-2
 
 # The following lines are desirable for IPv6 capable hosts
 ::1     localhost ip6-localhost ip6-loopback

ansible/tasks/aptitude/java.yml

----
-# Install latest version of "openjdk-7-jdk" ignoring "install-recommends"
-- name: install latest Java 7
-  tags: install_scripts
-  apt: name=openjdk-7-jdk state=latest install_recommends=no update_cache=yes

ansible/tasks/aptitude/python.yml

----
-# Install python
-- name: install python
-  tags: install_scripts
-  apt: name=python state=latest install_recommends=no update_cache=yes

ansible/tasks/aptitude/upgrade.yml

----
-
- # Update all packages to the latest version
- - name: Upgrade packages
-   tags: install_scripts
-   apt: upgrade=dist update_cache=yes

ansible/tasks/aptitude/vim.yml

----
-# Install vim
-- name: install vim
-  tags: install_scripts
-  apt: name=vim state=latest install_recommends=no update_cache=yes

ansible/tasks/hadoop/hdfs_dirs.yml

----
-
-- name: Make hdfs user dir
-  command: /usr/local/hadoop/bin/hadoop fs -mkdir /user
-
-- name: Make hdfs user/root dir
-  command: /usr/local/hadoop/bin/hadoop fs -mkdir /user/root

ansible/tasks/install/environment.yml

----
-
-#copy environment file
-- name: Copy environment file
-  tags: install_scripts
-  copy: src=../files/etc/environment
-        dest=/etc/ backup=no
-        owner=root group=root mode=0750

ansible/tasks/install/hosts.yml

----
-
-#copy hosts ip-hostname file
-- name: Copy hosts file
-  tags: install_scripts
-  copy: src=../files/etc/hosts
-        dest=/etc/ backup=no
-        owner=root group=root mode=0750

ansible/tasks/ssh/fetch-key.yml

----
-
-- name: fetch id_rsa.pub file from master
-  fetch: src=/root/.ssh/id_rsa.pub dest=/tmp/fetched/ flat=yes

ansible/tasks/ssh/ssh-keygen.yml

----
-
-- name: Run ssh-keygen
-  tags: install_scripts
-  shell: cat /dev/zero | ssh-keygen -q -N ""
-  args:
-    creates: /root/.ssh/id_rsa.pub
-