Quick References #

Setup #

Installation #

yum install ansible
apt install ansible

pip3 install ansible 
# for python2 - default installation 
pip install ansible

remote machine should have ‘python’ - ‘gather_facts: False’ or ‘gather_facts: no’ otherwise

Remove #

rm -rf $HOME/.ansible
rm -rf $HOME/.ansible.cfg
sudo rm -rf /usr/local/lib/python2.7/dist-packages/ansible
sudo rm -rf /usr/local/lib/python2.7/dist-packages/ansible-2.5.4.dist-info
sudo rm -rf /usr/local/bin/ansible
sudo rm -rf /usr/local/bin/ansible-config
sudo rm -rf /usr/local/bin/ansible-connection
sudo rm -rf /usr/local/bin/ansible-console
sudo rm -rf /usr/local/bin/ansible-doc
sudo rm -rf /usr/local/bin/ansible-galaxy
sudo rm -rf /usr/local/bin/ansible-inventory
sudo rm -rf /usr/local/bin/ansible-playbook
sudo rm -rf /usr/local/bin/ansible-pull
sudo rm -rf /usr/local/bin/ansible-vault
sudo rm -rf /usr/lib/python2.7/dist-packages/ansible
sudo rm -rf /usr/local/lib/python2.7/dist-packages/ansible

Configuration #

ansible configuration places #

path variable $Ansible_Config ~/.ansible.cfg /etc/ansible/ansible.cfg

ansible-config view
# list of possible environment variables
ansible-config dump

configuration for external roles #

filename: ~/.ansible.cfg

[defaults]
roles_path = ~/repos/project1/roles:~/repos/project2/roles

check configuration #

ansible-config view

inventory #

ini file #

# example cfg file
[web]
host1
host2 ansible_port=222 # defined inline, interpreted as an integer

[web:vars]
http_port=8080 # all members of 'web' will inherit these
myvar=23 # defined in a :vars section, interpreted as a string

Usages #

simple file for creating one folder #

- hosts: all
  tasks:
    - name: Creates directory
      file:
        path: ~/spark-submit/trafficsigns
        state: directory
        mode: 0775
    - name: copy all files from folder
      copy: 
        src: "/home/projects/ubs/current-task/nodes/ansible/files" 
        dest: ~/spark-submit/trafficsigns
        mode: 0775

    - debug: msg='folder was created for host {{ ansible_host }}'

loop example #

- name: scripts {{ item }}
      template:
        mode: 0777 
        src: "templates/{{ item }}" 
        dest: "{{ root_folder }}/{{ item }}" 
      loop:
        - "start-all.sh"
        - "status.sh"
        - "stop-all.sh"

execute ansible locally, local execution #

# --extra-vars="mapr_stream_path={{ some_variable_from_previous_files }}/some-argument" \

ansible localhost \
    --extra-vars="deploy_application=1" \
    --extra-vars=@group_vars/all/vars/all.yml \
    --extra-vars=@group_vars/ubs-staging/vars/ubs-staging.yml \
    -m include_role \
    -a name="roles/labeler"

Playbook #

execute ansible-playbook with external paramters #

ansible-playbook -i inventory.ini playbook.yml --extra-vars "$*"

with path to file for external parameters, additional variables from external file

ansible-playbook -i inventory.ini playbook.yml --extra-vars @/path/to/var.properties
ansible-playbook playbook.yml --extra-vars=@/path/to/var.properties

Miscellaneous #

check is it working, ad-hoc command #

ansible remote* -i inventory.ini -m "ping"
ansible remote* -i inventory.ini --module-name "ping"

ansible remote* -i inventory.ini -a "hostname"

Debug #

export ANSIBLE_STRATEGY=debug
# revert it afterwards ( avoid "ERROR! Invalid play strategy specified: "):
# export ANSIBLE_STRATEGY=linear

print variables

task.args
task.args['src']
vars()

change variables

del(task.args['src'])
task.args['src']="/new path to file"

manage palying