python - Running bash commands in Ansible task -


i porting makefile series of ansible tasks. make file has these 2 lines of code troubling me when comes ansible:

servers := shell mysql "select hostname servers" easy_install := wget https://bootstrap.pypa.io/ez_setup.py -o - | python

firstly, what's appropriate ansible way use dynamic vars value of servers? value of servers depends upon environment, i.e. stage, production, etc.

secondly, don't want install python-setuptools package aptitude because have had nothing problems in past. how run wget shell command ansible?

it looks wanting download script , run command against number of servers.

the concept of 'hosts' in ansible playbook covers 'servers' concept - need populate inventory ansible can read hosts, or possibly pass in hosts variable when running playbook (lets call variable 'servers').

wget , running various commands standard ansible modules (get_url generalised name wget).

so, example playbook:

- hosts: "{{ servers }}"   tasks:     - name: file       get_url:         url: "https://bootstrap.pypa.io/ez_setup.py"         dest: "/usr/ez_setup.py"      - name: run command       command: "python /usr/ez_setup.py"

you call above playbook (lets call shipit.yaml) this:

ansible-playbook /usr/shipit.yaml --extra-vars "servers=10.0.0.1"

you use add_hosts module , custom group name dynamically read servers database , populate custom group, run next set of commands against custom group hosts item.

you milage may vary depending on if need sudo enabled (sudo: yes) or not, , there may better way of running python script using command (command run every time no regard if has been run - not idempotent in other words).

hopefully above gives starting point.


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