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# Add this snippet to the top of your playbook. | |
# It will install python2 if missing (but checks first so no expensive repeated apt updates) | |
# gwillem@gmail.com | |
- hosts: all | |
gather_facts: False | |
tasks: | |
- name: install python 2 | |
raw: test -e /usr/bin/python || (apt -y update && apt install -y python-minimal) |
I use the following snippet, which can work across different distributions and only expects python
to be installed, which is mostly the case with default ubuntu
boxes:
pre_tasks:
- raw: which /usr/bin/python || which /usr/bin/python3
register: py_interpreter
changed_when: py_interpreter.stdout != ""
- set_fact:
ansible_python_interpreter: "{{ py_interpreter.stdout }}"
- name: Gathering Facts
setup: #aka gather_facts
Thanks @dpetukhov
ansible -i /path/to/inventory all -m raw -a "apt -y update && apt install -y python"
I needed to install also pyton-setuptools to avoid the error
raw: test -e /usr/bin/python || (apt -y update && apt install -y python-minimal python-setuptools)
I don't know if that is possible but if CentOS or RHEL comes without python, I did this:
raw: test -e /usr/bin/python || (yum -y update && yum install -y python) || (apt -y update && apt install -y python-minimal)
gather_facts: False pre_tasks: - name: Install python for Ansible raw: test -e /usr/bin/python || (apt -y update && apt install -y python-minimal) changed_when: False - setup: # aka gather_facts
works for me, thanks.
Thanks, a great help
does anyone know how to install python if the target machine has no internet access? Let's say I have python package located on my control machine, is there any way to copy the python package to target machine?
FWIW, I've got an ansible role based upon this thread that works for EL/RedHat/Debian/Ubuntu/FreeBSD. I just published it to ansible- galaxy. Would love for some feedback.
does anyone know how to install python if the target machine has no internet access? Let's say I have python package located on my control machine, is there any way to copy the python package to target machine?
I hope you've found a solution by now, but if not my suggestion would be to use 'local_action' and perform an scp or sftp command.
Lil' update, on ubuntu 18.04 installing python-minimal will prompt interactively for some libssl installation, which then sits there forever. Using test -e /usr/bin/python || (apt -y update && UCF_FORCE_CONFOLD=1 DEBIAN_FRONTEND=noninteractive apt-get -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" -qq -y install python-minimal)
fixes this behavior.
Inspired by https://bugs.launchpad.net/ubuntu/+source/ansible/+bug/1833013/comments/6
Why is the raw
command necessary for this? I've been having trouble running this lately (likely due to @mahlingam's comment above), and I found that this seems to work for me:
- hosts: all
become: true
become_user: root
become_method: sudo
gather_facts: no
pre_tasks:
- name: Install python for Ansible
apt:
update_cache: yes
name:
- python-minimal
- setup: # aka gather_facts
tasks:
...
Just wondering if there's a reason not to do this
Just wondering if there's a reason not to do this
Yep, I think it's simply that a target server without python installed, is unable to run normal ansible task steps. Using 'raw' side-steps the need for python.
PS I think bootstrapping a Python 2 installation is now likely to be unnecessary, since Ansible 2.8+ will auto-detect a suitable Python interpreter to use anyway.
https://docs.ansible.com/ansible/latest/reference_appendices/interpreter_discovery.html
If anyone is looking for a solution for Ubuntu 20.04 - change python-minimal
to python2-minimal
.
@tlc, you could almost certainly use jinja expressions in what you pass to raw: