How to download ansible and get started using it
Requirements for Ansible are extremely minimal.
If you are running python 2.6 on the overlord machine (the machine that you’ll be talking to the other machines from), you will need:
If you are running less than Python 2.6, you will also need:
On the managed nodes, to use templating, you will need:
As the project is still pretty new, you will probably want to clone the git checkout, so you can keep up with all of the latest features, and also contribute easily back to the project (if you want).
Instructions for installing from source are below.
You may also wish to follow the Github project if you have a github account. This is also where we keep the issue tracker for sharing bugs or feature ideas.
Ansible is trivially easy to run from a checkout, root permissions are not required to use it:
$ git clone git://github.com/ansible/ansible.git
$ cd ./ansible
$ source ./hacking/env-setup
You can optionally specify an inventory file other than /etc/ansible/hosts:
$ cat "127.0.0.1" > ~/ansible_hosts
$ export ANSIBLE_HOSTS=~/ansible_hosts
Now let’s test things:
$ ansible all -m ping --ask-pass
You can install Ansible using “make install”. This is done through python-distutils:
$ git clone git://github.com/ansible/ansible.git
$ cd ./ansible
$ sudo make install
In the near future, pre-built RPMs will be available through your distribution. Until that time, you can use the make rpm command:
$ git clone git://github.com/ansible/ansible.git
$ cd ./ansible
$ make rpm
$ sudo rpm -Uvh ~/rpmbuild/RPMS/noarch/ansible-*.noarch.rpm
Note that if you are tracking the upstream source (i.e. git), the RPM revision may not be bumped with every source code change. To get around this, you can use rpm -Uvh with –force when RPM tells you the package is still at the same version. This is perfectly safe to do.
Tagged releases are available as tar.gz files from the Ansible github project page:
At this point in Ansible’s development, running or building from checkout is preferred if you want access to all of the latest modules and improvements.
Edit (or create) /etc/ansible/hosts and put one or more remote systems in it, for which you have your SSH key in authorized_keys:
192.168.1.50
aserver.example.org
bserver.example.org
Set up SSH agent to avoid retyping passwords:
ssh-agent bash
ssh-add ~/.ssh/id_rsa
Now ping all your nodes:
ansible all -m ping
Now run a live command on all of your nodes:
ansible all -a "/bin/echo hello"
Congratulations. You’ve just contacted your nodes with Ansible. It’s now time to read some of the more real-world Command Line Examples, and explore what you can do with different modules, as well as the Ansible Playbooks language. Ansible is not just about running commands, but you already have a working infrastructure!
See also