DevOps Tools/Configuration/Ansible
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<nowiki>~$ sudo su ansible - | <nowiki>~$ sudo su ansible - | ||
~$ ssh-keygen | ~$ ssh-keygen | ||
| + | ~$ ssh-copy-id [email protected] | ||
~$ ssh-copy-id [email protected] | ~$ ssh-copy-id [email protected] | ||
~$ ssh-copy-id [email protected]</nowiki> | ~$ ssh-copy-id [email protected]</nowiki> | ||
Revision as of 19:05, 21 October 2018
Configuration
Ansible
Contents |
Installation
Ansible does not require any server component, no daemon needs to be running. Ansible runs over SSH.
Where ever you are going to run your playbooks from, needs to have ansible installed, the clients do not.
To get ansible 2.0+, at the time of this writing, use the epel repo
~$ sudo yum install epel-release ~$ sudo yum install git python python-devel python-pip openssl ansible -y ~$ ansible --version ansible 2.7.0 config file = /etc/ansible/ansible.cfg configured module search path = [u'/home/fgiuliani/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules'] ansible python module location = /usr/lib/python2.7/site-packages/ansible executable location = /usr/bin/ansible python version = 2.7.5 (default, Jul 13 2018, 13:06:57) [GCC 4.8.5 20150623 (Red Hat 4.8.5-28)]
Configuration
Basic configuration, define the inventory path & specify the sudo user
~$ sudo vim /etc/ansible/ansible.cfg uncomment ... inventory = /etc/ansible/hosts ... sudo_user = root
Nodes are determined by their names. These live in the inventory hosts file: /etc/ansible/hosts. By default there is a file there that can be used as an example.
~$ sudo vim /etc/ansible/hosts [local] localhost [group1] ansible2.r00tedvw.local [group2] ansible3.r00tedvw.local
Ansible User
Ansible needs to run as a non-privileged user with sudo rights. It also needs to be able to run commands without specifying a password as the playbooks will fail with password prompts.
NOTE: This will need to be done on EACH Node.
~$ sudo adduser ansible ~$ sudo passwd ansible ~$ visudo ... ## Allow root to run any commands anywhere root ALL=(ALL) ALL ansible ALL=(ALL) NOPASSWD: ALL
SSH key exchange
You can opt to either:
- define the SSH password for ansible in the playbook
- setup ssh key pairs so that no password is needed for login/authentication.
Below i'll quickly go over setting up ssh key exchange since this is the obvious choice.
~$ sudo su ansible - ~$ ssh-keygen ~$ ssh-copy-id [email protected] ~$ ssh-copy-id [email protected] ~$ ssh-copy-id [email protected]
