Ansible : Install2015/04/15

	Install Ansible which is configuration management tool. Ansible does not require dedicated server/client program, it needs Ansible command and SSH only.
[1]	Start SSH daemon on all clients which you'd like to manage with Ansible.
[2]	Install Ansible.

# install from EPEL

[root@dlp ~]#

yum --enablerepo=epel -y install ansible openssh-clients

[3]	Set clients for management as a basic setting of Ansible. There are more details for settings in original file "/etc/ansible/hosts", refer to it, too.

[root@dlp ~]#

vi /etc/ansible/ansible.cfg

# line 39: uncomment (not check host key)

host_key_checking = False

[root@dlp ~]#

mv /etc/ansible/hosts /etc/ansible/hosts.org

[root@dlp ~]#

vi /etc/ansible/hosts

# write clients you manage

10.0.0.50

# possible to group

# define any group name you like

[target_servers]

# write clients to be grouped

10.0.0.51
10.0.0.52

# confirm setting

# show all defined hosts

[root@dlp ~]#

ansible all --list-hosts

    10.0.0.50
    10.0.0.51
    10.0.0.52

# show specific hosts in a group

[root@dlp ~]#

ansible target_servers --list-hosts

    10.0.0.51
    10.0.0.52

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