ansible basics

gistfile1.sh

#Install Ansible from EPEL
yum install ansible ansible-lint

#Update config file for ansible
cat >> /etc/ansible/hosts <<EOF

192.168.0.1

[web_servers]
192.168.0.20

[app_servers]
192.168.0.30
192.168.0.40
EOF

#ping all the hosts prompting password
ansible -m ping -u root all --ask-pass

#ping only the web_server prompting password
ansible -m ping -u root web_servers --ask-pass

#copy local ssh pub key to remote hosts prompting password
ansible all -m copy -a "src=/root/.ssh/id_rsa.pub dest=/root/.ssh/authorized_keys owner=root group=root mode=0600" -u root --ask-pass

#Delete a file from remote servers
ansible all -m shell -a "rm -v /root/.ssh/authorized_keys " -u root

#run a system command
ansible app_servers -m shell -a "rpm -qa | grep httpd"
ansible all -m shell -a "id;whoami"

#update a package using yum
ansible app_servers -m yum -a "name=wget state=latest" -u root

#check a service state
ansible app_servers -m service -a "name=httpd state=started" -u root
ansible app_servers -m service -a "name=httpd state=stopped" -u root

#manage authorized keys
 ansible all -m authorized_key -a "user=root key='{{lookup('file', '/root/.ssh/id_rsa.pub')}}' path=/root/.ssh/authorized_keys manage_dir=no"

#print ansible facter
 ansible app_servers -m facter

#Run a ansible playbook
 ansible-playbook app_server.yaml -f 10

cat >> app_server.yaml <<EOF
---
  - hosts: app_servers
    remote_user: root
    tasks:
      - yum: name={{item}} state=latest
        with_items:
          - httpd
          - mod_ssl
          - nc

EOF