[LearnAdmin] Installing configuring Ansible and deploying haproxy playbook

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Naresh Surampudi

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Sep 14, 2016, 6:54:11 AM9/14/16

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Basic installation

sudo yum install ansible (or) sudo pip install ansible

Configuring your hosts file with inventory


cat /etc/ansible/hosts 

[haproxy]

10.0.184.12   



[all_servers:vars]

ansible_connection=ssh 

ansible_user=root

ansible_ssh_private_key_file=/Users/home/yoursshkey.pem


I have only one server in my inventory where i will be setting up an haproxy 
For easy management we will be writing common variables under [all_servers:vars]


When we run ansible play books hosts will be picked from the above inventory file

Example : hosts: haproxy  ( this will run on all servers under haproxy )

Now test servers doing a ping ( ping in ansible will connect to the server using ssh )


 ansible haproxy -m ping


10.0.184.12 | SUCCESS => {


    "changed": false, 


    "ping": "pong"


}


Then Download ready made packages from ansible galaxy 
https://galaxy.ansible.com/devops/haproxy/
Also download dependencies that will configure EPEL repositories
https://galaxy.ansible.com/sfromm/epel/
Then create a common playbook for both the roles 

- hosts: haproxy

  roles:

     - { role: devops.epel }





- hosts: haproxy

  roles:

     - role: devops.haproxy

       haproxy_stats:

         name: 'global_monitor'

         ip: "{{ ansible_default_ipv4.address }}"

         port: '38888'

         stats:

           enabled: True

           hide_version: true

           uri: /slb_stats_url

           realm: Welcome\ to\ slb\ monitor

           auth: admin:admin

           refresh: 2s

       haproxy_frontends:

       - name: 'fe-testsite'

         ip: '{{ ansible_default_ipv4.address }}'

         port: '80'

         maxconn: '1000'

         default_backend: 'be-testsite'

       haproxy_backends:

       - name: 'be-testsite'

         description: 'testsite'

         servers:

           - name: 'be-testsite-01'

             ip: '192.168.1.100'

sh-3.2# ansible-playbook main.yml

PLAY [haproxy] *****************************************************************

TASK [setup] *******************************************************************
ok: [10.0.184.12]

TASK [devops.epel : Installs python dependencies] ******************************
changed: [10.0.184.12] => (item=[u'libselinux-python'])

TASK [devops.epel : Disable SElinux] *******************************************
changed: [10.0.184.12]

TASK [devops.epel : create EPEL yum repository] ********************************
changed: [10.0.184.12]

TASK [devops.epel : import EPEL GPG key] ***************************************
changed: [10.0.184.12]

PLAY [haproxy] *****************************************************************

TASK [setup] *******************************************************************
ok: [10.0.184.12]

TASK [devops.haproxy : Include OS-specific variables.] *************************
ok: [10.0.184.12]

TASK [devops.haproxy : Installs haproxy as well as socat for socket api.] ******
changed: [10.0.184.12] => (item=[u'haproxy', u'socat'])

TASK [devops.haproxy : Ensure HAProxy is started and enabled on boot.] *********
changed: [10.0.184.12]

TASK [devops.haproxy : Ensure chroot directory exists.] ************************
ok: [10.0.184.12]

TASK [devops.haproxy : Create directory for the frontend] **********************
changed: [10.0.184.12]

TASK [devops.haproxy : Empty the folder if not already empty] ******************
changed: [10.0.184.12]

TASK [devops.haproxy : Build up the frontends] *********************************
[DEPRECATION WARNING]: Using bare variables is deprecated. Update your playbooks so that the environment value uses the full variable syntax ('{{haproxy_frontends}}').
This feature will be
removed in a future release. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.
changed: [10.0.184.12] => (item={u'ip': u'10.0.184.12', u'maxconn': u'1000', u'default_backend': u'be-testsite', u'port': u'80', u'name': u'fe-testsite'})

TASK [devops.haproxy : Create directory for the backends] **********************
changed: [10.0.184.12]

TASK [devops.haproxy : Empty the folder if not already empty] ******************
changed: [10.0.184.12]

TASK [devops.haproxy : Build up the backends] **********************************
[DEPRECATION WARNING]: Using bare variables is deprecated. Update your playbooks so that the environment value uses the full variable syntax ('{{haproxy_backends}}').
This feature will be
removed in a future release. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.
changed: [10.0.184.12] => (item={u'servers': [{u'ip': u'192.168.1.100', u'name': u'be-testsite-01'}], u'description': u'testsite', u'name': u'be-testsite'})

TASK [devops.haproxy : Create directory for the listen sections] ***************
changed: [10.0.184.12]

TASK [devops.haproxy : Empty the folder if not already empty] ******************
changed: [10.0.184.12]

TASK [devops.haproxy : Build up the listen sections] ***************************
skipping: [10.0.184.12] => (item=haproxy_listen)

TASK [devops.haproxy : Create directory for the userlists] *********************
changed: [10.0.184.12]

TASK [devops.haproxy : Empty the folder if not already empty] ******************
changed: [10.0.184.12]

TASK [devops.haproxy : Build up the userlist sections] *************************
skipping: [10.0.184.12] => (item=haproxy_userlists)

TASK [devops.haproxy : Create the compiled folder] ****************************
changed: [10.0.184.12]

TASK [devops.haproxy : Empty the folder if not already empty] ******************
changed: [10.0.184.12]

TASK [devops.haproxy : Build up the global config] *****************************
changed: [10.0.184.12]

TASK [devops.haproxy : Build up the default config] ****************************
changed: [10.0.184.12]

TASK [devops.haproxy : Build up the stats config] ******************************
changed: [10.0.184.12]

TASK [devops.haproxy : Assemble the frontends configuration file] **************
changed: [10.0.184.12]

TASK [devops.haproxy : Assemble the backends configuration file] ***************
changed: [10.0.184.12]

TASK [devops.haproxy : Assemble the listen sections configuration file] ********
changed: [10.0.184.12]

TASK [devops.haproxy : Assemble the userlists sections configuration file] *****
changed: [10.0.184.12]

TASK [devops.haproxy : Assemble the final configuration file] ******************
changed: [10.0.184.12]

RUNNING HANDLER [devops.haproxy : restart haproxy] *****************************
changed: [10.0.184.12]

PLAY RECAP *********************************************************************
10.0.184.12 : ok=31 changed=27 unreachable=0 failed=0

This is just a test deployment that will forward request to background test server 192.168.1.100