Ansible 3: Practice LAB

Setup Hosts File

Question. Create an Ansible file called /root/hosts with the hosts in your network.

servers:

controlplane

node01

Solution.

You may use ini or yaml format for ansible hosts files

Add this to file /root/hosts

ini
```
 [servers]
 controlplane
 node01
```
Check functionality and connectivity

Question. Verify connectivity to all hosts with ping module and save the output to /root/ping_check.

Solution:

Executing ping module against both servers
```
 ansible servers -i /root/hosts -m ping
```
Executing ping module against both servers and output to /root/ping_check
```
 ansible servers -i /root/hosts -m ping > /root/ping_check
```
Add inventory for future environments

Question. Your team is going to be adding new servers to the environment that haven't been built yet. Update your inventory file at /root/hosts to reflect the new environments.
- Update the /root/hosts file
- Use ansible-inventory commands to view the file values.
Solution:

Update the /root/hosts file to have a test and prod environment.

vi /root/hosts and then esc + : wq to save.
```
 [servers]
 controlplane
 node01

 [test_env]
 controltest type=client
 node01test  type=server

 [prod_env]
 controlprod type=client
 node01prod  type=server

 [non-prod:children]
 servers
 test_env
```
Now that you've updated the inventory for the new systems, view the inventory with ansible-inventory to see the host groups.
```
 ansible-inventory -i /root/hosts --list
```
To see that in graph output use this command.
```
 ansible-inventory -i /root/hosts --graph
```
To see that in yaml output.
```
 ansible-inventory -i /root/hosts --list -y
```
Ad Hoc to gather data

Question. Verify your hosts file and test ad hoc commands to your servers
- Verify servers uptime
- Verify OS type of servers
- Verify date and time of servers
Hint:
- Create a file /root/version with the Ansible Facts for the distribution of each server.
- Create a file /root/date with the Ansible Facts for the current date of each server.
Solution:
```
 cat /root/hosts
```
Check server uptime
```
 ansible servers -i /root/hosts -m shell -a 'uptime'
```
Setup module gives so much information you can use during playbook execution.
```
 ansible servers -i /root/hosts -m setup
```
Cut that output down a bit so you can just check the host distribution information
```
 ansible servers -i /root/hosts -m setup -a 'filter=ansible_distribution'
```
Send this output to the required file
```
 ansible servers -i /root/hosts -m setup -a 'filter=ansible_distribution' > /root/version
```
Cut that output down a bit so you can just check the host time information
```
 ansible servers -i /root/hosts -m setup -a 'filter=ansible_date_time'
```
Send this output to the required file
```
 ansible servers -i /root/hosts -m setup -a 'filter=ansible_date_time' > /root/date
```
Note:

-i = Inventory

-m = Module

-a = Module Argument
Ad Hoc to copy and edit

Question. Verify your /root/hosts file and /root/configfile.cfg
- Create a directory on your servers for deployments named /opt/deployment
- Push over your config file
- Change the values of var1 to equal 111111 only in the config file in /opt/deployment
Solution:
```
 cat /root/hosts
 cat /root/configfile.cfg
```
Create a Directory on each server named /opt/deployment
```
 ansible servers -i /root/hosts -m file -a 'path=/opt/deployment state=directory'
```
Copy over your /root/configfile.cfg to that directory
```
 ansible servers -i /root/hosts -m copy -a 'src=/root/configfile.cfg dest=/opt/deployment'
```
Let's fix a bad configuration line from 000000 to 111111 with the lineinfile module
```
 ansible servers -i /root/hosts -m lineinfile -a "path=/opt/deployment/configfile.cfg regexp='^var1' line='var1=111111'"
```
Quick verification that it looks good on all servers
```
 ansible servers -i /root/hosts -m shell -a 'cat /opt/deployment/configfile.cfg'
```

Create a playbook to stage an application.

Question. Verify your host's file

Create a deploy playbook called /root/deploy.yml to push the file /root/deploy.tar.gz over to all servers in the /opt directory.

Solution:

 cat /root/hosts
 vim /root/deploy.yml

Yaml for playbook

 ---
 - name: Start of Deployer playbook
   hosts: servers
   vars:
   gather_facts: True
   become: False
   tasks:

     - name: Copy deploy.tar.gz over at {{ ansible_date_time.iso8601_basic_short }}
       copy:
         src: /root/deploy.tar.gz
         dest: /opt/deploy.tar.gz
         checksum: c6cd21b75a4b300b9228498c78afc6e7a831839e

Get sha1 checksum of the archive.

 sha1sum /root/deploy.tar.gz

Run Playbook and verify that everything pushed correctly

 ansible-playbook -i /root/hosts /root/deploy.yml

Manual verify for all

 ansible servers -i /root/hosts -m shell -a 'ls -l /opt/deploy.tar.gz'

Ansible 3: Practice LAB

ini