Lab_2.adoc

Lab #2. Adhoc_commands

TASK 1.

Test that Ansible is setup correctly to communicate with all hosts in your inventory using the ping module;

$ ansible all -m ping

TASK 2.

Fetch and display to STDOUT Ansible facts using the setup module;

$ ansible all -m setup

Example Output;

node-2 | SUCCESS => {
    "ansible_facts": {
        "ansible_all_ipv4_addresses": [
            "10.0.1.57"
        ],
        "ansible_default_ipv4": {
            "address": "10.0.1.57",
            "alias": "eth0",
            "broadcast": "10.0.1.255",
            "gateway": "10.0.1.1",
            "interface": "eth0",
            "macaddress": "0a:5e:fb:bf:e8:aa",
            "mtu": 9001,
            "netmask": "255.255.255.0",
            "network": "10.0.1.0",
            "type": "ether"
        },
        "ansible_default_ipv6": {},
        "ansible_device_links": {
            "ids": {},
            "labels": {},
            "masters": {},
            "uuids": {
                "xvda2": [
                    "65722bd1-fccc-453e-a96a-8f3599aa0466"
                ]
            }
        },

<<< Output Truncated >>>

TASK 3.

Setup and enable the EPEL package repository on the hosts in the "web" group using the yum module;

$ ansible web -b -m yum -a "name=https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm state=present"

Note	Run this the command the first time and notice the changes as identified in stdout.

TASK 3-b.

Re-run the above command and notice ansible does not attempt any changes as the package has been installed. the new output from re-running the command should be similar to below;

node-1 | SUCCESS => {
    "changed": false,
    "failed": false,
    "msg": "",
    "rc": 0,
    "results": []
}
node-2 | SUCCESS => {
    "changed": false,
    "failed": false,
    "msg": "",
    "rc": 0,
    "results": []
}
node-3 | SUCCESS => {
    "changed": false,
    "failed": false,
    "msg": "",
    "rc": 0,
    "results": []
}

TASK 4.

EXTRA CREDIT: Try running the following commands on your control node and review the output. The last command shows how to specify a specific node for exclusion using the "--limit" switch.

$ ansible all -m setup -a "gather_subset=virtual"
$ ansible all -m setup -a "filter=ansible_fqdn"
$ ansible all -m command -a "uptime"
$ ansible all -m ping --limit '!control'