RHEL Creating filesystem using ansible modules parted, filesystem, mount

 Ansible Modules

Ansible modiies are the ones that are used to perform the task on the managed nodes.

some of the modules are platform dependent such as yum (RHEL - flavor).

Some of the popular modules are:-

parted - to create partitions on our hard disks
filesystem - to format partitions
mount - to mount formatted partitions to mountpoint( directory)

yum - to install software binaries
apt - to install software on debian

file - to set properties on files or directiories
synchronize - to copy files from local file system on control node to managed node.
lineinfile - to update line in a file

command (Default) - to run ad-hoc commands
unarchive - to get zip files remotely and then unarchive them to the target location


For the lab practice, you may destroy your VMs and re-create again.
- set up password less authentication

$ sudo vagratn destroy --force
Make sure you keep your important config files

$ sudo vagrant up --provider=libvert

VM is created.

Login to control node
$ ssh control-node

$ rm .ssh/know_hosts

Password less login
$ ssh-keygen


From control node
Run ansible command
Validate that you are able to run commands from control node
$ ansible all -i myhosts -m command -a "hostname -f"

Lets go ahead and try with parted module

first google for parted module
absible parted

go to through the docs and look at the example

$ ansible all  \
-i myhosts \
-m parted \
-a "device=/dev/vdb number=1 state=present" \
--become

$ ansible all -i myhosts -m parted -a "device=/dev/vdc number=1 state=present" -b

you have to have root pw

This command will create a partition on each of the disk vdb and vdc

now we have to format. go back to google and look for ansible filesystem
to create filesystem, run the following command,

$ ansible all \
-i myhosts \
- m filesystem \
- a "fstype=ext4 dev=dev/vdb" \
--become

go and create filessytem on other device as well
$ ansible all -i myhosts -m filesystem -a "fstype=ext4 dev\/dev/vdc" --become

now, time to mount
google for "ansible mount"
look at the required ones.
path and state are required ones.
source
go to the example section

$ ansible all \
- i myhosts
- m mount \
-a "src=/dev/vdb state=mounted path=/data fstype=ext4

$ ansible all -i hosts -m mount -a "src=/dev/vdc state=mounted path=/data fstype=ext4 -become

check the fstab on the client machine.

if you get any errors, check the example @ansible documents.