1.
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2 li» KÜU} Q?
W EW F_t1%1r íx” Lí:1 .1'* B

2.
System administration, has been traditionally
done manually.

3.
What is my server? What packages were
installed? What configuration files were
changed?

4.
Replicating is laborious Manual installation,
configuration, troubleshooting . . . phew!

5.
l’ iii 1-. ‘ ll Ï-lll g¿1!r, ,'; ¿‘í_l, il, i i-ría’ llclÍ-lÍ-lll llllíï! llllÉ-lIJlÍïllÏl! lll l)_lïiÏl_l_
iii} 1-? íÏsilïlllgelï-ÏÏ? cruïiilï-l ÏIJJ "ÏlllÍ-l ur 1-! Yibuti: :ít-ii! lp)

6.
Add fuel to the flames! Virtual machines enable
us to create computers, for various tashs

7.
hifi/ á’ eme . v*»ïzÉ, >r c/ [Ïlifilïfjï ‘to CÏ/ ïlílfl ¡hour/ h 5/
‘¿Í/ Pie? El/ Ï/If/ s/ cW/ ÏÍ/ ,l*¿; *ie1/ïr ¿ ’/ ‘if/ ire ÏÏÏ/ ÏÜÏÏ’ Ífiillif’
Jilïl/ Ïgifi/ l/Mg, ’ the) El
—« Alirrïllrglnr lfniculn

8.
Ansible can SSH to server, install packages and
configure the system.

9.
SYSTEM ïTltTï SFEClFlEll Ibi liljtlififliïli
— hosts: devservers
tasks:
- apt: name= emacs state= present
- apt: name= python state= present
- pip: name= cryptography state= present
- copy: >
src= fi1es/ etc/ network/ interfaces
dest= /etc/ network/ interfaces
owner= root group= root mode=644

10.
J
n
autre-ui: gvnutrv fíi-ltillï-li” : ;l: =;ii: .2 ‘El? (Ïilllï-ll furl iii In a l! C1
iiÏ-llÍlÍ-llrl/ ‘ïlltlll ! |'!1!kÏÏ_ÏÍ'lñh! f¿r; _lfiJïllfiíg ïuli/ !liÍ, i_l! -!, i' (Juli-L,

11.
lrliill/ anual: ¡durable fííLiÏlgl Jürrztïiiiit-L, bull: Ti"; l ud aurora
L a
l llhiÏv,

12.
Afilïlfilfi VS SHELL Slïfilfiïï
Script to add a cronjob.
crontab -1 > mycron
echo "0 5 * * 15 -alh > / dev/ null" >> mycron
crontab mycron
rm mycron
lírlhat happens ifthe script is run ‘turice?
- cron: name= "check-dirs" minute= "0" hour= "5" job= "1s -alh > / dev/ null"
The equivalent in ixnsible. Can be run multiple times!

13.
“ Idempotence — operations that
can be applied multiple times
without changing the result
beyond the initial application.
—Wihipedia

14.
The net effect? People who use shell scripts,
generally end-up managing manually after the
first run.

15.
_lrl1utm; —;t—2 3:5 lli-teaïílilülygleïl, no ¿lt-uiïuiaitit-ul li
‘¿llllllïlllïlfïlïiïli! ll,

16.
Base OS image is installed on the desktop using
cloning using pendrives.

17.
Ansible Pull Mode: At boot, download the
playbook from central location, and invoke
ansible on localhost.