Instant DevOps discusses advancing technology, growing business challenges, and the agile development model. It introduces infrastructure as code and Rex, a tool that allows defining servers, installing packages, managing files and services through a simple domain-specific language. Rex can deploy configurations and tasks across multiple machines at once through templates.

1. Instant DevOps

2. advancing technology

3. growing business challenges

4. agile development model

6. source code
+ application data
+ bare metal
——————————————————————
infrastructure as code

7. We need new tools!

10. $ curl -L get.rexify.org | perl - --sudo -n Rex
$ cpanm Rex

11. Hardware File Package
Template FS SCM
Transaction Cron Service
Cache Host User
Reports LVM Virtualization
Inventory kmod Box
Partition Network Cloud

12. make -> Makefile
rex -> Rexfile

13. user "ubuntu";
password "ubuntu";
pass_auth;

14. user "ubuntu";
private_key "~/.ssh/id_rsa";
public_key "~/.ssh/id_rsa.pub";
key_auth;

15. user "ubuntu";
password "ubuntu";
pass_auth;
sudo -on;
sudo_password "ubuntu";

16. user "ubuntu";
password "ubuntu";
pass_auth;
sudo -on;
sudo_password "ubuntu";
group servers => "web1", "web2", "web3";

17. user "ubuntu";
password "ubuntu";
pass_auth;
sudo -on;
sudo_password "ubuntu";
group servers => "web[1..3]";

18. user "ubuntu";
password "ubuntu";
pass_auth;
sudo -on;
sudo_password "ubuntu";
group servers => "web[1..3]", "lb[1..2]",
"db[01..02]", "mail";

19. user "ubuntu";
password "ubuntu";
pass_auth;
sudo -on;
sudo_password "ubuntu";
group servers => "web[1..3]", "lb[1..2]",
"db[01..02]", "mail";
task "uptime", group => "servers", sub {
say run "uptime";
};

20. task "upgrade", group => "servers", sub {
update_package_db;
update_system;
};

21. task "setup_ntp", group => "servers", sub {
install "ntp";
};

22. task "setup_ntp", group => "servers", sub {
install "ntp";
service ntp => ensure => "started";
};

23. task "setup_ntp", group => "servers", sub {
install "ntp";
file "/etc/ntp.conf",
source => "files/etc/ntp.conf";
service ntp => ensure => "started";
};

24. task "setup_ntp", group => "servers", sub {
install "ntp";
file "/etc/ntp.conf",
source => "files/etc/ntp.conf",
owner => "root",
group => "root",
mode => 644;
service ntp => ensure => "started";
};

25. task "setup_ntp", group => "servers", sub {
install "ntp";
file "/etc/ntp.conf",
source => "files/etc/ntp.conf",
owner => "root",
group => "root",
mode => 644,
on_change => sub {
service ntp => "restart"
};
service ntp => ensure => "started";
};