Demonstration
In this post we are going to create number of fresh cloud servers: mybastion and 7 serverX
We will install ansible on the mybastion.
Once ansible is installed we will configure our remaining serversX.
Howto and results description
- Spin up cloud servers
auxnova --image 80fbcb55-b206-41f9-9bc2-2dd7aac6c061 --flavor 2 mybastion &> mybastion.log
for i in $(seq 1 7); do echo $i; auxnova --image 80fbcb55-b206-41f9-9bc2-2dd7aac6c061 --flavor 2 server$i &> server${i}.log; done
- Install ansible on mybastion host
auxssh bastion-ip
auxnova --image 80fbcb55-b206-41f9-9bc2-2dd7aac6c061 --flavor 2 mybastion &> mybastion.log
for i in $(seq 1 7); do echo $i; auxnova --image 80fbcb55-b206-41f9-9bc2-2dd7aac6c061 --flavor 2 server$i &> server${i}.log; done
aptitude update
aptitude upgrade
aptitude install libc6-dev
aptitude install python-dev
aptitude install python-pip
# http://docs.ansible.com/intro_installation.html
git clone git://github.com/ansible/ansible.git
pip install paramiko PyYAML jinja2 httplib2
cd ansible
make
make install
export PATH=$PATH:/usr/local/bin/
- Configure ansible on mybastion
cp -vb /root/ansible/examples/ansible.cfg ~/
sed 's/#host_key_checking = False/host_key_checking = False/g' ansible.cfg > ansible.cfg.old && mv ansible.cfg.old ansible.cfg
sed 's/\(transport *= \)\(.*\)/\1 paramiko/' ansible.cfg > ansible.cfg.new && mv -v ansible.cfg{.new,}
root@mybastion:~# egrep 'host_key_checking|transport' ansible.cfg | column -t
transport = paramiko
host_key_checking = False
- Update the host file for static DNS names
for i in $(seq 1 7); do nova show server$i | egrep 'accessIPv4| name' | cut -d '|' -f3 | xargs -n2 | awk '{ print $2, $1}'; done
162.13.9.170 server1
162.13.9.102 server2
162.13.11.232 server3
162.13.9.215 server4
162.13.9.59 server5
162.13.11.227 server6
162.13.11.222 server7
cat >> /etc/hosts <<END
162.13.9.170 server1
162.13.9.102 server2
162.13.11.232 server3
162.13.9.215 server4
162.13.9.59 server5
162.13.11.227 server6
162.13.11.222 server7
END
- Configure ansible inventory file
cp -b ansible_hosts{,.old}
rm ansible_hosts
for i in $(seq 1 7); do
cat server${i}.log | egrep ' name|adminPass' | cut -d '|' -f 3 | xargs -n2 | sed 's/\([^ ]*\) *\(.*\)/\1 ansible_ssh_user=root ansible_ssh_pass=\2/' >> ansible_hosts;
done
root@mybastion:~# cat ansible_hosts
server1 ansible_ssh_user=root ansible_ssh_pass=JaD2KJYswZ92
server2 ansible_ssh_user=root ansible_ssh_pass=keic343S3uJt
server3 ansible_ssh_user=root ansible_ssh_pass=2SNvD4cLN36m
server4 ansible_ssh_user=root ansible_ssh_pass=T7VKkm3GLjKm
server5 ansible_ssh_user=root ansible_ssh_pass=ghdWJeKRRt2f
server6 ansible_ssh_user=root ansible_ssh_pass=N2qVsxt93Lfb
server7 ansible_ssh_user=root ansible_ssh_pass=yMgS5Jx4zexM
- Run a test to verify ansible and inventory is setup correctly
root@mybastion:~# ansible all -m ping -i ansible_hosts
server1 | success >> {
"changed": false,
"ping": "pong"
}
server3 | success >> {
"changed": false,
"ping": "pong"
}
server4 | success >> {
"changed": false,
"ping": "pong"
}
server2 | success >> {
"changed": false,
"ping": "pong"
}
server5 | success >> {
"changed": false,
"ping": "pong"
}
server7 | success >> {
"changed": false,
"ping": "pong"
}
server6 | success >> {
"changed": false,
"ping": "pong"
}
- Run a simple command
ansible all -i ansible_hosts -a date ansible all -i ansible_hosts -m command -a /bin/date server1 | success | rc=0 >> Mon Feb 10 01:43:49 UTC 2014 server3 | success | rc=0 >> Mon Feb 10 01:43:49 UTC 2014 server2 | success | rc=0 >> Mon Feb 10 01:43:49 UTC 2014 server4 | success | rc=0 >> Mon Feb 10 01:43:49 UTC 2014 server5 | success | rc=0 >> Mon Feb 10 01:43:49 UTC 2014 server7 | success | rc=0 >> Mon Feb 10 01:43:50 UTC 2014 server6 | success | rc=0 >> Mon Feb 10 01:43:50 UTC 2014
- Use ansible modules to install the packages on the serverX
ansible all -i ansible_hosts -m apt -a 'name=cowsay state=installed'
server1 | success >> {
"changed": true,
"stderr": "",
"stdout": "Reading package lists...\nBuilding dependency tree...\nReading state information...\nSuggested packages:\n filters\nThe following NEW packages will be installed:\n cowsay\n0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.\nNeed to get 19.9 kB of archives.\nAfter this operation, 287 kB of additional disk space will be used.\nGet:1 http://mirror.rackspace.com/ubuntu/ precise/universe cowsay all 3.03+dfsg1-3 [19.9 kB]\nFetched 19.9 kB in 0s (166 kB/s)\nSelecting previously unselected package cowsay.\n(Reading database ... 50438 files and directories currently installed.)\nUnpacking cowsay (from .../cowsay_3.03+dfsg1-3_all.deb) ...\nProcessing triggers for man-db ...\nSetting up cowsay (3.03+dfsg1-3) ...\n"
}
server4 | success >> {
"changed": true,
"stderr": "",
"stdout": "Reading package lists...\nBuilding dependency tree...\nReading state information...\nSuggested packages:\n filters\nThe following NEW packages will be installed:\n cowsay\n0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.\nNeed to get 19.9 kB of archives.\nAfter this operation, 287 kB of additional disk space will be used.\nGet:1 http://mirror.rackspace.com/ubuntu/ precise/universe cowsay all 3.03+dfsg1-3 [19.9 kB]\nFetched 19.9 kB in 0s (861 kB/s)\nSelecting previously unselected package cowsay.\n(Reading database ... 49847 files and directories currently installed.)\nUnpacking cowsay (from .../cowsay_3.03+dfsg1-3_all.deb) ...\nProcessing triggers for man-db ...\nSetting up cowsay (3.03+dfsg1-3) ...\n"
}
server3 | success >> {
"changed": true,
"stderr": "",
"stdout": "Reading package lists...\nBuilding dependency tree...\nReading state information...\nSuggested packages:\n filters\nThe following NEW packages will be installed:\n cowsay\n0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.\nNeed to get 19.9 kB of archives.\nAfter this operation, 287 kB of additional disk space will be used.\nGet:1 http://mirror.rackspace.com/ubuntu/ precise/universe cowsay all 3.03+dfsg1-3 [19.9 kB]\nFetched 19.9 kB in 0s (1075 kB/s)\nSelecting previously unselected package cowsay.\n(Reading database ... 49847 files and directories currently installed.)\nUnpacking cowsay (from .../cowsay_3.03+dfsg1-3_all.deb) ...\nProcessing triggers for man-db ...\nSetting up cowsay (3.03+dfsg1-3) ...\n"
}
server5 | success >> {
"changed": true,
"stderr": "",
"stdout": "Reading package lists...\nBuilding dependency tree...\nReading state information...\nSuggested packages:\n filters\nThe following NEW packages will be installed:\n cowsay\n0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.\nNeed to get 19.9 kB of archives.\nAfter this operation, 287 kB of additional disk space will be used.\nGet:1 http://mirror.rackspace.com/ubuntu/ precise/universe cowsay all 3.03+dfsg1-3 [19.9 kB]\nFetched 19.9 kB in 0s (1116 kB/s)\nSelecting previously unselected package cowsay.\n(Reading database ... 49847 files and directories currently installed.)\nUnpacking cowsay (from .../cowsay_3.03+dfsg1-3_all.deb) ...\nProcessing triggers for man-db ...\nSetting up cowsay (3.03+dfsg1-3) ...\n"
}
server2 | success >> {
"changed": true,
"stderr": "",
"stdout": "Reading package lists...\nBuilding dependency tree...\nReading state information...\nSuggested packages:\n filters\nThe following NEW packages will be installed:\n cowsay\n0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.\nNeed to get 19.9 kB of archives.\nAfter this operation, 287 kB of additional disk space will be used.\nGet:1 http://mirror.rackspace.com/ubuntu/ precise/universe cowsay all 3.03+dfsg1-3 [19.9 kB]\nFetched 19.9 kB in 0s (108 kB/s)\nSelecting previously unselected package cowsay.\n(Reading database ... 49847 files and directories currently installed.)\nUnpacking cowsay (from .../cowsay_3.03+dfsg1-3_all.deb) ...\nProcessing triggers for man-db ...\nSetting up cowsay (3.03+dfsg1-3) ...\n"
}
server6 | success >> {
"changed": true,
"stderr": "",
"stdout": "Reading package lists...\nBuilding dependency tree...\nReading state information...\nSuggested packages:\n filters\nThe following NEW packages will be installed:\n cowsay\n0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.\nNeed to get 19.9 kB of archives.\nAfter this operation, 287 kB of additional disk space will be used.\nGet:1 http://mirror.rackspace.com/ubuntu/ precise/universe cowsay all 3.03+dfsg1-3 [19.9 kB]\nFetched 19.9 kB in 0s (1292 kB/s)\nSelecting previously unselected package cowsay.\n(Reading database ... 49847 files and directories currently installed.)\nUnpacking cowsay (from .../cowsay_3.03+dfsg1-3_all.deb) ...\nProcessing triggers for man-db ...\nSetting up cowsay (3.03+dfsg1-3) ...\n"
}
server7 | success >> {
"changed": true,
"stderr": "",
"stdout": "Reading package lists...\nBuilding dependency tree...\nReading state information...\nSuggested packages:\n filters\nThe following NEW packages will be installed:\n cowsay\n0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.\nNeed to get 19.9 kB of archives.\nAfter this operation, 287 kB of additional disk space will be used.\nGet:1 http://mirror.rackspace.com/ubuntu/ precise/universe cowsay all 3.03+dfsg1-3 [19.9 kB]\nFetched 19.9 kB in 0s (1056 kB/s)\nSelecting previously unselected package cowsay.\n(Reading database ... 49847 files and directories currently installed.)\nUnpacking cowsay (from .../cowsay_3.03+dfsg1-3_all.deb) ...\nProcessing triggers for man-db ...\nSetting up cowsay (3.03+dfsg1-3) ...\n"
}
- Run the cow program on all hosts and collect results
ansible all -i ansible_hosts -m shell -a 'executable=/bin/bash cowsay lucky number on $HOSTNAME is $RANDOM'
server1 | success | rc=0 >>
_________________________________
< lucky number on server1 is 9420 >
---------------------------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
server2 | success | rc=0 >>
__________________________________
< lucky number on server2 is 12466 >
----------------------------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
server4 | success | rc=0 >>
__________________________________
< lucky number on server4 is 27268 >
----------------------------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
server5 | success | rc=0 >>
__________________________________
< lucky number on server5 is 26818 >
----------------------------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
server3 | success | rc=0 >>
__________________________________
< lucky number on server3 is 17164 >
----------------------------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
server6 | success | rc=0 >>
__________________________________
< lucky number on server6 is 28732 >
----------------------------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
server7 | success | rc=0 >>
_________________________________
< lucky number on server7 is 6655 >
---------------------------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||
References
http://www.ansible.com/home
http://docs.ansible.com/intro_getting_started.html
http://docs.ansible.com/intro_adhoc.html
http://docs.ansible.com/list_of_packaging_modules.html
https://github.com/rtomaszewski/dotfiles/blob/master/.bashrc_rado_aux
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