gsmurali

var AWS = require('aws-sdk');
exports.handler = function(event, context) {
	var ec2 = new AWS.EC2({region: 'us-east-1'});
	ec2.startInstances({InstanceIds : ['i-0114833f8ffc9151c'] },function (err, data) {
		if (err) console.log(err, err.stack);
		else console.log(data);
		context.done(err,data);
	});
};

gsmurali

#!/bin/bash
yum install perl-Switch perl-DateTime perl-Sys-Syslog perl-LWP-Protocol-https -y
curl http://aws-cloudwatch.s3.amazonaws.com/downloads/CloudWatchMonitoringScripts-1.2.1.zip -O
unzip CloudWatchMonitoringScripts-1.2.1.zip
rm CloudWatchMonitoringScripts-1.2.1.zip

gsmurali

<powershell>
iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))
choco install python -y
(new-object net.webclient).DownloadFile('https://s3.amazonaws.com/aws-cli/AWSCLI64.msi','c:\AWSCLI64.msi')
msiexec.exe /i 'C:\AWSCLI64.msi' /qn
</powershell>

gsmurali

#!/bin/bash
yum install -y aws-cli
cd /home/ec2-user/
aws s3 cp 's3://aws-codedeploy-us-east-1/latest/codedeploy-agent.noarch.rpm' . --region us-east-1
yum -y install codedeploy-agent.noarch.rpm

gsmurali

aws autoscaling put-lifecycle-hook \
--lifecycle-hook-name scale-out-hook \
--auto-scaling-group-name MyASG \
--lifecycle-transition autoscaling:EC2_INSTANCE_LAUNCHING

aws autoscaling complete-lifecycle-action \
--lifecycle-action-result CONTINUE \
--instance-id i-0680775fb68bc97a5 \
--lifecycle-hook-name scale-out-hook \
--auto-scaling-group-name MyASG

gsmurali

aws elb create-load-balancer \
--load-balancer-name MyELB \
--listeners Protocol=TCP,LoadBalancerPort=80,InstanceProtocol=TCP,InstancePort=80 \
--subnets subnet-46e6506c subnet-57b8010f \
--scheme internet-facing \
--security-groups sg-aec570d4

aws autoscaling create-launch-configuration \
--launch-configuration-name MyLC \
--key-name virginia \

gsmurali

#!/bin/bash
yum install httpd -y
/sbin/chkconfig --levels 235 httpd on
service httpd start
instanceId=$(curl http://169.254.169.254/latest/meta-data/instance-id)
region=$(curl http://169.254.169.254/latest/dynamic/instance-identity/document | grep region | awk -F\" '{print $4}')
echo "<h1>$instanceId</h1>" > /var/www/html/index.html
aws ec2 create-tags --resources "$instanceId" --tags Key=Name,Value="PROD-$instanceId" --region "$region"

gsmurali

Configure user 'user' for sudo access and change root password and user password
* use passwd command to change passwords for user and root
Add user 'user' to sudo
*  usermod -g wheel user
Download chef development kit
* go to https://downloads.chef.io/chefdk/1.1.16 and copy url for RHEL - https://packages.chef.io/files/stable/chefdk/1.1.16/el/7/chefdk-1.1.16-1.el7.x86_64.rpm
wget the above link in the server to download the software
Install using the command - sudo rpm -ivh chefdk-1.1.16-1.el7.x86_64.rpm
To verify installation, type 'sudo chef-client --local-mode' (running chef-client in local mode)

gsmurali

Convergence
*Pre-convergence - Phase before a node is configured. Lint tests, foodcritic
*Convergence - Tests the defined resources to ensure they are in the desired state,"Providers' are what do the work (yum, apt-get etc.,) to enforce the desired configuration
*Post-Convergence - Occurs after the Chef convergence - Run tests that verifies a node is in the desired state of configuration/ Unit testing

Chef can be run over and over again without changing configurations if configurations are already in place (Idempotency)

gsmurali

[root@gsmurali1 user]# vim learn.rb
[root@gsmurali1 user]# cat learn.rb
package 'apache' do
end

This is the pre-convergence checks; to check ruby syntax and chef syntax
------------------------------------------------------------------------

[root@gsmurali1 user]# ruby -c learn.rb
Syntax OK