Execute “rake task” in Opsworks

All the Opsworks Instances have GEMS installed in 2 locations
 
  1. System-Wide Location (/usr/local/lib/ruby/gems/2.0.0/gems)
  2. User-Home Location, in Opsworks its Deploy user (/home/deploy/.bundler/galaxylifecms/ruby/2.0.0/gems)

The GEMS listed in Gemfile are installed in the User-Home location by Bundler

If you need to execute a custom ruby script like 

#rake my_custom_script

Chances are high that you would run into GEM dependencies errors even though you had mentioned all the required GEMS in Gemfile. 

To verify if the GEM in error have been installed by bundler or not, 

# grep gem_name Gemfile.lock

IF it exist , then the issue is the custom ruby script is pickingup up the wrong environment ie System-Wide location and not User-Home location. 

Solution :

#bundle exec rake my_custom_script

The “bundle exec” will ensure the custom rake task picks up the GEM used by the Bundler environment.

Customize Nginx config on Ruby1.9 Elastic Beanstalk

Requirement : Set a URL redirection in Nginx Configuration.

Example :

download.appygeek.com => https://play.google.com/store/apps/details?id=com.mobilesrepublic.appygeek

On Beanstalk with Phusion Passenger Standalone [3.0.17] (Ruby1.9), Nginx customization is highly discouraged. However to accomplish this, the following workaround is done :

Beanstalk generates the nginx configuration file from a ERB template each time when restarted. Hence the configuration change has to be made at the ERB template instead of Nginx configuration.

Location of the ERB Template file = /usr/share/ruby/1.9/gems/1.9.1/gems/passenger-3.0.17/lib/phusion_passenger/templates/standalone/config.erb

Following contents are appended before the last closing curly bracket:

server {
 listen 0.0.0.0:80;
 server_name download.appygeek.com;
 root '<%= app[:root] %>/public/test';
 index index.html;
}

File Saved, phusion-passenger-nginx configuration is combined and it is Restarted

/etc/init.d/passenger restart

Create the Dir /var/app/current/public/test and a file called index.html with the below contents in it:

<html>
<head>
<meta http-equiv="refresh" content="0; url=https://play.google.com/store/apps/details?id=com.mobilesrepublic.appygeek" />
</head>
</html>

Hence the Nginx is customized.

Note : For Permanent fix we have to take Custom AMI and launch the ElasticBeanstalk environment.

 

Click this URL on Nginx Customization @ AWS Forum

 

Full Access to a specific S3 Bucket except DeleteObject

{
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:GetBucketLocation",
                "s3:ListAllMyBuckets"
            ],
            "Resource": "arn:aws:s3:::*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:ListBucket"
            ],
            "Resource": [
                "arn:aws:s3:::testbucket-unni"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
              "s3:PutObject",
              "s3:GetObject"
              ],
            "Resource": [
                "arn:aws:s3:::testbucket-unni/*"
            ]
        }
    ]
}

Details:

  1. Get and List actions given to “arn:aws:s3:::*” to enable console view
  2. List action given by specifying exact ARN (without start) “arn:aws:s3:::testbucket-unni” to enable protection to other buckets if its name start “testbucket-unni”
  3. Put and Get actions given as “arn:aws:s3:::testbucket-unni/*” which means only to objects inside the bucket .

Install Newrelic Agent for PHP in a 1 minute

Install NewRElic PHP Plugin for Amazon LINux
Create newrelic account on web and get the License number.
sudo rpm -Uvh http://yum.newrelic.com/pub/newrelic/el5/x86_64/newrelic-repo-5-3.noarch.rpm

sudo yum install newrelic-php5
sudo newrelic-install install

vim /etc/php.ini
newrelic.license="4b3abfeda5336ecf68"
/etc/init.d/httpd restart

Install System Monitoring NewRelic

rpm -Uvh https://yum.newrelic.com/pub/newrelic/el5/x86_64/newrelic-repo-5-3.noarch.rpm

yum install newrelic-sysmond
nrsysmond-config --set license_key=4b106d772c3115f649

/etc/init.d/newrelic-sysmond start