https://github.com/weavejester/lein-beanstalk.git
git clone 'https://github.com/weavejester/lein-beanstalk.git'
(ql:quickload :weavejester.lein-beanstalk)
Leiningen plugin for Amazon's Elastic Beanstalk.
You will need an Amazon Web Services account, and know your account key and secret key.
You will also need to be signed up for Elastic Beanstalk.
To use lein-beanstalk, you'll need to add a few additional values to
your project.clj file.
First, add lein-beanstalk as a plugin:
clojure
:plugins [[lein-beanstalk "0.2.7"]]
or, if you're using a version of Leiningen prior to 1.7.0, add it to
your :dev-dependencies:
clojure
:dev-dependencies [[lein-beanstalk "0.2.7"]]
Then add a lein-beanstalk-credentials definition to your
~/.lein/init.clj file that contains your AWS credentials:
clojure
(def lein-beanstalk-credentials
{:access-key "XXXXXXXXXXXXXXXXXX"
:secret-key "YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY"})
Or, if you're using Leiningen 2, you can add the credentials to your
~/.lein/profiles.clj file:
clojure
{:user
{:aws {:access-key "XXXXXXXXXXXXXXXXXX"
:secret-key "YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY"}}}
Finally, lein-beanstalk uses lein-ring for packaging your
application, so all of lein-ring's configuration applies as well.
At a minimum, you'll need to your project.clj a reference to
your application's top-level handler, e.g.:
:ring {:handler hello-world.core/handler}See the documentation for lein-ring for more about the options it provides.
You should now be able to deploy your application to the Amazon cloud using the following command:
$ lein beanstalk deploy development
To get information about the application itself run
$ lein beanstalk info
Application Name : myapp
Description : My Awesome Compojure App
Last 5 Versions : 0.1.0-20110209030504
0.1.0-20110209030031
0.1.0-20110209025533
0.1.0-20110209021110
0.1.0-20110209015216
Created On : Wed Feb 09 03:00:45 EST 2011
Updated On : Wed Feb 09 03:00:45 EST 2011
Deployed Envs : development (Ready)
staging (Ready)
production (Terminated)
and information about a particular environment execute
$ lein beanstalk info development
Environment Id : e-lm32mpkr6t
Application Name : myapp
Environment Name : development
Description : Default environment for the myapp application.
URL : development-feihvibqb.elasticbeanstalk.com
LoadBalancer URL : awseb-myapp-46156215.us-east-1.elb.amazonaws.com
Status : Ready
Health : Green
Current Version : 0.1.0-20110209030504
Solution Stack : 32bit Amazon Linux running Tomcat 6
Created On : Tue Feb 08 08:01:44 EST 2011
Updated On : Tue Feb 08 08:05:01 EST 2011
To shutdown an existing environment use the following command
$ lein beanstalk terminate development
This terminates the environment and all of its resources, i.e. the Auto Scaling group, LoadBalancer, etc.
To remove any unused versions from the S3 bucket run
$ lein beanstalk clean
The Amazon Web Services account key and secret key should be
put into a lein-beanstalk-credentials definition in your
~/.lein/init.clj file:
clojure
(def lein-beanstalk-credentials
{:access-key "XXXXXXXXXXXXXXXXXX"
:secret-key "YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY"})
Keeping your credentials out of your project.clj file and out
of your project in general helps ensure you don't accidentally
commit your credentials to github et al.
However, If you want to deploy your application using beanstalk from
an environment like Jenkins, where you don't have control over the
user, you can export the credential to the environment from the build
script, and inside your project.clj, do:
clojure
(defproject my-project "0.1.0"
:description ...
:aws {
:access-key ~(System/getenv "AWS_ACCESS_KEY")
:secret-key ~(System/getenv "AWS_SECRET_KEY")})
Elastic Beanstalk environments can be defined in multiple ways in
the project.clj file.
If no environments are specified, lein-beanstalk will create three default environments
development (with CNAME prefix myapp-development)staging (with CNAME prefix myapp-staging)production (with CNAME prefix myapp)To override the default behavior, add an :aws key to your
project.clj file, either with :environments mapped to a
vector of envionment symbols:
clojure
:aws {:beanstalk {:environments [dev demo prod]
...}
...}
or to a vector of maps
clojure
:aws {:beanstalk {:environments [{:name "dev"}
{:name "demo"}
{:name "prod"}]
...}
...}
Given either of the above configurations, the following two
environents will be created:
dev (with CNAME prefix myapp-dev)demo (with CNAME prefix myapp-demo)prod (with CNAME prefix myapp-prod)The second option allows one to specify the CNAME prefix for each
environment
clojure
:aws {:beanstalk {:environments [{:name "dev"
:cname-prefix "myapp-development"}
{:name "staging"
:cname-prefix "myapp-demo"}
{:name "prod"
:cname-prefix "myapp"}]
...}
...}
By default the CNAME prefix is <project-name>-<environment>.
You can specify environment variables that will be added to the system
properties of the running application, per beanstalk environment:
clojure
:aws
{:beanstalk
{:environments
[{:name "dev"
:cname-prefix "myapp-dev"
:env {"DATABASE_URL" "mysql://..."}}]}}
If the environment variable name is a keyword, it is upper-cased and
underscores (“_”) are substituted for dashes (“-”). e.g.
:database-url becomes "DATABASE_URL".
Amazon Elastic Beanstalk uses
Amazon Simple Storage Service (S3) to store the versions
of the application. By default lein-beanstalk uses
lein-beanstalk.<project-name> as the S3 bucket name.
To use a custom bucket, specify it in the project.clj file:
clojure
:aws {:beanstalk {:s3-bucket "my-private-bucket"
...}}
You can specify the AWS region of to deploy the application to through
your project.clj file:
clojure
:aws {:beanstalk {:region "eu-west-1"}}
The following regions are recognized:
us-east-1 (default)ap-northeast-1eu-west-1us-west-1us-west-2Q: Why does my deployed web application still shows up as ‘red’ in the Elastic Beanstalk console?
A: Elastic Beanstalk sends a HTTP HEAD request to ‘/’ to check if
the application is running. Simply add the necessary handling to the
application. e.g. for Compojure add
clojure
(HEAD "/" [] "")