Salt deployment for DynamoDB local development server

check_version.sh

#!/bin/bash

URL=$1
DYNAMODB_PATH=$2
FULL_URL=$(curl -sI $1 | awk '/Location/{gsub(/Location: /, ""); print}')
LATEST_VERSION=$(echo $FULL_URL | cut -d _ -f 3 | sed 's/\..*//')
VERSION_FILE=$2/VERSION
INSTALLED_VERSION=$([[ -f $VERSION_FILE ]] && cat $VERSION_FILE || echo "NOT INSTALLED")

# if we couldn't extract location from headers (i.e., there's a problem with
# the http request) to get the latest version, bail out without producing
# output so we don't indicate there are changes
[[ $LATEST_VERSION = "" ]] && exit 0

# check the versions and if they're different, produce output to satisfy the
# stateful behavior of cmd.run
[[ $INSTALLED_VERSION = $LATEST_VERSION ]] || echo "changed=true comment='new version is available'"

dynamodb-vhost.conf.jinja

server {
    server_name _;
    listen 80;

    location / {
        proxy_pass http://localhost:{{ port }};
    }
}

dynamodb.service.jinja

start on (local-filesystems and runlevel [2345])
stop on runlevel [016]

chdir {{ dynamodb_path }}

setuid {{ user }}
setgid {{ group }}

exec java -Djava.library.path=. -jar DynamoDBLocal.jar -port {{ port }}

dynamodb.sls

{% set dynamodb_path = '/opt/dynamodb' %}
{% set url = 'http://dynamodb-local.s3-website-us-west-2.amazonaws.com/dynamodb_local_latest.tar.gz' %}
{% set user = 'nobody' %}
{% set group = 'nogroup' %}
{% set port = 8088 %}


java_is_installed:
  pkg.installed:
    - name: openjdk-7-jre-headless


installed_dynamodb_is_latest:
  cmd.script:
    - source: salt://dynamodb/files/check_version.sh
    - args: {{ url }} {{ dynamodb_path }}
    - stateful: True


dynamodb_path_exists:
  file.directory:
    - name: {{ dynamodb_path }}
    - user: {{ user }}
    - group: {{ group }}


dynamodb_is_installed:
  cmd.wait_script:
    - source: salt://dynamodb/files/install.sh
    - args: {{ url }} {{ dynamodb_path }}
    - cwd: {{ dynamodb_path }}
    - require:
      - file: dynamodb_path_exists
      - pkg: java_is_installed
    - watch:
      - cmd: installed_dynamodb_is_latest


dynamodb_service_is_configured:
  file.managed:
    - name: /etc/init/dynamodb.conf
    - source: salt://dynamodb/templates/dynamodb.service.jinja
    - template: jinja
    - context:
        dynamodb_path: {{ dynamodb_path }}
        user: {{ user }}
        group: {{ group }}
        port: {{ port }}
    - require:
      - cmd: dynamodb_is_installed


dynamodb_nginx_vhost_is_configured:
  file.managed:
    - name: /etc/nginx/conf.d/dynamodb.conf
    - source: salt://dynamodb/templates/dynamodb-vhost.conf.jinja
    - template: jinja
    - context:
        port: {{ port }}
    - require:
      - file: dynamodb_service_is_configured
      - pkg: nginx
    - watch_in:
      - service: nginx


dynamodb_is_running:
  service.running:
    - name: dynamodb
    - enable: true
    - watch:
      - cmd: dynamodb_is_installed

install.sh

#!/bin/bash
cd $2

FULL_URL=$(curl -sI $1 | awk '/Location/{gsub(/Location: /, ""); print}')
LATEST_VERSION=$(echo $FULL_URL | cut -d _ -f 3 | sed 's/\..*//')

curl -LO $1
tar xzf dynamodb_local_latest.tar.gz && echo $LATEST_VERSION > VERSION