ember-cli-deploy-mysql

Deploy your Ember.js index to MySQL

This plugin, lovingly cribbed from ember-cli-deploy-redis, uploads the contents of a file, presumably index.html, to a specified MySQL table. Systems compatible with the MySQL protocol such as MariaDB are also supported.

More often than not this plugin will be used in conjunction with the lightning method of deployment where the Ember.js application assets will be served from S3 and the index.html file will be served from a key-value store of some kind; in this case, a MySQL table. However, it can be used to upload the contents of any file.

What is an ember-cli-deploy plugin?

A plugin is an addon that can be executed as a part of the ember-cli-deploy pipeline. A plugin will implement one or more of the ember-cli-deploy's pipeline hooks.

For more information on what plugins are and how they work, please refer to the Plugin Documentation.

Why would I use this instead of ember-cli-deploy-redis?

That's a great question. Redis is a much better solution for this kind of problem and you can do neat things like serve directly from NGINX. MySQL, on the other hand, isn't really set up well for key-value storage and retrieval, and it ends up being a somewhat clumsy solution.

In our case, we were only using Redis for this particular function, so it seemed overkill to be running the service (and maintaining a connection pool to it in our Ruby application). Also, our API responses (including the Ember.js index) are already being cached (thanks to a caching reverse proxy), so talk about redundant layers! It makes more sense for us, for now, to serve the index from MySQL and let our reverse proxy cache it. Perhaps your situation is similar?

Quick Start

To get up and running quickly, do the following:

• Ensure ember-cli-deploy-build is installed and configured.

• Install this plugin:

$ ember install ember-cli-deploy-mysql

• Place the following configuration into config/deploy.js:

ENV.mysql = {
  user: '<your-mysql-user>',
  password: '<your-mysql-password>',
  database: '<your-mysql-database>'
}

• Run the pipeline:

$ ember deploy <environment>

Installation

Run the following command in your terminal:

ember install ember-cli-deploy-mysql

ember-cli-deploy Hooks Implemented

For detailed information on what plugin hooks are and how they work, please refer to the Plugin Documentation.

• configure
• upload
• willActivate
• activate
• didDeploy

Configuration Options

For detailed information on how configuration of plugins works, please refer to the Plugin Documentation.

host

The MySQL host. If url is defined, then this option is not needed.

Default: 'localhost'

port

The MySQL port. If url is defined, then this option is not needed.

Default: 3306 or context.tunnel.srcPort if present (set by ember-cli-deploy-ssh-tunnel)

database

The MySQL database name. If url is defined, then this option is not needed.

user

The MySQL user name. If url is defined, then this option is not needed.

password

The MySQL password. If url is defined, then this option is not needed.

You can create a .env.deploy.<environment> file in your project root to store "secrets" like database passwords (e.g. MYSQL_PASSWORD=bananasplit) and reference these values in your config/deploy.js as process.env.<key> (e.g. process.env.MYSQL_PASSWORD). You should add any and all such "secret" files to your .gitignore to prevent them from being inadvertently checked in!

url

A MySQL connection URL:

Example: 'mysql://some-user:some-password@some-host/some-db'

See the node-mysql documentation for more information.

filePattern

A file matching this pattern will be uploaded to the MySQL table.

Default: 'index.html'

distDir

The root directory where the file matching filePattern will be searched for. By default, this option will use the distDir property of the deployment context.

Default: context.distDir

tableName

The name of the table to be used to store the revision keys and file contents in MySQL. By default this option will use the project.name() property from the deployment context.

Default: context.project.name().replace(/-/g, '_') + '_bootstrap'

The table is created in your database automatically on the initial deploy, so your MySQL user will need create table privileges! Here is the DDL in case you want to create it separately, in advance:

CREATE TABLE `your_project_name_bootstrap` (
  `id` int AUTO_INCREMENT,
  `key` varchar(255) NOT NULL,
  `value` text NOT NULL,
  `gitsha` binary(20), -- reserved for future use 
  `deployer` varchar(255), -- reserved for future use 
  `created_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `NATURAL` (`key`)
);

Which should create a table that looks like:

revisionKey

The unique revision number for the version of the file being uploaded to MySQL. By default this option will use either the revisionKey passed in from the command line or the revisionData.revisionKey property from the deployment context.

Default: context.commandLineArgs.revisionKey || context.revisionData.revisionKey

allowOverwrite

A flag to specify whether the revision should be overwritten if it already exists in the MySQL table.

Default: false

deployClient

The MySQL client to be used to upload files to the MySQL table. By default this option will use a new instance of the MySQL client. This allows for injection of a mock client for testing purposes.

Default: return new MySQL(options)

didDeployMessage

A message that will be displayed after the file has been successfully uploaded to MySQL. By default this message will only display if the revision for revisionData.revisionKey of the deployment context has been activated.

maxRecentUploads

The maximum number of recent revisions to keep in the MySQL table.

Default: 10

Activation

As well as uploading a file to MySQL, ember-cli-deploy-mysql has the ability to mark a revision of a deployed file as current. This is most commonly used in the lightning method of deployment whereby an index.html file is pushed to a key-value store and then served to the user by the application.

The application could be configured to return any existing revision of the index.html file as requested by a query parameter. However, the revision marked as the currently active revision would be returned if no query parameter is present. For more detailed information on this method of deployment please refer to the ember-cli-deploy-lightning-pack README.

How do I activate a revision?

A user can activate a revision by either:

• Passing a command line argument to the deploy command:

$ ember deploy <environment> --activate

• Running the deploy:activate command:

$ ember deploy:activate <environment> --revision=<revision-key>

• Setting the activateOnDeploy flag in config/deploy.js

ENV.pipeline = {
  activateOnDeploy: true
}

What does activation do?

When ember-cli-deploy-mysql uploads a file to MySQL, it uploads to the table defined by the tableName config property, with a key defined by the revisionKey config property. So if there have been three revisons deployed, MySQL might look something like this:

$ mysql -u root foo
 
MariaDB [foo]> select `key`, left(`value`, 10) from bar_bootstrap;
+----------------------------------+-------------------+
| key                              | left(`value`, 10) |
+----------------------------------+-------------------+
| cc9d9af44ad70f4a6732c1c13deb246e | <!DOCTYPE         |
| 071be39412920947613c00d680b8e9c0 | <!DOCTYPE         |
| d56d56274aac91e229fa69f34f4cf81d | <!DOCTYPE         |
+----------------------------------+-------------------+

Activating a revison would add a new entry to the MySQL table pointing to the selected revision:

$ ember deploy:activate production --revision=cc9d9af44ad70f4a6732c1c13deb246e
✔ Activated revision `cc9d9af44ad70f4a6732c1c13deb246e`
$ mysql -u root foo
 
MariaDB [foo]> select `key`, left(`value`, 10) from bar_bootstrap;
+----------------------------------+-------------------+
| key                              | left(`value`, 10) |
+----------------------------------+-------------------+
| cc9d9af44ad70f4a6732c1c13deb246e | <!DOCTYPE         |
| 071be39412920947613c00d680b8e9c0 | <!DOCTYPE         |
| d56d56274aac91e229fa69f34f4cf81d | <!DOCTYPE         |
| current                          | cc9d9af44a        |
+----------------------------------+-------------------+

When does activation occur?

Activation occurs during the activate hook of the pipeline. By default, activation is turned off and must be explicitly enabled by one of the three methods described above.

What if my MySQL server isn't publicly accessible?

Not to worry! Just install the handy-dandy ember-cli-deploy-ssh-tunnel plugin:

ember install ember-cli-deploy-ssh-tunnel

And set up your config/deploy.js similar to the following:

ENV = {
  mysql: {
    database: 'your-mysql-database',
    user: 'your-mysql-user',
    password: process.env.MYSQL_PASSWORD
  },
  'ssh-tunnel': {
    username: 'your-ssh-username',
    host: 'remote-mysql-host'
  }
}

What if my MySQL server is only accessible from my remote server?

Sometimes you need to SSH into a server (a "bastion" server) and then run mysql or similar from there. This is really common if you're using RDS on AWS, for instance. We've got you covered there, too: just set your SSH tunnel host to the bastion server and tell the tunnel to use your MySQL server as the destination host, like so:

ENV = {
  mysql: {
    database: 'your-mysql-database',
    user: 'your-mysql-user',
    password: process.env.MYSQL_PASSWORD
  },
  'ssh-tunnel': {
    username: 'your-ssh-username',
    host: 'remote-mysql-client',
    dstHost: 'remote-mysql-server'
  }
}

Prerequisites

The following properties are expected to be present on the deployment context object:

• distDir (provided by ember-cli-deploy-build)
• project.name() (provided by ember-cli-deploy)
• revisionData.revisionKey (provided by ember-cli-deploy-revision-data)
• commandLineArgs.revisionKey (provided by ember-cli-deploy)
• deployEnvironment (provided by ember-cli-deploy)

The following properties are used if present on the deployment context object:

• tunnel.srcPort (provided by ember-cli-deploy-ssh-tunnel)