Metadata Management Tool Application

The Metadata Management Tool is a web application to assist users in managing metadata on various Nasa.gov applications.

Getting Started

Requirements

Ruby 2.2.2

Setup

Clone the Metadata Management Tool Git project:

git clone https://<username>@git.earthdata.nasa.gov/scm/mmt/mmt_app.git

Type the following command to install the necessary components:

bundle install

Depending on your version of Ruby, you may need to install ruby rdoc/ri data:

<= 1.8.6 : unsupported
 = 1.8.7 : gem install rdoc-data; rdoc-data --install
 = 1.9.1 : gem install rdoc-data; rdoc-data --install
>= 1.9.2 : you're good to go!

Check your /config/ directory for a database.yml file (with no additional extensions). If you do not have one, duplicate* the database.yml.example file and then rename it to database.yml.

*Note: Do not simply rename the database.yml.example file as it is being tracked in Git and has its own history.

Next, create your database by running the standard rails command:

rake db:create

And then to migrate the database schema, run the standard rails command:

rake db:migrate

Usage

To start the project, just type the default rails command:

rails s

And if you need to stop the server from running, hit Ctrl + C and the server will shutdown.

Running a local copy of CMR

In order to use a local copy of the CMR you will need to download the latest file and ingest some sample data.

Go to this page https://ci.earthdata.nasa.gov/browse/CMR-CSB/latestSuccessful/artifact/
Download the cmr-dev-system-uberjar.jar file.
- Note: It will rename itself to cmr-dev-system-0.1.0-SNAPSHOT-standalone.jar. This is the correct behavior. DO NOT rename the file.
In your root directory for MMT, create a folder named cmr.
Place the cmr-dev-system-0.1.0-SNAPSHOT-standalone.jar file in the cmr folder from Step #3.

To start the local CMR and load data*:

rake cmr:start_and_load

After you see "Done!", you can load the app in your browser and use the local CMR. After you have started CMR, to just reload the data:

rake cmr:load

To stop the locally running CMR, run this command:

rake cmr:stop

You will need to stop the CMR before upgrading to a new CMR version. Note: stopping the running CMR for any reason will delete all data from the CMR. You will have to load the data again when you start it.

Inserting Sample Drafts

You can insert sample drafts into your local database. These commands use the first user in the database (should only be one), and add the drafts to your current provider, so make sure you login to the system and select a provider or the commands will fail.

To insert a sample draft that only has the required fields present:

rake drafts:load_required

To insert a sample draft with every field completed:

rake drafts:load_full

Troubleshooting

OpenSSL Issue

*If you have a similar error from rake cmr:start_and_load below:

Faraday::Error::ConnectionFailed: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed

Try the following steps:

Ensure you are using RubyGems 2.0.3 or newer by typing gem -v. If it is older, type gem update --system to upgrade the RubyGems system.
Update the SSL certificates by running the following commands
- brew update
- brew install openssl
- brew link openssl --force
Restart your terminal to refresh the OpenSSL version.
Check to ensure that OpenSSL version is 1.0.2 or newer with the command openssl version
Try running rake cmr:start and rake cmr:load as instructed above. If you still have issues, continue with these instructions below:
Uninstall Ruby 2.2.2. If you are using rvm, use the command rvm remove 2.2.2
Find out where your OpenSSL directory is by typing which openssl. An example directory you might get would be /usr/local/bin/openssl
Reinstall Ruby with the following command (if you are using rvm): rvm install 2.2.2 --with-open-ssl-dir={DIRECTORY FROM STEP 7}.
- Using the example directory from above, it would be rvm install 2.2.2 --with-open-ssl-dir=/usr/local/bin/openssl.
Run bundle install to install any missing gems.
- If your terminal tells you that it does not recognize the bundle command, run gem install bundler
Restart your terminal to refresh all settings.
Navigate to MMT directory and check to make sure Ruby and OpenSSL version are correct.
Run rake cmr:start and rake cmr:load again. If you still have issues, please reach out to a developer to help with troubleshooting.

UMM JSON-Schema

You can view/download the latest UMM JSON-Schema here, https://git.earthdata.nasa.gov/projects/CMR/repos/cmr/browse/umm-spec-lib/resources/json-schemas

Local Testing

JavaScript

MMT uses PhantomJS which allows us to run our Capybara tests on a headless WebKit browser. Before you're able to run tests locally you'll need to install it. The easiest way to accomplish this would be to use Homebrew or a similar packager manager. If you're using Homebrew, run the following the command:

brew install phantomjs

VCR

MMT uses VCR to record non-localhost HTTP interactions, it is configured in spec/support/vcr.rb.

All calls to localhost are ignored by VCR and therefore will not be recorded.

This isn't an issue normally but with MMT we run a number of services locally while developing that we would like to be recorded.

CMR

For calls to CMR that are asyncronous, we do have a method of waiting for those to finish, syncronously. Within the spec/helpers/cmr_helper.rb we have a method called wait_for_cmr that makes two calls to CMR and ElasticSearch to ensure all work is complete. This should ONLY be used within tests.

Testing against ACLs

When testing functionality in the browser that requires specific permissions you'll need to ensure your environment is setup properly and you're able to assign yourself the permissions necessary. This includes:

Creating a Group
Add your URS account as a member of the group
Give your URS account access to the MMT Users Group

This provides access to the Provider Object Permissions pages.

Give your URS account access to the MMT Admins Group

This gives you permission to view system level groups.

From here you'll need to visit the Provider Object Permissions page, and find your group, from here you'll be able to modify permissions of the group so that you can test functionality associated with any of the permissions.

Automating ACL Group Management

To run the above steps automatically there is a provided rake task to do the heavy lifting.

rake acls:testing:prepare[URS_USERNAME]

Replacing URS_USERNAME with your own username. An example:

$ rake acls:testing:prepare[username]
[Success] Group `USERNAME Testing Group` created.
[Success] Added username to MMT Users
[Success] Added username to MMT Admins

From here I'm able to visit /provider_identity_permissions and see my newly created group. Clicking on it allows me to grant myself Provider Level Access to the necessary targets for testing.

Replicating SIT Collections Locally

Often we need collections to exist in our local CMR that already exist in SIT for the purposes of sending collection ids (concept ids) as part of a payload to the ECHO API that doesn't run locally, but instead on testbed. In order to do this the collection concept ids have to match those on SIT so we cannot simply download and ingest them. A rake task exists to replicate collections locally for this purpose.

$ rake collections:replicate

The task accepts two parameters

provider: The provider id to replicate collections for default: MMT_2
page_size: The number of collections to request default: 25

Examples

$ rake collections:replicate[provider=MMT_1,amount=10]

Will download at most 10 collections from MMT_1.

$ rake collections:replicate[provider=SEDAC]

Will download at most 25 collections from SEDAC.

NOTE Some providers have permissions set on their collections and make require a token to view/download collections. You can set an ENV variable named

CMR_SIT_TOKEN

that if set, will be provided to CMR when downloading collections. This variable is set by adding the following line to your ~/.bash_profile

export CMR_SIT_TOKEN=""

After adding the line and saving the file, don't forget to source the file.

source ~/.bash_profile

steadyflux/mmt