Question

I’m trying to connect my application to Shared Database 5MB using grails tutorial. I’m using grails 2.1.0. On my local machine when I run heroku config I can see that DATABASE_URL is set, but after executing git push… my build stops with error:

Error packaging application: Error loading DataSource.groovy: null (Use --stacktrace to see the full trace)
Failed to build app
Heroku push rejected, failed to compile Grails app

So I’ve added logging to see how environment looks on heroku. I’ve added println System.env to Datasource.groovy and I cannot find any DATABASE_URL:

.[OLDPWD:/app/tmp/repo.git/.cache, SHELL:/bin/bash, SHLVL:2, GIT_DIR:., JAVA_HOME:/usr/lib/jvm/java-6-openjdk, PATH:/app/tmp/repo.git/.cache/.grails/bin::/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin, SSH_CLIENT:XXX, MAIL:XXX, USER:XXX, LOG_TOKEN:t.9e79a5be-dfa2-446e-9f83-f6b4ebbc4eb7, GRAILS_HOME:/app/tmp/repo.git/.cache/.grails, PWD:XXX, HOME:/app/, LOGNAME:u11846, _:/app/tmp/repo.git/.cache/.grails/bin/grails, SSH_CONNECTION:XXX, LD_LIBRARY_PATH:/usr/lib/jvm/java-6-openjdk/jre/lib/amd64/server:/usr/lib/jvm/java-6-openjdk/jre/lib/amd64:/usr/lib/jvm/java-6-openjdk/jre/../lib/amd64]

I have checked with heroku addons that for my application shared database is installed:

heroku addons
=== XXX Configured Add-ons
shared-database:5mb

and when I execute heroku config

heroku config
=== Config Vars for XXX

DATABASE_URL:        postgres://XXX
JAVA_OPTS:           -Xmx384m -Xss512k -XX:+UseCompressedOops
SHARED_DATABASE_URL: postgres://XXX

Datasource.groovy:

production {
    dataSource {
        dbCreate = "update"
        driverClassName = "org.postgresql.Driver"
        dialect = org.hibernate.dialect.PostgreSQLDialect

        println System.env
        println System.env.DATABASE_URL
        uri = new URI(System.env.DATABASE_URL)
        println uri

        url = "jdbc:postgresql://" + uri.host + uri.path
        username = uri.userInfo.split(":")[0]
        password = uri.userInfo.split(":")[1]
    }
}

In BuildConfig.groovy I’ve added

runtime 'postgresql:postgresql:8.4-702.jdbc3'

I can launch application locally with DATABASE_URL set to local postgresql. I’m building war and running it on jetty.

Can anyone tell me what am I missing?

Answer 1

The application environment variables are not available at build time. Your code needs to be able to handle that accordingly. Or you can enable the new user_env_compile Heroku Labs feature that does enable the environment variables to be there at build time: https://devcenter.heroku.com/articles/labs-user-env-compile