Configuring DataSource.groovy for Openshift for Grails - grails

Question

I'm trying to deploy a Grails application on Openshift.
I'm deploying the app using a locally built war file.
Right now, I am using the url given by the rhc-app-show command in the DataSource.groovy file for my Database configurations.
Whenever I try with the environment variables of Openshift (eg. $OPENSHIFT_MYSQL_DB_HOST), it crashes. Any idea or pointers on how to use those in the config file?
Thanks.

Answer 1

I haven't used OpenShift but Google led me to the FAQ which shows these environment variables:
OPENSHIFT_MYSQL_DB_HOST
OPENSHIFT_MYSQL_DB_PASSWORD
OPENSHIFT_MYSQL_DB_USERNAME
OPENSHIFT_MYSQL_DB_URL
OPENSHIFT_MYSQL_DB_PORT
so it looks like this would work:
production {
dataSource {
driverClassName = 'com.mysql.jdbc.Driver'
dialect = org.hibernate.dialect.MySQL5InnoDBDialect
String host = System.getenv('OPENSHIFT_MYSQL_DB_HOST')
String port = System.getenv('OPENSHIFT_MYSQL_DB_PORT')
String dbName = System.getenv('OPENSHIFT_APP_NAME')
url = "jdbc:mysql://$host:$port/$dbName"
username = System.getenv('OPENSHIFT_MYSQL_DB_USERNAME')
password = System.getenv('OPENSHIFT_MYSQL_DB_PASSWORD')
properties {
...
}
}
}
The missing bit is the database name - is that something that you would have available? I'm not sure of the format of OPENSHIFT_MYSQL_DB_URL but it looks like you might just be able to use url = "jdbc:${System.getenv('OPENSHIFT_MYSQL_DB_URL')}"

Answer 2

POSTGRES SQL ALSO ...there is a nice , tutorial for that on this link ...but the datasource configuration must be configured like this ....
production {
dataSource {
dbCreate = "update"
driverClassName = "org.postgresql.Driver"
dialect = org.hibernate.dialect.PostgreSQLDialect
uri = new URI(System.getenv('OPENSHIFT_POSTGRESQL_DB_URL'))
url = "jdbc:postgresql://"+uri.host+uri.path+"/"+System.getenv('OPENSHIFT_APP_NAME')
username = System.getenv('OPENSHIFT_POSTGRESQL_DB_USERNAME')
password = System.getenv('OPENSHIFT_POSTGRESQL_DB_PASSWORD')
}
second Alternative . . .
production {
dataSource {
dbCreate = "update"
driverClassName = "org.postgresql.Driver"
dialect = org.hibernate.dialect.PostgreSQLDialect
uri = new URI(System.getenv('OPENSHIFT_POSTGRESQL_DB_URL').toString())
appname = System.getenv('OPENSHIFT_APP_NAME').toString()
url = "jdbc:postgresql://"+uri.host.toString()+uri.path.toString()+"/"+appname
username = System.getenv('OPENSHIFT_POSTGRESQL_DB_USERNAME').toString()
password = System.getenv('OPENSHIFT_POSTGRESQL_DB_PASSWORD').toString()
}

Answer 3

In Grails 3.0.11, File application.yml
System.getenv doesn't work, so i had to configure manually the url connection for database in mysql.... Use the command of documentation https://developers.openshift.com/en/managing-port-forwarding.html
dataSource:
dbCreate: update
url : jdbc:mysql://thisIsTheUrlGetWithPort-ForwardCommandAndThePort:48381/server?verifyServerCertificate=false&autoReconnect=true&useSSL=false&requireSSL=false
driverClassName: com.mysql.jdbc.Driver
dialect: org.hibernate.dialect.MySQL5InnoDBDialect
username : admin9CzsS #this is a username example
password : RR7y9uKw3t #this is a password example
properties:
jmxEnabled: true
initialSize: 5
maxActive: 50
minIdle: 5
maxIdle: 25
maxWait: 10000
maxAge: 600000
timeBetweenEvictionRunsMillis: 5000
minEvictableIdleTimeMillis: 60000
validationQuery: SELECT 1
validationQueryTimeout: 3
validationInterval: 15000
testOnBorrow: true
testWhileIdle: true
testOnReturn: false
jdbcInterceptors: ConnectionState
defaultTransactionIsolation: 2 # TRANSACTION_READ_COMMITTED