entrypoint.sh: default value of DB_TYPE is postgres

Closes sameersbn#418

Changelog.md

@@ -2,6 +2,9 @@
 
 This file only reflects the changes that are made in the the docker image. Please refer to the upstream GitLab [CHANGELOG](https://github.com/gitlabhq/gitlabhq/blob/master/CHANGELOG) for the list of changes in GitLab.
 
+**latest**
+- set default value of `DB_TYPE` to `postgres`
+
 **7.14.3**
 - gitlab: upgrade to CE v.7.14.3
 

README.md

@@ -752,7 +752,7 @@ Below is the complete list of available options that can be used to customize yo
 - **SIDEKIQ_CONCURRENCY**: The number of concurrent sidekiq jobs to run. Defaults to `25`
 - **SIDEKIQ_SHUTDOWN_TIMEOUT**: Timeout for sidekiq shutdown. Defaults to `4`
 - **SIDEKIQ_MEMORY_KILLER_MAX_RSS**: Non-zero value enables the SidekiqMemoryKiller. Defaults to `1000000`. For additional options refer [Configuring the MemoryKiller](http://doc.gitlab.com/ce/operations/sidekiq_memory_killer.html)
-- **DB_TYPE**: The database type. Possible values: `mysql`, `postgres`. Defaults to `mysql`.
+- **DB_TYPE**: The database type. Possible values: `mysql`, `postgres`. Defaults to `postgres`.
 - **DB_HOST**: The database server hostname. Defaults to `localhost`.
 - **DB_PORT**: The database server port. Defaults to `3306` for mysql and `5432` for postgresql.
 - **DB_NAME**: The database database name. Defaults to `gitlabhq_production`

entrypoint.sh

@@ -210,6 +210,9 @@ if [[ -z ${DB_HOST} ]]; then
   exit 1
 fi
 
+# DB_TYPE defaults to postgres
+DB_TYPE=${DB_TYPE:-postgres}
+
 # use default port number if it is still not set
 case ${DB_TYPE} in
   mysql) DB_PORT=${DB_PORT:-3306} ;;