Possibility to change the redis database number

README.md

@@ -831,6 +831,7 @@ Below is the complete list of available options that can be used to customize yo
 - **NGINX_X_FORWARDED_PROTO**: Advanced configuration option for the `proxy_set_header X-Forwarded-Proto` setting in the gitlab nginx vHost configuration. Defaults to `https` when `GITLAB_HTTPS` is `true`, else defaults to `$scheme`.
 - **REDIS_HOST**: The hostname of the redis server. Defaults to `localhost`
 - **REDIS_PORT**: The connection port of the redis server. Defaults to `6379`.
+- **REDIS_DB_NUMBER**: The redis database number. Defaults to '0'.
 - **UNICORN_WORKERS**: The number of unicorn workers to start. Defaults to `3`.
 - **UNICORN_TIMEOUT**: Sets the timeout of unicorn worker processes. Defaults to `60` seconds.
 - **SIDEKIQ_CONCURRENCY**: The number of concurrent sidekiq jobs to run. Defaults to `25`

assets/runtime/config/gitlabhq/resque.yml

@@ -1,4 +1,4 @@
 # If you change this file in a Merge Request, please also create
 # a Merge Request on https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests
 #
-production: redis://{{REDIS_HOST}}:{{REDIS_PORT}}
+production: redis://{{REDIS_HOST}}:{{REDIS_PORT}}/{{REDIS_DB_NUMBER}}

assets/runtime/env-defaults

@@ -50,6 +50,7 @@ esac
 ## REDIS
 REDIS_HOST=${REDIS_HOST:-}
 REDIS_PORT=${REDIS_PORT:-}
+REDIS_DB_NUMBER=${REDIS_DB_NUMBER:-0}
 
 ## SIDEKIQ
 SIDEKIQ_SHUTDOWN_TIMEOUT=${SIDEKIQ_SHUTDOWN_TIMEOUT:-4}

assets/runtime/functions

@@ -241,7 +241,7 @@ gitlab_finalize_redis_parameters() {
 
 gitlab_check_redis_connection() {
   timeout=60
-  while ! redis-cli -h ${REDIS_HOST} -p ${REDIS_PORT} ping >/dev/null 2>&1
+  while ! redis-cli -h ${REDIS_HOST} -p ${REDIS_PORT} -n ${REDIS_DB_NUMBER} ping >/dev/null 2>&1
   do
     timeout=$(expr $timeout - 1)
     if [[ $timeout -eq 0 ]]; then
@@ -263,7 +263,8 @@ gitlab_configure_redis() {
 
   update_template ${GITLAB_RESQUE_CONFIG} \
     REDIS_HOST \
-    REDIS_PORT
+    REDIS_PORT \
+    REDIS_DB_NUMBER
 }
 
 gitlab_configure_gitlab_workhorse() {