增加数据库访问配置文件

config/database.yml.example

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+# Default setup is given for MySQL with ruby1.9. If you're running Redmine
+# with MySQL and ruby1.8, replace the adapter name with `mysql`.
+# Examples for PostgreSQL, SQLite3 and SQL Server can be found at the end.
+# Line indentation must be 2 spaces (no tabs).
+
+production:
+  adapter: mysql2
+  database: redmine
+  host: localhost
+  username: root
+  password: ""
+  encoding: utf8
+
+development:
+  adapter: mysql2
+  database: redmine_development
+  host: 10.107.17.20
+  username: root
+  password: "1234"
+  encoding: utf8
+
+# Warning: The database defined as "test" will be erased and
+# re-generated from your development database when you run "rake".
+# Do not set this db to the same as development or production.
+test:
+  adapter: mysql2
+  database: redmine_test
+  host: 10.107.17.20
+  username: root
+  password: "1234"
+  encoding: utf8
+
+# PostgreSQL configuration example
+#production:
+#  adapter: postgresql
+#  database: redmine
+#  host: localhost
+#  username: postgres
+#  password: "postgres"
+
+# SQLite3 configuration example
+#production:
+#  adapter: sqlite3
+#  database: db/redmine.sqlite3
+
+# SQL Server configuration example
+#production:
+#  adapter: sqlserver
+#  database: redmine
+#  host: localhost
+#  username: jenkins
+#  password: jenkins