You can specify a set of environment variables specific to each application. You can use these environment variables to change settings for an application at any time after you deploy the application. Environment variables that are specified for an application cannot be applied to a different application. You can specify the same environment variable for multiple applications but the value of the environment variable is unique to each application.
Configure environment variables
- On the Configurations tab of the Environment Details page, view the Start Configuration field.
- Enter a Variable Name and Variable Value. If you want to add more environment variables, click Add.
Notice Predefined environment variables have a higher priority than console settings. Do not repeatedly configure environment variables. This prevents console settings from being overridden.
- After the configuration is complete, click Change Configuration in the upper-right corner of the Configurations page to enable the configurations.
Predefined environment variables
In addition to custom environment variables, Web+ provides with you predefined environment variables. You can configure these environment variables based on your requirements. The following table lists these environment variables, sample values, and the description of each environment variable.
| Variable name | Example | Description |
|---|---|---|
| WP_ENV_ID | we-5d3e9e9a4cb0d77689e9**** | The ID of the environment. |
| WP_ENV_NAME | test_env | The name of the environment. |
| WP_ENV_CREATE_USER | test.user | The name of the user who creates the environment. |
| WP_ENV_CREATE_TIME | 1564384923001 | The creation time for the environment. |
| WP_CHANGE_ID | wc-5d3f096e4cb0d77689e9**** | The update ID of the latest environment change. |
| WP_CHANGE_TRIGGER_FROM | Console | The source from which the latest environment change initiates. |
| WP_CHANGE_TRIGGER_USER | test.user | The user who initiates the latest environment change. |
| WP_CHANGE_NAME | apply.env | The name of the update for the latest environment change. |
| WP_CHANGE_CREATE_TIME | 1564412270849 | The start time of the latest environment change. |
| WP_CHANGE_REQUEST_ID | 911B19AF-DB53-450D-84FB-2A2307DC**** | The request ID for the latest environment change. |
| WP_APP_ID | wa-5d3e9e994cb0d77689e9**** | The ID of the application. |
| WP_APP_NAME | test_app | The application name. |
| WP_APP_CATEGORY | PHP | The technology stack type of the application. |
| WP_APP_CREATE_TIME | 1564384921921 | The creation time of the application. |
| WP_APP_CREATE_USER | test.user | The name of the user who creates the application. |
| WP_PKG_VERSION_ID | wp-5d3e9e9a4cb0d77689e9**** | The version ID of the deployment package. |
| WP_PKG_VERSION_LABEL | 20190729.152153 | The version of the deployment package. |
| WP_PKG_VERSION_ETAG | 266FB8E532E1D924BDAFC65A261E**** | The ETag value of the deployment package version. The value is produced by using the MD5 message-digest algorithm. |
| WP_PKG_VERSION_SOURCE | resources/Php1/versions/20190729.152153/webplus-demo-php.zip | The storage path of the deployment package for the version. |
| WP_PKG_VERSION_CREATE_TIME | 1564384922317 | The creation time of the deployment package version. |
| WP_PKG_VERSION_CREATE_USER | test.user | The user who creates the deployment package version. |
| WP_INSTANCES_ID | i-2ze2u0df969vuwow**** | The ID of the ECS instance. |
| WP_INSTANCES_PRIVATE_IP | 172.17.82.37 | The private IP address of the ECS instance. |
| WP_RDS_ENGINE | MySQL | The database engine for the ApsaraDB for RDS instance. |
| WP_RDS_CONNECTION_ADDRESS | rm-2ze49r7276jbi****.mysql.rds.aliyuncs.com | The internal endpoint of the ApsaraDB for RDS instance. |
| WP_RDS_PORT | 3306 | The port number of the ApsaraDB for RDS instance. |
| WP_RDS_ACCOUNT_NAME | webplus | The account name of the ApsaraDB for RDS instance. |
| WP_RDS_ACCOUNT_PASSWORD | ***** | The password of the ApsaraDB for RDS instance. |
| WP_RDS_DATABASE | webplus | The name of the ApsaraDB for RDS instance. |
| APP_HOME | /home/admin/app/testapp | The local folder of the deployment package. |
| TOMCAT_HOME | /home/admin/tomcat8 | The installation folder of Tomcat. |
| WP_SERVICE_PORT | 8080 | The service port. |
- When you log on to an ECS instance by using Secure Shell (SSH), environment variables that are specified in Web+ will not be loaded.
- Web+ cannot automatically configure a service port for applications of the following technology stack types: Java, Go, Node.js, and Native. You can change the value of the $WP_SERVICE_PORT environment variable to configure a service port to avoid health check failures.