如何在Cloud Foundry中为Java应用添加多个目标地？

Hi Sankeerth, great question! Adding a second destination to your app just requires updating the existing destinations environment variable with an additional entry in the JSON array. Here are two reliable ways to do this:

Method 1: Update the Environment Variable Directly #

Since cf set-env overwrites the existing value, you need to include both your original destination and the new one in the command. Use a valid JSON array (note the comma separating the two destination objects):

cf set-env firstapp destinations '[
  {
    "name": "ErpQueryEndpoint",
    "url": "https://URL",
    "username": "USER",
    "password": "PASSWORD"
  },
  {
    "name": "SecondDestination",
    "url": "https://SECOND_DESTINATION_URL",
    "username": "SECOND_USER",
    "password": "SECOND_PASSWORD"
  }
]'

Pro tip: While you can write the JSON on a single line, formatting it with line breaks makes it easier to read and avoid syntax errors.

Method 2: Safely Modify Existing Configuration #

If you want to avoid retyping your original destination details, follow these steps:

1. First, retrieve your current destinations configuration:

   cf env firstapp
   

   Look for the destinations entry under User-Provided Environment Variables and copy the entire JSON array.
2. Add your second destination object to the array (make sure to add a comma after the first object):

   [
     {
       "name": "ErpQueryEndpoint",
       "url": "https://URL",
       "username": "USER",
       "password": "PASSWORD"
     },
     {
       "name": "SecondDestination",
       "url": "https://SECOND_DESTINATION_URL",
       "username": "SECOND_USER",
       "password": "SECOND_PASSWORD"
     }
   ]
   

3. Update the environment variable with the modified JSON:

   cf set-env firstapp destinations 'PASTE_YOUR_MODIFIED_JSON_HERE'
   

Final Step: Apply the Changes #

After updating the environment variable, you need to restage your app for the changes to take effect:

cf restage firstapp

Restaging ensures the app picks up the new environment variables during the build process, which is more reliable than a simple restart for Java apps.

内容的提问来源于stack exchange，提问作者Sankeerth