How to retrieve Application Property Sources from a Spring Cloud Services for TAS Config Server
Article ID: 377013
Updated On:
Products
Issue/Introduction
This article demonstrates the steps to retrieve application's environment variables used to enumerate property sources and publish them at a JSON endpoint.
The HTTP service has resources in the following form:
/{application}/{profile}[/{label}]
Environment
Spring Cloud Service for TAS
Resolution
The following steps retrieves the property sources from the config-server service instance.
1. Retrieve the client_id and client_secret for the config-server service instance using How to retrieve service credentials for a service instance bind to an application
2. Open a terminal session.
3. SSH to your Ops Manager VM
ssh ubuntu@<opsman-url-or-IP>
4. Target your UAA server by running
uaac target uaa.UAA-DOMAIN
where UAA-DOMAIN is the domain of your UAA server
Example:
uaac target https://uaa.system,example.com
5. Authenticate and obtain an access token for the service credentials from the UAA server by running
uaac token client get <client_id> -s <client_secret>
where: client_id and client_secret recorded in Step #1.
Example:
$ uaac token client get config-client-BINDING_GUID -s mysecret
WARNING: Decoding token without verifying it was signed by its authoring UAA
Successfully fetched token via client credentials grant.
Target: https://uaa.system.example.com
Context: config-client-BINDING_GUID, from client config-client-BINDING_GUID
6. Retrieve access token by running
export APP_TOKEN=`uaac context | grep access_token | awk '{print $2}'`
7. Verify access token
echo $APP_TOKEN
8. Get Property Sources from the config-server endpoint URL
curl -k -H "Authorization: bearer $APP_TOKEN" -H "Accept: application/json" https://<CONFIG-SERVER-ROUTE-URL>/<SPRING_APPLICATION_NAME>/<PROFILE>/<LABEL> | jq
Example:
Using:
SPRING_APPLICATION_NAME = cook
PROFILE = development
LABEL = main
$ curl -k -H "Authorization: bearer $APP_TOKEN" -H "Accept: application/json" https://config-server-GUID.cfapps.example.com/cook/development/main | jq
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 349 0 349 0 0 321 0 --:--:-- 0:00:01 --:--:-- 321
{
"name": "cook",
"profiles": [
"development"
],
"label": "main",
"version": null,
"state": null,
"propertySources": [
{
"name": "credhub-cook-development-main",
"source": {
"secretMenu": "tacos-dev"
}
},
{
"name": "ssh://mirror@<IP>:22/var/vcap/store/mirror/00957ad15f043b124e46eb212e90c4c8/cook-config/cook.properties",
"source": {
"cook.special": "Pickled Cactus"
}
}
]
}
Additional Information
The application will execute multiple request to the config server and evaluate Property Sources
For example using:
SPRING_APPLICATION_NAME=cook
SPRING_PROFILES_ACTIVE=DEVELOPMENT
Enumeration sequence:
- GET /application/default
- GET /cook/development
- GET /cook/default
Sample app logs.
2024-09-10T15:15:20.37-0600 [APP/PROC/WEB/0] OUT 2024-09-10T21:15:20.377Z INFO 13 --- [cook] [ main] o.s.c.c.c.ConfigServerConfigDataLoader : Fetching config from server at : https://config-server-8acb8291-547e-41f8-9ade-05438101f53c.cfapps.example.com
2024-09-10T15:15:20.37-0600 [APP/PROC/WEB/0] OUT 2024-09-10T21:15:20.377Z INFO 13 --- [cook] [ main] o.s.c.c.c.ConfigServerConfigDataLoader : Located environment: name=application, profiles=[default], label=null, version=null, state=null
2024-09-10T15:15:20.37-0600 [APP/PROC/WEB/0] OUT 2024-09-10T21:15:20.378Z INFO 13 --- [cook] [ main] o.s.c.c.c.ConfigServerConfigDataLoader : Fetching config from server at : https://config-server-8acb8291-547e-41f8-9ade-05438101f53c.cfapps.example.com
2024-09-10T15:15:20.37-0600 [APP/PROC/WEB/0] OUT 2024-09-10T21:15:20.378Z INFO 13 --- [cook] [ main] o.s.c.c.c.ConfigServerConfigDataLoader : Located environment: name=cook, profiles=[development], label=null, version=null, state=null
2024-09-10T15:15:20.37-0600 [APP/PROC/WEB/0] OUT 2024-09-10T21:15:20.378Z INFO 13 --- [cook] [ main] o.s.c.c.c.ConfigServerConfigDataLoader : Fetching config from server at : https://config-server-8acb8291-547e-41f8-9ade-05438101f53c.cfapps.example.com
2024-09-10T15:15:20.37-0600 [APP/PROC/WEB/0] OUT 2024-09-10T21:15:20.378Z INFO 13 --- [cook] [ main] o.s.c.c.c.ConfigServerConfigDataLoader : Located environment: name=cook, profiles=[default], label=null, version=null, state=null
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