已开发带查询与交易的Hyperledger Composer应用，能否用Fauxton对接暴露的Docker容器？

Absolutely feasible! Let me walk you through how to make this work—Hyperledger Composer integrates smoothly with CouchDB, which comes with Fauxton (its built-in web admin interface) out of the box. You can absolutely connect to your Composer-backed CouchDB instance via Fauxton to query and inspect transaction data. Here's a step-by-step breakdown:

1. Switch your Composer app to use CouchDB (not LevelDB) #

By default, Hyperledger Composer might use LevelDB, which doesn’t work with Fauxton. You’ll need to update your connection profile to use CouchDB instead:

• Open your connection profile JSON file (usually located in ./connection-profiles/)
• Locate the peer configuration section, then modify the database settings to point to CouchDB:

  "peers": {
    "peer0.org1.example.com": {
      "url": "grpc://localhost:7051",
      "eventUrl": "grpc://localhost:7053",
      "database": {
        "type": "couchdb",
        "url": "http://admin:admin@localhost:5984",
        "database": "composer_peer0org1examplecom"
      }
    }
  }
  

• Double-check that the CouchDB URL matches the credentials and port you’ll expose later.

2. Expose the CouchDB container port #

Your Hyperledger Fabric/CouchDB Docker container probably doesn’t have port 5984 (CouchDB’s default port) mapped to your host machine yet. Update your docker-compose.yml file to add the port mapping:

• Find the CouchDB service entry (often named couchdb or bundled with a peer like peer0.org1.example.com)
• Add the port mapping under the ports section:

  services:
    couchdb:
      image: hyperledger/fabric-couchdb:latest
      ports:
        - "5984:5984"  # Map host port 5984 to container port 5984
      environment:
        - COUCHDB_USER=admin
        - COUCHDB_PASSWORD=admin
  

3. Restart your Docker containers #

Apply the changes by restarting your Fabric/Composer stack:

docker-compose down
docker-compose up -d

Give it a minute or two for all services to fully spin up.

4. Access Fauxton and interact with your Composer data #

• Open your browser and go to http://localhost:5984/_utils
• Log in using the credentials you set in docker-compose.yml (e.g., admin/admin)
• You’ll see a list of databases—look for one named something like composer_<your-business-network-namespace>_<your-business-network-name> (this is where Composer stores its world state and transaction history)
• Click into the database to browse documents, run ad-hoc queries using CouchDB’s Mango syntax, or inspect transaction records directly.

Key Notes to Keep in Mind #

• Security Warning: Never expose CouchDB directly to the internet in a production environment. Use strong authentication, restrict access with firewalls, and consider a TLS-enabled reverse proxy if remote access is needed.
• Avoid Direct Edits: Composer manages the ledger’s consistency—don’t modify documents directly in Fauxton unless you’re 100% sure what you’re doing, as this could break the ledger’s integrity.
• Database Naming: If you’re unsure which database corresponds to your business network, check Composer’s logs for references to the CouchDB database URL.

内容的提问来源于stack exchange，提问作者ghindle