Project Planning & Deployment Flashcards

When upgrading a chaincode in Fabric 2.x using the new lifecycle, what must change in the definition?

Answer: The sequence number must be incremented

Each new committed definition requires the sequence number to be incremented by one.

Which items are essential to back up for a Fabric peer to allow recovery?

Answer: Ledger data, MSP identities and private keys, and configuration

Recovery needs the ledger, the cryptographic identities and keys, and node configuration.

A peer's enrollment certificate is about to expire. What is the correct remediation?

Answer: Re-enroll the identity with the Fabric CA to obtain a new certificate

Expiring certificates are renewed by re-enrolling (or reenrolling) with the CA before expiry.

A new organization is being added to an existing channel. Which process is used?

Answer: Submit a channel configuration update signed according to the channel's modification policy

Membership changes are config updates that must satisfy the relevant modification policy, typically a majority of admins.

Which endpoints does the Fabric operations service expose for monitoring a peer?

Answer: /metrics for Prometheus and /healthz for health checks

The operations service offers Prometheus-format metrics and health check endpoints, plus log level management.

What is the main benefit of chaincode as an external service (introduced in Fabric 2.0 and refined later) for Kubernetes deployments?

Answer: Chaincode runs in its own managed container rather than being built by the peer through a Docker daemon

External chaincode avoids the peer needing Docker socket access and lets standard orchestration manage chaincode pods.

What does the Fabric Gateway service (Fabric 2.4+) simplify for client applications?

Answer: It handles endorsement collection, submission and commit status on the peer so clients connect to a single peer

The Gateway on the peer coordinates endorsement and ordering submission, simplifying SDK logic.