MONITORING AND UPGRADES — KEEPING YOUR DAPP ALIVE

PRODUCTION MONITORING:

1. Canister metrics

- Instruction consumption

- Memory usage

- Cycle balance

- Message throughput

2. Alerting

- Low cycle balance

- High error rates

- Performance degradation

- Security events

3. Logging

- Structured logging

- Event tracking

- Error capture

- Audit trails

TOOLS:

1. dfx canister status

2. IC Dashboard

3. Canister snapshots

4. Custom monitoring canisters

UPGRADE STRATEGIES:

1. Blue-green deployment

- Deploy new version alongside old

- Test new version

- Switch traffic

- Keep old version as backup

2. Rolling upgrade

- Upgrade canisters one by one

- Minimal downtime

- Gradual rollout

3. Hot upgrade

- Upgrade without stopping

- Use stable memory

- Preserve all state

UPGRADE CHECKLIST:

1. Backup state

2. Test upgrade on testnet

3. Verify state preservation

4. Check controller access

5. Monitor after upgrade

ROLLBACK PLAN:

1. Keep previous version ready

2. Test rollback procedure

3. Document rollback steps

4. Set up automated rollback

This is how you maintain production-grade applications on ICP.

Next: Part 33 — Ecosystem & Future Roadmap

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