Company Disaster Recovery Plan Template

Standard Operating Procedure: Enterprise Disaster Recovery Plan (DRP) Execution

Document ID: SOP-TR-DRP-004
Effective Date: October 24, 2023
Version: 3.2.0
Review Cadence: Semi-Annual (Every 6 Months)
Author: Julian Vance, Chief Architect, Template Registry

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1. Executive Summary & Purpose

This Standard Operating Procedure (SOP) defines the mandatory protocols for declaring, executing, and recovering from catastrophic system failures affecting Template Registry infrastructure. The objective is to establish deterministic recovery paths to achieve pre-defined Recovery Time Objectives (RTO < 4 hours) and Recovery Point Objectives (RPO < 1 hour) across all Tier-1 mission-critical services. Compliance with this SOP is mandatory for all Engineering, Operations, and Incident Response personnel.

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2. Scope & Prerequisites

2.1 Scope

• Applies to all cloud-native workloads, on-premise hybrid nodes, identity providers, and data persistence layers managed by Template Registry.
• Excludes sandbox and non-production ephemeral environments unless compromised systems threaten production perimeters.

2.2 Prerequisites & Tooling Access

• Identity & Access Management: PagerDuty Admin, AWS/GCP Root or Organization Admin access, Terraform Cloud Enterprise workspace tokens.
• CLI Utilities: kubectl (v1.28+), terraform (v1.5+), aws-cli (v2+), jq, vault.
• Communication Infrastructure: PagerDuty Bridge, #incidents-critical Slack channel, Bridgefy (out-of-band fallback).
• Physical/Hardware Prerequisites: FIDO2 Hardware Security Keys (YubiKey) for break-glass root credential retrieval.

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3. Roles & Responsibilities (RACI Matrix)

RACI Definitions: Responsible (does the work), Accountable (owns the outcome), Consulted (provides input), Informed (kept updated).

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4. Step-by-Step Procedure

Phase 1: Incident Assessment & Declaration

• 1.1 SRE On-Call detects anomalous telemetry, metric threshold breaches, or unresponsiveness across primary health endpoints.
• 1.2 Verify false-positive mitigation: Confirm alert via secondary monitoring region (Datadog/CloudWatch cross-region probes).
• 1.3 Initiate PagerDuty Sev-1 incident broadcast using the command: pd incident create --urgency=high --title="Catastrophic Infrastructure Failure - DRP Activation".
• 1.4 Incident Commander (IC) spins up the emergency bridge and locks the #incidents-critical Slack channel to incident responders only.

Phase 2: Isolation & Failover Execution

• 2.1 Isolate compromised or unstable regions/clusters to prevent cascading failure propagation:

  aws ec2 modify-vpc-attribute --vpc-id vpc-xxxxxx --no-enable-dns-hostnames
  

• 2.2 Update DNS routing policies via Route53 / Cloudflare to redirect traffic away from the primary region to the warm-standby DR region:

  terraform apply -target=module.global_dns -auto-approve
  

• 2.3 Verify global traffic redirection using dig +trace registry.internal.template-registry.com and ensure TTL expiration compliance.

Phase 3: State Reconstruction & Database Restoration

• 3.1 Access Vault using break-glass credentials to retrieve master storage encryption keys:

  vault login -method=oidc
  

• 3.2 Spin up core infrastructure in the DR region via Infrastructure as Code (IaC):

  terraform workspace select dr-failover
  terraform apply -var-file="prod-dr.tfvars"
  

• 3.3 Restore primary relational databases from the latest immutable, point-in-time snapshot (S3/GCS secure bucket):

  aws rds restore-db-instance-from-db-snapshot \
      --db-instance-identifier template-registry-prod-dr \
      --db-snapshot-identifier snap-latest-verified
  

• 3.4 Validate transaction log application integrity up to the moment of failure to guarantee RPO < 1 hour criteria.

Phase 4: Service Verification & Smoke Testing

• 4.1 Execute automated end-to-end smoke test suite against the recovery environment:

  pytest tests/dr/smoke_validation.py --env=dr-failover
  

• 4.2 Confirm read/write consistency, authentication pipelines (OAuth/SAML), and third-party webhook integrations.
• 4.3 Review application error rates via centralized logging (sumologic/elastic). Error budget burn must stabilize below 0.5% over a 15-minute window.

Phase 5: De-escalation & Post-Incident Review (PIR)

• 5.1 Formally announce system stabilization to Executive Leadership and external stakeholders.
• 5.2 Schedule mandatory Post-Incident Review (PIR) within 48 hours of recovery completion.
• 5.3 Archive all incident telemetry, chat logs, and metrics snapshots to the compliance audit bucket.

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5. Quality Assurance & Pro-Tips

5.1 Best Practices

• Immutable Backups: Ensure all DR snapshots have object-lock enabled in compliance mode to prevent deletion via compromised administrative accounts.
• Infrastructure Parity: Maintain identical sizing and capacity configurations in the DR region; do not rely on auto-scaling scaling-up speed during a live outage.

5.2 Common Pitfalls

• Split-Brain Scenarios: Never bring the primary region back online without ensuring database replication pipelines are completely severed or cleanly demoted to read-replicas.
• Credential Drift: Regularly verify that Vault secrets and IAM roles in the DR region match production configurations. Do not wait for an incident to test IAM policies.

5.3 Metric Thresholds

• Recovery Time Objective (RTO): $\le 4$ hours from initial paging.
• Recovery Point Objective (RPO): $\le 1$ hour of lost transactional data.
• Smoke Test Pass Rate: $100%$ of critical path assertions.

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6. Frequently Asked Questions (FAQ)

Q1: What should I do if the automated Terraform failover script fails due to state lock issues?
A: Force-unlock the Terraform state only after manually verifying via the cloud console that no infrastructure changes are actively applying. Execute: terraform force-unlock <LOCK_ID> using the unique lock identifier provided in the error output, then re-run the apply command with targeted modules.

Q2: How do we handle downstream third-party APIs that reject traffic coming from our DR region's IP range?
A: Contact the third-party vendor via their emergency support channel to dynamically whitelist the pre-allocated Elastic IP (EIP) blocks associated with the Template Registry DR region, which are documented in sops/network-allocations.yaml.

Q3: Who holds the authority to abort a DR failover procedure if unexpected data corruption occurs?
A: Only the Lead Systems Architect in direct consultation with the Incident Commander possesses the authority to halt or roll back a failover execution sequence.