What is the compute engine feature that allows vms to be added to or subtracted from an application based on load metrics?

Tools that integrate well with green cloud computing are CarbonTracker, CodeCarbon, Climatiq and many more.

To quickly roll back to the last known good state, it is important to version control all infrastructure as code (IaC) for rollbacks with something like Terraform, Deployment Manager, or similar tooling. Have rollback playbooks per GCP service area, or for any configuration you can roll back - such as stored query versions for BigQuery, instance snapshots for Compute Engine, or older container images for GKE - in case your rollout or transform has an unforeseen condensation with a particular GCP service (BigQuery, Cloud Run or GKE). Utilize load balancer routing rules, or traffic-splitting settings in case you need to roll traffic back to known good state gradually (i.e. 80/20 rollback through Cloud Load Balancing, or Cloud Run settings).

For comms, start internally: alert your SRE, DevOps, and product teams with a quick, factual update like We’re observing higher latency and error rates post-rollout. Rollback to previous GCP configuration is in progress. No data loss expected. Keep an eye on Cloud Monitoring and Error Reporting dashboards during rollback, and communicate updates at key milestones (rollback start, verification complete, stability confirmed).

Update your status page and important support channels externally if there is a discernible impact on customers. Stress that service dependability is your first concern and that rollbacks are preventative rather than disastrous.

To prove that an Azure Front Door update improved team productivity without introducing new risk, you’ll want to track KPIs that capture both operational efficiency and service reliability. On the productivity side, start with deployment and change cycle times if your networking or DevOps teams can roll out routing or WAF policy updates faster post-update, that’s a big win. Track time to provision new endpoints, number of manual interventions required per deployment, and average time to propagate configuration changes all should trend down if the update streamlined workflows.

For the risk side, focus on end-user performance metrics like latency, cache hit ratio, and availability (SLA compliance). A successful update shouldn’t cause higher response times, more 5xx errors, or degraded CDN caching. Also monitor security event frequency (e.g., WAF false positives or missed blocks), rollback rates, and incident counts tied to routing or SSL issues.

If, after the update, teams spend less time managing configurations, deployments are smoother, and your uptime and security metrics stay flat or improve that’s your proof. Essentially, faster ops with the same or better reliability means the Azure Front Door update boosted productivity without increasing risk.

Potential change-freeze windows

• Thursday, October 2nd: Mahatma Gandhi Jayanti and coincides with Dussehra.
• Saturday, October 11th - Sunday, October 12th: October 11th is a regional holiday in many states, Saturday and October 12th is a Bank Holiday across all of India for Dussehra.
• Monday, October 20th: Diwali/Deepavali

Rolling out Azure Front Door is great for global traffic management, but it’s also one of those infra switches where a tiny config mistake (routing, caching, TLS, WAF rules) can tank performance. You’ll definitely want a rollback + comms plan in your back pocket.

Rollback Strategy

• Blue/Green or Parallel Setup: Keep your old CDN/load balancer (Cloudflare, Akamai, Nginx, ALB, etc.) live in parallel. Roll traffic gradually (say 10%, 25%, 50%) through AFD so rollback = just shift DNS/traffic weights back.
• DNS TTLs: Lower DNS TTLs before rollout (60s–300s) so rollback isn’t stuck waiting for caches to expire.
• Rollback Triggers: Define red lines ahead of time, e.g.
• Latency >2x baseline for 10+ mins
• Error rate >3% sustained
• Regional imbalance (e.g. EU traffic stuck in US PoPs)
• If any of these hit → cut back traffic immediately.
• Config Snapshots: Export AFD routing/WAF configs so you can revert specific rule changes without nuking the whole rollout.

Comms Plan

Internal:

• War room Slack/Teams channel with SRE + NetOps + Support.
• Shared live dashboards (AFD metrics in Azure Monitor + your own APM like Datadog/NewRelic).
• One person designated as rollback decision owner so you’re not debating in the middle of downtime.

Customers:

• If rollback is fast, most won’t notice.
• If impact is visible (timeouts, slower load times), push a status page update: We experienced performance issues due to a new routing layer. Rollback complete, systems stable.
• Support macros ready: Some requests were slower due to new network configuration. The issue is resolved, please retry.
• Stakeholders/Execs: One-liner updates like: Front Door rollout paused due to perf regressions. Legacy routing restored. No data loss.

Post-Rollback Cleanup

• Reconcile logs to make sure no traffic got blackholed.
• Collect perf data from AFD vs old infra to isolate the regression (was it a caching miss, WAF overhead, or rule misconfig?).
• Try again with a smaller canary rollout once the fix is verified.