CASE 30 · CRESTA · 2025
One observability plane across thirty accounts.
A logistics company had thirty production accounts and an on-call rotation that toggled between four separate Grafana instances depending on the alert. We unified observability with CloudWatch cross-account sharing and a single Grafana fronted by IAM Identity Center.
B2B logistics
LANDING ZONE
2025
RESULTS
What changed, by the numbers.
ON-CALL TOOL SWITCHES
−100%
MTTR
−42%
GRAFANA INSTANCES
4 → 1
LOG INGESTION COST
−27%
HOW IT WENT
The on-call engineer’s first task during an alert was to figure out which Grafana to open. The second task was to find the right metric — every account had drifted on dashboard layout. The third task was to actually start investigating. Two of the four steps were tooling friction.
CloudWatch cross-account observability turned every production account into a "source" linked to a "monitoring" account. AMP took the Prometheus metrics; Managed Grafana sat on top of both. We rebuilt the on-call dashboard from scratch, with one row per service across all accounts.
On-call drills now start with the right dashboard already on screen. MTTR dropped 42% on the engineering metric, mostly recovered from the "figuring out the tool" step. The four legacy Grafanas were retired in week eight.
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