Financial Services
How a FinTech Saved $200K During Black Friday
47 min
Time to Resolution
$200K+
Revenue Saved
124
Pods Recovered
Zero
Data Loss
Before vs After
Metric
Before
After
Pods Status
120+ CrashLoop
124 Running 100% healthy
Revenue Loss
$8K/min
$0/min Stopped
HPA maxReplicas
500 (wrong)
50 (correct) Fixed
Uptime Since
Outage
99.99% 5 months
Emergency Response Flow
1
PagerDuty Alert
Auto-triggered
2
SRE Diagnosis
8 min
3
Helm Rollback
Force revert
4
Pods Stable
47 min total
Emergency Rescue Timeline — From Alert to Recovery in 47 Minutes
The Challenge
At 11:47 PM on Black Friday, the client's EKS cluster began cascading failures. A Helm upgrade 15 minutes earlier introduced a misconfigured HPA that scaled pods beyond node capacity.
120+ pods in CrashLoopBackOff across 3 namespaces
Payment pipeline down — $8,000/min revenue loss
Internal team exhausted after 12-hour shift
Rollback failed due to corrupted Helm release history
Our Solution
CloudLink's emergency team was paged via 15-minute SLA. Senior SRE diagnosed root cause within 8 minutes by correlating Helm revision timeline with Datadog metrics.
Identified misconfigured HPA maxReplicas (500 instead of 50)
Force-rolled back Helm release to last known-good revision
Patched resource requests/limits for affected deployments
Deployed emergency node group for excess scheduling
Set up 24h post-incident monitoring dashboard
Project Timeline
11:47 PM
PagerDuty alert — pod evictions across production
11:49 PM
CloudLink emergency pager activated
11:52 PM
Senior SRE joins Slack, gains cluster access
12:00 AM
Root cause — HPA misconfiguration in revision #47
12:15 AM
Helm force-rollback initiated
12:24 AM
Emergency node group provisioned
12:34 AM
All pods stabilized — payments processing
VE
"Our team was burned out. CloudLink showed up in 3 minutes, owned the incident, and had us back online before we lost $200k."
VP Engineering
Series C FinTech
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