IBM Cloud Professional SRE case studies
IBM Cloud Professional SRE · Put your knowledge to work in context.
The IBM Cloud Professional SRE credential is listed in this site's exam catalogue under the aliases "IBM Certified Professional SRE - Cloud", with six knowledge domains: SRE foundations; monitoring, observability and incident response; automation and infrastructure as code; IBM Cloud platform operations and architecture; reliability engineering, capacity and performance; and security, compliance and governance. Two important caveats apply before you build a study plan. The IBM Cloud Professional SRE case studies are 5 cases and about 3,264 words.
1Intermittent 502s at 02:00 UTC on a Dallas IKS Cluster
A checkout service runs on IBM Cloud Kubernetes Service in us-south across three zones: 12 worker nodes (8 vCPU/32 GB), 60 pods of a Node.js API behind a VPC Application Load Balancer. The SLO is 99.95% successful requests over 30 days.
697 words, about 3 min2Terraform Drift After a 02:00 Security-Group Hotfix
A platform team manages production VPC and IBM Cloud Kubernetes Service with IBM Cloud Schematics workspaces; each environment has its own workspace and state. During a 02:00 incident, an engineer edited an existing Terraform-managed security-group rule from the partner's /32 to 0.0.0.0/0 so an external partner could reach a debug endpoint.
709 words, about 4 min3HPA Scale-Out Meets a 100-Connection PostgreSQL Ceiling
A Java service on Red Hat OpenShift on IBM Cloud runs on six 16 vCPU/64 GB workers. The HPA is set to 8–40 pods on 70% CPU, and each pod uses HikariCP with a maximum pool of 10.
634 words, about 3 min4Audit Finding on a 4 TB COS Bucket with BYOK
An audit of a 4 TB IBM Cloud Object Storage bucket in us-south finds three issues: the bucket has public access enabled so a marketing site can read objects directly; a service ID with Writer access has its API key stored in a CI repository; and Activity Tracker events are not routed to the SIEM. The bucket uses Key Protect with a customer root key, versioning is on, and there is no lifecycle policy.
637 words, about 3 min5Active-Passive Failover with a 12-Minute Replication Lag
An active-passive service runs on Red Hat OpenShift on IBM Cloud in Dallas, with a warm standby in Frankfurt. Cloud Internet Services global load balancer health checks move traffic when the Dallas endpoint fails.
587 words, about 3 min