Case Studies

Problem: A Prometheus deployment failed a security compliance scan when Prisma Cloud flagged a high-severity vulnerability in the sidecar container image kiwigrid/k8s-sidecar:1.30.9. The issue was linked to the pip package, which was identified as vulnerable to arbitrary code execution. This raised concerns about both compliance and the security of the monitoring stack. Process: Step 1: […]

Problem: A client deploying Harbor, the open-source container registry, wanted to replace the default Hossted-assigned domain with their own custom domain. Despite following setup instructions, Harbor continued to resolve to the old hostname. This resulted in SSL certificate mismatch errors, failed authentication requests, and missing features in the UI such as Proxy Cache and Helm […]

Problem: The client reported that their Apache Airflow Scheduler pod was not automatically detecting updates from a Persistent Volume Claim (PVC) named airflow-dags. Meanwhile, a related airflow-triggerer pod using the same PVC was updating files as expected. To temporarily resolve the issue, the client had to manually restart (“bounce”) the scheduler pod to force it to recognize new […]

Problem: The client, preparing to launch Argo Workflows v3.6.0 for production, faced a critical RBAC issue when enabling Single Sign-On (SSO) with Azure Active Directory (Entra ID) via Dex. When users attempted to log in through SSO, Argo Workflows returned the error: unknown name groups This prevented role-based authorization through group membership, effectively blocking all […]

Problem: A client managing a multi-datacenter Apache Cassandra setup observed an inconsistency in rack configuration between two datacenters. In the primary datacenter (`dc1`), all three nodes were configured with the same rack identifier (`rack1`), whereas in the secondary datacenter (`drdc`), each node was correctly configured with unique rack values (`rack1`, `rack2`, `rack3`). This raised concerns […]

Problem: The client encountered a critical issue in their Apache Cassandra setup: the Disaster Recovery (DR) cluster was consuming significantly more filesystem (FS) space than the primary cluster, despite having the same data replication strategy. As a result, one of the DR nodes hit 100% disk usage, causing the replica to go down. The client […]

Problem: The client wanted to integrate Apache Cassandra metrics into Prometheus for monitoring and alerting. While using JMX Exporter with Node Exporter, they noticed that too many unwanted metrics were being fetched. This resulted in performance issues such as delayed response times from the curl command and unnecessary load on Prometheus. Additionally, key metrics like […]

Problem: A client from the telecommunications sector encountered critical issues while attempting to deploy a new Apache Cassandra cluster on AWS. After unpacking the Cassandra tarball and attempting to start the service manually, the Cassandra process failed to initialize due to a Java memory allocation error. The error indicated that the Java Virtual Machine (JVM) […]

Problem: The client reported that they had deployed a billing system for one of their customers, which uses PostgreSQL 15 within a high availability cluster managed by Patroni. As the system entered production, the customer requested that sensitive data within the database tables (such as names, addresses, phone numbers, and card information) be encrypted or […]