DevOps

Problem: The kube-api pod was frequently restarting with the error message: apiserver received an error that is not a metav1.Status: rpctypes.EtcdError{code:0xe, desc:”etcdserver: request timed out”}. This issue began following an etcd data migration from a single-node Kubernetes cluster to a multi-node cluster using an unconventional method. Despite multiple attempts to resolve the issue, the problem […]

Problem: The client was operating Jenkins 2.344 on Apache Tomcat 8.5.41 and required redirection from port 8084 (HTTP) to port 8443 (HTTPS). Although the “server.xml” and “web.xml” files were configured in the $CATALINA_HOME/conf/ directory, leading to successful redirection from http://jenkins:8084 to https://jenkins:8443, accessing http://jenkins:8084/jenkins (the application) did not redirect to port 8443. The cancellation of […]

Problem: The client encountered a recurring issue within the Docker Swarm environment, wherein containers sporadically crashed with exit code 137. This behavior, indicative of potential memory-related issues, was exacerbated by the absence of corresponding container logs, complicating the diagnostic process. Process: Initial Inquiry and Investigation: Prompted by the client’s request for a Root Cause Analysis […]

Problem: The client reported sudden high CPU utilization on their RHEL 7.5 Nexus server. Despite disabling tasks and restarting the server, the issue persisted. Logs indicated that the Nexus process was the top contributor to CPU utilization. Process: Steps and measures undertaken to investigate the issue: Requesting Information: Furnished JVM logs, Nexus application logs, and […]

Problem: The challenge arises when attempting to upgrade from Spring Boot (SB) version 2.7.x to SB 3.1.x due to compatibility issues with OpenJPA. No compatible version of OpenJPA has been found for Spring Boot 3.1.x. Upgrading to Spring Boot 3.1.x presents hurdles in terms of OpenJPA compatibility. The current version of OpenJPA lacks support for […]

Problem: The client encountered an error during the installation of a Helm chart, specifically related to the NGINX admission controller. The installation failed due to a validation error in NGINX Ingress, indicating a synchronization issue with the ingress event handlers. This problem arose when multiple ingresses used the same secret, causing complications with secret refreshing […]

Title: Stabilizing Applications Amidst DNS Challenges: Tackling Intermittent Connection Issues in Kubernetes Problem: The customer is facing intermittent connection issues in their application, resulting in “connection refused” errors in the logs. These errors are linked to DNS resolution failures and connection timeouts. As a temporary fix, the customer is restarting the CoreDNS pod every hour, […]