Browse incidents, troubleshooting guides, AI diagnostics, verified fixes and community discussions related to DevOps.
## Environment AWS account, eu-west-1. Auto Scaling Group (ASG) using a Launch Template created from a Packer-built AMI. ASG configured for rolling updates with lifecycle hook 'autoscaling:EC2_INSTANCE_LAUNCHING' (timeout 3600s). Instances boot in p...
## Environment Terraform 1.2.9 with hashicorp/aws provider 3.63.0 managed via CI (GitHub Actions). Resources include aws_security_group and aws_instance with 'tags' block. Team runs 'terraform apply' in CI after every merge; PRs show terraform plan ...
## Environment Elasticsearch 7.10 cluster on AWS EC2: three data nodes (m5.large equivalents), each node has a single EBS volume mounted at /var/lib/elasticsearch with ext4 filesystem. cluster.routing.allocation.disk.threshold_enabled=true. Nodes ru...
## Environment Enterprise Windows domain (AD) with Windows Server 2016 DCs. DCs underwent TLS certificate rotation for LDAPS and LDAPS termination on load balancer changed certificates. Management automation uses PowerShell Remoting (WinRM) with Neg...
## Environment On-prem K8s cluster (v1.26) with containerd 1.7, nodes provisioned from a node pool with 200 GB root disk; workloads include several large images (~2–6 GB each) and a nightly batch job that pulls and extracts images concurrently. ## ...
## Environment Home network with dual‑band AP (2.4 GHz and 5 GHz SSIDs on same SSID name), OpenWrt router acting as DHCP server (192.168.1.1), clients include Android phones (Android 13) and a Raspberry Pi 4 running avahi/Bonjour for local hostname ...
## Environment Consumer home router (vendor firmware v2.13.0 installed via web UI two days ago), WAN obtains public IP via DHCP from ISP and shows 'Connected', LAN clients receive correct private addresses from router DHCP (192.168.1.0/24), router a...
## Environment Production AWS environment: ECS on EC2-backed Auto Scaling Group with CodeDeploy blue/green deployment. Lifecycle hook configured to run a bootstrap script that registers instance with internal monitoring and pulls secrets from SSM Pa...
## Environment Ubuntu Server 22.04 LTS running a custom service 'app-refresh.service' which manages an application and performs TLS certificate rotation in ExecStop via a bash script that calls certbot and a remote Vault API. Observed on VM and one ...