Browse incidents, troubleshooting guides, AI diagnostics, verified fixes and community discussions related to Docker.
## Environment Docker Swarm cluster (4 manager/worker mixed roles) running Docker Engine 20.10.8 on Ubuntu 18.04 hosts. Multiple overlay networks created for different stacks; some were created manually with --subnet and custom options. Under high i...
## Environment On-prem Kubernetes 1.23 control plane, 5 worker nodes (Ubuntu 20.04, Docker 20.10.12, kubelet configured with cgroupDriver=systemd). Workers: 128GB RAM, 32 vCPU. Applications deployed as Deployments with requests/limits set (example: ...
## Environment CI: GitHub Actions self-hosted Ubuntu 20.04 runners with Docker Engine 20.10 using overlay2 on ext4; runners are VMs on on-prem KVM cluster; CI builds multi-stage Dockerfiles that copy artifacts from builder stage to final stage; rece...
## Environment On-prem K8s 1.25 cluster running kubelet systemd service on Ubuntu 22.04 nodes. CSI driver for vendor SAN is deployed as a DaemonSet (node plugin) and StatefulSet (controller). Problem observed after rolling nodes to a new image with ...
## Environment Docker Swarm cluster (Docker Engine 20.10) across three bare-metal hosts with Intel NICs, overlay driver using vxlan, recent change: global MTU lowered from 1500 to 1400 to accommodate a cloud provider tunnel. Hosts run Ubuntu 22.04, ...
## Environment Ubuntu 22.04 desktop (kernel 5.15), Docker Engine 20.10.17, containers use default bridge network and rely on host's /etc/resolv.conf provided by systemd-resolved (127.0.0.53). Laptop uses NetworkManager with two interfaces: Wi‑Fi and...
## Environment macOS 13.6 MacBook Pro (Apple Silicon) using Time Machine to a Synology SMB share (SMB protocol, SMB3 negotiated). User enabled 'Back Up Automatically' and also added the SMB mount point to Spotlight indexing in System Settings. Local...
## Environment On-prem K8s cluster v1.25 with kubelet on Ubuntu 22.04 nodes, pods mount ConfigMap via projected volume (volumeMount to /app/config). Pod runs a Java application under OpenJDK 17 that reads configuration files on startup. ConfigMap up...
## Environment Ubuntu 22.04 LTS host running Docker Engine 24.0.2, containers running nginx:stable with a host bind mount /etc/nginx/conf.d/site.conf -> /etc/nginx/conf.d/site.conf inside container. Host edits done via VS Code's default save (atomic...
## 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. ## ...