Docker: Bind for 0.0.0.0:8080 failed: port is already allocated
docker: Error response from daemon: driver failed programming external connectivity on endpoint web (abcdef): Bind for 0.0.0.0:8080 failed: port is already allocated.
Immediate Remediation
bash
# 1. Locate container occupying the host port:
docker ps --filter "publish=8080" --format "{{.ID}} {{.Names}}"
# 2. Stop conflicting container:
docker stop $(docker ps -q --filter "publish=8080")
# 3. Or remap to alternative host port in docker-compose.yml:
# ports:
# - "8081:8080"Root Cause Analysis
Another container or local system daemon is already bound to 0.0.0.0:8080 on the host network interface.
Verification & Guardrails
- Check if local web servers (nginx, apache) are running on host with lsof -i :8080.
- On Windows/macOS, restart Docker Desktop if virtual socket binding becomes orphaned.
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