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Docker Compose Cheat Sheet

Setup Troubleshooting

Couldn’t connect to Docker daemon at http+docker://localhost - is it running?

Ensure systemd unit is configured correctly and has TCP socket configured. If not edit with sudo systemctl edit docker.service and provide

[Service]
ExecStart=/usr/bin/dockerd -H fd:// -H tcp://127.0.0.1:2375

Also set env var DOCKER_HOST

export DOCKER_HOST=127.0.0.1:2375