DevOps

Overview Docker Compose derives a project name to namespace containers, networks, and volumes. Collisions happen when: Two services define the same container_name. Two Compose projects share the same project name (default: current......

Overview Docker Compose throws “exported ports must be unique” when two or more port publishes in the same Compose project collide. The conflict is usually the same published (host) port used multiple times with the same protocol and host......

Problem overview You see an error like: network_mode: host is incompatible with port bindings ports are not supported with network_mode: host Root cause: host networking shares the host’s network namespace, so Docker cannot perform port......

What this error means The error profiles "…" not found appears when you enable a profile (via --profile or COMPOSE_PROFILES) that does not exist on any service in the final Compose configuration. It can also show up when profiles......

What this error means The message yaml: did not find expected key is a YAML parsing error. Docker Compose could not interpret your docker-compose.yml because of malformed YAML. This is usually due to indentation, missing colons, stray......

What this error means Git prints "The remote end hung up unexpectedly" when the server closes the connection mid-operation (push, fetch, or clone). Common root causes: Network or proxy issues (HTTP/2 quirks, SSL interception,......

Overview If you see the error "depends_on condition is not supported in Compose v3", your compose file uses the v3 format where conditional depends_on was removed. You have three practical paths: Use modern Docker Compose......

What this error means You used depends_on with condition: service_healthy, but the dependency service has no healthcheck. Docker Compose can only wait for a service to become "healthy" if that service defines a healthcheck.......

What this error means Docker Compose reports: ERROR: for <service> Cannot start service <service>: <reason> Compose tried to create and start the container, but Docker Engine or the runtime failed. The key is the trailing......

What this error means The message "No container found for <service>_1" appears when docker compose exec cannot locate a running container for the service you named. Common causes: The service is not running (stopped or......

What the error means Docker Compose shows "Found orphan containers" when containers from the same project name exist that are not defined in your current compose files. This usually happens after you: Remove or rename a......

What this error means Compose is telling you that a bind mount’s host side is not an absolute path. Docker can’t mount a relative path from your machine into a container unless Compose resolves it to an absolute path first. Typical......