version: "3.0"
services:
    ceph_mds:
        container_name: ceph_mds
        image: quay.io/ceph/daemon:latest-octopus
        #copy hostname of the host to avoid confusion in e.g. `ceph status`
        hostname: ${HOSTNAME}
        environment:
            #in case cephfs doesn't exist, yet (normally only during bootstrap)
            - CEPHFS_CREATE=1
        volumes:
            - /ceph/mds/var/lib/ceph/:/var/lib/ceph/
            - /ceph/mds/etc/ceph/:/etc/ceph/
        command: mds
        networks:
            - ceph
networks:
    ceph:
        external: true