mon

ceph-mon

This Dockerfile may be used to bootstrap a Ceph cluster or add a mon to an existing cluster.

Usage

Environment variables:

• MON_NAME is the name of the monitor (defaults to hostname -s)
• MON_IP is the IP address of the monitor (public) (required, if not using autodetection)
• MON_IP_AUTO_DETECT: Whether and how to attempt IP autodetection.
  • 0 = Do not detect (default)
  • 1 = Detect IPv6, fallback to IPv4 (if no globally-routable IPv6 address detected)
  • 4 = Detect IPv4 only
  • 6 = Detect IPv6 only

For example: docker run -e MON_IP=192.168.101.50 -e MON_NAME=mymon ceph/mon

If you have an existing Ceph cluster and are only looking to add a monitor, you will need at least four files in /etc/ceph:

• ceph.conf - The main ceph configuration file, which may be obtained from an existing ceph monitor
• ceph.client.admin.keyring - The administrator key of the cluster, which may be obtained from an existing ceph monitor by ceph auth get client.admin -o /tmp/ceph.client.admin.keyring
• ceph.mon.keyring - The monitor key, which may be obtained from an existinv ceph monitor by ceph auth get mon. -o /tmp/ceph.mon.keyring
• monmap - The present monitor map of the cluster, which may be obtained from an existing ceph monitor by ceph mon getmap -o /tmp/monmap

Otherwise, if you are bootstrapping a new cluster, these will be generated for you.

Commonly, you will want to bind-mount your host's /etc/ceph into the container. For example: docker run -e MON_IP=192.168.101.50 -e MON_NAME=mymon -v /etc/ceph:/etc/ceph ceph/mon