#!/bin/bash
# Borrows heavily from Seán C. McCord's https://github.com/Ulexus/docker-ceph repository

ETCD_PORT=${ETCD_PORT:-4001}
ETCD="$HOST:$ETCD_PORT"

MDS_NAME=`hostname`

until confd -onetime -node $ETCD -config-file /app/confd.toml >/dev/null 2>&1 ; do
  echo "store-metadata: waiting for confd to write initial templates..."
  sleep 5
done

# Check to see if we are a new MDS
if [ ! -e /var/lib/ceph/mds/ceph-$MDS_NAME/keyring ]; then
  mkdir -p /var/lib/ceph/mds/ceph-${MDS_NAME}

  # See if we need to generate a key for the MDS
  if [ -e /etc/ceph/ceph.mds.keyring ]; then
    cp /etc/ceph/ceph.mds.keyring /var/lib/ceph/mds/ceph-${MDS_NAME}/keyring
  else
    # Generate the new MDS key
    ceph auth get-or-create mds.$MDS_NAME mds 'allow' osd 'allow *' mon 'allow profile mds' > /var/lib/ceph/mds/ceph-${MDS_NAME}/keyring
  fi
fi

echo "store-metadata: running..."
exec /usr/bin/ceph-mds -d -i ${MDS_NAME}