[ceph] find osd_id when using ceph-volume

ceph/ceph-osd-create-start

@@ -12,6 +12,8 @@ fi
 export DEV=$1;shift
 export CLASS=$1; shift
 
+set -e
+
 # Ensure ceph-volume has all pre-requisites
 if [ ! -f /var/lib/ceph/bootstrap-osd/ceph.keyring ]; then
      mkdir -p /var/lib/ceph/bootstrap-osd
@@ -21,7 +23,13 @@ if [ ! -f /etc/ceph/ceph.client.bootstrap-osd.keyring ]; then
     ceph auth get client.bootstrap-osd > /etc/ceph/ceph.client.bootstrap-osd.keyring
 fi
 
-ceph-volume lvm prepare --data $DEV --crush-device-class $CLASS
+# We are redirecting to a tempfile so that the output is visible for debugging,
+# but we can still easily filter for the osd id
+tmp=$(mktemp)
+
+ceph-volume lvm prepare --data $DEV --crush-device-class $CLASS 2>&1 | tee ${tmp}
+osd_id=$(grep /var/lib/ceph/osd/ceph- ${tmp} | sed -e 's/.*ceph-//' -e 's,/.*,,' | head -n1)
+rm -f ${tmp}
 
 if [ $# -eq 1 ]; then
     echo "Not executing: /opt/ungleich-tools/monit-ceph-create-start osd.${osd_id}"