radosgw systemd support

Added a radosgw systemd support and associated prestart script.
  - With improved checking over first revison.
  - ceph-radosgw-prestart.sh now installed in /usr/lib/ceph-radosgw

Signed-off-by: Owen Synge <osynge@suse.com>

src/ceph-radosgw-prestart.sh

@@ -0,0 +1,100 @@
+#!/bin/bash
+
+eval set -- "$(getopt -o n: --long name:,cluster: -- $@)"
+
+while true ; do
+  case "$1" in
+    -n|--name) name=$2; shift 2 ;;
+    --cluster) cluster=$2; shift 2 ;;
+    --) shift ; break ;;
+  esac
+done
+
+CEPHCONF=`which ceph-conf`
+RADOSGW=`which radosgw`
+
+if [ -z "${CEPHCONF}"  ]; then
+  CEPHCONF=/usr/bin/${CEPHCONF}
+fi
+
+if [ ! -x "${CEPHCONF}" ]; then
+  echo "${CEPHCONF} could not start, it is not executable."
+  exit 1
+fi
+
+if [ -z "$RADOSGW"  ]; then
+  RADOSGW=/usr/bin/radosgw
+fi
+
+if [ ! -x "$RADOSGW" ]; then
+  echo "$RADOSGW could not start, it is not executable."
+  exit 1
+fi
+
+# prefix for radosgw instances in ceph.conf
+PREFIX='client.radosgw.'
+
+if [ -z "$name"  ]; then
+  echo "no name paramter"
+  exit 1
+fi
+
+if [ -z "$cluster"  ]; then
+  cluster="ceph"
+fi
+
+ceph_conf_file="/etc/ceph/${cluster}.conf"
+
+if [ ! -f "${ceph_conf_file}" ] ; then
+  echo "ceph config file not found: $ceph_conf_file"
+  exit 1
+fi
+
+longname=${PREFIX}${name}
+testname=$(${CEPHCONF} -c ${ceph_conf_file} --list-sections $PREFIX | grep $longname )
+
+if [ -z "$testname"  ]; then
+  echo "error parsing '$name' : valid types are: $(echo $(${CEPHCONF} -c ${ceph_conf_file} --list-sections $PREFIX | sed s/$PREFIX//))"
+  exit 1
+fi
+
+auto_start=`${CEPHCONF} -c ${ceph_conf_file} -n $longname 'auto start'`
+if [ "$auto_start" = "no" ] || [ "$auto_start" = "false" ] || [ "$auto_start" = "0" ]; then
+  echo "ceph.conf:[$longname], says not to start."
+  exit 1
+fi
+
+# is the socket defined?  if it's not, this instance shouldn't run as a daemon.
+rgw_socket=`$RADOSGW -c ${ceph_conf_file} -n $longname --show-config-value rgw_socket_path`
+if [ -z "$rgw_socket" ]; then
+  echo "socket $rgw_socket could not be found in ceph.conf:[$longname], not starting."
+  exit 1
+fi
+
+# mapped to this host?
+host=`${CEPHCONF} -c ${ceph_conf_file} -n $longname host`
+hostname=`hostname -s`
+if [ "$host" != "$hostname" ]; then
+  echo "hostname $hostname could not be found in ceph.conf:[$longname], not starting."
+  exit 1
+fi
+
+user=`${CEPHCONF} -c ${ceph_conf_file} -n $longname user`
+if [ -n "$user" ]; then
+  if [ "$USER" != "$user" ]; then
+    echo "enviroment \$USER '$USER' does not match '$longname' user '$user'"
+    exit 1
+  fi
+fi
+
+
+log_file=`$RADOSGW -c ${ceph_conf_file} -n $longname --show-config-value log_file`
+if [ -n "$log_file" ]; then
+  if [ ! -f "$log_file" ]; then
+    touch "$log_file"
+    touchrc=$?
+    if [ 0 != $touchrc ] ; then
+      exit $touchrc
+    fi
+  fi
+fi

systemd/ceph-radosgw@.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Ceph rados gateway
+After=network-online.target local-fs.target
+Wants=network-online.target local-fs.target
+PartOf=ceph.target
+
+[Service]
+EnvironmentFile=-/etc/sysconfig/ceph
+Environment=CLUSTER=ceph
+ExecStart=/usr/bin/radosgw -f --conf /etc/ceph/${CLUSTER}.conf --name client.radosgw.%i
+ExecStartPre=/usr/lib/ceph-radosgw/ceph-radosgw-prestart.sh --cluster ${CLUSTER} --name %i
+User=wwwrun
+
+[Install]
+WantedBy=ceph.target