debian: create ceph user and group

Use Debian base-passwd allocated UID/GID pair.

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/debian/ceph-common.postinst  b/debian/ceph-common.postinst 
new file mode 100644 (file)
index 0000000..896dbeb
--- /dev/null
+++ b/debian/ceph-common.postinst 
@@ -0,0 +1,90 @@
+#!/bin/sh
+# vim: set noet ts=8:
+# postinst script for ceph-mds
+#
+# see: dh_installdeb(1)
+
+set -e
+
+# summary of how this script can be called:
+#
+#      postinst configure <most-recently-configured-version>
+#      old-postinst abort-upgrade <new-version>
+#      conflictor's-postinst abort-remove in-favour <package> <new-version>
+#      postinst abort-remove
+#      deconfigured's-postinst abort-deconfigure in-favour <failed-install-package> <version> [<removing conflicting-package> <version>]
+#
+
+# for details, see http://www.debian.org/doc/debian-policy/ or
+# the debian-policy package
+
+
+# Let the admin override these distro-specified defaults.  This is NOT
+# recommended!
+[ -f "/etc/default/ceph" ] && . /etc/default/ceph
+
+[ -z "$SERVER_HOME" ] && SERVER_HOME=/var/lib/ceph
+[ -z "$SERVER_USER" ] && SERVER_USER=ceph
+[ -z "$SERVER_NAME" ] && SERVER_NAME="Ceph storage service"
+[ -z "$SERVER_GROUP" ] && SERVER_GROUP=ceph
+[ -z "$SERVER_UID" ] && SERVER_UID=64045  # alloc by Debian base-passwd maintainer
+
+# Groups that the user will be added to, if undefined, then none.
+[ -z "$SERVER_ADDGROUP" ] && SERVER_ADDGROUP=
+
+case "$1" in
+    configure)
+       # create user to avoid running server as root
+       # 1. create group if not existing
+       if ! getent group | grep -q "^$SERVER_GROUP:" ; then
+          echo -n "Adding group $SERVER_GROUP.."
+          addgroup --quiet --system --gid $SERVER_GID \
+             $SERVER_GROUP 2>/dev/null ||true
+          echo "..done"
+       fi
+       # 2. create user if not existing
+       if ! getent passwd | grep -q "^$SERVER_USER:"; then
+         echo -n "Adding system user $SERVER_USER.."
+         adduser --quiet \
+                 --system \
+                 --ingroup $SERVER_GROUP \
+                 --no-create-home \
+                 --disabled-password \
+                --uid $SERVER_UID \
+                --gid $SERVER_GID \
+                 $SERVER_USER 2>/dev/null || true
+         echo "..done"
+       fi
+       # 3. adjust passwd entry
+       usermod -c "$SERVER_NAME" \
+               -d $SERVER_HOME   \
+               -g $SERVER_GROUP  \
+                  $SERVER_USER
+       # 4. Add the user to extra groups
+       if test -n $SERVER_ADDGROUP
+       then
+           if ! groups $SERVER_USER | cut -d: -f2 | \
+              grep -qw $SERVER_ADDGROUP; then
+               echo -n "Adding user $SERVER_USER to groups $SERVER_ADDGROUP.."
+                adduser $SERVER_USER $SERVER_ADDGROUP
+               echo "..done"
+           fi
+       fi
+
+    ;;
+    abort-upgrade|abort-remove|abort-deconfigure)
+       :
+    ;;
+
+    *)
+        echo "postinst called with unknown argument \`$1'" >&2
+        exit 1
+    ;;
+esac
+
+# dh_installdeb will replace this with shell code automatically
+# generated by other debhelper scripts.
+
+#DEBHELPER#
+
+exit 0