Create devstack plugin for osprofiler configuration

Change-Id: Ifd6f90ea1d39d7385f1ab099bc7b0b2ed59efac5
Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/devstack/README.rst b/devstack/README.rst
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+++ b/devstack/README.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) 2017 OPNFV.
+
+====================================
+Enabling OPNFV Doctor using DevStack
+====================================
+
+This directory contains the files necessary to run OpenStack with enabled
+OPNFV Doctor in DevStack.
+
+To configure DevStack to enable OPNFV Doctor edit
+``${DEVSTACK_DIR}/local.conf`` file and add::
+
+    enable_plugin aodh http://git.openstack.org/openstack/aodh
+    enable_plugin panko https://git.openstack.org/openstack/panko
+    enable_plugin ceilometer https://git.openstack.org/openstack/ceilometer
+    enable_plugin osprofiler https://git.openstack.org/openstack/osprofiler
+    enable_plugin doctor https://git.opnfv.org/doctor
+
+to the ``[[local|localrc]]`` section.
+
+.. note:: The order of enabling plugins matters.
+
+Run DevStack as normal::
+
+    $ ./stack.sh

diff --git a/devstack/plugin.sh b/devstack/plugin.sh
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+#!/usr/bin/env bash
+
+##############################################################################
+# Copyright (c) 2017 ZTE Corporation and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+# Defaults
+# --------
+
+CONF_FILES=(
+    $CINDER_CONF
+    $HEAT_CONF
+    $KEYSTONE_CONF
+    $NOVA_CONF
+    $NEUTRON_CONF
+    $GLANCE_API_CONF
+    $GLANCE_REGISTRY_CONF
+# Supported by osprofiler but not used in doctor at the moment
+#    $TROVE_CONF
+#    $TROVE_CONDUCTOR_CONF
+#    $TROVE_GUESTAGENT_CONF
+#    $TROVE_TASKMANAGER_CONF
+#    $SENLIN_CONF
+#    $MAGNUM_CONF
+#    $ZUN_CONF
+)
+
+function install_doctor {
+    # no-op
+    :
+}
+
+function configure_doctor {
+    for conf in ${CONF_FILES[@]}; do
+        if [ -f $conf ]
+        then
+            iniset $conf profiler enabled true
+            iniset $conf profiler trace_sqlalchemy true
+            iniset $conf profiler hmac_keys $(iniget $conf profiler hmac_keys),${DOCTOR_HMAC_KEYS:=doctor}
+            iniset $conf profiler connection_string ${OSPROFILER_CONNECTION_STRING:=redis://127.0.0.1:6379}
+        fi
+    done
+}
+
+function init_doctor {
+    # no-op
+    :
+}
+
+# check for service enabled
+if is_service_enabled doctor; then
+
+    if [[ "$1" == "stack" && "$2" == "pre-install" ]]; then
+        # Set up system services
+        echo_summary "Configuring system services Doctor"
+        # install_package cowsay
+
+    elif [[ "$1" == "stack" && "$2" == "install" ]]; then
+        # Perform installation of service source
+        echo_summary "Installing Doctor"
+        install_doctor
+
+    elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
+        # Configure after the other layer 1 and 2 services have been configured
+        echo_summary "Configuring Doctor"
+        configure_doctor
+
+    elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
+        # Initialize and start the doctor service
+        echo_summary "Initializing Doctor"
+        init_doctor
+    fi
+
+    if [[ "$1" == "unstack" ]]; then
+        # Shut down doctor services
+        # no-op
+        :
+    fi
+
+    if [[ "$1" == "clean" ]]; then
+        # Remove state and transient data
+        # Remember clean.sh first calls unstack.sh
+        # no-op
+        :
+    fi
+fi
+

diff --git a/devstack/settings b/devstack/settings
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+# setting file for doctor
+
+enable_service doctor