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Openstack high availability guide

docs openstack org COpenStack High Availability Guide October OpenStack High Availability Guide current - - Copyright ? - OpenStack Contributors All rights reserved current This guide describes how to install con ?gure and manage OpenStack for high availability Licensed under the Apache License Version the License you may not use this ?le except in compliance with the License You may obtain a copy of the License at http www apache org licenses LICENSE- Unless required by applicable law or agreed to in writing software distributed under the License is distributed on an AS IS BASIS WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied See the License for the speci ?c language governing permissions and limitations under the License ii COpenStack High Availability Guide October current Table of Contents Preface v Conventions v Document change history v Introduction to OpenStack High Availability Stateless vs Stateful services Active Passive Active Active I HA using active passive The Pacemaker cluster stack Install packages Set up Corosync Starting Corosync Start Pacemaker Set basic cluster properties Cloud controller cluster stack Highly available MySQL Highly available RabbitMQ API node cluster stack Con ?gure the VIP Highly available OpenStack Identity Highly available OpenStack Image API Highly available Block Storage API Highly available OpenStack Networking server Highly available Telemetry central agent Con ?gure Pacemaker group Network controller cluster stack Highly available neutron L agent Highly available neutron DHCP agent Highly available neutron metadata agent Manage network resources II HA using active active Database MySQL with Galera Galera monitoring scripts Other ways to provide a highly available database RabbitMQ Install RabbitMQ Con ?gure RabbitMQ Con ?gure OpenStack services to use RabbitMQ HAProxy nodes OpenStack controller nodes Run OpenStack API and schedulers Memcached OpenStack network nodes Run neutron DHCP agent Run neutron L agent Run neutron metadata agent A Community support iii COpenStack High Availability Guide October current Documentation ask openstack org OpenStack mailing lists The OpenStack wiki The Launchpad Bugs area The OpenStack IRC channel Documentation feedback OpenStack distribution packages iv COpenStack High Availability Guide Preface October current Conventions The OpenStack documentation uses several typesetting conventions Notices Notices take these forms Note A handy tip or reminder Important Something you must be aware of before proceeding Warning Critical information about the risk of data loss or security issues Command prompts prompt Any user including the root user can run commands that are pre ?xed with the prompt prompt The root user must run commands that are pre ?xed with the prompt You can also pre ?x these commands with the sudo command if available to run them Document change history This version of the guide replaces and obsoletes all earlier versions The following table describes the most recent changes Revision Date May April January May Summary of Changes ? Conversion to Docbook ? Minor cleanup of typos otherwise no major revisions for Icehouse release ? Organizes guide based on cloud controller and compute nodes ? Begin trunk designation v COpenStack High Availability Guide October current Introduction