HAGuideImprovements/TOC

We are planning to improve the networking section of the HA Guide. This is the proposed TOC.

I. Introduction to OpenStack High Availability

1. Stateless vs. Stateful services
2. Active/Passive
3. Active/Active

II. HA Using Active/Passive

1. The Pacemaker Cluster Stack

1. Installing Packages
2. Setting up Corosync
3. Starting Corosync
4. Starting Pacemaker
5. Setting basic cluster properties

2. Cloud Controller Cluster Stack

1. Highly available MySQL
2. Highly available RabbitMQ

3. API Node Cluster Stack

1. Configure the VIP
2. Highly available OpenStack Identity
3. Highly available OpenStack Image API
4. Highly available Cinder API
5. Highly available OpenStack Networking Server
6. Highly available Ceilometer Central Agent
7. Configure Pacemaker Group

4. Network Controller Cluster Stack

1. Highly available Neutron L3 Agent
2. Highly available Neutron DHCP Agent
3. Highly available Neutron Metadata Agent
4. Manage network resources

III. HA Using Active/Active

5. Database

1. MySQL with Galera
2. Galera Monitoring Scripts
3. Other ways to provide a Highly Available database

6. RabbitMQ

1. Install RabbitMQ
2. Configure RabbitMQ
3. Configure OpenStack Services to use RabbitMQ

7. HAproxy Nodes 8. OpenStack Controller Nodes

1. Running OpenStack API & schedulers
2. Memcached

9. OpenStack Network Nodes

1. Running Neutron DHCP Agent
2. Running Neutron L3 Agent
3. Running Neutron Metadata Agent

Strategy and assumptions:

1. Audience is people who have some experience installing OpenStack, not first time users
2. Focus on installation of OpenStack core services
3. Structure the guide sequentially -- the steps to take in a reasonable order
4. Avoid redundancy with the Install Guide; for steps that are identical for HA and non-HA installations, link to appropriate sections in the Install Guide
6. Emphasize a reasonable, standard deployment based on open source components. We can provide some notes about alternatives as appropriate (for example, using a commercial load-balancer might be a better alternative than relying on HAProxy)