Removing a compute host from a host aggregate
by James Denton, Egle Sigler, Cody Bunch, Kevin Jackson
OpenStack Cloud Computing Cookbook - Fourth Edition
- OpenStack Cloud Computing Cookbook Fourth Edition
- Table of Contents
- OpenStack Cloud Computing Cookbook Fourth Edition
- Why subscribe?
- Contributors
- Preface
- 1. Installing OpenStack with Ansible
- Introduction – the OpenStack architecture
- Host network configuration
- Root SSH keys configuration
- Installing Ansible, playbooks, and dependencies
- Configuring the installation
- Running the OpenStack-Ansible playbooks
- Troubleshooting the installation
- Manually testing the installation
- Modifying the OpenStack configuration
- Virtual lab - vagrant up!
- 2. The OpenStack Client
- Introduction – using OpenStack
- Installing Python on Windows
- Installing the OpenStack clients
- Configuring your Linux or macOS environment
- Configuring your Windows environment
- Common OpenStack networking tasks
- Getting ready
- How to do it…
- Creating a network
- Creating a provider network (for use with Floating IPs)
- Creating a new security group
- Adding a rule to a security group
- Creating a router
- Adding a subnet to a router
- 3. Keystone – OpenStack Identity Service
- Introduction – OpenStack Identity
- Creating OpenStack domains in Keystone
- Enabling domains in the OpenStack dashboard
- Creating OpenStack projects in Keystone
- Configuring roles in Keystone
- Adding users in Keystone
- Configuring groups in Keystone
- Deleting projects
- Deleting users
- Deleting roles
- Deleting groups
- Deleting domains
- OpenStack endpoint information
- 4. Neutron – OpenStack Networking
- Introduction to OpenStack networking
- Managing networks, subnets, and ports
- Creating provider networks
- Creating tenant networks
- Creating ports
- Updating network attributes
- Deleting ports
- Deleting networks
- Managing routers and floating IPs
- Attaching networks to routers
- Creating and assigning floating IPs
- Deleting routers
- Managing security groups
- Managing load balancers
- Creating load balancers
- Getting ready
- How to do it…
- How it works...
- Creating pools
- Getting ready
- How to do it…
- How it works...
- Creating members
- Getting ready
- How to do it…
- How it works...
- Creating listeners
- Getting ready
- How to do it…
- How it works...
- Verifying connectivity
- Getting ready
- How to do it…
- 5. Nova – OpenStack Compute
- Introduction to OpenStack Compute
- Adding a compute host using OpenStack-Ansible
- Suspending a host for maintenance
- Configuring Nova Scheduler to use host aggregates
- Creating a host aggregate
- Adding a compute host to a host aggregate
- Removing a compute host from a host aggregate
- Adding metadata to a host aggregate
- Deleting a host aggregate
- Creating an Availability Zone
- Booting an instance into an Availability Zone
- Removing an Availability Zone
- Creating a flavor
- Deleting a flavor
- Setting CPU limits for a flavor
- Setting IOPS limits for a flavor
- Booting an instance
- Stopping an instance
- Deleting an instance
- Live migration
- Snapshotting an instance
- Booting an instance from a snapshot
- Rescuing an instance
- Shelving an instance
- Reviewing the console logs
- 6. Glance – OpenStack Image Service
- 7. Cinder – OpenStack Block Storage
- 8. Swift – OpenStack Object Storage
- 9. OpenStack Orchestration Using Heat and Ansible
- Introduction – orchestrating with OpenStack
- Creating your first stack
- Launching your stack with Heat
- Viewing the resources and output of a stack created with Heat
- Deleting a Heat stack
- Updating a Heat stack
- Installing and configuring Ansible for OpenStack
- Using Ansible to launch instances
- Using Ansible to orchestrate software installation
- Using Ansible to orchestrate software installations across multiple instances
- Using Ansible to fully orchestrate the creation of a web server and load balancer stack
- 10. Using OpenStack Dashboard
- Introduction – OpenStack Dashboard
- Using OpenStack Dashboard for key management
- Using OpenStack Dashboard to manage Neutron networks and routers
- Using OpenStack Dashboard for security group management
- Using OpenStack Dashboard to launch instances
- Using OpenStack Dashboard to delete instances
- Using OpenStack Dashboard to add new projects
- Using OpenStack Dashboard for user management
- Using OpenStack Dashboard with LBaaS
- Using OpenStack Dashboard with OpenStack Orchestration
- Another Book You May Enjoy
- Index
- Creating a network
If the properties of a host change, or the needs of an aggregate change, hosts can be removed from a host aggregate.
To remove a host from a host aggregate, you will need the following information:
- The
openstackcommand-line client - The
openrcfile containing appropriate credentials - The name or ID of the aggregate
- The name or ID of the host
- List hosts already in the aggregate with the following command:
openstack aggregate show cookbook-ssd-hostsThis will bring back an output like the following. Note that the
hostsfield shows the compute hosts that are currently associated with the host aggregate:
- To remove the compute host from this host aggregate, issue the following command:
openstack aggregate remove host cookbook-ssd-hosts compute-01This will bring back the following. Note that in the
hostsfield,compute-01is now missing:
-
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