How do I shut down OpenStack?

How do I shut down OpenStack?

To shut down an entire OpenStack environment:

1. Log in to any controller node or any Ceph OSD node and type: ceph osd set noout.
2. Verify the noout flag is set: ceph -s. The output of the command above should show the noout flag set into the health status.

How do I restart OpenStack?

1. Log in to a controller node CLI.
2. Restart the Corosync and Pacemaker services: # service corosync restart # service pacemaker restart.
3. Verify the status of the Corosync and Pacemaker services. See Verify an OpenStack service status.
4. Repeat step 1 – 3 on all controller nodes.

How do I check my OpenStack instance status?

Creating an instance using the command line¶

1. Log in to any utility container.
2. Issue the openstack server create command with a name for the instance, along with the name of the image and flavor to use:
3. To check that the instance was created successfully, issue the openstack server list command:

What is rebuild instance OpenStack?

OpenStack, and in particular the compute service, Nova, has a useful rebuild function that allows you to rebuild an instance from a fresh image while maintaining the same fixed and floating IP addresses, amongst other metadata.

What is Server rebuild?

REBUILDING A SERVER WILL DELETE ALL CURRENT DATA ON THE SERVER.

Which of the following happens to an instance in an openstack environment when it is soft rebooted?

Reboot an instance¶ A soft reboot attempts a graceful shut down and restart of the instance. Rescue mode provides a mechanism for access, even if an image renders the instance inaccessible. By default, it starts an instance from the initial image attaching the current boot disk as a secondary one.

What is the functionality of a security group in an openstack environment?

A security group is a named collection of network access rules that are use to limit the types of traffic that have access to instances. When you launch an instance, you can assign one or more security groups to it.

What is OpenStack instance?

OpenStack virtual machines are called instances, mostly because they are instances of an image that is created upon request and that is configured when launched. In the persistent model, the instance is launched from a persistent volume on a compute node, or from a block storage volume, and not from the Image service.

How do I know if OpenStack is running?

Verify an OpenStack service status¶

1. On every MongoDB node, run:
2. On every controller node, run:
3. On every compute node, run:
4. On any controller node, run pcs status | grep ceilometer or crm status | grep ceilometer to verify which node is currently handling requests and their status.