The sentences are not in meaningful way, so they are corrected Change-Id: I12de76ad21610f84e6b8c89b31b3023c6d98b959 Closes-Bug: #1490256
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Launch and manage instances
Instances are virtual machines that run inside the cloud. You can launch an instance from the following sources:
- Images uploaded to the OpenStack Image service.
- Image that you have copied to a persistent volume. The instance
launches from the volume, which is provided by the
cinder-volume
API through iSCSI.
Launch an instance
When you launch an instance from a volume, note the following steps:
To select the volume from which to launch, launch an instance from an arbitrary image on the volume. The arbitrary image that you select does not boot. Instead, it is replaced by the image on the volume that you choose in the next steps.
To boot a Xen image from a volume, the image you launch in must be the same type, fully virtualized or paravirtualized, as the one on the volume.
Select the volume or volume snapshot from which to boot. Enter a device name. Enter
vda
for KVM images orxvda
for Xen images.
When you launch an instance from an image, OpenStack creates a local copy of the image on the compute node where the instance starts.
Log in to the dashboard, choose a project, and click
Images
.The dashboard shows the images that have been uploaded to OpenStack Image service and are available for this project.
For details on creating images, see Creating images manually in the OpenStack Virtual Machine Image Guide.
Select an image and click
Launch
.In the
Launch Instance
dialog box, specify the following values:Details
tab- Availability Zone
-
By default, this value is set to the availability zone given by the cloud provider (for example,
us-west
orapac-south
). For some cases, it could benova
. - Instance Name
-
Assign a name to the virtual machine.
Note
The name you assign here becomes the initial host name of the server.
After the server is built, if you change the server name in the API or change the host name directly, the names are not updated in the dashboard.
Server names are not guaranteed to be unique when created so you could have two instances with the same host name.
- Flavor
-
Specify the size of the instance to launch.
Note
The flavor is selected based on the size of the image selected for launching an instance. For example, while creating an image, if you have entered the value in the
Minimum RAM (MB)
field as 2048, then on selecting the image, the default flavor ism1.small
. - Instance Count
-
To launch multiple instances, enter a value greater than
1
. The default is1
. - Instance Boot Source
-
Your options are:
- Boot from image
-
If you choose this option, a new field for
Image Name
displays. You can select the image from the list. - Boot from snapshot
-
If you choose this option, a new field for
Instance Snapshot
displays. You can select the snapshot from the list. - Boot from volume
-
If you choose this option, a new field for
Volume
displays. You can select the volume from the list. - Boot from image (creates a new volume)
-
With this option, you can boot from an image and create a volume by entering the
Device Size
andDevice Name
for your volume. Click theDelete on Terminate
option to delete the volume on terminating the instance. - Boot from volume snapshot (creates a new volume)
-
Using this option, you can boot from a volume snapshot and create a new volume by choosing
Volume Snapshot
from a list and adding aDevice Name
for your volume. Click theDelete on Terminate
option to delete the volume on terminating the instance.
Since you are launching an instance from an image,
Boot from image
is chosen by default. - Image Name
-
This field changes based on your previous selection. Since you have chosen to launch an instance using an image, the
Image Name
field displays. Select the image name from the dropdown list.
Access & Security
tab- Keypair
-
Specify a key pair.
If the image uses a static root password or a static key set (neither is recommended), you do not need to provide a key pair to launch the instance.
- Security Groups
-
Activate the security groups that you want to assign to the instance.
Security groups are a kind of cloud firewall that define which incoming network traffic is forwarded to instances.
If you have not created any security groups, you can assign only the default security group to the instance.
Networking
tab- Selected Networks
-
To add a network to the instance, click the
+
in theAvailable Networks
field.
Post-Creation
tab- Customization Script
-
Specify a customization script that runs after your instance launches.
Advanced Options
tab- Disk Partition
-
Select the type of disk partition from the dropdown list:
- Automatic
-
Entire disk is single partition and automatically resizes.
- Manual
-
Faster build times but requires manual partitioning.
Click
Launch
.The instance starts on a compute node in the cloud.
The Instances
tab shows the instance's name, its private and public IP addresses,
size, status, task, and power state.
If you did not provide a key pair, security groups, or rules, users can access the instance only from inside the cloud through VNC. Even pinging the instance is not possible without an ICMP rule configured.
Connect to your instance by using SSH
To use SSH to connect to your instance, you use the downloaded keypair file.
Note
The user name is ubuntu
for the Ubuntu cloud images on
TryStack.
Copy the IP address for your instance.
Use the
ssh
command to make a secure connection to the instance. For example:$ ssh -i MyKey.pem ubuntu@10.0.0.2
At the prompt, type
yes
.
Track usage for instances
You can track usage for instances for each project. You can track costs per month by showing meters like number of vCPUs, disks, RAM, and uptime for all your instances.
- Log in to the dashboard, choose a project, and click
Overview
. - To query the instance usage for a month, select a month and click
Submit
. - To download a summary, click
Download CSV Summary
.
Create an instance snapshot
Log in to the dashboard, choose a project, and click
Instances
.Select the instance from which to create a snapshot.
In the
Actions
column, clickCreate Snapshot
.In the
Create Snapshot
dialog box, enter a name for the snapshot, and clickCreate Snapshot
.The Images category shows the instance snapshot.
To launch an instance from the snapshot, select the snapshot and
click Launch
.
Proceed with launching an instance.
Manage an instance
Log in to the dashboard, choose a project, and click
Instances
.Select an instance.
In the
More
list in theActions
column, select the state.You can resize or rebuild an instance. You can also choose to view the instance console log, edit instance or the security groups. Depending on the current state of the instance, you can pause, resume, suspend, soft or hard reboot, or terminate it.