You can launch an instance from the following sources:
Images uploaded to the Image service.
Image that you have copied to a persistent volume.
On the Project tab, open the Compute tab and click Instances
The dashboard shows the instances with its name, its private and floating IP addresses, size, status, task, power state, and so on.
Click Launch Instance.
In the Launch Instance dialog box, specify the following values:
- Instance Name
Assign a name to the virtual machine.
The name you assign here becomes the initial host name of the server.
You can assign a brief description of the virtual machine.
- Availability Zone
To launch several instances, enter a value greater than
1. The default is
- 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 and Device Name for your volume. Click the Delete Volume on Instance Delete option to delete the volume on deleting 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 a Device Name for your volume. Click the Delete Volume on Instance Delete option to delete the volume on deleting the instance.
- Image Name
This field changes based on your previous selection. If you have chosen to launch an instance using an image, the Image Name field displays. Select the image name from the dropdown list.
- Instance Snapshot
This field changes based on your previous selection. If you have chosen to launch an instance using a snapshot, the Instance Snapshot field displays. Select the snapshot name from the dropdown list.
This field changes based on your previous selection. If you have chosen to launch an instance using a volume, the Volume field displays. Select the volume name from the dropdown list. If you want to delete the volume on instance delete, check the Delete Volume on Instance Delete option.
Specify the size of the instance to launch.
The flavor is selected based on the size of the image selected for launching an instance.
- Selected Networks
To add an existing network to the instance, click the + in the Available field.
Network Ports tab
Activate the ports that you want to assign to the instance.
Security Groups tab
- 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.
Key Pair tab
- Key Pair
Specify a key pair.
When prompted for a key pair, select Choose an existing key pair, then select the key pair that you created when setting up.
Alternatively, you can create a new key pair or import one at launch from the instance launch window.
To create a new keypair, Select Create a new key pair, enter a name for the key pair, and then choose Create Keypair. This is the only chance for you to save the private key file, so be sure to select Copy private key to clipboard . Open Notepad or any editor and paste. Save the private key file with the (.pem) extention in a safe place. click "Done" . Remember that you'll need to provide the name of your key pair when you launch an instance and the corresponding private key each time you connect to the instance.
If the image uses a static root password or a static key set although none is recommended by NCS, you do not need to provide a key pair to launch the instance.
- Customization Script Source
Specify a customization script that runs after your instance launches.
- Available Metadata
Add Metadata items to your instance.
Click Launch Instance.
To launch your instance
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.
You can also launch an instance from the Images or Volumes when you launch an instance from an image or a volume respectively.
When you launch an instance from an image, a local copy of the image on the compute node where the instance starts.
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 linux 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
vdafor KVM images or
xvdafor Xen images.
Connect to your instance by using SSH
To use SSH to connect to your instance, use the downloaded keypair file.
You can't connect to your instance unless you launched it with a key pair for
which you have the
.pem file and you launched it with a
security group that allows SSH access from your computer.
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 firstname.lastname@example.org
At the prompt, type
It is also possible to SSH into an instance without a SSH keypair, with your root password.
See Adding SSH Keys for comprehensive documentation on ssh.
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.
On the Project tab, open the Compute tab 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.
On the Project tab, open the Compute tab and click the Instances category.
Select the instance from which to create a snapshot.
In the actions column, click Create Snapshot.
In the Create Snapshot dialog box, enter a name for the snapshot, and click Create 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.
On the Project tab, open the Compute tab and click Instances category.
Select an instance.
In the menu list in the actions 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.