Container for the parameters to the {@link com.amazonaws.services.ec2.AmazonEC2#runInstances(RunInstancesRequest) RunInstances operation}.
The RunInstances operation launches a specified number of instances.
If Amazon EC2 cannot launch the minimum number AMIs you request, no instances launch. If there is insufficient capacity to launch the maximum number of AMIs you request, Amazon EC2 launches as many as possible to satisfy the requested maximum values.
Every instance is launched in a security group. If you do not specify a security group at launch, the instances start in your default security group. For more information on creating security groups, see CreateSecurityGroup.
An optional instance type can be specified. For information about instance types, see Instance Types.
You can provide an optional key pair ID for each image in the launch request (for more information, see CreateKeyPair). All instances that are created from images that use this key pair will have access to the associated public key at boot. You can use this key to provide secure access to an instance of an image on a per-instance basis. Amazon EC2 public images use this feature to provide secure access without passwords.
IMPORTANT: Launching public images without a key pair ID will leave them inaccessible. The public key material is made available to the instance at boot time by placing it in the openssh_id.pub file on a logical device that is exposed to the instance as /dev/sda2 (the ephemeral store). The format of this file is suitable for use as an entry within ~/.ssh/authorized_keys (the OpenSSH format). This can be done at boot (e.g., as part of rc.local) allowing for secure access without passwords. Optional user data can be provided in the launch request. All instances that collectively comprise the launch request have access to this data For more information, see Instance Metadata.
NOTE: If any of the AMIs have a product code attached for which the user has not subscribed, the RunInstances call will fail.
IMPORTANT: We strongly recommend using the 2.6.18 Xen stock kernel with the c1.medium and c1.xlarge instances. Although the default Amazon EC2 kernels will work, the new kernels provide greater stability and performance for these instance types. For more information about kernels, see Kernels, RAM Disks, and Block Device Mappings.
@see com.amazonaws.services.ec2.AmazonEC2#runInstances(RunInstancesRequest)