Elastic Container Instance:Specify ECS instance types that use local disks to create an elastic container instance

Local disks reside on the same physical server as the elastic container instance to which the disks are attached. Local disks are cost-effective and provide high random IOPS, high throughput, and low latency. Local disks reside on a single physical server, which increases the risks of single points of failure (SPOFs). For more information, see Local disks.

The following ECS instance families with local disks can be used to create elastic container instances:

• d1, big data instance family

• d1ne, big data instance family with enhanced network performance

• i2, instance family with local SSDs

• i2g, instance family with local SSDs

• gn5, GPU-accelerated compute-optimized instance family

For more information about ECS instance types, see the following topics:

• Overview of instance families

• Pricing of ECS instance types

• ECS Instance Types Available for Each Region

When you call the CreateContainerGroup API operation to create an elastic container instance, you can use the InstanceType parameter to specify ECS instance types and the volume-related parameters to attach a local disk. The following table describes relevant parameters. For more information, see CreateContainerGroup.

• Create an elastic container instance that uses a local disk and specify a local disk as a volume

  Parameter	Type	Example	Description
  InstanceType	String	ecs.gn6v-c8g1.2xlarge	The ECS instance types that use local disks. The following ECS instance families that use local disks can be used to create elastic container instances: d1, d1ne, i2, i2g, and gn5. You can specify up to five ECS instance types at a time. Separate multiple instance types with commas (,). Example: ecs.d1.2xlarge,ecs.d1ne.2xlarge.
  Volume.N.Name	String	localdisk	The name of volume N.
  Volume.N.Type	String	EmptyDirVolume	The type of volume N. A value of EmptyDirVolume specifies an emptyDir volume.
  Volume.N.EmptyDirVolume.Medium	String	LocalRaid0	The storage medium for emptyDir volume N. A value of LocalRaid0 specifies RAID 0 that is formed into by local disks.

• Attach RAID 0 to the elastic container instance

  Parameter	Type	Example	Description
  Container.N.VolumeMount.N.Name	String	localdisk	The name of volume N to be attached to container N. This value is the same as the value of Volume.N.Name.
  Container.N.VolumeMount.N.MountPath	String	/localdisk-test	The directory in which volume N is attached. Data in this directory is overwritten by the data on the volume. Make sure that this value is correct.

Sample configurations:

1. Create an elastic container instance that uses a local disk.

   The following code provides an example of the parameters that you need to specify when you call the CreateContainerGroup API operation to create an elastic container instance that uses a local disk.

   ContainerGroupName=test-localdisk
   # Specifies the ECS instance types that use local disks.
   InstanceType=ecs.i2g.2xlarge
   # Specifies the RAID 0 volume that is formed into by local disks.
   Volume.1.Name=localdisk
   Volume.1.Type=EmptyDirVolume
   Volume.1.EmptyDirVolume.Medium=LocalRaid0
   # Attach the RAID 0 volume to the container.
   Container.1.Name=nginx
   Container.1.Image=registry-vpc.cn-hangzhou.aliyuncs.com/eci_open/nginx:1.14.2
   Container.1.VolumeMount.1.Name=localdisk
   Container.1.VolumeMount.1.MountPath=/localdisk-test

2. Check the attached RAID 0.

   Connect to the elastic container instance. Run the df -h command to view the information about the attached RAID 0. Local disks form into RAID 0 (/dev/md0), and RAID 0 is attached to the specified /localdisk-test directory.