Change which private pool an existing pay-as-you-go instance uses, or remove it from a private pool entirely.
Use cases
Free up pool capacity for new instances: Remove existing instances from a private pool so that the freed capacity can be used to create new instances when resources are constrained.
Apply a pool to running instances: Associate existing instances with a private pool from a purchased capacity reservation to improve utilization and reduce wasted reserved capacity.
Unblock a capacity reservation purchase: If a capacity reservation purchase is rejected due to insufficient resources, set the private pool type of your existing instances to Open. The instances then count as matchable resources, which allows the capacity reservation purchase to succeed.
Prerequisites
Before you begin, make sure you have:
A pay-as-you-go ECS instance (private pool configuration is not supported for subscription instances)
Procedure
Go to the Instances page in the ECS console.
In the top navigation bar, select the region and resource group of the instance.
Click the instance ID. On the Instance Details tab, click All Actions in the upper-right corner, then search for and click Configure Private Pool.
In the Configure Private Pool dialog box, set Private Pool Type to one of the following:
Private Pool Type Behavior Targeted Uses a specific private pool. Enter the ID of a dedicated or open private pool. This ID corresponds to an elastic assurance or an immediate capacity reservation. Open Matches an open private pool. If you attach tags to the instance that match the tags of an elastic assurance or capacity reservation, the instance uses the corresponding open private pool. If no tags are attached, the system automatically selects an untagged open private pool. None Removes the instance from all private pools. The instance uses only the public pool. ImportantRemoving an instance from a private pool may reduce the pool's capacity if the system lacks inventory to replenish it. This applies when you change the type from Targeted to Open, or from Targeted or Open to None. Proceed with caution.
Click Confirm.
Tag matching and rematch behavior
If an instance already matches an open private pool by tag and you need to trigger a rematch, do one of the following:
Enable economical mode for the instance.
Stop and then start the instance.
Restarting the instance does not trigger a rematch.
ID takes precedence over tags
If you specify an open private pool ID and also attach tags that match a different open private pool, the pool with the specified ID is used. For example, if you enter the ID of open private pool A and attach tags matching open private pool B, the instance uses pool A.
Verify the configuration
After you change the private pool configuration, go to the Instance Details tab and check the Private Pool field in the Other Information section to confirm the change. For details, see View a private pool.