Deploying all instances at once risks widespread failures if an update introduces issues. Batch and instance group releases let you update a subset of instances first, verify the results, and then proceed to the rest.
EDAS supports three release strategies:
| Strategy | Description |
|---|---|
| Multi-batch release | Splits instances into sequential batches and updates them in order. |
| Release by instance group | Targets a specific instance group, a logical subset of instances within a cluster. |
| Multi-batch release by instance group | Targets a specific group and splits the release into multiple batches within that group. |
Prerequisites
Before you begin, make sure that you have:
An application created in EDAS
(Optional) Instance groups, if you plan to release by group. See the Create instance groups section below
Deploy a release in batches
Go to the application details page and click Deploy in the upper-right corner.
On the Select Deployment Mode page, find the Regular Release (Single-batch/Multi-batch) section and click Start Deployment.
On the Regular Release (Single-batch/Multi-batch) page, configure the deployment package:
Set the File Uploading Method and upload your WAR or JAR package.
Set the Version parameter.
In the Release Policy section, configure the following settings:
Parameter Description Group Select the instance group to which you want to release the application. Batches per Group Select the number of batches in which you want to release the application. Batch Mode Select Automatic or Manual. Click OK to start the release.
Create instance groups (optional)
Instance groups organize instances into logical subsets -- for example, a "beta" group for early validation and a "production" group for the rest. Create groups before you start a release.
On the application details page, go to Basic Information > Instance Information.
Click Create Group. In the Create Group dialog box, enter a name (for example,
beta) in the Group Name field and click Create.Move instances into the new group: In the Default Group section, find the target instance and click Change Group in the Actions column.
In the Change Group dialog box, select the target group from the Target Group drop-down list and click OK.
Repeat steps 3--4 for each instance you want to add to the group.
For more information, see Manage instance groups in an ECS cluster.