Instance group configuration update

On public image-based VMs, the OS and software are not updated automatically. You can update them on your own.

To do this:

  1. Describe the appropriate instance template.
  2. Set the desired deployment policy.
  3. Run the update operation for the group.

Update with group degradation

Sequential updates of instances in a group.

For example, to update a group by taking one instance out of service at a time, set the following parameters in the deploy-policy:

...
deploy-policy:
    max_unavailable: 1
    max_expansion: 0
    ...
...

Update with additional resources allocated

Update by creating instances with a new configuration. As you add instances with a new configuration to the group, those with the old configuration are deleted.

For example, to update one group instance at a time, set the following parameters in the deploy-policy:

...
deploy-policy:
    max_unavailable = 0
    max_expansion = 1
    ...
...