ec620a7765
* implement mdx remote * fix an unfenced code block * fix partials path Co-authored-by: Jim Kalafut <jkalafut@hashicorp.com>
52 lines
2 KiB
Plaintext
52 lines
2 KiB
Plaintext
## The AWS Auth Engine
|
|
|
|
Users of the AWS Auth Engine should be cautious with this upgrade, because in
|
|
1.3.2 we began adding metadata to tokens issued with this method. While the
|
|
metadata does help with tying tokens to a particular person or machine, it
|
|
also can also take a performance toll.
|
|
|
|
Whether there's a performance toll depends on if and how you've configured the
|
|
`auth/aws/config/identity` endpoint. To determine if you could be effected:
|
|
|
|
- Read your identity configuration: `$ vault read auth/aws/config/identity`
|
|
- Determine what Vault is using for identity (`role_id` if unconfigured)
|
|
- Determine what role type(s) you're using (`iam` and/or `ec2`)
|
|
- Consider the rate of change of the metadata fields for each role type
|
|
|
|
Metadata fields for `iam` roles:
|
|
|
|
- `client_arn`
|
|
- `canonical_arn`
|
|
- `client_user_id`
|
|
- `auth_type`
|
|
- `inferred_entity_type`
|
|
- `inferred_entity_id`
|
|
- `inferred_aws_region`
|
|
- `account_id`
|
|
|
|
Metadata fields for `ec2` roles:
|
|
|
|
- `instance_id`
|
|
- `region`
|
|
- `account_id`
|
|
- `ami_id`
|
|
|
|
For example, if you use `role_id` for identity and only `iam` roles, and
|
|
_many_ machines use the same role, you would conclude that the `client_arn`
|
|
for the machines logging in would have a high rate of change, and so you'd
|
|
see a new storage write each time a new machine logged in under that role.
|
|
|
|
If you use `role_id` for identity and only `iam` roles, and
|
|
and only _one_ long-lived machine used the role, you would conclude that the
|
|
`client_arn` for the machines logging in would have a low rate of change.
|
|
Unless you added the optional "role-session" to its ARN, in which case you
|
|
could still have a higher rate of change.
|
|
|
|
However, if you had configured identity to use an `iam_alias` of the `full_arn`,
|
|
or an `ec2_alias` of `instance_id`, you would be likely to see a lower rate of
|
|
change for all fields.
|
|
|
|
For users seeing a performance issue, we recommend implementing one of the
|
|
aliases above, or waiting until a patch is released providing greater
|
|
flexibility around whether to use this functionality.
|