helm-external-secrets/docs/snippets/vault-iam-store-controller-pod-identity.yaml

apiVersion: external-secrets.io/v1
kind: SecretStore
metadata:
  name: vault-backend-aws-iam
spec:
  provider:
    vault:
      server: "http://my.vault.server:8200"
      path: secret
      version: v2
      namespace: <vault_namespace>
      auth:
        iam:
          # Path where the AWS auth method is enabled in Vault, e.g: "aws/". Defaults to aws
          path: aws
          # AWS Region. Defaults to us-east-1
          region: us-east-1
          # Vault Role. In vault, a role describes an identity with a set of permissions, groups, or policies you want to attach a user of the secrets engine
          vaultRole: vault-role-for-aws-iam-auth
          # Optional. Placeholder to supply header X-Vault-AWS-IAM-Server-ID. It is an additional (optional) header used by Vault IAM auth method to mitigate against different types of replay attacks. More details here: https://developer.hashicorp.com/vault/docs/auth/aws
          vaultAwsIamServerID: example-vaultAwsIamServerID