Hashicorp Vault AWS dynamic credentials credential_process helper
Download the binary based on your OS. Once uncompressed copy it into your system PATH.
Once installed the following can be added to your ~/.aws/credentials file and your profile will pull dynamic credentials from the vault path specified (Note: the VAULT_TOKEN environment variable needs to be set to a functional vault token on the server you are pointing to):
[profile-name]
region=us-west-2
credential_process=/path/to/vault-cred-helper -path aws/creds/roleName -addr http://127.0.0.1:8200