»vault Function

Secrets can be read from Vault and used within your template as user variables. the vault function is available only within the default value of a user variable, allowing you to default a user variable to a vault secret.

An example of using a v2 kv engine:

If you store a value in vault using vault kv put secret/hello foo=world, you can access it using the following:

locals {
    foo = vault("/secret/data/hello", "foo")
}

which will assign local.foo with the value "world"

An example of using a v1 kv engine:

If you store a value in vault using:

vault secrets enable -version=1 -path=secrets kv
vault kv put secrets/hello foo=world

You can access it using the following:

locals {
    foo = vault("secrets/hello", "foo")
}

This example accesses the Vault path secret/foo and returns the value stored at the key foo, storing it as the local variable local.foo.

In order for this to work, you must set the environment variables VAULT_TOKEN and VAULT_ADDR to valid values.

The api tool we use allows for more custom configuration of the Vault client via environment variables.

The full list of available environment variables is:

"VAULT_ADDR"
"VAULT_AGENT_ADDR"
"VAULT_CACERT"
"VAULT_CAPATH"
"VAULT_CLIENT_CERT"
"VAULT_CLIENT_KEY"
"VAULT_CLIENT_TIMEOUT"
"VAULT_SKIP_VERIFY"
"VAULT_NAMESPACE"
"VAULT_TLS_SERVER_NAME"
"VAULT_WRAP_TTL"
"VAULT_MAX_RETRIES"
"VAULT_TOKEN"
"VAULT_MFA"
"VAULT_RATE_LIMIT"

and detailed documentation for usage of each of those variables can be found here.