Merge pull request #763 from hashicorp/vault

Document VAULT_REDIRECT_INTERFACE and VAULT_CLUSTER_INTERFACE

vault/content.md

@@ -53,3 +53,5 @@ This runs a Vault server using the `file` storage backend at path `/vault/file`,
 Note the `--cap-add=IPC_LOCK`: this is required in order for Vault to lock memory, which prevents it from being swapped to disk. This is highly recommended. In a non-development environment, if you do not wish to use this functionality, you must add `"disable_mlock: true"` to the configuration information.
 
 At startup, the server will read configuration HCL and JSON files from `/vault/config` (any information passed into `VAULT_LOCAL_CONFIG` is written into `local.json` in this directory and read as part of reading the directory for configuration files). Please see Vault's [configuration documentation](https://www.vaultproject.io/docs/config/index.html) for a full list of options.
+
+Since 0.6.3 this container also supports the `VAULT_REDIRECT_INTERFACE` and `VAULT_CLUSTER_INTERFACE` environment variables. If set, the IP addresses used for the redirect and cluster addresses in Vault's configuration will be the address of the named interface inside the container (e.g. `eth0`).