From 1ec3e8276f43bce56165dce441461f3135ea717b Mon Sep 17 00:00:00 2001
From: Jeff Mitchell <jeffrey.mitchell@gmail.com>
Date: Mon, 26 Oct 2020 12:10:01 -0400
Subject: [PATCH] Add Unix listener docs (#750)

Co-authored-by: Jeff Malnick <malnick@gmail.com>
---
 .../docs/configuration/listener/index.mdx     |   3 +-
 .../docs/configuration/listener/tcp.mdx       |   2 +-
 .../docs/configuration/listener/unix.mdx      | 161 ++++++++++++++++++
 website/data/docs-navigation.js               |   5 +-
 4 files changed, 168 insertions(+), 3 deletions(-)
 create mode 100644 website/content/docs/configuration/listener/unix.mdx

diff --git a/website/content/docs/configuration/listener/index.mdx b/website/content/docs/configuration/listener/index.mdx
index a9f45ab8b..4822052ba 100644
--- a/website/content/docs/configuration/listener/index.mdx
+++ b/website/content/docs/configuration/listener/index.mdx
@@ -10,6 +10,7 @@ description: |-
 # `listener` Stanza
 
 The `listener` stanza configures the addresses and ports on which Boundary will
-respond to requests. At this time, there is only one listener - [TCP][tcp].
+respond to requests. At this time, there are two listeners - [TCP][tcp] and [Unix][unix].
 
 [tcp]: /docs/configuration/listener/tcp
+[unix]: /docs/configuration/listener/unix
\ No newline at end of file
diff --git a/website/content/docs/configuration/listener/tcp.mdx b/website/content/docs/configuration/listener/tcp.mdx
index 8b3f7dcba..8a27c6631 100644
--- a/website/content/docs/configuration/listener/tcp.mdx
+++ b/website/content/docs/configuration/listener/tcp.mdx
@@ -46,7 +46,7 @@ allowed.
 
 - `http_write_timeout` `string: "0")` - Specifies the maximum duration before
   timing out writes of the response and is reset whenever a new request's header
-  is read. The default value of `"0"` means inifinity. This is specified using a
+  is read. The default value of `"0"` means infinity. This is specified using a
   label suffix like `"30s"` or `"1h"`.
 
 <!-- We don't have this implemented yet
diff --git a/website/content/docs/configuration/listener/unix.mdx b/website/content/docs/configuration/listener/unix.mdx
new file mode 100644
index 000000000..4aea9e8a4
--- /dev/null
+++ b/website/content/docs/configuration/listener/unix.mdx
@@ -0,0 +1,161 @@
+---
+layout: docs
+page_title: Unix Domain Socket - Listeners - Configuration
+sidebar_title: Unix
+description: |-
+  The Unix listener configures Boundary to listen on the specified Unix domain socket.
+---
+
+# `unix` Listener
+
+The Unix listener configures Boundary to listen on a Unix domain socket.
+
+~> This is only available for listeners for `"api"` and `"cluster"` purpose.
+Unix sockets cannot currently be used for `"proxy"` purpose on a Worker.
+
+```hcl
+listener "unix" {
+  purpose = "api"
+  address = "/var/run/boundary-api.sock"
+}
+```
+
+The `listener` stanza may be specified more than once to make Boundary listen on
+multiple interfaces; however, only one listener marked for `cluster` purpose is
+allowed.
+
+## `unix` Listener Parameters
+
+- `purpose` `(string: "")` - Specifies the purpose. Can be `api` or `cluster`.
+
+- `address` `(string: "")` – Specifies the address (filesystem path) to bind to
+  for listening.
+
+- `http_idle_timeout` `(string: "5m")` - Specifies the maximum amount of time to
+  wait for the next request when keep-alives are enabled. If `http_idle_timeout`
+  is zero, the value of `http_read_timeout` is used. If both are zero, the value
+  of `http_read_header_timeout` is used. This is specified using a label suffix
+  like `"30s"` or `"1h"`.
+
+- `http_read_header_timeout` `(string: "10s")` - Specifies the amount of time
+  allowed to read request headers. This is specified using a label suffix like
+  `"30s"` or `"1h"`.
+
+- `http_read_timeout` `(string: "30s")` - Specifies the maximum duration for
+  reading the entire request, including the body. This is specified using a
+  label suffix like `"30s"` or `"1h"`.
+
+- `http_write_timeout` `string: "0")` - Specifies the maximum duration before
+  timing out writes of the response and is reset whenever a new request's header
+  is read. The default value of `"0"` means infinity. This is specified using a
+  label suffix like `"30s"` or `"1h"`.
+
+<!-- We don't have this implemented yet
+- `max_request_size` `(int: 33554432)` – Specifies a hard maximum allowed
+  request size, in bytes. Defaults to 32 MB. Specifying a number less than or
+  equal to `0` turns off limiting altogether.
+!-->
+
+- `max_request_duration` `(string: "90s")` – Specifies the maximum
+  request duration allowed before Boundary cancels the request. This overrides
+  `default_max_request_duration` for this listener.
+
+- `tls_disable` `(string: "false")` – Specifies if TLS will be disabled. Boundary
+  assumes TLS by default, so you must explicitly disable TLS to opt-in to
+  insecure communication.
+
+- `tls_cert_file` `(string: <required-if-enabled>, reloads-on-SIGHUP)` –
+  Specifies the path to the certificate for TLS. To configure the listener to
+  use a CA certificate, concatenate the primary certificate and the CA
+  certificate together. The primary certificate should appear first in the
+  combined file. On `SIGHUP`, the path set here _at Boundary startup_ will be used
+  for reloading the certificate; modifying this value while Boundary is running
+  will have no effect for `SIGHUP`s.
+
+- `tls_key_file` `(string: <required-if-enabled>, reloads-on-SIGHUP)` –
+  Specifies the path to the private key for the certificate. If the key file
+  is encrypted, you will be prompted to enter the passphrase on server startup.
+  The passphrase must stay the same between key files when reloading your
+  configuration using `SIGHUP`. On `SIGHUP`, the path set here _at Boundary
+  startup_ will be used for reloading the certificate; modifying this value
+  while Boundary is running will have no effect for `SIGHUP`s.
+
+- `tls_min_version` `(string: "tls12")` – Specifies the minimum supported
+  version of TLS. Accepted values are "tls10", "tls11", "tls12" or "tls13".
+
+  ~> **Warning**: TLS 1.1 and lower are generally considered insecure.
+
+- `tls_cipher_suites` `(string: "")` – Specifies the list of supported
+  ciphersuites as a comma-separated-list. The list of all available ciphersuites
+  is available in the [Golang TLS documentation][golang-tls].
+
+- `tls_prefer_server_cipher_suites` `(string: "false")` – Specifies to prefer the
+  server's ciphersuite over the client ciphersuites.
+
+- `tls_require_and_verify_client_cert` `(string: "false")` – Turns on client
+  authentication for this listener; the listener will require a presented
+  client cert that successfully validates against system CAs.
+
+- `tls_client_ca_file` `(string: "")` – PEM-encoded Certificate Authority file
+  used for checking the authenticity of client.
+
+<!-- Not enabled yet
+- `x_forwarded_for_authorized_addrs` `(string: <required-to-enable>)` –
+  Specifies the list of source IP CIDRs for which an X-Forwarded-For header
+  will be trusted. Comma-separated list or JSON array. This turns on
+  X-Forwarded-For support.
+
+- `x_forwarded_for_hop_skips` `(string: "0")` – The number of addresses that will be
+  skipped from the _rear_ of the set of hops. For instance, for a header value
+  of `1.2.3.4, 2.3.4.5, 3.4.5.6`, if this value is set to `"1"`, the address that
+  will be used as the originating client IP is `2.3.4.5`.
+
+- `x_forwarded_for_reject_not_authorized` `(string: "true")` – If set false,
+  if there is an X-Forwarded-For header in a connection from an unauthorized
+  address, the header will be ignored and the client connection used as-is,
+  rather than the client connection rejected.
+
+- `x_forwarded_for_reject_not_present` `(string: "true")` – If set false, if
+  there is no X-Forwarded-For header or it is empty, the client address will be
+  used as-is, rather than the client connection rejected.
+
+### `telemetry` Parameters
+
+- `unauthenticated_metrics_access` `(string: "false")` - If set to true, allows
+  unauthenticated access to the `/v1/sys/metrics` endpoint.
+!-->
+
+## `unix` Listener Examples
+
+### Configuring TLS
+
+This example shows enabling a TLS listener.
+
+```hcl
+listener "unix" {
+  purpose = "api"
+  address = "/var/run/boundary-api.sock"
+  tls_cert_file = "/etc/certs/Boundary.crt"
+  tls_key_file  = "/etc/certs/Boundary.key"
+}
+```
+
+### Listening on Multiple Interfaces
+
+This example shows Boundary listening on a private interface, as well as localhost.
+
+```hcl
+listener "tcp" {
+  purpose = "api"
+  address = "/var/run/boundary-api.sock"
+}
+
+listener "tcp" {
+  purpose = "cluster"
+  address = "/var/run/boundary-cluster.sock"
+}
+```
+
+[golang-tls]: https://golang.org/src/crypto/tls/cipher_suites.go
+[api-addr]: /docs/configuration#api_addr
+[cluster-addr]: /docs/configuration#cluster_addr
diff --git a/website/data/docs-navigation.js b/website/data/docs-navigation.js
index dd34b1344..f1bc623ba 100644
--- a/website/data/docs-navigation.js
+++ b/website/data/docs-navigation.js
@@ -61,7 +61,10 @@ export default [
     content: [
       {
         category: 'listener',
-        content: ['tcp'],
+        content: [
+          'tcp',
+          'unix',
+        ],
       },
       {
         category: 'kms',