docs: Add nomad alloc signal docs

website/source/docs/commands/alloc.html.md.erb

@@ -20,11 +20,13 @@ subcommands are available:
 * [`alloc fs`][fs] - Inspect the contents of an allocation directory
 * [`alloc logs`][logs] - Streams the logs of a task
 * [`alloc restart`][restart] - Restart a running allocation or task
+* [`alloc signal`][signal] - Signal a running allocation
 * [`alloc status`][status] - Display allocation status information and metadata
 * [`alloc stop`][stop] - Stop and reschedule a running allocation
 
 [fs]: /docs/commands/alloc/fs.html "Inspect the contents of an allocation directory"
 [logs]: /docs/commands/alloc/logs.html "Streams the logs of a task"
 [restart]: /docs/commands/alloc/restart.html "Restart a running allocation or task"
+[status]: /docs/commands/alloc/signal.html "Signal a running allocation"
 [status]: /docs/commands/alloc/status.html "Display allocation status information and metadata"
 [stop]: /docs/commands/alloc/stop.html "Stop and reschedule a running allocation"

website/source/docs/commands/alloc/signal.html.md.erb

@@ -0,0 +1,44 @@
+---
+layout: "docs"
+page_title: "Commands: alloc signal"
+sidebar_current: "docs-commands-alloc-signal"
+description: >
+  Signal a running allocation or task
+---
+
+# Command: alloc signal
+
+The `alloc signal` command allows a user to perform an in place signal of an
+an entire allocation or individual task.
+
+## Usage
+
+```
+nomad alloc signal [options] <allocation> <task>
+```
+
+This command accepts a single allocation ID and a task name. The task name must
+be part of the allocation and the task must be currently running. The task name
+is optional and if omitted every task in the allocation will be signaled.
+
+## General Options
+
+<%= partial "docs/commands/_general_options" %>
+
+## Signal Options
+
+* `-s`: Signal to send to the tasks. Valid options depend on the driver.
+
+* `-verbose`: Display verbose output.
+
+## Examples
+
+```
+$ nomad alloc signal eb17e557
+
+$ nomad alloc signal eb17e557 foo
+Could not find task named: foo, found:
+* test
+<blocking>
+```
+