Cherry-pick #16518 to 7.x: Update redis host settings docs (#16552)

* Update redis host settings docs

The redis host setting accepts passwords and URL schemas by now.
This change update the reference config files and docs.

(cherry picked from commit c4671eb)

auditbeat/auditbeat.reference.yml

@@ -788,6 +788,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

filebeat/filebeat.reference.yml

@@ -1493,6 +1493,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

heartbeat/heartbeat.reference.yml

@@ -932,6 +932,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

journalbeat/journalbeat.reference.yml

@@ -726,6 +726,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

libbeat/_meta/config.reference.yml.tmpl

@@ -669,6 +669,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

libbeat/outputs/redis/docs/redis.asciidoc

@@ -45,6 +45,12 @@ distributed to the servers in the list. If one server becomes unreachable, the e
 distributed to the reachable servers only. You can define each Redis server by specifying
 `HOST` or `HOST:PORT`. For example: `"192.15.3.2"` or `"test.redis.io:12345"`. If you
 don't specify a port number, the value configured by `port` is used.
+Configure each Redis server with an `IP:PORT` pair or with a `URL`. For
+example: `redis://localhost:6379` or `rediss://localhost:6379`.
+URLs can include a server-specific password. For example: `redis://:password@localhost:6379`.
+The `redis` scheme will disable the `ssl` settings for the host, while `rediss`
+will enforce TLS.  If `rediss` is specified and no `ssl` settings are
+configured, the output uses the system certificate store.
 
 ===== `index`
 

metricbeat/metricbeat.reference.yml

@@ -1480,6 +1480,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

packetbeat/packetbeat.reference.yml

@@ -1210,6 +1210,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

winlogbeat/winlogbeat.reference.yml

@@ -711,6 +711,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

x-pack/auditbeat/auditbeat.reference.yml

@@ -839,6 +839,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

x-pack/filebeat/filebeat.reference.yml

@@ -2039,6 +2039,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

x-pack/metricbeat/metricbeat.reference.yml

@@ -1724,6 +1724,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The

x-pack/winlogbeat/winlogbeat.reference.yml

@@ -714,6 +714,8 @@ output.elasticsearch:
   # The list of Redis servers to connect to. If load-balancing is enabled, the
   # events are distributed to the servers in the list. If one server becomes
   # unreachable, the events are distributed to the reachable servers only.
+  # The hosts setting supports redis and rediss urls with custom password like
+  # redis://:password@localhost:6379.
   #hosts: ["localhost:6379"]
 
   # The name of the Redis list or channel the events are published to. The