OpenSearch/docs/en/security/tribe-clients-integrations/logstash.asciidoc

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[[logstash]]
=== Logstash and Security
The Logstash Elasticsearch plugins (
{logstash-ref}/plugins-outputs-elasticsearch.html[output],
{logstash-ref}/plugins-inputs-elasticsearch.html[input],
{logstash-ref}/plugins-filters-elasticsearch.html[filter]
and {logstash-ref}/monitoring-logstash.html[monitoring]
support authentication and encryption over HTTP.
To use Logstash with a secured cluster, you need to configure authentication
credentials for Logstash. Logstash throws an exception and the processing
pipeline is halted if authentication fails.
If encryption is enabled on the cluster, you also need to enable SSL in the
Logstash configuration.
If you wish to monitor your logstash instance with x-pack monitoring, and store
the monitoring data in a secured elasticsearch cluster, you must configure Logstash
with a username and password for a user with the appropriate permissions.
In addition to configuring authentication credentials for Logstash, you need
to grant authorized users permission to access the Logstash indices.
[float]
[[ls-http-auth-basic]]
==== Configuring Logstash to use Basic Authentication
Logstash needs to be able to manage index templates, create indices,
and write and delete documents in the indices it creates.
To set up authentication credentials for Logstash:
. Create a `logstash_writer` role that has the `manage_index_templates` cluster
privilege, and the `write`, `delete`, and `create_index` privileges for the
Logstash indices. You can create roles from the **Management > Roles** UI in
Kibana or through the `role` API:
+
[source, sh]
---------------------------------------------------------------
POST _xpack/security/role/logstash_writer
{
"cluster": ["manage_index_templates", "monitor"],
"indices": [
{
"names": [ "logstash-*" ], <1>
"privileges": ["write","delete","create_index"]
}
]
}
---------------------------------------------------------------
<1> If you use a custom Logstash index pattern, specify that pattern
instead of the default `logstash-*` pattern.
. Create a `logstash_internal` user and assign it the `logstash_writer` role.
You can create users from the **Management > Users** UI in Kibana or through
the `user` API:
+
[source, sh]
---------------------------------------------------------------
POST _xpack/security/user/logstash_internal
{
"password" : "changeme",
"roles" : [ "logstash_writer"],
"full_name" : "Internal Logstash User"
}
---------------------------------------------------------------
. Configure Logstash to authenticate as the `logstash_internal` user you just
created. You configure credentials separately for each of the Elasticsearch
plugins in your Logstash `.conf` file. For example:
+
[source,js]
--------------------------------------------------
input {
...
user => logstash_internal
password => changeme
}
filter {
...
user => logstash_internal
password => changeme
}
output {
elasticsearch {
...
user => logstash_internal
password => changeme
}
--------------------------------------------------
[float]
[[ls-user-access]]
==== Granting Users Access to the Logstash Indices
To access the indices Logstash creates, users need the `read` and
`view_index_metadata` privileges:
. Create a `logstash_reader` role that has the `read and `view_index_metadata`
privileges for the Logstash indices. You can create roles from the
**Management > Roles** UI in Kibana or through the `role` API:
+
[source, sh]
---------------------------------------------------------------
POST _xpack/security/role/logstash_reader
{
"indices": [
{
"names": [ "logstash-*" ], <1>
"privileges": ["read","view_index_metadata"]
}
]
}
---------------------------------------------------------------
<1> If you use a custom Logstash index pattern, specify that pattern
instead of the default `logstash-*` pattern.
. Assign your Logstash users the `logstash_reader` role. You can create
and manage users from the **Management > Users** UI in Kibana or through
the `user` API:
+
[source, sh]
---------------------------------------------------------------
POST _xpack/security/user/logstash_user
{
"password" : "changeme",
"roles" : [ "logstash_reader"],
"full_name" : "Kibana User"
}
---------------------------------------------------------------
[float]
[[ls-http-auth-pki]]
===== Configuring the elasticsearch Output to use PKI Authentication
The `elasticsearch` output supports PKI authentication. To use an X.509
client-certificate for authentication, you configure the `keystore` and
`keystore_password` options in your Logstash `.conf` file:
[source,js]
--------------------------------------------------
output {
elasticsearch {
...
keystore => /path/to/keystore.jks
keystore_password => realpassword
truststore => /path/to/truststore.jks <1>
truststore_password => realpassword
}
}
--------------------------------------------------
<1> If you use a separate truststore, the truststore path and password are
also required.
[float]
[[ls-http-ssl]]
===== Configuring Logstash to use TLS Encryption
If TLS encryption is enabled on the Elasticsearch cluster, you need to
configure the `ssl` and `cacert` options in your Logstash `.conf` file:
[source,js]
--------------------------------------------------
output {
elasticsearch {
...
ssl => true
cacert => '/path/to/cert.pem' <1>
}
}
--------------------------------------------------
<1> The path to the local `.pem` file that contains the Certificate
Authority's certificate.
[float]
[[ls-monitoring-user]]
===== Configuring Logstash Monitoring
If you wish to ship Logstash {logstash-ref}/logstash-monitoring.html[monitoring]
data to a secure cluster, Logstash must be configured with a username and password.
X-Pack security comes preconfigured with a `logstash_system` user for this purpose.
This user has the minimum permissions necessary for the monitoring function, and
_should not_ be used for any other purpose - it is specifically _not intended_ for
use within a Logstash pipeline.
By default, the `logstash_system` user password is set to `changeme`.
Change this password through the reset password API:
[source,js]
---------------------------------------------------------------------
PUT _xpack/security/user/logstash_system/_password
{
"password": "t0p.s3cr3t"
}
---------------------------------------------------------------------
// CONSOLE
Then configure the user and password in your `logstash.yml` configuration file:
[source,yaml]
----------------------------------------------------------
xpack.monitoring.elasticsearch.username: logstash_system
xpack.monitoring.elasticsearch.password: t0p.s3cr3t
----------------------------------------------------------
If you initially installed an older version of X-Pack, and then upgraded, then
the `logstash_system` user may have defaulted to disabled for security reasons.
You can enable the user with the following API call:
[source,js]
---------------------------------------------------------------------
PUT _xpack/security/user/logstash_system/_enable
---------------------------------------------------------------------
// CONSOLE