[[Audit_logging]]
= Audit logging

WildFly comes with audit logging built in for management operations
affecting the management model. By default it is turned off. The
information is output as JSON records.

The default configuration of audit logging in standalone.xml looks as
follows:

[source,xml,options="nowrap"]
----
    <management>
        <security-realms>
...
        </security-realms>
        <audit-log>
            <formatters>
                <json-formatter name="json-formatter"/>
            </formatters>
            <handlers>
                <file-handler name="file" formatter="json-formatter" path="audit-log.log" relative-to="jboss.server.data.dir"/>
            </handlers>
            <logger log-boot="true" log-read-only="true" enabled="false">
                <handlers>
                    <handler name="file"/>
                </handlers>
            </logger>
        </audit-log>
...
----

Looking at this via the CLI it looks like

[source,options="nowrap"]
----
[standalone@localhost:9990 /] /core-service=management/access=audit:read-resource(recursive=true)
{
    "outcome" => "success",
    "result" => {
        "file-handler" => {"file" => {
            "formatter" => "json-formatter",
            "max-failure-count" => 10,
            "path" => "audit-log.log",
            "relative-to" => "jboss.server.data.dir"
        }},
        "json-formatter" => {"json-formatter" => {
            "compact" => false,
            "date-format" => "yyyy-MM-dd HH:mm:ss",
            "date-separator" => " - ",
            "escape-control-characters" => false,
            "escape-new-line" => false,
            "include-date" => true
        }},
        "logger" => {"audit-log" => {
            "enabled" => false,
            "log-boot" => true,
            "log-read-only" => false,
            "handler" => {"file" => {}}
        }},
        "syslog-handler" => undefined
    }
}
----

To enable it via CLI you need just

[source,options="nowrap"]
----
[standalone@localhost:9990 /] /core-service=management/access=audit/logger=audit-log:write-attribute(name=enabled,value=true)
{"outcome" => "success"}
----

Audit data are stored in standalone/data/audit-log.log.

[NOTE]

The audit logging subsystem has a lot of internal dependencies, and it
logs operations changing, enabling and disabling its components. When
configuring or changing things at runtime it is a good idea to make
these changes as part of a CLI batch. For example if you are adding a
syslog handler you need to add the handler and its information as one
step. Similarly if you are using a file handler, and want to change its
`path` and `relative-to` attributes, that needs to happen as one step.

[[audit-logging-json-formatter]]
== JSON Formatter

The first thing that needs configuring is the formatter, we currently
support outputting log records as JSON. You can define several
formatters, for use with different handlers. A log record has the
following format, and it is the formatter's job to format the data
presented:

[source,options="nowrap"]
----
2013-08-12 11:01:12 - {
    "type" : "core",
    "r/o" : false,
    "booting" : false,
    "version" : "8.0.0.Alpha4",
    "user" : "$local",
    "domainUUID" : null,
    "access" : "NATIVE",
    "remote-address" : "127.0.0.1/127.0.0.1",
    "success" : true,
    "ops" : [JMX|WFLY8:JMX subsystem configuration],
        "operation" : "write-attribute",
        "name" : "enabled",
        "value" : true,
        "operation-headers" : {"caller-type" : "user"}
    }]
}
----

It includes an optional timestamp and then the following information in
the json record

[cols=",",options="header"]
|=======================================================================
|Field name |Description

|type |This can have the values core, meaning it is a management
operation, or jmx meaning it comes from the jmx subsystem (see the jmx
subsystem for configuration of the jmx subsystem's audit logging)

|r/o |true if the operation does not change the management model, false
otherwise

|booting |true if the operation was executed during the bootup process,
false if it was executed once the server is up and running

|version |The version number of the WildFly instance

|user |The username of the authenticated user. In this case the
operation has been logged via the CLI on the same machine as the running
server, so the special $local user is used

|domainUUID |An ID to link together all operations as they are
propagated from the Doman Controller to it servers, slave Host
Controllers, and slave Host Controller servers

|access |This can have one of the following values:*NATIVE - The
operation came in through the native management interface, for example
the CLI*HTTP - The operation came in through the domain HTTP interface,
for example the admin console*JMX - The operation came in through the
JMX subsystem. See JMX for how to configure audit logging for JMX.

|remote-address |The address of the client executing this operation

|success |true if the operation succeeded, false if it was rolled back

|ops |The operations being executed. This is a list of the operations
serialized to JSON. At boot this will be all the operations resulting
from parsing the xml. Once booted the list will typically just contain a
single entry
|=======================================================================

The json formatter resource has the following attributes:

[cols=",",options="header"]
|=======================================================================
|Attribute |Description

|include-date |Boolan toggling whether or not to include the timestamp
in the formatted log records

|date-separator |A string containing characters to separate the date and
the rest of the formatted log message. Will be ignored if
include-date=false

|date-format |The date format to use for the timestamp as understood by
java.text.SimpleDateFormat. Will be ignored if include-date=false

|compact |If true will format the JSON on one line. There may still be
values containing new lines, so if having the whole record on one line
is important, set escape-new-line or escape-control-characters to true

|escape-control-characters |If true it will escape all control
characters (ascii entries with a decimal value < 32) with the ascii code
in octal, e.g. a new line becomes '#012'. If this is true, it will
override escape-new-line=false

|escape-new-line |If true it will escape all new lines with the ascii
code in octal, e.g. "#012".
|=======================================================================

== Handlers

A handler is responsible for taking the formatted data and logging it to
a location. There are currently two types of handlers, File and Syslog.
You can configure several of each type of handler and use them to log
information.

=== File handler

The file handlers log the audit log records to a file on the server. The
attributes for the file handler are

[cols=",,",options="header"]
|=======================================================================
|Attribute |Description |Read Only

|formatter |The name of a JSON formatter to use to format the log
records |false

|path |The path of the audit log file |false

|relative-to |The name of another previously named path, or of one of
the standard paths provided by the system. If relative-to is provided,
the value of the path attribute is treated as relative to the path
specified by this attribute |false

|failure-count |The number of logging failures since the handler was
initialized |true

|max-failure-count |The maximum number of logging failures before
disabling this handler |false

|disabled-due-to-failure |true if this handler was disabled due to
logging failures |true
|=======================================================================

In our standard configuration `path=audit-log.log` and
`relative-to=jboss.server.data.dir`, typically this will be
`$JBOSS_HOME/standalone/data/audit-log.log`

[[audit-syslog-handler]]
=== Syslog handler

The default configuration does not have syslog audit logging set up.
Syslog is a better choice for audit logging since you can log to a
remote syslog server, and secure the authentication to happen over TLS
with client certificate authentication. Syslog servers vary a lot in
their capabilities so not all settings in this section apply to all
syslog servers. We have tested with http://www.rsyslog.com[rsyslog].

The address for the syslog handler is
`/core-service=management/access=audit/syslog-handler=*` and just like
file handlers you can add as many syslog entries as you like. The syslog
handler resources reference the main RFC's for syslog a fair bit, for
reference they can be found at: +
* http://www.ietf.org/rfc/rfc3164.txt +
* http://www.ietf.org/rfc/rfc5424.txt +
* http://www.ietf.org/rfc/rfc6587.txt

The syslog handler resource has the following attributes:

[cols=",,",options="header"]
|=======================================================================
|formatter |The name of a JSON formatter to use to format the log
records |false

|failure-count |The number of logging failures since the handler was
initialized |true

|max-failure-count |The maximum number of logging failures before
disabling this handler |false

|disabled-due-to-failure |true if this handler was disabled due to
logging failures |true

|syslog-format |Whether to set the syslog format to the one specified in
RFC-5424 or RFC-3164 |false

|max-length |The maximum length in bytes a log message, including the
header, is allowed to be. If undefined, it will default to 1024 bytes if
the syslog-format is RFC3164, or 2048 bytes if the syslog-format is
RFC5424. |false

|truncate |Whether or not a message, including the header, should
truncate the message if the length in bytes is greater than the maximum
length. If set to false messages will be split and sent with the same
header values |false
|=======================================================================

When adding a syslog handler you also need to add the protocol it will
use to communicate with the syslog server. The valid choices for
protocol are `UDP`, `TCP` and `TLS`. The protocol must be added at the
same time as you add the syslog handler, or it will fail. Also, you can
only add one protocol for the handler.

[[udp]]
==== UDP

Configures the handler to use UDP to communicate with the syslog server.
The address of the `UDP` resource is
`/core-service=management/access=audit/syslog-handler=*/protocol=udp`.
The attributes of the `UDP` resource are:

[cols=",",options="header"]
|==================================================================
|Attribute |Description
|host |The host of the syslog server for the udp requests
|port |The port of the syslog server listening for the udp requests
|==================================================================

[[tcp]]
==== TCP

Configures the handler to use TCP to communicate with the syslog server.
The address of the `TCP` resource is
`/core-service=management/access=audit/syslog-handler=*/protocol=tcp`.
The attributes of the `TCP` resource are:

[cols=",",options="header"]
|=======================================================================
|Attribute |Description

|host |The host of the syslog server for the tcp requests

|port |The port of the syslog server listening for the tcp requests

|message-transfer |The message transfer setting as described in section
3.4 of RFC-6587. This can either be OCTET_COUNTING as described in
section 3.4.1 of RFC-6587, or NON_TRANSPARENT_FRAMING as described in
section 3.4.1 of RFC-6587
|=======================================================================

[[tls]]
==== TLS

Configures the handler to use TLC to communicate securely with the
syslog server. The address of the `TLS` resource is
`/core-service=management/access=audit/syslog-handler=*/protocol=tls`.
The attributes of the `TLS` resource are the same as for `TCP`:

[cols=",",options="header"]
|=======================================================================
|Attribute |Description

|host |The host of the syslog server for the tls requests

|port |The port of the syslog server listening for the tls requests

|message-transfer |The message transfer setting as described in section
3.4 of RFC-6587. This can either be OCTET_COUNTING as described in
section 3.4.1 of RFC-6587, or NON_TRANSPARENT_FRAMING as described in
section 3.4.1 of RFC-6587
|=======================================================================

If the syslog server's TLS certificate is not signed by a certificate
signing authority, you will need to set up a truststore to trust the
certificate. The resource for the trust store is a child of the `TLS`
resource, and the full address is
`/core-service=management/access=audit/syslog-handler=*/protocol=tls/authentication=truststore`.
The attributes of the truststore resource are:

[cols=",",options="header"]
|=======================================================================
|Attribute |Description

|keystore-password |The password for the truststore

|keystore-path |The path of the truststore

|keystore-relative-to |The name of another previously named path, or of
one of the standard paths provided by the system. If
keystore-relative-to is provided, the value of the keystore-path
attribute is treated as relative to the path specified by this attribute
|=======================================================================

[[tls-with-client-certificate-authentication.]]
===== TLS with Client certificate authentication.

If you have set up the syslog server to require client certificate
authentication, when creating your handler you will also need to set up
a client certificate store containing the certificate to be presented to
the syslog server. The address of the client certificate store resource
is
`/core-service=management/access=audit/syslog-handler=*/protocol=tls/authentication=client-certificate-store`
and its attributes are:

[cols=",",options="header"]
|=======================================================================
|Attribute |Description

|keystore-password |The password for the keystore

|key-password |The password for the keystore key

|keystore-path |The path of the keystore

|keystore-relative-to |The name of another previously named path, or of
one of the standard paths provided by the system. If
keystore-relative-to is provided, the value of the keystore-path
attribute is treated as relative to the path specified by this attribute
|=======================================================================

[[logger-configuration]]
== Logger configuration

The final part that needs configuring is the logger for the management
operations. This references one or more handlers and is configured at
`/core-service=management/access=audit/logger=audit-log`. The attributes
for this resource are:

[cols=",",options="header"]
|=======================================================================
|Attribute |Description

|enabled |true to enable logging of the management operations

|log-boot |true to log the management operations when booting the
server, false otherwise

|log-read-only |If true all operations will be audit logged, if false
only operations that change the model will be logged
|=======================================================================

Then which handlers are used to log the management operations are
configured as `handler=*` children of the logger.

[[domain-mode-host-specific-configuration]]
== Domain Mode (host specific configuration)

In domain mode audit logging is configured for each host in its
`host.xml` file. This means that when connecting to the DC, the
configuration of the audit logging is under the host's entry, e.g. here
is the default configuration:

[source,options="nowrap"]
----
[domain@localhost:9990 /] /host=master/core-service=management/access=audit:read-resource(recursive=true)
{
    "outcome" => "success",
    "result" => {
        "file-handler" => {
            "host-file" => {
                "formatter" => "json-formatter",
                "max-failure-count" => 10,
                "path" => "audit-log.log",
                "relative-to" => "jboss.domain.data.dir"
            },
            "server-file" => {
                "formatter" => "json-formatter",
                "max-failure-count" => 10,
                "path" => "audit-log.log",
                "relative-to" => "jboss.server.data.dir"
            }
        },
        "json-formatter" => {"json-formatter" => {
            "compact" => false,
            "date-format" => "yyyy-MM-dd HH:mm:ss",
            "date-separator" => " - ",
            "escape-control-characters" => false,
            "escape-new-line" => false,
            "include-date" => true
        }},
        "logger" => {"audit-log" => {
            "enabled" => false,
            "log-boot" => true,
            "log-read-only" => false,
            "handler" => {"host-file" => {}}
        }},
        "server-logger" => {"audit-log" => {
            "enabled" => false,
            "log-boot" => true,
            "log-read-only" => false,
            "handler" => {"server-file" => {}}
        }},
        "syslog-handler" => undefined
    }
}
----

We now have two file handlers, one called `host-file` used to configure
the file to log management operations on the host, and one called
`server-file` used to log management operations executed on the servers.
Then `logger=audit-log` is used to configure the logger for the host
controller, referencing the `host-file` handler.
`server-logger=audit-log` is used to configure the logger for the
managed servers, referencing the `server-file` handler. The attributes
for `server-logger=audit-log` are the same as for
`server-logger=audit-log` in the previous section. Having the host
controller and server loggers configured independently means we can
control audit logging for managed servers and the host controller
independently.
