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    1 ############################
    2 # GRAYLOG CONFIGURATION FILE
    3 ############################
    4 #
    5 # This is the Graylog configuration file. The file has to use ISO 8859-1/Latin-1 character encoding.
    6 # Characters that cannot be directly represented in this encoding can be written using Unicode escapes
    7 # as defined in https://docs.oracle.com/javase/specs/jls/se8/html/jls-3.html#jls-3.3, using the \u prefix.
    8 # For example, \u002c.
    9 # 
   10 # * Entries are generally expected to be a single line of the form, one of the following:
   11 #
   12 # propertyName=propertyValue
   13 # propertyName:propertyValue
   14 #
   15 # * White space that appears between the property name and property value is ignored,
   16 #   so the following are equivalent:
   17 # 
   18 # name=Stephen
   19 # name = Stephen
   20 #
   21 # * White space at the beginning of the line is also ignored.
   22 #
   23 # * Lines that start with the comment characters ! or # are ignored. Blank lines are also ignored.
   24 #
   25 # * The property value is generally terminated by the end of the line. White space following the
   26 #   property value is not ignored, and is treated as part of the property value.
   27 #
   28 # * A property value can span several lines if each line is terminated by a backslash (‘\’) character.
   29 #   For example:
   30 #
   31 # targetCities=\
   32 #         Detroit,\
   33 #         Chicago,\
   34 #         Los Angeles
   35 #
   36 #   This is equivalent to targetCities=Detroit,Chicago,Los Angeles (white space at the beginning of lines is ignored).
   37 # 
   38 # * The characters newline, carriage return, and tab can be inserted with characters \n, \r, and \t, respectively.
   39 # 
   40 # * The backslash character must be escaped as a double backslash. For example:
   41 # 
   42 # path=c:\\docs\\doc1
   43 #
   44 
   45 # If you are running more than one instances of Graylog server you have to select one of these
   46 # instances as master. The master will perform some periodical tasks that non-masters won't perform.
   47 is_master = true
   48 
   49 # The auto-generated node ID will be stored in this file and read after restarts. It is a good idea
   50 # to use an absolute file path here if you are starting Graylog server from init scripts or similar.
   51 node_id_file = /etc/graylog/server/node-id
   52 
   53 # You MUST set a secret to secure/pepper the stored user passwords here. Use at least 64 characters.
   54 # Generate one by using for example: pwgen -N 1 -s 96
   55 # ATTENTION: This value must be the same on all Graylog nodes in the cluster.
   56 # Changing this value after installation will render all user sessions and encrypted values in the database invalid. (e.g. encrypted access tokens)
   57 password_secret =
   58 
   59 # The default root user is named 'admin'
   60 #root_username = admin
   61 
   62 # You MUST specify a hash password for the root user (which you only need to initially set up the
   63 # system and in case you lose connectivity to your authentication backend)
   64 # This password cannot be changed using the API or via the web interface. If you need to change it,
   65 # modify it in this file.
   66 # Create one by using for example: echo -n yourpassword | shasum -a 256
   67 # and put the resulting hash value into the following line
   68 root_password_sha2 =
   69 
   70 # The email address of the root user.
   71 # Default is empty
   72 #root_email = ""
   73 
   74 # The time zone setting of the root user. See http://www.joda.org/joda-time/timezones.html for a list of valid time zones.
   75 # Default is UTC
   76 #root_timezone = UTC
   77 
   78 # Set the bin directory here (relative or absolute)
   79 # This directory contains binaries that are used by the Graylog server.
   80 # Default: bin
   81 bin_dir = bin
   82 
   83 # Set the data directory here (relative or absolute)
   84 # This directory is used to store Graylog server state.
   85 # Default: data
   86 data_dir = data
   87 
   88 # Set plugin directory here (relative or absolute)
   89 plugin_dir = plugin
   90 
   91 ###############
   92 # HTTP settings
   93 ###############
   94 
   95 #### HTTP bind address
   96 #
   97 # The network interface used by the Graylog HTTP interface.
   98 #
   99 # This network interface must be accessible by all Graylog nodes in the cluster and by all clients
  100 # using the Graylog web interface.
  101 #
  102 # If the port is omitted, Graylog will use port 9000 by default.
  103 #
  104 # Default: 127.0.0.1:9000
  105 #http_bind_address = 127.0.0.1:9000
  106 #http_bind_address = [2001:db8::1]:9000
  107 
  108 #### HTTP publish URI
  109 #
  110 # The HTTP URI of this Graylog node which is used to communicate with the other Graylog nodes in the cluster and by all
  111 # clients using the Graylog web interface.
  112 #
  113 # The URI will be published in the cluster discovery APIs, so that other Graylog nodes will be able to find and connect to this Graylog node.
  114 #
  115 # This configuration setting has to be used if this Graylog node is available on another network interface than $http_bind_address,
  116 # for example if the machine has multiple network interfaces or is behind a NAT gateway.
  117 #
  118 # If $http_bind_address contains a wildcard IPv4 address (0.0.0.0), the first non-loopback IPv4 address of this machine will be used.
  119 # This configuration setting *must not* contain a wildcard address!
  120 #
  121 # Default: http://$http_bind_address/
  122 #http_publish_uri = http://192.168.1.1:9000/
  123 
  124 #### External Graylog URI
  125 #
  126 # The public URI of Graylog which will be used by the Graylog web interface to communicate with the Graylog REST API.
  127 #
  128 # The external Graylog URI usually has to be specified, if Graylog is running behind a reverse proxy or load-balancer
  129 # and it will be used to generate URLs addressing entities in the Graylog REST API (see $http_bind_address).
  130 #
  131 # When using Graylog Collector, this URI will be used to receive heartbeat messages and must be accessible for all collectors.
  132 #
  133 # This setting can be overriden on a per-request basis with the "X-Graylog-Server-URL" HTTP request header.
  134 #
  135 # Default: $http_publish_uri
  136 #http_external_uri =
  137 
  138 #### Enable CORS headers for HTTP interface
  139 #
  140 # This is necessary for JS-clients accessing the server directly.
  141 # If these are disabled, modern browsers will not be able to retrieve resources from the server.
  142 # This is enabled by default. Uncomment the next line to disable it.
  143 #http_enable_cors = false
  144 
  145 #### Enable GZIP support for HTTP interface
  146 #
  147 # This compresses API responses and therefore helps to reduce
  148 # overall round trip times. This is enabled by default. Uncomment the next line to disable it.
  149 #http_enable_gzip = false
  150 
  151 # The maximum size of the HTTP request headers in bytes.
  152 #http_max_header_size = 8192
  153 
  154 # The size of the thread pool used exclusively for serving the HTTP interface.
  155 #http_thread_pool_size = 16
  156 
  157 ################
  158 # HTTPS settings
  159 ################
  160 
  161 #### Enable HTTPS support for the HTTP interface
  162 #
  163 # This secures the communication with the HTTP interface with TLS to prevent request forgery and eavesdropping.
  164 #
  165 # Default: false
  166 #http_enable_tls = true
  167 
  168 # The X.509 certificate chain file in PEM format to use for securing the HTTP interface.
  169 #http_tls_cert_file = /path/to/graylog.crt
  170 
  171 # The PKCS#8 private key file in PEM format to use for securing the HTTP interface.
  172 #http_tls_key_file = /path/to/graylog.key
  173 
  174 # The password to unlock the private key used for securing the HTTP interface.
  175 #http_tls_key_password = secret
  176 
  177 
  178 # Comma separated list of trusted proxies that are allowed to set the client address with X-Forwarded-For
  179 # header. May be subnets, or hosts.
  180 #trusted_proxies = 127.0.0.1/32, 0:0:0:0:0:0:0:1/128
  181 
  182 # List of Elasticsearch hosts Graylog should connect to.
  183 # Need to be specified as a comma-separated list of valid URIs for the http ports of your elasticsearch nodes.
  184 # If one or more of your elasticsearch hosts require authentication, include the credentials in each node URI that
  185 # requires authentication.
  186 #
  187 # Default: http://127.0.0.1:9200
  188 #elasticsearch_hosts = http://node1:9200,http://user:password@node2:19200
  189 
  190 # Maximum amount of time to wait for successfull connection to Elasticsearch HTTP port.
  191 #
  192 # Default: 10 Seconds
  193 #elasticsearch_connect_timeout = 10s
  194 
  195 # Maximum amount of time to wait for reading back a response from an Elasticsearch server.
  196 #
  197 # Default: 60 seconds
  198 #elasticsearch_socket_timeout = 60s
  199 
  200 # Maximum idle time for an Elasticsearch connection. If this is exceeded, this connection will
  201 # be tore down.
  202 #
  203 # Default: inf
  204 #elasticsearch_idle_timeout = -1s
  205 
  206 # Maximum number of total connections to Elasticsearch.
  207 #
  208 # Default: 200
  209 #elasticsearch_max_total_connections = 200
  210 
  211 # Maximum number of total connections per Elasticsearch route (normally this means per
  212 # elasticsearch server).
  213 #
  214 # Default: 20
  215 #elasticsearch_max_total_connections_per_route = 20
  216 
  217 # Maximum number of times Graylog will retry failed requests to Elasticsearch.
  218 #
  219 # Default: 2
  220 #elasticsearch_max_retries = 2
  221 
  222 # Enable automatic Elasticsearch node discovery through Nodes Info,
  223 # see https://www.elastic.co/guide/en/elasticsearch/reference/5.4/cluster-nodes-info.html
  224 #
  225 # WARNING: Automatic node discovery does not work if Elasticsearch requires authentication, e. g. with Shield.
  226 #
  227 # Default: false
  228 #elasticsearch_discovery_enabled = true
  229 
  230 # Filter for including/excluding Elasticsearch nodes in discovery according to their custom attributes,
  231 # see https://www.elastic.co/guide/en/elasticsearch/reference/5.4/cluster.html#cluster-nodes
  232 #
  233 # Default: empty
  234 #elasticsearch_discovery_filter = rack:42
  235 
  236 # Frequency of the Elasticsearch node discovery.
  237 #
  238 # Default: 30s
  239 # elasticsearch_discovery_frequency = 30s
  240 
  241 # Set the default scheme when connecting to Elasticsearch discovered nodes
  242 #
  243 # Default: http (available options: http, https)
  244 #elasticsearch_discovery_default_scheme = http
  245 
  246 # Enable payload compression for Elasticsearch requests.
  247 #
  248 # Default: false
  249 #elasticsearch_compression_enabled = true
  250 
  251 # Enable use of "Expect: 100-continue" Header for Elasticsearch index requests.
  252 # If this is disabled, Graylog cannot properly handle HTTP 413 Request Entity Too Large errors.
  253 #
  254 # Default: true
  255 #elasticsearch_use_expect_continue = true
  256 
  257 # Graylog will use multiple indices to store documents in. You can configured the strategy it uses to determine
  258 # when to rotate the currently active write index.
  259 # It supports multiple rotation strategies:
  260 #   - "count" of messages per index, use elasticsearch_max_docs_per_index below to configure
  261 #   - "size" per index, use elasticsearch_max_size_per_index below to configure
  262 # valid values are "count", "size" and "time", default is "count"
  263 #
  264 # ATTENTION: These settings have been moved to the database in 2.0. When you upgrade, make sure to set these
  265 #            to your previous 1.x settings so they will be migrated to the database!
  266 #            This configuration setting is only used on the first start of Graylog. After that,
  267 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  268 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  269 rotation_strategy = count
  270 
  271 # (Approximate) maximum number of documents in an Elasticsearch index before a new index
  272 # is being created, also see no_retention and elasticsearch_max_number_of_indices.
  273 # Configure this if you used 'rotation_strategy = count' above.
  274 #
  275 # ATTENTION: These settings have been moved to the database in 2.0. When you upgrade, make sure to set these
  276 #            to your previous 1.x settings so they will be migrated to the database!
  277 #            This configuration setting is only used on the first start of Graylog. After that,
  278 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  279 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  280 elasticsearch_max_docs_per_index = 20000000
  281 
  282 # (Approximate) maximum size in bytes per Elasticsearch index on disk before a new index is being created, also see
  283 # no_retention and elasticsearch_max_number_of_indices. Default is 1GB.
  284 # Configure this if you used 'rotation_strategy = size' above.
  285 #
  286 # ATTENTION: These settings have been moved to the database in 2.0. When you upgrade, make sure to set these
  287 #            to your previous 1.x settings so they will be migrated to the database!
  288 #            This configuration setting is only used on the first start of Graylog. After that,
  289 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  290 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  291 #elasticsearch_max_size_per_index = 1073741824
  292 
  293 # (Approximate) maximum time before a new Elasticsearch index is being created, also see
  294 # no_retention and elasticsearch_max_number_of_indices. Default is 1 day.
  295 # Configure this if you used 'rotation_strategy = time' above.
  296 # Please note that this rotation period does not look at the time specified in the received messages, but is
  297 # using the real clock value to decide when to rotate the index!
  298 # Specify the time using a duration and a suffix indicating which unit you want:
  299 #  1w  = 1 week
  300 #  1d  = 1 day
  301 #  12h = 12 hours
  302 # Permitted suffixes are: d for day, h for hour, m for minute, s for second.
  303 #
  304 # ATTENTION: These settings have been moved to the database in 2.0. When you upgrade, make sure to set these
  305 #            to your previous 1.x settings so they will be migrated to the database!
  306 #            This configuration setting is only used on the first start of Graylog. After that,
  307 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  308 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  309 #elasticsearch_max_time_per_index = 1d
  310 
  311 # Disable checking the version of Elasticsearch for being compatible with this Graylog release.
  312 # WARNING: Using Graylog with unsupported and untested versions of Elasticsearch may lead to data loss!
  313 #elasticsearch_disable_version_check = true
  314 
  315 # Disable message retention on this node, i. e. disable Elasticsearch index rotation.
  316 #no_retention = false
  317 
  318 # How many indices do you want to keep?
  319 #
  320 # ATTENTION: These settings have been moved to the database in 2.0. When you upgrade, make sure to set these
  321 #            to your previous 1.x settings so they will be migrated to the database!
  322 #            This configuration setting is only used on the first start of Graylog. After that,
  323 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  324 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  325 elasticsearch_max_number_of_indices = 20
  326 
  327 # Decide what happens with the oldest indices when the maximum number of indices is reached.
  328 # The following strategies are availble:
  329 #   - delete # Deletes the index completely (Default)
  330 #   - close # Closes the index and hides it from the system. Can be re-opened later.
  331 #
  332 # ATTENTION: These settings have been moved to the database in 2.0. When you upgrade, make sure to set these
  333 #            to your previous 1.x settings so they will be migrated to the database!
  334 #            This configuration setting is only used on the first start of Graylog. After that,
  335 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  336 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  337 retention_strategy = delete
  338 
  339 # How many Elasticsearch shards and replicas should be used per index? Note that this only applies to newly created indices.
  340 # ATTENTION: These settings have been moved to the database in Graylog 2.2.0. When you upgrade, make sure to set these
  341 #            to your previous settings so they will be migrated to the database!
  342 #            This configuration setting is only used on the first start of Graylog. After that,
  343 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  344 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  345 elasticsearch_shards = 4
  346 elasticsearch_replicas = 0
  347 
  348 # Prefix for all Elasticsearch indices and index aliases managed by Graylog.
  349 #
  350 # ATTENTION: These settings have been moved to the database in Graylog 2.2.0. When you upgrade, make sure to set these
  351 #            to your previous settings so they will be migrated to the database!
  352 #            This configuration setting is only used on the first start of Graylog. After that,
  353 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  354 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  355 elasticsearch_index_prefix = graylog
  356 
  357 # Name of the Elasticsearch index template used by Graylog to apply the mandatory index mapping.
  358 # Default: graylog-internal
  359 #
  360 # ATTENTION: These settings have been moved to the database in Graylog 2.2.0. When you upgrade, make sure to set these
  361 #            to your previous settings so they will be migrated to the database!
  362 #            This configuration setting is only used on the first start of Graylog. After that,
  363 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  364 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  365 #elasticsearch_template_name = graylog-internal
  366 
  367 # Do you want to allow searches with leading wildcards? This can be extremely resource hungry and should only
  368 # be enabled with care. See also: http://docs.graylog.org/en/2.1/pages/queries.html
  369 allow_leading_wildcard_searches = false
  370 
  371 # Do you want to allow searches to be highlighted? Depending on the size of your messages this can be memory hungry and
  372 # should only be enabled after making sure your Elasticsearch cluster has enough memory.
  373 allow_highlighting = false
  374 
  375 # Analyzer (tokenizer) to use for message and full_message field. The "standard" filter usually is a good idea.
  376 # All supported analyzers are: standard, simple, whitespace, stop, keyword, pattern, language, snowball, custom
  377 # Elasticsearch documentation: https://www.elastic.co/guide/en/elasticsearch/reference/2.3/analysis.html
  378 # Note that this setting only takes effect on newly created indices.
  379 #
  380 # ATTENTION: These settings have been moved to the database in Graylog 2.2.0. When you upgrade, make sure to set these
  381 #            to your previous settings so they will be migrated to the database!
  382 #            This configuration setting is only used on the first start of Graylog. After that,
  383 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  384 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  385 elasticsearch_analyzer = standard
  386 
  387 # Global request timeout for Elasticsearch requests (e. g. during search, index creation, or index time-range
  388 # calculations) based on a best-effort to restrict the runtime of Elasticsearch operations.
  389 # Default: 1m
  390 #elasticsearch_request_timeout = 1m
  391 
  392 # Global timeout for index optimization (force merge) requests.
  393 # Default: 1h
  394 #elasticsearch_index_optimization_timeout = 1h
  395 
  396 # Maximum number of concurrently running index optimization (force merge) jobs.
  397 # If you are using lots of different index sets, you might want to increase that number.
  398 # Default: 20
  399 #elasticsearch_index_optimization_jobs = 20
  400 
  401 # Time interval for index range information cleanups. This setting defines how often stale index range information
  402 # is being purged from the database.
  403 # Default: 1h
  404 #index_ranges_cleanup_interval = 1h
  405 
  406 # Time interval for the job that runs index field type maintenance tasks like cleaning up stale entries. This doesn't
  407 # need to run very often.
  408 # Default: 1h
  409 #index_field_type_periodical_interval = 1h
  410 
  411 # Batch size for the Elasticsearch output. This is the maximum (!) number of messages the Elasticsearch output
  412 # module will get at once and write to Elasticsearch in a batch call. If the configured batch size has not been
  413 # reached within output_flush_interval seconds, everything that is available will be flushed at once. Remember
  414 # that every outputbuffer processor manages its own batch and performs its own batch write calls.
  415 # ("outputbuffer_processors" variable)
  416 output_batch_size = 500
  417 
  418 # Flush interval (in seconds) for the Elasticsearch output. This is the maximum amount of time between two
  419 # batches of messages written to Elasticsearch. It is only effective at all if your minimum number of messages
  420 # for this time period is less than output_batch_size * outputbuffer_processors.
  421 output_flush_interval = 1
  422 
  423 # As stream outputs are loaded only on demand, an output which is failing to initialize will be tried over and
  424 # over again. To prevent this, the following configuration options define after how many faults an output will
  425 # not be tried again for an also configurable amount of seconds.
  426 output_fault_count_threshold = 5
  427 output_fault_penalty_seconds = 30
  428 
  429 # The number of parallel running processors.
  430 # Raise this number if your buffers are filling up.
  431 processbuffer_processors = 5
  432 outputbuffer_processors = 3
  433 
  434 # The following settings (outputbuffer_processor_*) configure the thread pools backing each output buffer processor.
  435 # See https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadPoolExecutor.html for technical details
  436 
  437 # When the number of threads is greater than the core (see outputbuffer_processor_threads_core_pool_size),
  438 # this is the maximum time in milliseconds that excess idle threads will wait for new tasks before terminating.
  439 # Default: 5000
  440 #outputbuffer_processor_keep_alive_time = 5000
  441 
  442 # The number of threads to keep in the pool, even if they are idle, unless allowCoreThreadTimeOut is set
  443 # Default: 3
  444 #outputbuffer_processor_threads_core_pool_size = 3
  445 
  446 # The maximum number of threads to allow in the pool
  447 # Default: 30
  448 #outputbuffer_processor_threads_max_pool_size = 30
  449 
  450 # UDP receive buffer size for all message inputs (e. g. SyslogUDPInput).
  451 #udp_recvbuffer_sizes = 1048576
  452 
  453 # Wait strategy describing how buffer processors wait on a cursor sequence. (default: sleeping)
  454 # Possible types:
  455 #  - yielding
  456 #     Compromise between performance and CPU usage.
  457 #  - sleeping
  458 #     Compromise between performance and CPU usage. Latency spikes can occur after quiet periods.
  459 #  - blocking
  460 #     High throughput, low latency, higher CPU usage.
  461 #  - busy_spinning
  462 #     Avoids syscalls which could introduce latency jitter. Best when threads can be bound to specific CPU cores.
  463 processor_wait_strategy = blocking
  464 
  465 # Size of internal ring buffers. Raise this if raising outputbuffer_processors does not help anymore.
  466 # For optimum performance your LogMessage objects in the ring buffer should fit in your CPU L3 cache.
  467 # Must be a power of 2. (512, 1024, 2048, ...)
  468 ring_size = 65536
  469 
  470 inputbuffer_ring_size = 65536
  471 inputbuffer_processors = 2
  472 inputbuffer_wait_strategy = blocking
  473 
  474 # Enable the disk based message journal.
  475 message_journal_enabled = true
  476 
  477 # The directory which will be used to store the message journal. The directory must be exclusively used by Graylog and
  478 # must not contain any other files than the ones created by Graylog itself.
  479 #
  480 # ATTENTION:
  481 #   If you create a seperate partition for the journal files and use a file system creating directories like 'lost+found'
  482 #   in the root directory, you need to create a sub directory for your journal.
  483 #   Otherwise Graylog will log an error message that the journal is corrupt and Graylog will not start.
  484 message_journal_dir = data/journal
  485 
  486 # Journal hold messages before they could be written to Elasticsearch.
  487 # For a maximum of 12 hours or 5 GB whichever happens first.
  488 # During normal operation the journal will be smaller.
  489 #message_journal_max_age = 12h
  490 #message_journal_max_size = 5gb
  491 
  492 #message_journal_flush_age = 1m
  493 #message_journal_flush_interval = 1000000
  494 #message_journal_segment_age = 1h
  495 #message_journal_segment_size = 100mb
  496 
  497 # Number of threads used exclusively for dispatching internal events. Default is 2.
  498 #async_eventbus_processors = 2
  499 
  500 # How many seconds to wait between marking node as DEAD for possible load balancers and starting the actual
  501 # shutdown process. Set to 0 if you have no status checking load balancers in front.
  502 lb_recognition_period_seconds = 3
  503 
  504 # Journal usage percentage that triggers requesting throttling for this server node from load balancers. The feature is
  505 # disabled if not set.
  506 #lb_throttle_threshold_percentage = 95
  507 
  508 # Every message is matched against the configured streams and it can happen that a stream contains rules which
  509 # take an unusual amount of time to run, for example if its using regular expressions that perform excessive backtracking.
  510 # This will impact the processing of the entire server. To keep such misbehaving stream rules from impacting other
  511 # streams, Graylog limits the execution time for each stream.
  512 # The default values are noted below, the timeout is in milliseconds.
  513 # If the stream matching for one stream took longer than the timeout value, and this happened more than "max_faults" times
  514 # that stream is disabled and a notification is shown in the web interface.
  515 #stream_processing_timeout = 2000
  516 #stream_processing_max_faults = 3
  517 
  518 # Since 0.21 the Graylog server supports pluggable output modules. This means a single message can be written to multiple
  519 # outputs. The next setting defines the timeout for a single output module, including the default output module where all
  520 # messages end up.
  521 #
  522 # Time in milliseconds to wait for all message outputs to finish writing a single message.
  523 #output_module_timeout = 10000
  524 
  525 # Time in milliseconds after which a detected stale master node is being rechecked on startup.
  526 #stale_master_timeout = 2000
  527 
  528 # Time in milliseconds which Graylog is waiting for all threads to stop on shutdown.
  529 #shutdown_timeout = 30000
  530 
  531 # MongoDB connection string
  532 # See https://docs.mongodb.com/manual/reference/connection-string/ for details
  533 mongodb_uri = mongodb://localhost/graylog
  534 
  535 # Authenticate against the MongoDB server
  536 # '+'-signs in the username or password need to be replaced by '%2B'
  537 #mongodb_uri = mongodb://grayloguser:secret@localhost:27017/graylog
  538 
  539 # Use a replica set instead of a single host
  540 #mongodb_uri = mongodb://grayloguser:secret@localhost:27017,localhost:27018,localhost:27019/graylog?replicaSet=rs01
  541 
  542 # DNS Seedlist https://docs.mongodb.com/manual/reference/connection-string/#dns-seedlist-connection-format
  543 #mongodb_uri = mongodb+srv://server.example.org/graylog
  544 
  545 # Increase this value according to the maximum connections your MongoDB server can handle from a single client
  546 # if you encounter MongoDB connection problems.
  547 mongodb_max_connections = 1000
  548 
  549 # Number of threads allowed to be blocked by MongoDB connections multiplier. Default: 5
  550 # If mongodb_max_connections is 100, and mongodb_threads_allowed_to_block_multiplier is 5,
  551 # then 500 threads can block. More than that and an exception will be thrown.
  552 # http://api.mongodb.com/java/current/com/mongodb/MongoOptions.html#threadsAllowedToBlockForConnectionMultiplier
  553 mongodb_threads_allowed_to_block_multiplier = 5
  554 
  555 
  556 # Email transport
  557 #transport_email_enabled = false
  558 #transport_email_hostname = mail.example.com
  559 #transport_email_port = 587
  560 #transport_email_use_auth = true
  561 #transport_email_auth_username = you@example.com
  562 #transport_email_auth_password = secret
  563 #transport_email_subject_prefix = [graylog]
  564 #transport_email_from_email = graylog@example.com
  565 
  566 # Encryption settings
  567 #
  568 # ATTENTION:
  569 #    Using SMTP with STARTTLS *and* SMTPS at the same time is *not* possible.
  570 
  571 # Use SMTP with STARTTLS, see https://en.wikipedia.org/wiki/Opportunistic_TLS
  572 #transport_email_use_tls = true
  573 
  574 # Use SMTP over SSL (SMTPS), see https://en.wikipedia.org/wiki/SMTPS
  575 # This is deprecated on most SMTP services!
  576 #transport_email_use_ssl = false
  577 
  578 
  579 # Specify and uncomment this if you want to include links to the stream in your stream alert mails.
  580 # This should define the fully qualified base url to your web interface exactly the same way as it is accessed by your users.
  581 #transport_email_web_interface_url = https://graylog.example.com
  582 
  583 # The default connect timeout for outgoing HTTP connections.
  584 # Values must be a positive duration (and between 1 and 2147483647 when converted to milliseconds).
  585 # Default: 5s
  586 #http_connect_timeout = 5s
  587 
  588 # The default read timeout for outgoing HTTP connections.
  589 # Values must be a positive duration (and between 1 and 2147483647 when converted to milliseconds).
  590 # Default: 10s
  591 #http_read_timeout = 10s
  592 
  593 # The default write timeout for outgoing HTTP connections.
  594 # Values must be a positive duration (and between 1 and 2147483647 when converted to milliseconds).
  595 # Default: 10s
  596 #http_write_timeout = 10s
  597 
  598 # HTTP proxy for outgoing HTTP connections
  599 # ATTENTION: If you configure a proxy, make sure to also configure the "http_non_proxy_hosts" option so internal
  600 #            HTTP connections with other nodes does not go through the proxy.
  601 # Examples:
  602 #   - http://proxy.example.com:8123
  603 #   - http://username:password@proxy.example.com:8123
  604 #http_proxy_uri =
  605 
  606 # A list of hosts that should be reached directly, bypassing the configured proxy server.
  607 # This is a list of patterns separated by ",". The patterns may start or end with a "*" for wildcards.
  608 # Any host matching one of these patterns will be reached through a direct connection instead of through a proxy.
  609 # Examples:
  610 #   - localhost,127.0.0.1
  611 #   - 10.0.*,*.example.com
  612 #http_non_proxy_hosts =
  613 
  614 # Disable the optimization of Elasticsearch indices after index cycling. This may take some load from Elasticsearch
  615 # on heavily used systems with large indices, but it will decrease search performance. The default is to optimize
  616 # cycled indices.
  617 #
  618 # ATTENTION: These settings have been moved to the database in Graylog 2.2.0. When you upgrade, make sure to set these
  619 #            to your previous settings so they will be migrated to the database!
  620 #            This configuration setting is only used on the first start of Graylog. After that,
  621 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  622 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  623 #disable_index_optimization = true
  624 
  625 # Optimize the index down to <= index_optimization_max_num_segments. A higher number may take some load from Elasticsearch
  626 # on heavily used systems with large indices, but it will decrease search performance. The default is 1.
  627 #
  628 # ATTENTION: These settings have been moved to the database in Graylog 2.2.0. When you upgrade, make sure to set these
  629 #            to your previous settings so they will be migrated to the database!
  630 #            This configuration setting is only used on the first start of Graylog. After that,
  631 #            index related settings can be changed in the Graylog web interface on the 'System / Indices' page.
  632 #            Also see http://docs.graylog.org/en/2.3/pages/configuration/index_model.html#index-set-configuration.
  633 #index_optimization_max_num_segments = 1
  634 
  635 # The threshold of the garbage collection runs. If GC runs take longer than this threshold, a system notification
  636 # will be generated to warn the administrator about possible problems with the system. Default is 1 second.
  637 #gc_warning_threshold = 1s
  638 
  639 # Connection timeout for a configured LDAP server (e. g. ActiveDirectory) in milliseconds.
  640 #ldap_connection_timeout = 2000
  641 
  642 # Disable the use of SIGAR for collecting system stats
  643 #disable_sigar = false
  644 
  645 # The default cache time for dashboard widgets. (Default: 10 seconds, minimum: 1 second)
  646 #dashboard_widget_default_cache_time = 10s
  647 
  648 # For some cluster-related REST requests, the node must query all other nodes in the cluster. This is the maximum number
  649 # of threads available for this. Increase it, if '/cluster/*' requests take long to complete.
  650 # Should be http_thread_pool_size * average_cluster_size if you have a high number of concurrent users.
  651 proxied_requests_thread_pool_size = 32
  652 
  653 # The server is writing processing status information to the database on a regular basis. This setting controls how
  654 # often the data is written to the database.
  655 # Default: 1s (cannot be less than 1s)
  656 #processing_status_persist_interval = 1s
  657 
  658 # Configures the threshold for detecting outdated processing status records. Any records that haven't been updated
  659 # in the configured threshold will be ignored.
  660 # Default: 1m (one minute)
  661 #processing_status_update_threshold = 1m
  662 
  663 # Configures the journal write rate threshold for selecting processing status records. Any records that have a lower
  664 # one minute rate than the configured value might be ignored. (dependent on number of messages in the journal)
  665 # Default: 1
  666 #processing_status_journal_write_rate_threshold = 1
  667 
  668 # Configures the prefix used for graylog event indices
  669 # Default: gl-events
  670 #default_events_index_prefix = gl-events
  671 
  672 # Configures the prefix used for graylog system event indices
  673 # Default: gl-system-events
  674 #default_system_events_index_prefix = gl-system-events
  675 
  676 # Automatically load content packs in "content_packs_dir" on the first start of Graylog.
  677 #content_packs_loader_enabled = false
  678 
  679 # The directory which contains content packs which should be loaded on the first start of Graylog.
  680 #content_packs_dir = data/contentpacks
  681 
  682 # A comma-separated list of content packs (files in "content_packs_dir") which should be applied on
  683 # the first start of Graylog.
  684 # Default: empty
  685 #content_packs_auto_install = grok-patterns.json
  686 
  687 # The allowed TLS protocols for system wide TLS enabled servers. (e.g. message inputs, http interface)
  688 # Setting this to an empty value, leaves it up to system libraries and the used JDK to chose a default.
  689 # Default: TLSv1.2,TLSv1.3  (might be automatically adjusted to protocols supported by the JDK) 
  690 #enabled_tls_protocols= TLSv1.2,TLSv1.3