beat.yml

######################### APM Server Configuration #########################

################################ APM Server ################################

apm-server:
  # Defines the host and port the server is listening on. Use "unix:/path/to.sock" to listen on a unix domain socket.
  host: "{{ .listen_hostport }}"

  # Maximum permitted size in bytes of a request's header accepted by the server to be processed.
  #max_header_size: 1048576

  # Maximum amount of time to wait for the next incoming request before underlying connection is closed.
  #idle_timeout: 45s

  # Maximum permitted duration for reading an entire request.
  #read_timeout: 30s

  # Maximum permitted duration for writing a response.
  #write_timeout: 30s

  # Maximum duration before releasing resources when shutting down the server.
  #shutdown_timeout: 5s

  # Maximum permitted size in bytes of an event accepted by the server to be processed.
  #max_event_size: 307200

  # Maximum number of new connections to accept simultaneously (0 means unlimited).
  #max_connections: 0

  # If true (default), APM Server captures the IP of the instrumented service
  # or the IP and User Agent of the real user (RUM requests).
  #capture_personal_data: true

  # Enable APM Server Golang expvar support (https://golang.org/pkg/expvar/).
  #expvar:
    #enabled: false

    # Url to expose expvar.
    #url: "/debug/vars"

  # Instrumentation support for the server's HTTP endpoints and event publisher.
  #instrumentation:
    # Set to true to enable instrumentation of the APM Server itself.
    #enabled: false

    # Environment in which the APM Server is running on (eg: staging, production, etc.)
    #environment: ""

    # Remote hosts to report instrumentation results to.
    #hosts:
    #  - http://remote-apm-server:8200

    # API Key for the remote APM Server(s).
    # If api_key is set then secret_token will be ignored.
    #api_key:

    # Secret token for the remote APM Server(s).
    #secret_token:

    # Enable profiling of the server, recording profile samples as events.
    #
    # This feature is experimental.
    #profiling:
      #cpu:
        # Set to true to enable CPU profiling.
        #enabled: false
        #interval: 60s
        #duration: 10s
      #heap:
        # Set to true to enable heap profiling.
        #enabled: false
        #interval: 60s

  # A pipeline is a definition of processors applied to documents when ingesting them to Elasticsearch.
  # Using pipelines involves two steps:
  # (1) registering a pipeline
  # (2) applying a pipeline during data ingestion (see `output.elasticsearch.pipeline`)
  #
  # You can manually register a pipeline, or use this configuration option to ensure
  # the pipeline is loaded and registered at the configured Elasticsearch instances.
  # Find the default pipeline configuration at `ingest/pipeline/definition.json`.
  # Automatic pipeline registration requires the `output.elasticsearch` to be enabled and configured.
  #register.ingest.pipeline:
    # Registers APM pipeline definition in Elasticsearch on APM Server startup. Defaults to true.
    #enabled: true
    # Overwrites existing APM pipeline definition in Elasticsearch. Defaults to false.
    #overwrite: false


  #---------------------------- APM Server - Secure Communication with Agents ----------------------------

  # Enable secure communication between APM agents and the server. By default ssl is disabled.
  #ssl:
    #enabled: false

    # Configure a list of root certificate authorities for verifying client certificates.
    #certificate_authorities: []

    # Path to file containing the certificate for server authentication.
    # Needs to be configured when ssl is enabled.
    #certificate: ''

    # Path to file containing server certificate key.
    # Needs to be configured when ssl is enabled.
    #key: ''

    # Optional configuration options for ssl communication.

    # Passphrase for decrypting the Certificate Key.
    # It is recommended to use the provided keystore instead of entering the passphrase in plain text.
    #key_passphrase: ''

    # List of supported/valid protocol versions. By default TLS versions 1.1 up to 1.2 are enabled.
    #supported_protocols: [TLSv1.1, TLSv1.2]

    # Configure cipher suites to be used for SSL connections.
    #cipher_suites: []

    # Configure curve types for ECDHE based cipher suites.
    #curve_types: []

    # Configure which type of client authentication is supported.
    # Options are `none`, `optional`, and `required`. Default is `optional`.
    #client_authentication: "optional"

    # Configure SSL verification mode. If `none` is configured, all hosts and
    # certificates will be accepted. In this mode, SSL-based connections are
    # susceptible to man-in-the-middle attacks. Use only for testing. Default is `full`.
    #ssl.verification_mode: full

  # The APM Server endpoints can be secured by configuring a secret token or enabling the usage of API keys. Both
  # options can be enabled in parallel, allowing Elastic APM agents to chose whichever mechanism they support.
  # As soon as one of the options is enabled, requests without a valid token are denied by the server. An exception
  # to this are requests to any enabled RUM endpoint. RUM endpoints are generally not secured by any token.
  #
  # Configure authorization via a common `secret_token`. By default it is disabled.
  # Agents include the token in the following format: Authorization: Bearer <secret-token>.
  # It is recommended to use an authorization token in combination with SSL enabled,
  # and save the token in the apm-server keystore.
  #secret_token:

  # Enable API key authorization by setting enabled to true. By default API key support is disabled.
  # Agents include a valid API key in the following format: Authorization: ApiKey <token>.
  # The key must be the base64 encoded representation of the API key's "id:key".
  # This is an experimental feature, use with care.
  #api_key:
    #enabled: false

    # Restrict how many unique API keys are allowed per minute. Should be set to at least the amount of different
    # API keys configured in your monitored services. Every unique API key triggers one request to Elasticsearch.
    #limit: 100

    # API keys need to be fetched from Elasticsearch. If nothing is configured, configuration settings from the
    # output section will be reused.
    # Note that configuration needs to point to a secured Elasticsearch cluster that is able to serve API key requests.
    #elasticsearch:
      #hosts: ["localhost:9200"]

      #protocol: "http"

      # Username and password are only needed for the apm-server apikey sub-command, and they are ignored otherwise
      # See `apm-server apikey --help` for details.
      #username: "elastic"
      #password: "changeme"

      # Optional HTTP Path.
      #path: ""

      # Proxy server url.
      #proxy_url: ""
      #proxy_disable: false

      # Configure http request timeout before failing an request to Elasticsearch.
      #timeout: 5s

      # Enable custom SSL settings. Set to false to ignore custom SSL settings for secure communication.
      #ssl.enabled: true

      # Optional SSL configuration options. SSL is off by default, change the `protocol` option if you want to enable `https`.
      # Configure SSL verification mode. If `none` is configured, all server hosts
      # and certificates will be accepted. In this mode, SSL based connections are
      # susceptible to man-in-the-middle attacks. Use only for testing. Default is
      # `full`.
      #ssl.verification_mode: full

      # List of supported/valid TLS versions. By default all TLS versions 1.0 up to
      # 1.2 are enabled.
      #ssl.supported_protocols: [TLSv1.0, TLSv1.1, TLSv1.2]

      # List of root certificates for HTTPS server verifications.
      #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

      # Certificate for SSL client authentication.
      #ssl.certificate: "/etc/pki/client/cert.pem"

      # Client Certificate Key
      #ssl.key: "/etc/pki/client/cert.key"

      # Optional passphrase for decrypting the Certificate Key.
      # It is recommended to use the provided keystore instead of entering the passphrase in plain text.
      #ssl.key_passphrase: ''

      # Configure cipher suites to be used for SSL connections.
      #ssl.cipher_suites: []

      # Configure curve types for ECDHE based cipher suites.
      #ssl.curve_types: []

      # Configure what types of renegotiation are supported. Valid options are
      # never, once, and freely. Default is never.
      #ssl.renegotiation: never


  #---------------------------- APM Server - RUM Real User Monitoring ----------------------------

  # Enable Real User Monitoring (RUM) Support. By default RUM is disabled.
  # RUM does not support token based authorization. Enabled RUM endpoints will not require any authorization
  # token configured for other endpoints.
  #rum:
    #enabled: false

    #event_rate:

      # Defines the maximum amount of events allowed to be sent to the APM Server RUM
      # endpoint per IP per second. Defaults to 300.
      #limit: 300

      # An LRU cache is used to keep a rate limit per IP for the most recently seen IPs.
      # This setting defines the number of unique IPs that can be tracked in the cache.
      # Sites with many concurrent clients should consider increasing this limit. Defaults to 1000.
      #lru_size: 1000

    #-- General RUM settings

    # A list of permitted origins for real user monitoring.
    # User-agents will send an origin header that will be validated against this list.
    # An origin is made of a protocol scheme, host and port, without the url path.
    # Allowed origins in this setting can have * to match anything (eg.: http://*.example.com)
    # If an item in the list is a single '*', everything will be allowed.
    #allow_origins : ['*']

    # Regexp to be matched against a stacktrace frame's `file_name` and `abs_path` attributes.
    # If the regexp matches, the stacktrace frame is considered to be a library frame.
    #library_pattern: "node_modules|bower_components|~"

    # Regexp to be matched against a stacktrace frame's `file_name`.
    # If the regexp matches, the stacktrace frame is not used for calculating error groups.
    # The default pattern excludes stacktrace frames that have a filename starting with '/webpack'
    #exclude_from_grouping: "^/webpack"

    # If a source map has previously been uploaded, source mapping is automatically applied.
    # to all error and transaction documents sent to the RUM endpoint.
    #source_mapping:

      # Sourcemapping is enabled by default.
      #enabled: true

      # Source maps are always fetched from Elasticsearch, by default using the output.elasticsearch configuration.
      # A different instance must be configured when using any other output.
      # This setting only affects sourcemap reads - the output determines where sourcemaps are written.
      #elasticsearch:
        # Array of hosts to connect to.
        # Scheme and port can be left out and will be set to the default (`http` and `9200`).
        # In case you specify and additional path, the scheme is required: `http://localhost:9200/path`.
        # IPv6 addresses should always be defined as: `https://[2001:db8::1]:9200`.
        # hosts: ["localhost:9200"]

        # Protocol - either `http` (default) or `https`.
        #protocol: "https"

        # Authentication credentials - either API key or username/password.
        #api_key: "id:api_key"
        #username: "elastic"
        #password: "changeme"

      # The `cache.expiration` determines how long a source map should be cached before fetching it again from Elasticsearch.
      # Note that values configured without a time unit will be interpreted as seconds.
      #cache:
        #expiration: 5m

      # Source maps are stored in a separate index.
      # If the default index pattern for source maps at 'outputs.elasticsearch.indices'
      # is changed, a matching index pattern needs to be specified here.
      #index_pattern: "apm-*-sourcemap*"

  #---------------------------- APM Server - Agent Configuration ----------------------------

  # When using APM agent configuration, information fetched from Kibana will be cached in memory for some time.
  # Specify cache key expiration via this setting. Default is 30 seconds.
  #agent.config.cache.expiration: 30s

  #kibana:
    # For APM Agent configuration in Kibana, enabled must be true.
    #enabled: false

    # Scheme and port can be left out and will be set to the default (`http` and `5601`).
    # In case you specify an additional path, the scheme is required: `http://localhost:5601/path`.
    # IPv6 addresses should always be defined as: `https://[2001:db8::1]:5601`.
    #host: "localhost:5601"

    # Optional protocol and basic auth credentials.
    #protocol: "https"
    #username: "elastic"
    #password: "changeme"

    # Optional HTTP path.
    #path: ""

    # Enable custom SSL settings. Set to false to ignore custom SSL settings for secure communication.
    #ssl.enabled: true

    # Optional SSL configuration options. SSL is off by default, change the `protocol` option if you want to enable `https`.
    # Configure SSL verification mode. If `none` is configured, all server hosts
    # and certificates will be accepted. In this mode, SSL based connections are
    # susceptible to man-in-the-middle attacks. Use only for testing. Default is
    # `full`.
    #ssl.verification_mode: full

    # List of supported/valid TLS versions. By default all TLS versions 1.0 up to
    # 1.2 are enabled.
    #ssl.supported_protocols: [TLSv1.0, TLSv1.1, TLSv1.2]

    # List of root certificates for HTTPS server verifications.
    #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

    # Certificate for SSL client authentication.
    #ssl.certificate: "/etc/pki/client/cert.pem"

    # Client Certificate Key
    #ssl.key: "/etc/pki/client/cert.key"

    # Optional passphrase for decrypting the Certificate Key.
    # It is recommended to use the provided keystore instead of entering the passphrase in plain text.
    #ssl.key_passphrase: ''

    # Configure cipher suites to be used for SSL connections.
    #ssl.cipher_suites: []

    # Configure curve types for ECDHE based cipher suites.
    #ssl.curve_types: []

  #---------------------------- APM Server - ILM Index Lifecycle Management ----------------------------

  #ilm:
    # Supported values are `auto`, `true` and `false`.
    # `true`: Make use of Elasticsearch's Index Lifecycle Management (ILM) for APM indices. If no Elasticsearch output is
    # configured or the configured instance does not support ILM, APM Server cannot apply ILM and must create
    # unmanaged indices instead.
    # `false`: APM Server does not make use of ILM in Elasticsearch.
    # `auto`: If an Elasticsearch output is configured with default index and indices settings, and the configured
    # Elasticsearch instance supports ILM, `auto` will resolve to `true`. Otherwise `auto` will resolve to `false`.
    # Default value is `auto`.
    #enabled: "auto"

    #setup:
      # Only disable setup if you want to set up everything related to ILM on your own.
      # When setup is enabled, the APM Server creates:
      # - aliases and ILM policies if `apm-server.ilm.enabled` resolves to `true`.
      # - An ILM specific template per event type. This is required to map ILM aliases and policies to indices. In case
      # ILM is disabled, the templates will be created without any ILM settings.
      # Be aware that if you turn off setup, you need to manually manage event type specific templates on your own.
      # If you simply want to disable ILM, use the above setting, `apm-server.ilm.enabled`, instead.
      # Defaults to true.
      #enabled: true

      # Configure whether or not existing policies and ILM related templates should be updated. This needs to be
      # set to true when customizing your policies.
      # Defaults to false.
      #overwrite: false

      # Set `require_policy` to `false` when policies are set up outside of APM Server but referenced here.
      # Default value is `true`.
      #require_policy: true

      # The configured event types and policies will be merged with the default setup. You only need to configure
      # the mappings that you want to customize.
      #mapping:
        #- event_type: "error"
        #  policy_name: "apm-rollover-30-days"
        #- event_type: "span"
        #  policy_name: "apm-rollover-30-days"
        #- event_type: "transaction"
        #  policy_name: "apm-rollover-30-days"
        #- event_type: "metric"
        #  policy_name: "apm-rollover-30-days"

      # Configured policies are added to pre-defined default policies.
      # If a policy with the same name as a default policy is configured, the configured policy overwrites the default policy.
      #policies:
        #- name: "apm-rollover-30-days"
          #policy:
            #phases:
              #hot:
                #actions:
                  #rollover:
                    #max_size: "50gb"
                    #max_age: "30d"
                  #set_priority:
                    #priority: 100
              #warm:
                #min_age: "30d"
                #actions:
                  #set_priority:
                    #priority: 50
                  #readonly: {}



  #---------------------------- APM Server - Experimental Jaeger integration ----------------------------

  # When enabling Jaeger integration, APM Server acts as Jaeger collector. It supports jaeger.thrift over HTTP
  # and gRPC. This is an experimental feature, use with care.
  #jaeger:
    #grpc:
      # Set to true to enable the Jaeger gRPC collector service.
      #enabled: false
      # Defines the gRPC host and port the server is listening on.
      # Defaults to the standard Jaeger gRPC collector port 14250.
      #host: "{{ .jaeger_grpc_hostport }}"
    #http:
      # Set to true to enable the Jaeger HTTP collector endpoint.
      #enabled: false
      # Defines the HTTP host and port the server is listening on.
      # Defaults to the standard Jaeger HTTP collector port 14268.
      #host: "{{ .jaeger_http_hostport }}"

#================================= General =================================

# Data is buffered in a memory queue before it is published to the configured output.
# The memory queue will present all available events (up to the outputs
# bulk_max_size) to the output, the moment the output is ready to serve
# another batch of events.
#queue:
  # Queue type by name (default 'mem').
  #mem:
    # Max number of events the queue can buffer.
    #events: 4096

    # Hints the minimum number of events stored in the queue,
    # before providing a batch of events to the outputs.
    # The default value is set to 2048.
    # A value of 0 ensures events are immediately available
    # to be sent to the outputs.
    #flush.min_events: 2048

    # Maximum duration after which events are available to the outputs,
    # if the number of events stored in the queue is < `flush.min_events`.
    #flush.timeout: 1s

# Sets the maximum number of CPUs that can be executing simultaneously. The
# default is the number of logical CPUs available in the system.
#max_procs:

#================================= Template =================================

# A template is used to set the mapping in Elasticsearch.
# By default template loading is enabled and the template is loaded.
# These settings can be adjusted to load your own template or overwrite existing ones.

# Set to false to disable template loading.
#setup.template.enabled: true

# Template name. By default the template name is "apm-%{[observer.version]}"
# The template name and pattern has to be set in case the elasticsearch index pattern is modified.
#setup.template.name: "apm-%{[observer.version]}"

# Template pattern. By default the template pattern is "apm-%{[observer.version]}-*" to apply to the default index settings.
# The first part is the version of apm-server and then -* is used to match all daily indices.
# The template name and pattern has to be set in case the elasticsearch index pattern is modified.
#setup.template.pattern: "apm-%{[observer.version]}-*"

# Path to fields.yml file to generate the template.
#setup.template.fields: "${path.config}/fields.yml"

# Overwrite existing template.
#setup.template.overwrite: false

# Elasticsearch template settings.
#setup.template.settings:

  # A dictionary of settings to place into the settings.index dictionary
  # of the Elasticsearch template. For more details, please check
  # https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping.html
  #index:
    #number_of_shards: 1
    #codec: best_compression
    #number_of_routing_shards: 30
    #mapping.total_fields.limit: 2000

#============================= Elastic Cloud =============================

# These settings simplify using APM Server with the Elastic Cloud (https://cloud.elastic.co/).

# The cloud.id setting overwrites the `output.elasticsearch.hosts` option.
# You can find the `cloud.id` in the Elastic Cloud web UI.
#cloud.id:

# The cloud.auth setting overwrites the `output.elasticsearch.username` and
# `output.elasticsearch.password` settings. The format is `<user>:<pass>`.
#cloud.auth:

#================================ Outputs =================================

# Configure the output to use when sending the data collected by apm-server.

#-------------------------- Elasticsearch output --------------------------
output.elasticsearch:
  # Array of hosts to connect to.
  # Scheme and port can be left out and will be set to the default (`http` and `9200`).
  # In case you specify and additional path, the scheme is required: `http://localhost:9200/path`.
  # IPv6 addresses should always be defined as: `https://[2001:db8::1]:9200`.
  hosts: ["{{ .elasticsearch_hostport }}"]

  # Boolean flag to enable or disable the output module.
  #enabled: true

  # Set gzip compression level.
  #compression_level: 0

  # Protocol - either `http` (default) or `https`.
  #protocol: "https"

  # Authentication credentials - either API key or username/password.
  #api_key: "id:api_key"
  #username: "elastic"
  #password: "changeme"

  # Dictionary of HTTP parameters to pass within the url with index operations.
  #parameters:
    #param1: value1
    #param2: value2

  # Number of workers per Elasticsearch host.
  #worker: 1

  # By using the configuration below, APM documents are stored to separate indices,
  # depending on their `processor.event`:
  # - error
  # - transaction
  # - span
  # - sourcemap
  #
  # The indices are all prefixed with `apm-%{[observer.version]}`.
  # To allow managing indices based on their age, all indices (except for sourcemaps)
  # end with the information of the day they got indexed.
  # e.g. "apm-7.3.0-transaction-2019.07.20"
  #
  # Be aware that you can only specify one Elasticsearch template.
  # If you modify the index patterns you must also update these configurations accordingly,
  # as they need to be aligned:
  # * `setup.template.name`
  # * `setup.template.pattern`
  #index: "apm-%{[observer.version]}-%{+yyyy.MM.dd}"
  #indices:
  #  - index: "apm-%{[observer.version]}-sourcemap"
  #    when.contains:
  #      processor.event: "sourcemap"
  #
  #  - index: "apm-%{[observer.version]}-error-%{+yyyy.MM.dd}"
  #    when.contains:
  #      processor.event: "error"
  #
  #  - index: "apm-%{[observer.version]}-transaction-%{+yyyy.MM.dd}"
  #    when.contains:
  #      processor.event: "transaction"
  #
  #  - index: "apm-%{[observer.version]}-span-%{+yyyy.MM.dd}"
  #    when.contains:
  #      processor.event: "span"
  #
  #  - index: "apm-%{[observer.version]}-metric-%{+yyyy.MM.dd}"
  #    when.contains:
  #      processor.event: "metric"
  #
  #  - index: "apm-%{[observer.version]}-onboarding-%{+yyyy.MM.dd}"
  #    when.contains:
  #      processor.event: "onboarding"

  # A pipeline is a definition of processors applied to documents when ingesting them to Elasticsearch.
  # APM Server comes with a default pipeline definition, located at `ingest/pipeline/definition.json`, which is
  # loaded to Elasticsearch by default (see `apm-server.register.ingest.pipeline`).
  # APM pipeline is enabled by default. To disable it, set `pipeline: _none`.
  #pipeline: "apm"

  # Optional HTTP Path.
  #path: "/elasticsearch"

  # Custom HTTP headers to add to each request.
  #headers:
  #  X-My-Header: Contents of the header

  # Proxy server url.
  #proxy_url: http://proxy:3128

  # The number of times a particular Elasticsearch index operation is attempted. If
  # the indexing operation doesn't succeed after this many retries, the events are
  # dropped. The default is 3.
  #max_retries: 3

  # The maximum number of events to bulk in a single Elasticsearch bulk API index request.
  # The default is 50.
  #bulk_max_size: 50

  # The number of seconds to wait before trying to reconnect to Elasticsearch
  # after a network error. After waiting backoff.init seconds, apm-server
  # tries to reconnect. If the attempt fails, the backoff timer is increased
  # exponentially up to backoff.max. After a successful connection, the backoff
  # timer is reset. The default is 1s.
  #backoff.init: 1s

  # The maximum number of seconds to wait before attempting to connect to
  # Elasticsearch after a network error. The default is 60s.
  #backoff.max: 60s

  # Configure http request timeout before failing an request to Elasticsearch.
  #timeout: 90

  # Enable custom SSL settings. Set to false to ignore custom SSL settings for secure communication.
  #ssl.enabled: true

  # Optional SSL configuration options. SSL is off by default, change the `protocol` option if you want to enable `https`.
  # Configure SSL verification mode. If `none` is configured, all server hosts
  # and certificates will be accepted. In this mode, SSL based connections are
  # susceptible to man-in-the-middle attacks. Use only for testing. Default is
  # `full`.
  #ssl.verification_mode: full

  # List of supported/valid TLS versions. By default all TLS versions 1.0 up to
  # 1.2 are enabled.
  #ssl.supported_protocols: [TLSv1.0, TLSv1.1, TLSv1.2]

  # List of root certificates for HTTPS server verifications.
  #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

  # Certificate for SSL client authentication.
  #ssl.certificate: "/etc/pki/client/cert.pem"

  # Client Certificate Key
  #ssl.key: "/etc/pki/client/cert.key"

  # Optional passphrase for decrypting the Certificate Key.
  # It is recommended to use the provided keystore instead of entering the passphrase in plain text.
  #ssl.key_passphrase: ''

  # Configure cipher suites to be used for SSL connections.
  #ssl.cipher_suites: []

  # Configure curve types for ECDHE based cipher suites.
  #ssl.curve_types: []

  # Configure what types of renegotiation are supported. Valid options are
  # never, once, and freely. Default is never.
  #ssl.renegotiation: never

#----------------------------- Console output -----------------------------
#output.console:
  # Boolean flag to enable or disable the output module.
  #enabled: false

  # Configure JSON encoding.
  #codec.json:
    # Pretty-print JSON event.
    #pretty: false

    # Configure escaping HTML symbols in strings.
    #escape_html: false

#---------------------------- Logstash output -----------------------------
#output.logstash:
  # Boolean flag to enable or disable the output module.
  #enabled: false

  # The Logstash hosts.
  #hosts: ["localhost:5044"]

  # Number of workers per Logstash host.
  #worker: 1

  # Set gzip compression level.
  #compression_level: 3

  # Configure escaping html symbols in strings.
  #escape_html: true

  # Optional maximum time to live for a connection to Logstash, after which the
  # connection will be re-established.  A value of `0s` (the default) will
  # disable this feature.
  #
  # Not yet supported for async connections (i.e. with the "pipelining" option set).
  #ttl: 30s

  # Optional load balance the events between the Logstash hosts. Default is false.
  #loadbalance: false

  # Number of batches to be sent asynchronously to Logstash while processing
  # new batches.
  #pipelining: 2

  # If enabled only a subset of events in a batch of events is transferred per
  # group.  The number of events to be sent increases up to `bulk_max_size`
  # if no error is encountered.
  #slow_start: false

  # The number of seconds to wait before trying to reconnect to Logstash
  # after a network error. After waiting backoff.init seconds, apm-server
  # tries to reconnect. If the attempt fails, the backoff timer is increased
  # exponentially up to backoff.max. After a successful connection, the backoff
  # timer is reset. The default is 1s.
  #backoff.init: 1s

  # The maximum number of seconds to wait before attempting to connect to
  # Logstash after a network error. The default is 60s.
  #backoff.max: 60s

  # Optional index name. The default index name is set to apm
  # in all lowercase.
  #index: 'apm'

  # SOCKS5 proxy server URL
  #proxy_url: socks5://user:password@socks5-server:2233

  # Resolve names locally when using a proxy server. Defaults to false.
  #proxy_use_local_resolver: false

  # Enable SSL support. SSL is automatically enabled if any SSL setting is set.
  #ssl.enabled: false

  # Optional SSL configuration options. SSL is off by default.
  # Configure SSL verification mode. If `none` is configured, all server hosts
  # and certificates will be accepted. In this mode, SSL based connections are
  # susceptible to man-in-the-middle attacks. Use only for testing. Default is
  # `full`.
  #ssl.verification_mode: full

  # List of supported/valid TLS versions. By default all TLS versions 1.0 up to
  # 1.2 are enabled.
  #ssl.supported_protocols: [TLSv1.0, TLSv1.1, TLSv1.2]

  # List of root certificates for HTTPS server verifications.
  #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

  # Certificate for SSL client authentication.
  #ssl.certificate: "/etc/pki/client/cert.pem"

  # Client Certificate Key
  #ssl.key: "/etc/pki/client/cert.key"

  # Optional passphrase for decrypting the Certificate Key.
  # It is recommended to use the provided keystore instead of entering the passphrase in plain text.
  #ssl.key_passphrase: ''

  # Configure cipher suites to be used for SSL connections.
  #ssl.cipher_suites: []

  # Configure curve types for ECDHE based cipher suites.
  #ssl.curve_types: []

  # Configure what types of renegotiation are supported. Valid options are
  # never, once, and freely. Default is never.
  #ssl.renegotiation: never

#------------------------------ Kafka output ------------------------------
#output.kafka:
  # Boolean flag to enable or disable the output module.
  #enabled: false

  # The list of Kafka broker addresses from where to fetch the cluster metadata.
  # The cluster metadata contain the actual Kafka brokers events are published
  # to.
  #hosts: ["localhost:9092"]

  # The Kafka topic used for produced events. The setting can be a format string
  # using any event field. To set the topic from document type use `%{[type]}`.
  #topic: beats

  # The Kafka event key setting. Use format string to create unique event key.
  # By default no event key will be generated.
  #key: ''

  # The Kafka event partitioning strategy. Default hashing strategy is `hash`
  # using the `output.kafka.key` setting or randomly distributes events if
  # `output.kafka.key` is not configured.
  #partition.hash:
    # If enabled, events will only be published to partitions with reachable
    # leaders. Default is false.
    #reachable_only: false

    # Configure alternative event field names used to compute the hash value.
    # If empty `output.kafka.key` setting will be used.
    # Default value is empty list.
    #hash: []

  # Authentication details. Password is required if username is set.
  #username: ''
  #password: ''

  # Kafka version libbeat is assumed to run against. Defaults to the "1.0.0".
  #version: '1.0.0'

  # Configure JSON encoding.
  #codec.json:
    # Pretty print json event
    #pretty: false

    # Configure escaping html symbols in strings.
    #escape_html: true

  # Metadata update configuration. Metadata do contain leader information
  # deciding which broker to use when publishing.
  #metadata:
    # Max metadata request retry attempts when cluster is in middle of leader
    # election. Defaults to 3 retries.
    #retry.max: 3

    # Waiting time between retries during leader elections. Default is 250ms.
    #retry.backoff: 250ms

    # Refresh metadata interval. Defaults to every 10 minutes.
    #refresh_frequency: 10m

  # The number of concurrent load-balanced Kafka output workers.
  #worker: 1

  # The number of times to retry publishing an event after a publishing failure.
  # After the specified number of retries, the events are typically dropped.
  # Set max_retries to a value less than 0 to retry
  # until all events are published. The default is 3.
  #max_retries: 3

  # The maximum number of events to bulk in a single Kafka request. The default
  # is 2048.
  #bulk_max_size: 2048

  # The number of seconds to wait for responses from the Kafka brokers before
  # timing out. The default is 30s.
  #timeout: 30s

  # The maximum duration a broker will wait for number of required ACKs. The
  # default is 10s.
  #broker_timeout: 10s

  # The number of messages buffered for each Kafka broker. The default is 256.
  #channel_buffer_size: 256

  # The keep-alive period for an active network connection. If 0s, keep-alives
  # are disabled. The default is 0 seconds.
  #keep_alive: 0

  # Sets the output compression codec. Must be one of none, snappy and gzip. The
  # default is gzip.
  #compression: gzip

  # Set the compression level. Currently only gzip provides a compression level
  # between 0 and 9. The default value is chosen by the compression algorithm.
  #compression_level: 4

  # The maximum permitted size of JSON-encoded messages. Bigger messages will be
  # dropped. The default value is 1000000 (bytes). This value should be equal to
  # or less than the broker's message.max.bytes.
  #max_message_bytes: 1000000

  # The ACK reliability level required from broker. 0=no response, 1=wait for
  # local commit, -1=wait for all replicas to commit. The default is 1.  Note:
  # If set to 0, no ACKs are returned by Kafka. Messages might be lost silently
  # on error.
  #required_acks: 1

  # The configurable ClientID used for logging, debugging, and auditing
  # purposes.  The default is "beats".
  #client_id: beats

  # Enable SSL support. SSL is automatically enabled if any SSL setting is set.
  #ssl.enabled: false

  # Optional SSL configuration options. SSL is off by default.
  # Configure SSL verification mode. If `none` is configured, all server hosts
  # and certificates will be accepted. In this mode, SSL based connections are
  # susceptible to man-in-the-middle attacks. Use only for testing. Default is
  # `full`.
  #ssl.verification_mode: full

  # List of supported/valid TLS versions. By default all TLS versions 1.0 up to
  # 1.2 are enabled.
  #ssl.supported_protocols: [TLSv1.0, TLSv1.1, TLSv1.2]

  # List of root certificates for HTTPS server verifications.
  #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

  # Certificate for SSL client authentication.
  #ssl.certificate: "/etc/pki/client/cert.pem"

  # Client Certificate Key
  #ssl.key: "/etc/pki/client/cert.key"

  # Optional passphrase for decrypting the Certificate Key.
  # It is recommended to use the provided keystore instead of entering the passphrase in plain text.
  #ssl.key_passphrase: ''

  # Configure cipher suites to be used for SSL connections.
  #ssl.cipher_suites: []

  # Configure curve types for ECDHE based cipher suites.
  #ssl.curve_types: []

  # Configure what types of renegotiation are supported. Valid options are
  # never, once, and freely. Default is never.
  #ssl.renegotiation: never

#================================= Paths ==================================

# The home path for the apm-server installation. This is the default base path
# for all other path settings and for miscellaneous files that come with the
# distribution.
# If not set by a CLI flag or in the configuration file, the default for the
# home path is the location of the binary.
#path.home:

# The configuration path for the apm-server installation. This is the default
# base path for configuration files, including the main YAML configuration file
# and the Elasticsearch template file. If not set by a CLI flag or in the
# configuration file, the default for the configuration path is the home path.
#path.config: ${path.home}

# The data path for the apm-server installation. This is the default base path
# for all the files in which apm-server needs to store its data. If not set by a
# CLI flag or in the configuration file, the default for the data path is a data
# subdirectory inside the home path.
#path.data: ${path.home}/data

# The logs path for an apm-server installation. If not set by a CLI flag or in the
# configuration file, the default is a logs subdirectory inside the home path.
#path.logs: ${path.home}/logs

#================================= Logging =================================

# There are three options for the log output: syslog, file, and stderr.
# Windows systems default to file output. All other systems default to syslog.

# Sets the minimum log level. The default log level is info.
# Available log levels are: error, warning, info, or debug.
#logging.level: info

# Enable debug output for selected components. To enable all selectors use ["*"].
# Other available selectors are "beat", "publish", or "service".
# Multiple selectors can be chained.
#logging.selectors: [ ]

# Send all logging output to syslog. The default is false.
#logging.to_syslog: true

# If enabled, apm-server periodically logs its internal metrics that have changed
# in the last period. For each metric that changed, the delta from the value at
# the beginning of the period is logged. Also, the total values for
# all non-zero internal metrics are logged on shutdown. The default is false.
#logging.metrics.enabled: false

# The period after which to log the internal metrics. The default is 30s.
#logging.metrics.period: 30s

# Logging to rotating files. When true, writes all logging output to files.
# The log files are automatically rotated when the log file size limit is reached.
#logging.to_files: true
#logging.files:
  # Configure the path where the logs are written. The default is the logs directory
  # under the home path (the binary location).
  #path: /var/log/apm-server

  # The name of the files where the logs are written to.
  #name: apm-server

  # Configure log file size limit. If limit is reached, log file will be
  # automatically rotated.
  #rotateeverybytes: 10485760 # = 10MB

  # Number of rotated log files to keep. Oldest files will be deleted first.
  #keepfiles: 7

  # The permissions mask to apply when rotating log files. The default value is 0600.
  # Must be a valid Unix-style file permissions mask expressed in octal notation.
  #permissions: 0600

  # Enable log file rotation on time intervals in addition to size-based rotation.
  # Intervals must be at least 1s. Values of 1m, 1h, 24h, 7*24h, 30*24h, and 365*24h
  # are boundary-aligned with minutes, hours, days, weeks, months, and years as
  # reported by the local system clock. All other intervals are calculated from the
  # Unix epoch. Defaults to disabled.
  #interval: 0

# Set to true to log messages in json format.
#logging.json: false

#=============================== HTTP Endpoint ===============================

# apm-server can expose internal metrics through a HTTP endpoint. For security
# reasons the endpoint is disabled by default. This feature is currently experimental.
# Stats can be access through http://localhost:5066/stats. For pretty JSON output
# append ?pretty to the URL.

# Defines if the HTTP endpoint is enabled.
#http.enabled: false

# The HTTP endpoint will bind to this hostname or IP address. It is recommended to use only localhost.
#http.host: localhost

# Port on which the HTTP endpoint will bind. Default is 5066.
#http.port: 5066

#============================= X-pack Monitoring =============================

# APM server can export internal metrics to a central Elasticsearch monitoring
# cluster.  This requires x-pack monitoring to be enabled in Elasticsearch.  The
# reporting is disabled by default.

# Set to true to enable the monitoring reporter.
#monitoring.enabled: false

# Most settings from the Elasticsearch output are accepted here as well.
# Note that these settings should be configured to point to your Elasticsearch *monitoring* cluster.
# Any setting that is not set is automatically inherited from the Elasticsearch
# output configuration. This means that if you have the Elasticsearch output configured,
# you can simply uncomment the following line.
#monitoring.elasticsearch:

  # Protocol - either `http` (default) or `https`.
  #protocol: "https"

  # Authentication credentials - either API key or username/password.
  #api_key: "id:api_key"
  #username: "elastic"
  #password: "changeme"

  # Array of hosts to connect to.
  # Scheme and port can be left out and will be set to the default (`http` and `9200`).
  # In case you specify and additional path, the scheme is required: `http://localhost:9200/path`.
  # IPv6 addresses should always be defined as: `https://[2001:db8::1]:9200`.
  #hosts: ["localhost:9200"]

  # Set gzip compression level.
  #compression_level: 0

  # Dictionary of HTTP parameters to pass within the URL with index operations.
  #parameters:
    #param1: value1
    #param2: value2

  # Custom HTTP headers to add to each request.
  #headers:
  #  X-My-Header: Contents of the header

  # Proxy server url.
  #proxy_url: http://proxy:3128

  # The number of times a particular Elasticsearch index operation is attempted. If
  # the indexing operation doesn't succeed after this many retries, the events are
  # dropped. The default is 3.
  #max_retries: 3

  # The maximum number of events to bulk in a single Elasticsearch bulk API index request.
  # The default is 50.
  #bulk_max_size: 50

  # The number of seconds to wait before trying to reconnect to Elasticsearch
  # after a network error. After waiting backoff.init seconds, apm-server
  # tries to reconnect. If the attempt fails, the backoff timer is increased
  # exponentially up to backoff.max. After a successful connection, the backoff
  # timer is reset. The default is 1s.
  #backoff.init: 1s

  # The maximum number of seconds to wait before attempting to connect to
  # Elasticsearch after a network error. The default is 60s.
  #backoff.max: 60s

  # Configure HTTP request timeout before failing an request to Elasticsearch.
  #timeout: 90

  # Enable custom SSL settings. Set to false to ignore custom SSL settings for secure communication.
  #ssl.enabled: true

  # Optional SSL configuration options. SSL is off by default, change the `protocol` option if you want to enable `https`.
  # Configure SSL verification mode. If `none` is configured, all server hosts
  # and certificates will be accepted. In this mode, SSL based connections are
  # susceptible to man-in-the-middle attacks. Use only for testing. Default is
  # `full`.
  #ssl.verification_mode: full

  # List of supported/valid TLS versions. By default all TLS versions 1.0 up to
  # 1.2 are enabled.
  #ssl.supported_protocols: [TLSv1.0, TLSv1.1, TLSv1.2]

  # List of root certificates for HTTPS server verifications.
  #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

  # Certificate for SSL client authentication.
  #ssl.certificate: "/etc/pki/client/cert.pem"

  # Client Certificate Key
  #ssl.key: "/etc/pki/client/cert.key"

  # Optional passphrase for decrypting the Certificate Key.
  # It is recommended to use the provided keystore instead of entering the passphrase in plain text.
  #ssl.key_passphrase: ''

  # Configure cipher suites to be used for SSL connections.
  #ssl.cipher_suites: []

  # Configure curve types for ECDHE based cipher suites.
  #ssl.curve_types: []

  # Configure what types of renegotiation are supported. Valid options are
  # never, once, and freely. Default is never.
  #ssl.renegotiation: never

  #metrics.period: 10s
  #state.period: 1m