apm-server.docker.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: "0.0.0.0:8200"

  # Agent authorization configuration. If no methods are defined, all requests will be allowed.
  #auth:
    # Agent authorization using Elasticsearch API Keys.
    #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

    # Define a shared secret token for authorizing agents using the "Bearer" authorization method.
    #secret_token:

    # Allow anonymous access only for specified agents and/or services. This is primarily intended to allow
    # limited access for untrusted agents, such as Real User Monitoring.
    #anonymous:
      # By default anonymous auth is automatically enabled when either auth.api_key or
      # auth.secret_token is enabled, and RUM is enabled. Otherwise, anonymous auth is
      # disabled by default.
      #
      # When anonymous auth is enabled, only agents matching allow_agent and services
      # matching allow_service are allowed. See below for details on default values for
      # allow_agent.
      #enabled:

      # Allow anonymous access only for specified agents.
      #allow_agent: [rum-js, js-base]

      # Allow anonymous access only for specified service names. By default, all service names are allowed.
      #allow_service: []

      # Rate-limit anonymous access by IP and number of events.
      #rate_limit:
        # Rate limiting is defined per unique client IP address, for a limited number of IP addresses.
        # Sites with many concurrent clients should consider increasing this limit. Defaults to 1000.
        #ip_limit: 1000

        # Defines the maximum amount of events allowed per IP per second. Defaults to 300. The overall
        # maximum event throughput for anonymous access is (event_limit * ip_limit).
        #event_limit: 300

  # 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: 30s

  # 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

  # Custom HTTP headers to add to all HTTP responses, e.g. for security policy compliance.
  #response_headers:
  #  X-My-Header: Contents of the header

  # 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

  # If specified, APM Server will record this value in events which have no service environment
  # defined, and add it to agent configuration queries to Kibana when none is specified in the
  # request from the agent.
  #default_service_environment:

  # All events will be recorded in this data stream namespace when not managed by fleet.
  # data_streams.namespace: default

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

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


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

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

    # 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 1.3 are enabled.
    #supported_protocols: [TLSv1.1, TLSv1.2, TLSv1.3]

    # Configure cipher suites to be used for SSL connections.
    # Note that cipher suites are not configurable for TLS 1.3.
    #cipher_suites: []

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

  #---------------------------- 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

    #-- 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: ['*']

    # A list of Access-Control-Allow-Headers to allow RUM requests, in addition to "Content-Type",
    # "Content-Encoding", and "Accept"
    #allow_headers: []

    # Custom HTTP headers to add to RUM responses, e.g. for security policy compliance.
    #response_headers:
    #  X-My-Header: Contents of the header

    # 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

      # Timeout for fetching source maps.
      #timeout: 5s

      # The `cache.expiration` determines how long a source map should be cached in memory.
      # Note that values configured without a time unit will be interpreted as seconds.
      #cache.expiration: 5m

      # Source maps may be fetched from Elasticsearch by using the output.elasticsearch configuration,
      # and running apm-server standalone.
      #
      # Note: fetching source maps from Elasticsearch is not supported if apm-server is being managed by
      # Fleet. This configuration is only applicable to standalone apm-servers, for backwards compatibility
      # with source maps stored in Elasticsearch by older versions of apm-server. New source maps must now
      # be uploaded via Kibana, and `apm-server.kibana` configured in standalone apm-servers for fetching
      # them.
      #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://elasticsearch:9200/path`.
        # IPv6 addresses should always be defined as: `https://[2001:db8::1]:9200`.
        #hosts: ["elasticsearch: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"

      # Index pattern in which to search for source maps, when fetching source maps from Elasticsearch.
      #index_pattern: "apm-*-sourcemap*"

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

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

    # Agent config will be fetched from Elasticsearch using the output.elasticsearch configuration.
    # Elasticsearch authentication configurations are exposed to allow fine-tuned permission control
    # and is required when working with Elastic Agent standalone or Fleet.
    # This will override credentials in output.elasticsearch configuration.
    #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://elasticsearch:9200/path`.
      # IPv6 addresses should always be defined as: `https://[2001:db8::1]:9200`.
      #hosts: ["elasticsearch: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"

  #kibana:
    # Required when `apm-server.agent.config.elasticsearch` is not set AND `output.elasticsearch`
    # is not valid (either because it's not set or there aren't enough privileges).
    #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 authentication with an API key
    #api_key: "id:api_key"

    # 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`.
    #
    # Control the verification of Kibana certificates. Valid values are:
    # * full, which verifies that the provided certificate is signed by a trusted
    # authority (CA) and also verifies that the server's hostname (or IP address)
    # matches the names identified within the certificate.
    # * strict, which verifies that the provided certificate is signed by a trusted
    # authority (CA) and also verifies that the server's hostname (or IP address)
    # matches the names identified within the certificate. If the Subject Alternative
    # Name is empty, it returns an error.
    # * certificate, which verifies that the provided certificate is signed by a
    # trusted authority (CA), but does not perform any hostname verification.
    #  * none, which performs no verification of the server's certificate. This
    # mode disables many of the security benefits of SSL/TLS and should only be used
    # after very careful consideration. It is primarily intended as a temporary
    # diagnostic mechanism when attempting to resolve TLS errors; its use in
    # production environments is strongly discouraged.
    #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 - tail-based sampling ----------------------------

  #sampling.tail:
    # Set to `true` to enable tail based sampling. Disabled by default.
    #enabled: false

    # Synchronization interval for multiple APM Servers. Should be in the order of tens of seconds or low minutes.
    #interval: 1m

    # Criteria used to match a root transaction to a sample rate.
    #policies: []

# 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:

#============================= 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://elasticsearch:9200/path`.
  # IPv6 addresses should always be defined as: `https://[2001:db8::1]:9200`.
  hosts: ["elasticsearch:9200"]

  # 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"

  # 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 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

  # The bulk request size threshold, in bytes, before flushing to Elasticsearch.
  # The value must have a suffix, e.g. `"2MB"`. The default is `1MB`.
  #flush_bytes: 1MB

  # The maximum duration to accumulate events for a bulk request before being flushed to Elasticsearch.
  # The value must have a duration suffix, e.g. `"5s"`. The default is `1s`.
  #flush_interval: 1s

  # 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`.
  #
  # Control the verification of Elasticsearch certificates. Valid values are:
  # * full, which verifies that the provided certificate is signed by a trusted
  # authority (CA) and also verifies that the server's hostname (or IP address)
  # matches the names identified within the certificate.
  # * strict, which verifies that the provided certificate is signed by a trusted
  # authority (CA) and also verifies that the server's hostname (or IP address)
  # matches the names identified within the certificate. If the Subject Alternative
  # Name is empty, it returns an error.
  # * certificate, which verifies that the provided certificate is signed by a
  # trusted authority (CA), but does not perform any hostname verification.
  #  * none, which performs no verification of the server's certificate. This
  # mode disables many of the security benefits of SSL/TLS and should only be used
  # after very careful consideration. It is primarily intended as a temporary
  # diagnostic mechanism when attempting to resolve TLS errors; its use in
  # production environments is strongly discouraged.
  #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.
  #
  # Control the verification of Logstash certificates. Valid values are:
  # * full, which verifies that the provided certificate is signed by a trusted
  # authority (CA) and also verifies that the server's hostname (or IP address)
  # matches the names identified within the certificate.
  # * strict, which verifies that the provided certificate is signed by a trusted
  # authority (CA) and also verifies that the server's hostname (or IP address)
  # matches the names identified within the certificate. If the Subject Alternative
  # Name is empty, it returns an error.
  # * certificate, which verifies that the provided certificate is signed by a
  # trusted authority (CA), but does not perform any hostname verification.
  #  * none, which performs no verification of the server's certificate. This
  # mode disables many of the security benefits of SSL/TLS and should only be used
  # after very careful consideration. It is primarily intended as a temporary
  # diagnostic mechanism when attempting to resolve TLS errors; its use in
  # production environments is strongly discouraged.
  #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.
  #
  # Control the verification of Kafka certificates. Valid values are:
  # * full, which verifies that the provided certificate is signed by a trusted
  # authority (CA) and also verifies that the server's hostname (or IP address)
  # matches the names identified within the certificate.
  # * strict, which verifies that the provided certificate is signed by a trusted
  # authority (CA) and also verifies that the server's hostname (or IP address)
  # matches the names identified within the certificate. If the Subject Alternative
  # Name is empty, it returns an error.
  # * certificate, which verifies that the provided certificate is signed by a
  # trusted authority (CA), but does not perform any hostname verification.
  #  * none, which performs no verification of the server's certificate. This
  # mode disables many of the security benefits of SSL/TLS and should only be used
  # after very careful consideration. It is primarily intended as a temporary
  # diagnostic mechanism when attempting to resolve TLS errors; its use in
  # production environments is strongly discouraged.
  #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

  # Authentication type to use with Kerberos. Available options: keytab, password.
  #kerberos.auth_type: password

  # Path to the keytab file. It is used when auth_type is set to keytab.
  #kerberos.keytab: /etc/krb5kdc/kafka.keytab

  # Path to the Kerberos configuration.
  #kerberos.config_path: /etc/path/config

  # The service principal name.
  #kerberos.service_name: HTTP/my-service@realm

  # Name of the Kerberos user. It is used when auth_type is set to password.
  #kerberos.username: elastic

  # Password of the Kerberos user. It is used when auth_type is set to password.
  #kerberos.password: changeme

  # Kerberos realm.
  #kerberos.realm: ELASTIC

#============================= Instrumentation =============================

# 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: ""

  # Hosts to report instrumentation results to.
  # For reporting to itself, leave this field commented
  #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:

#================================= 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

#=============================== 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://elasticsearch:9200/path`.
  # IPv6 addresses should always be defined as: `https://[2001:db8::1]:9200`.
  #hosts: ["elasticsearch:9200"]

  # Set gzip compression level.
  #compression_level: 0

  # 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 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`.
  #
  # Control the verification of Elasticsearch certificates. Valid values are:
  # * full, which verifies that the provided certificate is signed by a trusted
  # authority (CA) and also verifies that the server's hostname (or IP address)
  # matches the names identified within the certificate.
  # * strict, which verifies that the provided certificate is signed by a trusted
  # authority (CA) and also verifies that the server's hostname (or IP address)
  # matches the names identified within the certificate. If the Subject Alternative
  # Name is empty, it returns an error.
  # * certificate, which verifies that the provided certificate is signed by a
  # trusted authority (CA), but does not perform any hostname verification.
  #  * none, which performs no verification of the server's certificate. This
  # mode disables many of the security benefits of SSL/TLS and should only be used
  # after very careful consideration. It is primarily intended as a temporary
  # diagnostic mechanism when attempting to resolve TLS errors; its use in
  # production environments is strongly discouraged.
  #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