## CLO GENERATED CONFIGURATION ###
# This file is a copy of the fluentd configuration entrypoint
# which should normally be supplied in a configmap.

<system>
  log_level "#{ENV['LOG_LEVEL'] || 'warn'}"
</system>

# Prometheus Monitoring
<source>
  @type prometheus
  bind "#{ENV['POD_IP']}"
  <ssl>
    enable true
    certificate_path "#{ENV['METRICS_CERT'] || '/etc/fluent/metrics/tls.crt'}"
    private_key_path "#{ENV['METRICS_KEY'] || '/etc/fluent/metrics/tls.key'}"
  </ssl>
</source>

<source>
  @type prometheus_monitor
  <labels>
    hostname ${hostname}
  </labels>
</source>

# excluding prometheus_tail_monitor
# since it leaks namespace/pod info
# via file paths

# tail_monitor plugin which publishes log_collected_bytes_total
<source>
  @type collected_tail_monitor
  <labels>
    hostname ${hostname}
  </labels>
</source>

# This is considered experimental by the repo
<source>
  @type prometheus_output_monitor
  <labels>
    hostname ${hostname}
  </labels>
</source>

# Logs from containers (including openshift containers)
<source>
  @type tail
  @id container-input
  path "/var/log/containers/*.log"
  exclude_path ["/var/log/containers/fluentd-*_openshift-logging_*.log", "/var/log/containers/elasticsearch-*_openshift-logging_*.log", "/var/log/containers/kibana-*_openshift-logging_*.log"]
  pos_file "/var/lib/fluentd/pos/es-containers.log.pos"
  refresh_interval 5
  rotate_wait 5
  tag kubernetes.*
  read_from_head "true"
  skip_refresh_on_startup true
  @label @MEASURE
  <parse>
    @type multi_format
    <pattern>
      format json
      time_format '%Y-%m-%dT%H:%M:%S.%N%Z'
      keep_time_key true
    </pattern>
    <pattern>
      format regexp
      expression /^(?<time>[^\s]+) (?<stream>stdout|stderr)( (?<logtag>.))? (?<log>.*)$/
      time_format '%Y-%m-%dT%H:%M:%S.%N%:z'
      keep_time_key true
    </pattern>
  </parse>
</source>

# Increment Prometheus metrics
<label @MEASURE>
  <filter **>
    @type record_transformer
    enable_ruby
    <record>
      msg_size ${record.to_s.length}
    </record>
  </filter>
  
  <filter **>
    @type prometheus
    <metric>
      name cluster_logging_collector_input_record_total
      type counter
      desc The total number of incoming records
      <labels>
        tag ${tag}
        hostname ${hostname}
      </labels>
    </metric>
  </filter>
  
  <filter **>
    @type prometheus
    <metric>
      name cluster_logging_collector_input_record_bytes
      type counter
      desc The total bytes of incoming records
      key msg_size
      <labels>
        tag ${tag}
        hostname ${hostname}
      </labels>
    </metric>
  </filter>
  
  <filter **>
    @type record_transformer
    remove_keys msg_size
  </filter>
  
  # Journal Logs go to INGRESS pipeline
  <match journal>
    @type relabel
    @label @INGRESS
  </match>
  
  # Audit Logs go to INGRESS pipeline
  <match *audit.log>
    @type relabel
    @label @INGRESS
  </match>
  
  # Kubernetes Logs go to CONCAT pipeline
  <match kubernetes.**>
    @type relabel
    @label @CONCAT
  </match>
</label>

# Concat log lines of container logs, and send to INGRESS pipeline
<label @CONCAT>
  <filter kubernetes.**>
    @type concat
    key log
    partial_key logtag
    partial_value P
    separator ''
  </filter>
  
  <match kubernetes.**>
    @type relabel
    @label @_MULITLINE_DETECT
  </match>
</label>

<label @_MULITLINE_DETECT>
  <match kubernetes.**>
    @id multiline-detect-except
    @type detect_exceptions
    remove_tag_prefix 'kubernetes'
    message log
    force_line_breaks true
    multiline_flush_interval .2
  </match>
  <match **>
    @type relabel
    @label @INGRESS
  </match>
</label>

# Ingress pipeline
<label @INGRESS>
  # Fix tag removed by multiline exception detection
  <match var.log.containers.**>
    @type rewrite_tag_filter
    <rule>
      key log
      pattern /.*/
      tag kubernetes.${tag}
    </rule>
  </match>
  
  # Filter out PRIORITY from journal logs
  <filter journal>
    @type grep
    <exclude>
      key PRIORITY
      pattern ^7$
    </exclude>
  </filter>
  
  # Process OVN logs
  <filter ovn-audit.log**>
    @type record_modifier
    <record>
      @timestamp ${DateTime.parse(record['message'].split('|')[0]).rfc3339(6)}
      level ${record['message'].split('|')[3].downcase}
    </record>
  </filter>
  
  # Retag Journal logs to specific tags
  <match journal>
    @type rewrite_tag_filter
    # skip to @INGRESS label section
    @label @INGRESS
  
    # see if this is a kibana container for special log handling
    # looks like this:
    # k8s_kibana.a67f366_logging-kibana-1-d90e3_logging_26c51a61-2835-11e6-ad29-fa163e4944d5_f0db49a2
    # we filter these logs through the kibana_transform.conf filter
    <rule>
      key CONTAINER_NAME
      pattern ^k8s_kibana\.
      tag kubernetes.journal.container.kibana
    </rule>
  
    <rule>
      key CONTAINER_NAME
      pattern ^k8s_[^_]+_logging-eventrouter-[^_]+_
      tag kubernetes.journal.container._default_.kubernetes-event
    </rule>
  
    # mark logs from default namespace for processing as k8s logs but stored as system logs
    <rule>
      key CONTAINER_NAME
      pattern ^k8s_[^_]+_[^_]+_default_
      tag kubernetes.journal.container._default_
    </rule>
  
    # mark logs from kube-* namespaces for processing as k8s logs but stored as system logs
    <rule>
      key CONTAINER_NAME
      pattern ^k8s_[^_]+_[^_]+_kube-(.+)_
      tag kubernetes.journal.container._kube-$1_
    </rule>
  
    # mark logs from openshift-* namespaces for processing as k8s logs but stored as system logs
    <rule>
      key CONTAINER_NAME
      pattern ^k8s_[^_]+_[^_]+_openshift-(.+)_
      tag kubernetes.journal.container._openshift-$1_
    </rule>
  
    # mark logs from openshift namespace for processing as k8s logs but stored as system logs
    <rule>
      key CONTAINER_NAME
      pattern ^k8s_[^_]+_[^_]+_openshift_
      tag kubernetes.journal.container._openshift_
    </rule>
  
    # mark fluentd container logs
    <rule>
      key CONTAINER_NAME
      pattern ^k8s_.*fluentd
      tag kubernetes.journal.container.fluentd
    </rule>
  
    # this is a kubernetes container
    <rule>
      key CONTAINER_NAME
      pattern ^k8s_
      tag kubernetes.journal.container
    </rule>
  
    # not kubernetes - assume a system log or system container log
    <rule>
      key _TRANSPORT
      pattern .+
      tag journal.system
    </rule>
  </match>
  
  # Invoke kubernetes apiserver to get kunbernetes metadata
  <filter kubernetes.**>
    @type kubernetes_metadata
    kubernetes_url 'https://kubernetes.default.svc'
    cache_size '1000'
    watch 'false'
    use_journal 'nil'
    ssl_partial_chain 'true'
  </filter>
  
  # Parse Json fields for container, journal and eventrouter logs
  <filter kubernetes.journal.**>
    @type parse_json_field
    merge_json_log 'false'
    preserve_json_log 'true'
    json_fields 'log,MESSAGE'
  </filter>
  
  <filter kubernetes.var.log.containers.**>
    @type parse_json_field
    merge_json_log 'false'
    preserve_json_log 'true'
    json_fields 'log,MESSAGE'
  </filter>
  
  <filter kubernetes.var.log.containers.eventrouter-** kubernetes.var.log.containers.cluster-logging-eventrouter-**>
    @type parse_json_field
    merge_json_log true
    preserve_json_log true
    json_fields 'log,MESSAGE'
  </filter>
  
  # Clean kibana log fields
  <filter **kibana**>
    @type record_transformer
    enable_ruby
    <record>
      log ${record['err'] || record['msg'] || record['MESSAGE'] || record['log']}
    </record>
    remove_keys req,res,msg,name,level,v,pid,err
  </filter>
  
  # Fix level field in audit logs
  <filter k8s-audit.log**>
    @type record_modifier
    <record>
      k8s_audit_level ${record['level']}
      level info
    </record>
  </filter>
  
  <filter openshift-audit.log**>
    @type record_modifier
    <record>
      openshift_audit_level ${record['level']}
      level info
    </record>
  </filter>
  
  # Viaq Data Model
  <filter **>
    @type viaq_data_model
    elasticsearch_index_prefix_field 'viaq_index_name'
    default_keep_fields CEE,time,@timestamp,aushape,ci_job,collectd,docker,fedora-ci,file,foreman,geoip,hostname,ipaddr4,ipaddr6,kubernetes,level,message,namespace_name,namespace_uuid,offset,openstack,ovirt,pid,pipeline_metadata,rsyslog,service,systemd,tags,testcase,tlog,viaq_msg_id
    extra_keep_fields ''
    keep_empty_fields 'message'
    use_undefined false
    undefined_name 'undefined'
    rename_time true
    rename_time_if_missing false
    src_time_name 'time'
    dest_time_name '@timestamp'
    pipeline_type 'collector'
    undefined_to_string 'false'
    undefined_dot_replace_char 'UNUSED'
    undefined_max_num_fields '-1'
    process_kubernetes_events 'false'
    <formatter>
      tag "system.var.log**"
      type sys_var_log
      remove_keys host,pid,ident
    </formatter>
    <formatter>
      tag "journal.system**"
      type sys_journal
      remove_keys log,stream,MESSAGE,_SOURCE_REALTIME_TIMESTAMP,__REALTIME_TIMESTAMP,CONTAINER_ID,CONTAINER_ID_FULL,CONTAINER_NAME,PRIORITY,_BOOT_ID,_CAP_EFFECTIVE,_CMDLINE,_COMM,_EXE,_GID,_HOSTNAME,_MACHINE_ID,_PID,_SELINUX_CONTEXT,_SYSTEMD_CGROUP,_SYSTEMD_SLICE,_SYSTEMD_UNIT,_TRANSPORT,_UID,_AUDIT_LOGINUID,_AUDIT_SESSION,_SYSTEMD_OWNER_UID,_SYSTEMD_SESSION,_SYSTEMD_USER_UNIT,CODE_FILE,CODE_FUNCTION,CODE_LINE,ERRNO,MESSAGE_ID,RESULT,UNIT,_KERNEL_DEVICE,_KERNEL_SUBSYSTEM,_UDEV_SYSNAME,_UDEV_DEVNODE,_UDEV_DEVLINK,SYSLOG_FACILITY,SYSLOG_IDENTIFIER,SYSLOG_PID
    </formatter>
    <formatter>
      tag "kubernetes.journal.container**"
      type k8s_journal
      remove_keys 'log,stream,MESSAGE,_SOURCE_REALTIME_TIMESTAMP,__REALTIME_TIMESTAMP,CONTAINER_ID,CONTAINER_ID_FULL,CONTAINER_NAME,PRIORITY,_BOOT_ID,_CAP_EFFECTIVE,_CMDLINE,_COMM,_EXE,_GID,_HOSTNAME,_MACHINE_ID,_PID,_SELINUX_CONTEXT,_SYSTEMD_CGROUP,_SYSTEMD_SLICE,_SYSTEMD_UNIT,_TRANSPORT,_UID,_AUDIT_LOGINUID,_AUDIT_SESSION,_SYSTEMD_OWNER_UID,_SYSTEMD_SESSION,_SYSTEMD_USER_UNIT,CODE_FILE,CODE_FUNCTION,CODE_LINE,ERRNO,MESSAGE_ID,RESULT,UNIT,_KERNEL_DEVICE,_KERNEL_SUBSYSTEM,_UDEV_SYSNAME,_UDEV_DEVNODE,_UDEV_DEVLINK,SYSLOG_FACILITY,SYSLOG_IDENTIFIER,SYSLOG_PID'
    </formatter>
    <formatter>
      tag "kubernetes.var.log.containers.eventrouter-** kubernetes.var.log.containers.cluster-logging-eventrouter-** k8s-audit.log** openshift-audit.log** ovn-audit.log**"
      type k8s_json_file
      remove_keys log,stream,CONTAINER_ID_FULL,CONTAINER_NAME
      process_kubernetes_events 'true'
    </formatter>
    <formatter>
      tag "kubernetes.var.log.containers**"
      type k8s_json_file
      remove_keys log,stream,CONTAINER_ID_FULL,CONTAINER_NAME
    </formatter>
    <elasticsearch_index_name>
      enabled 'true'
      tag "journal.system** system.var.log** **_default_** **_kube-*_** **_openshift-*_** **_openshift_**"
      name_type static
      static_index_name infra-write
    </elasticsearch_index_name>
    <elasticsearch_index_name>
      enabled 'true'
      tag "linux-audit.log** k8s-audit.log** openshift-audit.log** ovn-audit.log**"
      name_type static
      static_index_name audit-write
    </elasticsearch_index_name>
    <elasticsearch_index_name>
      enabled 'true'
      tag "**"
      name_type static
      static_index_name app-write
    </elasticsearch_index_name>
  </filter>
  
  # Generate elasticsearch id
  <filter **>
    @type elasticsearch_genid_ext
    hash_id_key viaq_msg_id
    alt_key kubernetes.event.metadata.uid
    alt_tags 'kubernetes.var.log.containers.logging-eventrouter-*.** kubernetes.var.log.containers.eventrouter-*.** kubernetes.var.log.containers.cluster-logging-eventrouter-*.** kubernetes.journal.container._default_.kubernetes-event'
  </filter>
  
  # Discard Infrastructure logs
  <match **_default_** **_kube-*_** **_openshift-*_** **_openshift_** journal.** system.var.log**>
    @type null
  </match>
  
  # Include Application logs
  <match kubernetes.**>
    @type relabel
    @label @_APPLICATION
  </match>
  
  # Discard Audit logs
  <match linux-audit.log** k8s-audit.log** openshift-audit.log** ovn-audit.log**>
    @type null
  </match>
  
  # Send any remaining unmatched tags to stdout
  <match **>
   @type stdout
  </match>
</label>

# Sending application source type to pipeline
<label @_APPLICATION>
  <filter **>
    @type record_modifier
    <record>
      log_type application
    </record>
  </filter>
  
  <match **>
    @type relabel
    @label @FORWARD_PIPELINE
  </match>
</label>

# Copying pipeline forward-pipeline to outputs
<label @FORWARD_PIPELINE>
  <match **>
    @type copy
    <store>
      @type relabel
      @label @ELASTICSEARCH
    </store>
    
    <store>
      @type relabel
      @label @SYSLOG
    </store>
  </match>
</label>

# Ship logs to specific outputs
<label @ELASTICSEARCH>
  #remove structured field if present
  <filter **>
    @type record_modifier
    remove_keys structured
  </filter>
  
  #flatten labels to prevent field explosion in ES
  <filter **>
    @type record_transformer
    enable_ruby true
    <record>
      kubernetes ${!record['kubernetes'].nil? ? record['kubernetes'].merge({"flat_labels": (record['kubernetes']['labels']||{}).map{|k,v| "#{k}=#{v}"}}) : {} }
    </record>
    remove_keys $.kubernetes.labels
  </filter>
  
  <match retry_elasticsearch>
    @type elasticsearch
    @id retry_elasticsearch
    host 0.0.0.0
    port 9200
    verify_es_version_at_startup false
    scheme http
    target_index_key viaq_index_name
    id_key viaq_msg_id
    remove_keys viaq_index_name
    type_name _doc
    http_backend typhoeus
    write_operation create
    reload_connections 'true'
    # https://github.com/uken/fluent-plugin-elasticsearch#reload-after
    reload_after '200'
    # https://github.com/uken/fluent-plugin-elasticsearch#sniffer-class-name
    sniffer_class_name 'Fluent::Plugin::ElasticsearchSimpleSniffer'
    reload_on_failure false
    # 2 ^ 31
    request_timeout 2147483648
    <buffer>
      @type file
      path '/var/lib/fluentd/retry_elasticsearch'
      flush_mode interval
      flush_interval 1s
      flush_thread_count 2
      retry_type exponential_backoff
      retry_wait 1s
      retry_max_interval 60s
      retry_timeout 60m
      queued_chunks_limit_size "#{ENV['BUFFER_QUEUE_LIMIT'] || '32'}"
      total_limit_size "#{ENV['TOTAL_LIMIT_SIZE_PER_BUFFER'] || '8589934592'}"
      chunk_limit_size "#{ENV['BUFFER_SIZE_LIMIT'] || '8m'}"
      overflow_action block
    </buffer>
  </match>
  
  <match **>
    @type elasticsearch
    @id elasticsearch
    host 0.0.0.0
    port 9200
    verify_es_version_at_startup false
    scheme http
    target_index_key viaq_index_name
    id_key viaq_msg_id
    remove_keys viaq_index_name
    type_name _doc
    retry_tag retry_elasticsearch
    http_backend typhoeus
    write_operation create
    reload_connections 'true'
    # https://github.com/uken/fluent-plugin-elasticsearch#reload-after
    reload_after '200'
    # https://github.com/uken/fluent-plugin-elasticsearch#sniffer-class-name
    sniffer_class_name 'Fluent::Plugin::ElasticsearchSimpleSniffer'
    reload_on_failure false
    # 2 ^ 31
    request_timeout 2147483648
    <buffer>
      @type file
      path '/var/lib/fluentd/elasticsearch'
      flush_mode interval
      flush_interval 1s
      flush_thread_count 2
      retry_type exponential_backoff
      retry_wait 1s
      retry_max_interval 60s
      retry_timeout 60m
      queued_chunks_limit_size "#{ENV['BUFFER_QUEUE_LIMIT'] || '32'}"
      total_limit_size "#{ENV['TOTAL_LIMIT_SIZE_PER_BUFFER'] || '8589934592'}"
      chunk_limit_size "#{ENV['BUFFER_SIZE_LIMIT'] || '8m'}"
      overflow_action block
    </buffer>
  </match>
</label>

<label @SYSLOG>
  <filter **>
    @type parse_json_field
    json_fields  message
    merge_json_log false
    replace_json_log true
  </filter>
  
  <match **>
    @type remote_syslog
    @id syslog
    host 0.0.0.0
    port 24224
    rfc rfc5424
    facility user
    severity debug
    appname myapp
    msgid mymsg
    procid myproc
    protocol udp
    packet_size 4096
    hostname "#{ENV['NODE_NAME']}"
    <format>
      @type json
    </format>
    <buffer>
      @type file
      path '/var/lib/fluentd/syslog'
      flush_mode interval
      flush_interval 1s
      flush_thread_count 2
      retry_type exponential_backoff
      retry_wait 1s
      retry_max_interval 60s
      retry_timeout 60m
      queued_chunks_limit_size "#{ENV['BUFFER_QUEUE_LIMIT'] || '32'}"
      total_limit_size "#{ENV['TOTAL_LIMIT_SIZE_PER_BUFFER'] || '8589934592'}"
      chunk_limit_size "#{ENV['BUFFER_SIZE_LIMIT'] || '8m'}"
      overflow_action block
    </buffer>
  </match>
</label>