project-lakitu/app-admin/fluent-bit/files/fluent-bit.conf

#
# Copyright 2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
[SERVICE]
    # Flush
    # =====
    # set an interval of seconds before to flush records to a destination
    flush        1

    # Daemon
    # ======
    # instruct Fluent Bit to run in foreground or background mode.
    daemon       Off

    # Log_Level
    # =========
    # Set the verbosity level of the service, values can be:
    #
    # - error
    # - warning
    # - info
    # - debug
    # - trace
    #
    # by default 'info' is set, that means it includes 'error' and 'warning'.
    log_level    info

    # Parsers File
    # ============
    # specify an optional 'Parsers' configuration file
    parsers_file parsers.conf

    # Plugins File
    # ============
    # specify an optional 'Plugins' configuration file to load external plugins.
    #
    # plugins_file plugins.conf

    # HTTP Server
    # ===========
    # Enable/Disable the built-in HTTP Server for metrics
    http_server  Off
    # http_listen  0.0.0.0
    # http_port    2020

    # Storage
    # =======
    # Fluent Bit can use memory and filesystem buffering based mechanisms
    #
    # - https://docs.fluentbit.io/manual/administration/buffering-and-storage
    #
    # storage metrics
    # ---------------
    # publish storage pipeline metrics in '/api/v1/storage'. The metrics are
    # exported only if the 'http_server' option is enabled.
    #
    storage.metrics on

    # storage.path
    # ------------
    # absolute file system path to store filesystem data buffers (chunks).
    #
    # storage.path /tmp/storage

    # storage.sync
    # ------------
    # configure the synchronization mode used to store the data into the
    # filesystem. It can take the values normal or full.
    #
    # storage.sync normal

    # storage.checksum
    # ----------------
    # enable the data integrity check when writing and reading data from the
    # filesystem. The storage layer uses the CRC32 algorithm.
    #
    # storage.checksum off

    # storage.backlog.mem_limit
    # -------------------------
    # if storage.path is set, Fluent Bit will look for data chunks that were
    # not delivered and are still in the storage layer, these are called
    # backlog data. This option configure a hint of maximum value of memory
    # to use when processing these records.
    #
    # storage.backlog.mem_limit 5M

# Collects docker.service logs.
[INPUT]
    Name systemd
    Tag  cos_docker
    Systemd_Filter _SYSTEMD_UNIT=docker.service
    DB /var/log/google-fluentbit/docker.log.db
    Read_From_Tail False

# Collects COS system services logs.
[INPUT]
    Name systemd
    Tag  cos_system
    Systemd_Filter _SYSTEMD_UNIT=docker-events-collector-fluent-bit.service
    Systemd_Filter _SYSTEMD_UNIT=konlet-startup.service
    Systemd_Filter _SYSTEMD_UNIT=kubelet.service
    Systemd_Filter _SYSTEMD_UNIT=crash-reporter.service
    Systemd_Filter _SYSTEMD_UNIT=crash-sender.service
    Systemd_Filter _SYSTEMD_UNIT=crash-boot-collect.service
    Systemd_Filter _SYSTEMD_UNIT=kdump-load-kernel.service
    Systemd_Filter _SYSTEMD_UNIT=kdump-save-dump.service
    Systemd_Filter _SYSTEMD_UNIT=cis-level1.service
    Systemd_Filter _SYSTEMD_UNIT=cis-level2.service
    Systemd_Filter _SYSTEMD_UNIT=cis-compliance-scanner.service
    Systemd_Filter SYSLOG_IDENTIFIER=crash-sender.sh
    DB /var/log/google-fluentbit/system.log.db
    Read_From_Tail False

# Collects COS audit logs.
[INPUT]
    Name systemd
    Tag  cos_audit
    Systemd_Filter SYSLOG_IDENTIFIER=audit
    DB /var/log/google-fluentbit/audit.log.db
    Read_From_Tail False

# Collects all journal logs with priority >= warning
# Change priority levels to make it more/less verbose.
[INPUT]
    Name systemd
    Tag  cos_journal_warning
    Systemd_Filter PRIORITY=0
    Systemd_Filter PRIORITY=1
    Systemd_Filter PRIORITY=2
    Systemd_Filter PRIORITY=3
    Systemd_Filter PRIORITY=4
    DB /var/log/google-fluentbit/journal.db
    Read_From_Tail False

# Docker container logs (when not running Kubernetes).
# This will collect logs from all containers using json file logging driver.
# To query logs for specific container, use below filter on GCP logging:
# jsonPayload.container_id=CONTAINER_ID
[INPUT]
    Name tail
    Tag cos_containers
    Path /var/lib/docker/containers/*/*.log
    Parser docker
    DB /var/log/google-fluentbit/containers.log.db
    Path_Key file_name
    Read_from_Head True
    Mem_Buf_Limit 5MB
    Skip_Long_Lines On

# 1) Add container_id field in container logs.
[FILTER]
    Name parser
    Match cos_containers
    Key_Name file_name
    Parser container_filename_to_id
    Reserve_Data On

# 2) The following two filters save attrs[tag] as container_name field in
# the record.
[FILTER]
    Name nest
    Match cos_containers
    Operation lift
    Nested_under attrs
    Add_prefix attrs_

[FILTER]
    Name modify
    Match cos_containers
    Condition Key_exists attrs_tag
    Rename attrs_tag cos.googleapis.com/container_name

# If attrs[tag] doesn't exist, set container_name field as 'UNKNOWN'
[FILTER]
    Name modify
    Match cos_containers
    Condition Key_does_not_exist attrs_tag
    Add cos.googleapis.com/container_name UNKNOWN

[FILTER]
    Name modify
    Match cos_containers
    Rename container_id cos.googleapis.com/container_id
    # 3) Rename field 'stream' to avoid collisions from container logs where
    # users may be also using 'stream' as a key
    Rename stream cos.googleapis.com/stream
    # 4) Rename field 'log' to a more generic field 'message'. This way Logs
    # Explorer UI will display the log message as summary of the log entry.
    Rename log message
    # Remove other fields under attrs.
    Remove_wildcard attrs_

[OUTPUT]
    Name        stackdriver
    Match       *
    Resource    gce_instance