fluentd: k8s log to logzio

fluentd_k8s_log_to_logzio.conf

# This configuration file for Fluentd / td-agent is used
# to watch changes to Docker log files that live in the
# directory /var/lib/docker/containers/ and are symbolically
# linked to from the /var/log directory using names that capture the
# pod name and container name. These logs are then submitted to
# Google Cloud Logging which assumes the installation of the cloud-logging plug-in.
#
# This configuration is almost identical to google-fluentd-journal.conf, with
# the one difference being that this doesn't try to collect systemd journal
# logs.
#
# Example
# =======
# A line in the Docker log file might like like this JSON:
#
# {"log":"2014/09/25 21:15:03 Got request with path wombat\n",
#  "stream":"stderr",
#   "time":"2014-09-25T21:15:03.499185026Z"}
#
# The record reformer is used to write the tag to focus on the pod name
# and the Kubernetes container name. For example a Docker container's logs
# might be in the directory:
#  /var/lib/docker/containers/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b
# and in the file:
#  997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b-json.log
# where 997599971ee6... is the Docker ID of the running container.
# The Kubernetes kubelet makes a symbolic link to this file on the host machine
# in the /var/log/containers directory which includes the pod name and the Kubernetes
# container name:
#    synthetic-logger-0.25lps-pod_default-synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
#    ->
#    /var/lib/docker/containers/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b-json.log
# The /var/log directory on the host is mapped to the /var/log directory in the container
# running this instance of Fluentd and we end up collecting the file:
#   /var/log/containers/synthetic-logger-0.25lps-pod_default-synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
# This results in the tag:
#  var.log.containers.synthetic-logger-0.25lps-pod_default-synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
# The record reformer is used is discard the var.log.containers prefix and
# the Docker container ID suffix and "kubernetes." is pre-pended giving the
# final tag which is ingested into Elasticsearch:
#   kubernetes.synthetic-logger-0.25lps-pod_default-synth-lgr
# This makes it easier for users to search for logs by pod name or by
# the name of the Kubernetes container regardless of how many times the
# Kubernetes pod has been restarted (resulting in a several Docker container IDs).

# Do not directly collect fluentd's own logs to avoid infinite loops.
<match fluent.**>
type null
</match>

<source>
  type tail
  path "#{ENV['LOG_PATH']}"
  pos_file /var/log/containers/logz-pos-containers.log.pos
  time_format %Y-%m-%dT%H:%M:%S.%NZ
  keep_time_key true
  tag kubernetes.*
  format json
</source>

<filter kubernetes.**>
  type kubernetes_metadata
</filter>

<match kubernetes.**>
  type logzio_buffered
  endpoint_url "#{ENV['LOGZIO_URL']}?token=#{ENV['LOGZIO_TOKEN']}&type=#{ENV['LOGZIO_TYPE']}"
  output_include_time true
  output_include_tags true
  buffer_type file
  buffer_path /tmp/logz-io-buffer
  flush_interval 10s
  buffer_chunk_limit 1m
</match>