Custom CloudWatch Logs agent configuration file for Elastic Beanstalk AL2

awslogs.config

###################################################################################################
#### Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
####
#### Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file
#### except in compliance with the License. A copy of the License is located at
####
####     http://aws.amazon.com/apache2.0/
####
#### or in the "license" file accompanying this file. This file 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.
###################################################################################################

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#### The following file installs and configures the AWS CloudWatch Logs agent to push logs to a Log
#### Group in CloudWatch Logs.
#### 
#### The configuration below sets the logs to be pushed, the Log Group name to push the logs to and
#### the Log Stream name as the instance id. The following files are examples of logs that will be
#### streamed to CloudWatch Logs in near real time:
#### 
#### /var/log/messages
#### /var/log/dmesg
#### 
#### You can then access the CloudWatch Logs by accessing the AWS CloudWatch Console and clicking
#### the "Logs" link on the left. The Log Group name will follow this format:
####
#### /aws/elasticbeanstalk/<environment name>/<full log name path>
####
#### Please note this configuration can be used additionally to the "Log Streaming" feature:
#### http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/AWSHowTo.cloudwatchlogs.html
###################################################################################################

packages:
  yum:
    awslogs: []

files:
  "/etc/awslogs/awscli.conf" :
    mode: "000600"
    owner: root
    group: root
    content: |
      [plugins]
      cwlogs = cwlogs
      [default]
      region = `{"Ref":"AWS::Region"}`

  "/etc/awslogs/awslogs.conf" :
    mode: "000600"
    owner: root
    group: root
    content: |
      [general]
      state_file = /var/lib/awslogs/agent-state

  # https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/AgentReference.html
  "/etc/awslogs/config/logs.conf" :
    mode: "000600"
    owner: root
    group: root
    content: |
      [bgapp.stdout.log]
      log_group_name = `{"Fn::Join":["/", ["/aws/elasticbeanstalk", { "Ref":"AWSEBEnvironmentName" }, "var/log/bgapp.stdout.log"]]}`
      log_stream_name = {instance_id}
      file = /var/log/bgapp.stdout.log

commands:
  "01":
    command: systemctl enable awslogsd.service
  "02":
    command: systemctl restart awslogsd