install-and-configure-cw-ecs.sh

#!/bin/bash
#
# Installs and Configures the AWS cloudwatch agent, and sets the default log group name and region 
#
# 
# You need to add the following policy statement to the machine's IAM role.
#
#    {
#      "Effect": "Allow",
#      "Action": [
#        "logs:CreateLogGroup",
#        "logs:CreateLogStream",
#        "logs:PutLogEvents",
#        "logs:DescribeLogStreams"
#    ],
#    "Resource": [
#      "arn:aws:logs:*:*:*"
#    ]
#  }
#
LOG_GROUP=ecs-syslog-default
REGION=eu-west-1

function usage() {
        echo "USAGE: $(basename $0) [-g log-group-name] [-r region]" >&2
        echo "  $@" >&2
}

while getopts ":g:r:" OPT; do
  case $OPT in
    g)
      LOG_GROUP=$OPTARG;;
    r)
        REGION=$OPTARG;;
    \?)
      usage "Invalid option: -$OPTARG"
      exit 1 ;;
  esac
done

sudo yum install -y awslogs
sudo sed -i "s/^region[ \t]*=.*/region = $REGION/" /etc/awslogs/awscli.conf
sudo sed -i "s/^log_group_name[ \t]*=.*/log_group_name = $LOG_GROUP/" /etc/awslogs/awslogs.conf
sudo chkconfig awslogs on
sudo service awslogs start