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CloudFormation template that runs a 7 Days to Die server with idle shutdown, start/stop access control and static IP

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7 Days to Die - Dedicated Server on AWS

Run a dedicated 7 Days to Die server with start/stop access control, idle shutdown when no players connected and a static IP address.

Architecture

The architecture consists of three main components. An EBS Volume of 100GB, an Elastic IP Address and an EC2 Instance. The volume is deployed separately, so the instance can be re-deployed without deleting the volume, keeping any existing game data between instances. Deployment Architecture

Configuration

The main 7 Days to Die server configuration is controlled via the XML file injected during the cfn-init process. This is located in the metadata of the EC2 Instance resource in instance.yml

Deployment

There are three main CloudFormation templates. The EIP and EBS Volume templates can be run in any order. The EC2 Instance template must be run after both of the other templates have been deployed.

  1. Deploy ip.yml
  2. Deploy volume.yml
  3. Ensure you have the following SSM Parameters: - steam-username: Username for Steam account to use - steam-password: Password for Steam account to use - 7days-password: Password for the server itself - 7days-server-ip-bucket: An S3 bucket name to upload 7dserver.txt, containing server IP and port in 0.0.0.0:8080 format.
  4. Deploy instance.yml

Usage

Check the Stack output of instance.yml or the S3 bucket (s3://${S3BucketName}/7dserver.txt) for the IP and port of the server you have deployed. Then connect to it using 7 Days to Die.

Start/Stop Access Control

If you make an IAM User for people who want to be able to turn on the server on-demand then you can provide them 7days.bat to enable them to easily turn on and off the right server, without them knowing the current instance ID.

Pass in the action (either start or stop). You can optionally provide an AWS CLI profile name to use instead of the default e.g. 7days.bat start myprofile

If you would like to lock down the IAM User to only be able to control this 7 Days server then attach this policy to the user:

{
  "Version": "2012-10-17",
  "Statement": [{
      "Action": [
        "ec2:StartInstances",
        "ec2:StopInstances",
        "ec2:RebootInstances"
      ],
      "Condition": {
        "StringEquals": {
          "ec2:ResourceTag/AccessControl": "7Days"
        }
      },
      "Resource": "*",
      "Effect": "Allow"
    },
    {
      "Effect": "Allow",
      "Action": "ec2:Describe*",
      "Resource": "*"
    }
  ]
}

Idle Shutdown

A cronjob is installed to run each hour using an automated telnet connection in /opt/games/7days/listplayers.sh. This lists the number of players currently connected to the server. If the number equals 0 then the server will shutdown.

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CloudFormation template that runs a 7 Days to Die server with idle shutdown, start/stop access control and static IP

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