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title:Installing Deis on AWS
description:How to provision a multi-node Deis cluster on Amazon AWS

Amazon AWS

In this tutorial, we will show you how to set up your own 3-node cluster on Amazon Web Services.

Please :ref:`get the source <get_the_source>` and refer to the scripts in contrib/ec2 while following this documentation.

Install the AWS Command Line Interface

In order to start working with Amazon's API, let's install awscli:

$ pip install awscli

We'll also need PyYAML for the Deis EC2 provision script to run:

$ pip install pyyaml

Configure aws-cli

Run aws configure to set your AWS credentials:

$ aws configure
AWS Access Key ID [None]: ***************
AWS Secret Access Key [None]: ************************
Default region name [None]: us-west-1
Default output format [None]:

Upload keys

Generate and upload a new keypair to AWS, ensuring that the name of the keypair is set to "deis".

$ ssh-keygen -q -t rsa -f ~/.ssh/deis -N '' -C deis
$ aws ec2 import-key-pair --key-name deis --public-key-material file://~/.ssh/deis.pub

Choose Number of Instances

By default, the script will provision 3 servers. You can override this by setting DEIS_NUM_INSTANCES:

$ export DEIS_NUM_INSTANCES=5

Note that for scheduling to work properly, clusters must consist of at least 3 nodes and always have an odd number of members. For more information, see etcd disaster recovery.

Deis clusters of less than 3 nodes are unsupported.

Generate a New Discovery URL

Customize cloudformation.json

Any of the parameter defaults defined in deis.template.json can be overridden by setting the value in cloudformation.json. For example, to configure all of the options to non-default values:

{
    "ParameterKey":     "InstanceType",
    "ParameterValue":   "m3.xlarge"
},
{
    "ParameterKey":     "KeyPair",
    "ParameterValue":   "jsmith"
},
{
    "ParameterKey":     "EC2VirtualizationType",
    "ParameterValue":   "PV"
},
{
    "ParameterKey":     "AssociatePublicIP",
    "ParameterValue":   "false"
},
{
    "ParameterKey":     "ELBScheme",
    "ParameterValue":   "internal"
},
{
    "ParameterKey":     "RootVolumeSize",
    "ParameterValue":   "100"
},
{
    "ParameterKey":     "DockerVolumeSize",
    "ParameterValue":   "1000"
},
{
    "ParameterKey":     "EtcdVolumeSize",
    "ParameterValue":   "5"
}

The only entry in cloudformation.json required to launch your cluster is KeyPair, which is already filled out. The defaults will be applied for the other settings. The default values are defined in deis.template.json.

If updated with update-ec2-cluster.sh, the InstanceType will only impact newly deployed instances (#1758).

NOTE: The smallest recommended instance size is large. Having not enough CPU or RAM will result in numerous issues when using the cluster.

Launch into an existing VPC

By default, the provided CloudFormation script will create a new VPC for Deis. However, the script supports provisioning into an existing VPC instead. You'll need to have a VPC configured with an internet gateway and a sane routing table (the default VPC in a region should be ready to go).

To launch your cluster into an existing VPC, export three additional environment variables:

  • VPC_ID
  • VPC_SUBNETS
  • VPC_ZONES

VPC_ZONES must list the availability zones of the subnets in order.

For example, if your VPC has ID vpc-a26218bf and consists of the subnets subnet-04d7f942 (which is in us-east-1b) and subnet-2b03ab7f (which is in us-east-1c) you would export:

export VPC_ID=vpc-a26218bf
export VPC_SUBNETS=subnet-04d7f942,subnet-2b03ab7f
export VPC_ZONES=us-east-1b,us-east-1c

If you have set up private subnets in which you'd like to run your Deis hosts, and public subnets for the ELB, you should export the following environment variables instead:

  • VPC_ID
  • VPC_SUBNETS
  • VPC_PRIVATE_SUBNETS
  • VPC_ZONES

For example, if you have a public subnet subnet-8cd457b3 for the ELB and a private subnet subnet-8cd457b0 (both in us-east-1a) you would export:

export VPC_ID=vpc-a26218bf
export VPC_SUBNETS=subnet-8cd457b3
export VPC_PRIVATE_SUBNETS=subnet-8cd457b0
export VPC_ZONES=us-east-1a

Run the Provision Script

Run the cloudformation provision script to spawn a new CoreOS cluster:

$ cd contrib/ec2
$ ./provision-ec2-cluster.sh
Creating CloudFormation stack deis
{
    "StackId": "arn:aws:cloudformation:us-east-1:69326027886:stack/deis/1e9916b0-d7ea-11e4-a0be-50d2020578e0"
}
Waiting for instances to be created...
Waiting for instances to be created... CREATE_IN_PROGRESS
Waiting for instances to pass initial health checks...
Waiting for instances to pass initial health checks...
Waiting for instances to pass initial health checks...
Instances are available:
i-5c3c91aa  203.0.113.91    m3.large        us-east-1a      running
i-403c91b6  203.0.113.20    m3.large        us-east-1a      running
i-e36fc6ee  203.0.113.31    m3.large        us-east-1b      running
Using ELB deis-DeisWebE-17PGCR3KPJC54 at deis-DeisWebE-17PGCR3KPJC54-1499385382.us-east-1.elb.amazonaws.com
�Your Deis cluster has been successfully deployed to AWS CloudFormation and is started.�
�Please continue to follow the instructions in the documentation.�

Note

The default name of the CloudFormation stack will be deis. You can specify a different name with ./provision-ec2-cluster.sh <name>.

Remote IPs behind your ELB

The ELB you just created is load-balancing raw TCP connections, which is required for custom domain SSL and WebSockets. As remote IPs are by default not visible behind a TCP-Proxy, the ELB and your cluster routers were created with Proxy Protocol enabled.

Configure DNS

See :ref:`configure-dns` for more information on properly setting up your DNS records with Deis.

Install Deis Platform

Now that you've finished provisioning a cluster, please refer to :ref:`install_deis_platform` to start installing the platform.

CloudFormation Updates

To use CloudFormation to perform update operations to your stack, there is another script: update_ec2_cluster.sh. Depending on the parameters that you have changed, CloudFormation may replace the EC2 instances in your stack.

The following parameters can be changed without replacing all instances in a stack:

  • ClusterSize - Number of nodes in the cluster. This may launch new instances or terminate existing instances. If you are scaling down, this may interrupt service. If a container was running on an instance that was terminated, it will have to be rebalanced onto another node which will cause some downtime.
  • SSHFrom - Locks down SSH access to the Deis hosts. This will update the security group for the Deis hosts.

Please reference the AWS documentation for more information about CloudFormation stack updates.