Auto-Scaling Groups (ASG)

This topic explains how to install Portworx with Kubernetes on AWS (Auto-Scaling Groups). Follow the steps in this topic in order.

For more information on using Auto-Scaling groups, go here.

Prepare

Granting Portworx the needed AWS permissions

Portworx creates and attaches EBS volumes. As such, it needs the AWS permissions to do so. Below is a sample policy describing these permissions:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "<stmt-id>",
            "Effect": "Allow",
            "Action": [
                "ec2:AttachVolume",
                "ec2:ModifyVolume",
                "ec2:DetachVolume",
                "ec2:CreateTags",
                "ec2:CreateVolume",
                "ec2:DeleteTags",
                "ec2:DeleteVolume",
                "ec2:DescribeTags",
                "ec2:DescribeVolumeAttribute",
                "ec2:DescribeVolumesModifications",
                "ec2:DescribeVolumeStatus",
                "ec2:DescribeVolumes",
                "ec2:DescribeInstances"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}

You can provide these permissions to Portworx in one of following ways:

Instance Privileges: Provide above permissions for all the instances in the autoscaling cluster by applying the corresponding IAM role. More info about IAM roles and policies can be found here
Environment Variables: Create a User with the above policy and provide the security credentials (AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY) to Portworx.

Install

If you are not using instance privileges, you must also specify AWS environment variables in the DaemonSet spec file. The environment variables to specify (for the KOPS IAM user) are:

AWS_ACCESS_KEY_ID=<id>,AWS_SECRET_ACCESS_KEY=<key>

If generating the DaemonSet spec via the GUI wizard, specify the AWS environment variables in the List of environment variables field. If generating the DaemonSet spec via the command line, specify the AWS environment variables using the e parameter.

Generate the specs

To install Portworx with Kubernetes, you must first generate Kubernetes manifests that you will deploy in your cluster:

Navigate to PX-Central and log in, or create an account
Select Install and Run to open the Spec Generator
Select New Spec

Portworx can also be installed using it’s Helm chart by following instructions here. The above method is recommended over helm as the wizard will guide you based on your environment.

Apply the specs

Apply the generated specs to your cluster.

kubectl apply -f px-spec.yaml

Monitor the Portworx pods

Wait till all Portworx pods show as ready in the below output:

kubectl get pods -o wide -n kube-system -l name=portworx

Monitor Portworx cluster status

PX_POD=$(kubectl get pods -l name=portworx -n kube-system -o jsonpath='{.items[0].metadata.name}')
kubectl exec $PX_POD -n kube-system -- /opt/pwx/bin/pxctl status

Post-Install

Once you have a running Portworx installation, below sections are useful.