Online Installation Into Existing Kubernetes Cluster

Last modified on June 22, 2022

This guide contains the steps to install SwaggerHub On-Premise to an existing Kubernetes cluster. When complete, the SwaggerHub application will be deployed in the chosen namespace in the cluster.

Prerequisites

This guide assumes a Kubernetes cluster has been prepared as specified in the Minimum Requirements.

All commands assume a jumpbox with connectivity to the cluster, and kubectl installed.

Prepare the jumpbox

  1. Connect to the jumpbox using SSH as an administrative user.

  2. Make sure kubectl is set up to contact the cluster. A quick test would list the nodes, expecting to see several listed like this:

    $ kubectl get node
    NAME                         STATUS   ROLES    AGE   VERSION
    ip-10-100-1-2.ec2.internal   Ready    <none>   33d   v1.21.2-13+d2965f0db10712
    ip-10-100-1-3.ec2.internal   Ready    <none>   33d   v1.21.2-13+d2965f0db10712
    ip-10-100-1-4.ec2.internal   Ready    <none>   33d   v1.21.2-13+d2965f0db10712
  3. Make sure kubectl has permissions to perform the installation. Run the following command - the answer should be yes:

    $ kubectl auth can-i create clusterrole -A
    yes

Install KOTS to kubectl

SwaggerHub 2.x uses KOTS to manage the installation, licensing, and updates. KOTS is a plugin for kubectl. SwaggerHub requires KOTS 1.68.0 or later.

First, check if KOTS is already installed:

$ kubectl kots version

If you see Replicated KOTS 1.x.x and the version is:

If you see the “unknown command” error, proceed to install KOTS.

The easiest way to install KOTS is to run this one-liner command:

$ curl https://kots.io/install | bash

If you do not have root access or cannot write to the /usr/local/bin directory, you can download and install KOTS manually:

  1. Download the latest release for your operating system from:

    https://github.com/replicatedhq/kots/releases/latest

    Linux and macOS are supported.

  2. Unpack the release.

  3. Rename the kots executable kubectl-kots.

  4. Copy the renamed kubectl-kots to anywhere on the PATH.

Launch the installation

Choose a new namespace for SwaggerHub On-Premise that does not conflict with any existing in your cluster. In this guide, we will use swaggerhub.

The following will begin the installation process. It will:

  • Deploy an administration server to the cluster.

  • Ask for a new password for the administration service. Provide a new password, record it, and keep it safe.

  • When the server is ready, it will create a port forward to be accessible from the install VM.

To install, run this command:

$ kubectl kots install swaggerhub --namespace swaggerhub

You will then be prompted to enter a password for the administration console:

* Deploying Admin Console
  * Creating namespace [x]
  * Waiting for datastore to be ready [x]
Enter a new password to be used for the Admin Console: ********
* Waiting for Admin Console to be ready [x]

* Press Ctrl+C to exit
* Go to http://localhost:8800 to access the Admin Console

At this point, the base installation is finished. You can press Ctrl + C anytime to end the port forwarding session to the Admin Console.

At any time in the future, you can resume port forwarding to the Admin Console with this command and finish the session with Ctrl + C.

$ kubectl kots admin-console --namespace swaggerhub
• Press Ctrl+C to exit
• Go to http://localhost:8800 to access the Admin Console
Note:

If SSH is routing to this console, for example a jumpbox situation, port forwarding will be needed to access the admin console from a local desktop. The example below will show how to tunnel from the administrator’s desktop to the jumpbox VM using SSH, which will then open port 8800 to reach the administrator console.

General example to tunnel from the administrator’s desktop:

$ ssh -i id_rsa -L 8800:localhost:8800 user@jump_box

Upload the license

Browse to http://localhost:8800 and log in to the Admin Console using the administrator password that you set during deployment.

Login prompt

On the next screen, you will be asked to upload your SwaggerHub license file (.yaml):

Upload your license file

Click the image to enlarge it.

If your SwaggerHub license supports airgapped (offline) installations, you will see an option to proceed with the airgapped setup. Since you are installing SwaggerHub in online mode, click Download SwaggerHub from the Internet.

Skipping airgapped installation

Configure SwaggerHub

On the next page, you can specify the configuration settings for SwaggerHub. The required settings are:

  • DNS name for SwaggerHub - Specify a public or internal domain name that will be used to access SwaggerHub on your network. For example, swaggerhub.mycompany.com.

    This domain name must already be registered in your DNS service. You will need to point it to the ingress controller.

  • Database settings - Choose between internal or external databases. If using external databases, you need to specify the database connection strings.

    It will not possible to switch from internal to external databases or vice versa after the initial configuration.
  • SMTP settings - Specify an SMTP server for outgoing email.

Other settings are optional and depend on your environment and the desired integrations. Most settings can also be changed later. See SwaggerHub Configuration for a description of the available settings.

Configuration page

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Preflight checks

The next step checks your Kubernetes cluster to ensure it meets the minimum requirements.

If all preflight checks are green, click Continue.

If one or more checks fail, do not proceed with the installation and contact Support.

Preflight checks passed

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Status checks

While the installer allocates resources and deploys workloads, the application status on the dashboard will be Unavailable. If it stays in this state for more than 10 minutes, generate a support bundle and send it to the Support team.

Status showing Unavailable

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Tip: To monitor the deployment progress, you can run

kubectl get pods -n swaggerhub

a few times until all pods are Running or Completed:

NAME                                       READY   STATUS      RESTARTS   AGE
kotsadm-85d89dbc7-lwvq2                    1/1     Running     0          32m
kotsadm-minio-0                            1/1     Running     6          13d
kotsadm-postgres-0                         1/1     Running     5          13d
spec-converter-api-584cc46657-hbfmd        1/1     Running     0          9m55s
swagger-generator-v3-6fc55cb57d-brwg6      1/1     Running     0          9m55s
swaggerhub-accounts-api-8bb87565b-xthkv    1/1     Running     0          9m55s
swaggerhub-api-service-546b56b94b-6jxch    1/1     Running     0          9m55s
swaggerhub-configs-api-794847bd79-jnlhl    1/1     Running     0          9m55s
swaggerhub-custom-rules-5ccfd45599-d5bxc   1/1     Running     0          9m55s
swaggerhub-frontend-69b7c55595-n7vsj       1/1     Running     0          9m55s
swaggerhub-notifications-bbd5f8794-ggz99   1/1     Running     0          9m55s
swaggerhub-operator-758c997747-hnjt7       1/1     Running     0          9m55s
swaggerhub-pre-install-r9c2f               0/1     Completed   0          13d
swaggerhub-pre-upgrade-cg664               0/1     Completed   0          10m
swaggerhub-products-api-6dd446b654-7w7wn   1/1     Running     0          9m55s
swaggerhub-registry-api-886997fd7-8q8c7    1/1     Running     0          9m54s
swaggerhub-virtserver-79fdf54f98-wpmt8     1/1     Running     0          9m54s

Once the application has become ready, the status indicators on the Dashboard become green.

Status is 'ready'

Click the image to enlarge it.

Create admin user and default organization

Run the following command to create an admin user and a default organization in SwaggerHub. Note the space in -- cmd.

Example:

kubectl exec -it deploy/swaggerhub-operator -n swaggerhub -- cmd create-admin-user admin -p p@55w0rd devops@example.com myorg
  • The admin username must be between 3 to 20 characters and can only contain characters A..Z a..z 0..9 - _ .

  • The admin password must be at least 7 characters long with at least 1 lowercase letter and 1 number. If the password contains characters that have a special meaning in Bash (such as ! $ & and others), enclose the password in single quotes (like -p '$passw0rd') or escape the special characters.

Once done, open the SwaggerHub web application at http://DNS_NAME and log in using the admin username and password. You should see the created organization in the sidebar:

Organization name in the SwaggerHub sidebar

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What’s next

Now that SwaggerHub is up and running, you can:

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