Step 6: Install the App Manager and Application

The next step is to test the installation process for the application release that you promoted. Using the kots CLI, you will install the Replicated app manager and the sample application in your existing Kubernetes cluster.

The app manager is the Replicated component that allows your users to install, manage, and upgrade your application. Users can interact with the app manager through a user interface, called the Replicated admin console, or through a CLI, called the kots CLI.

To install the app manager and the application:

From the replicated-cli-tutorial directory, run the following command to get the installation commands for the Unstable channel, where you promoted the release for the cli-tutorial application:

replicated channel inspect Unstable

Example output:

ID:             2GmYFUFzj8JOSLYw0jAKKJKFua8
NAME:           Unstable
DESCRIPTION:
RELEASE:        1
VERSION:        Unstable-d4173a4
EXISTING:

    curl -fsSL https://kots.io/install | bash
    kubectl kots install cli-tutorial/unstable

EMBEDDED:

    curl -fsSL https://k8s.kurl.sh/cli-tutorial-unstable | sudo bash

AIRGAP:

    curl -fSL -o cli-tutorial-unstable.tar.gz https://k8s.kurl.sh/bundle/cli-tutorial-unstable.tar.gz
    # ... scp or sneakernet cli-tutorial-unstable.tar.gz to airgapped machine, then
    tar xvf cli-tutorial-unstable.tar.gz
    sudo bash ./install.sh airgap

This command prints information about the channel, including the commands for installing in:

An existing cluster
An embedded cluster created by the Replicated Kubernetes installer
An air gap cluster that is not connected to the Internet

If you have not already, configure kubectl access to the cluster you provisioned as part of Set Up the Environment. For more information about setting the context for kubectl, see Command line tool (kubectl) in the Kubernetes documentation.
Run the EXISTING installation script with the following flags to automatically upload the license file and run the preflight checks at the same time you run the installation.
Example:
```
curl -fsSL https://kots.io/install | bash
kubectl kots install cli-tutorial/unstable \
--license-file ./LICENSE_YAML \
--shared-password PASSWORD \
--namespace NAMESPACE
```
Replace:
- LICENSE_YAML with the local path to your license file.
- PASSWORD with a password to access the admin console.
- NAMESPACE with the namespace where the app manager and application will be installed.
When the admin console is ready, the script prints the https://localhost:8800 URL where you can access the admin console and the http://localhost:8888 URL where you can access the application.
Example output:
```
• Deploying Admin Console
 • Creating namespace ✓
 • Waiting for datastore to be ready ✓
• Waiting for Admin Console to be ready ✓
• Waiting for installation to complete ✓
• Waiting for preflight checks to complete ✓

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

• Go to http://localhost:8888 to access the application
```

Verify that the Pods are running for the example NGNIX service and for kotsadm, which is the app manager:

kubectl get pods --namespace NAMESPACE

Replace NAMESPACE with the namespace where the app manager and application was installed.

Example output:

kotsadm-7ccc8586b8-n7vf6   1/1     Running   0          12m
kotsadm-minio-0            1/1     Running   0          17m
kotsadm-rqlite-0           1/1     Running   0          17m
nginx-688f4b5d44-8s5v7     1/1     Running   0          11m

Next Step

Continue to Step 7: Configure the Application to log in to the admin console and make configuration changes.

Step 6: Install the App Manager and Application

Next Step​

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