prahaladhchandrahasan/hawtio-online

Hawtio on Kubernetes/OpenShift

Hawtio Online

An Hawtio console that eases the discovery and management of hawtio-enabled ¹ applications deployed on OpenShift and Kubernetes.

Preparation

Prior to the deployment, depending on the cluster types you need to generate either of the proxying or serving certificates.

Certificate	Description
Proxying	Used to secure the communication between Hawtio Online and the Jolokia agents. A client certificate is generated and mounted into the Hawtio Online pod with a secret, to be used for TLS client authentication.
Serving	Used to secure the communication between the client and Hawtio Online.

OpenShift

Proxying certificates

For OpenShift, a client certificate must be generated using the service signing certificate authority private key.

Run the following script to generate and set up a client certificate for Hawtio Online:

$ ./scripts/generate-proxying.sh

or if you have Yarn installed, this will also do the same thing:

$ yarn gen:proxying

Serving certificates

For OpenShift, a serving certificate is automatically generated for your Hawtio Online deployment using the service signing certificate feature.

Kubernetes

Proxying certificates

For Kubernetes, proxing certificates are disabled by default and you don't need to go through the steps.

⚠️ This means that client certificate authentication between Hawtio Online and the Jolokia agents is not available by default for Kubernetes, and the Jolokia agents need to disable client certificate authentication so that Hawtio Online can connect to them. You can still use TLS for securing the communication between them.

It is possible to use a proxying client certificate for Hawtio Online on Kubernetes; it requires you to generate or provide a custom CA for the certificate and then mount/configure it into the Jolokia agent for its client certificate authentication.

Serving certificates

For Kubernetes, a serving certificate must be generated manually. Run the following script to generate and set up a certificate for Hawtio Online:

$ ./scripts/generate-serving.sh [-k tls.key] [-c tls.crt] [SECRET_NAME] [CN]

or:

$ yarn gen:serving [-k tls.key] [-c tls.crt] [SECRET_NAME] [CN]

You can provide an existing TLS key and certificate by passing parameters -k tls.key and -c tls.crt respectively. Otherwise, a self-signed tls.key and tls.crt will be generated automatically in the working directory and used for creating the serving certificate secret.

You can optionally pass SECRET_NAME and CN to customise the secret name and Common Name used in the TLS certificate. The default secret name is hawtio-online-tls-serving and CN is hawtio-online.hawtio.svc.

Manual steps

Instead of running the scripts you can choose to perform everything manually.

For manual steps, see Generating Certificates Manually.

Deployment

Now you can run the following instructions to deploy the Hawtio Online console on your OpenShift/Kubernetes cluster.

There are two deployment modes you can choose from: cluster and namespace.

Deployment Mode	Descripton
Cluster	The Hawtio Online console can discover and connect to hawtio-enabled 1 applications deployed across multiple namespaces / projects. OpenShift: Use an OAuth client that requires the cluster-admin role to be created. By default, this requires the generation of a client certificate, signed with the service signing certificate authority, prior to the deployment. See the Preparation - OpenShift section for more information.
Namespace	This restricts the Hawtio Online console access to a single namespace / project, and as such acts as a single tenant deployment. OpenShift: Use a service account as OAuth client, which only requires admin role in a project to be created. By default, this requires the generation of a client certificate, signed with the service signing certificate authority, prior to the deployment. See the Preparation - OpenShift section for more information.

OpenShift

You may want to read how to get started with the CLI for more information about the oc client tool.

To deploy the Hawtio Online console on OpenShift, follow the steps below.

Cluster mode

If you have Yarn installed:

$ yarn deploy:openshift:cluster

otherwise (two commands):

$ oc apply -k deploy/openshift/cluster/
$ ./deploy/openshift/cluster/oauthclient.sh

Namespace mode

If you have Yarn installed:

$ yarn deploy:openshift:namespace

otherwise:

$ oc apply -k deploy/openshift/namespace/

You can obtain the status of your deployment, by running:

$ oc status
In project hawtio on server https://192.168.64.12:8443

https://hawtio-online-hawtio.192.168.64.12.nip.io (reencrypt) (svc/hawtio-online)
  deployment/hawtio-online deploys hawtio/online:latest
    deployment #1 deployed 2 minutes ago - 1 pod

Open the route URL displayed above from your Web browser to access the Hawtio Online console.

Kubernetes

You may want to read how to get started with the CLI for more information about the kubectl client tool.

To deploy the Hawtio Online console on Kubernetes, follow the steps below.

Cluster mode

If you have Yarn installed:

$ yarn deploy:k8s:cluster

otherwise:

$ kubectl apply -k deploy/k8s/cluster/

Namespace mode

If you have Yarn installed:

$ yarn deploy:k8s:namespace

otherwise:

$ kubectl apply -k deploy/k8s/namespace/

Authentication

Hawtio Online currently supports two authentication modes: oauth and form, which is configured through HAWTIO_ONLINE_AUTH environment variable on Deployment.

Mode	Description
oauth	Authenticates requests through OpenShift OAuth server. It is available only on OpenShift.
form	Authenticates requests with bearer tokens throught the Hawtio login form.

Creating user for Form authentication

With the Form authentication mode, any user with a bearer token can be authenticated. See Authenticating for different ways to provide users with bearer tokens.

Here we illustrate how to create a ServiceAccount as a user to log in to the Hawtio console as an example. See Creating a Hawtio user for Form authentication for more details.

RBAC

See RBAC.

Development

Tools

You must have the following tools installed:

• Node.js
• Yarn (version 1.5.1 or higher)
• gulp (version 4.x)

Build

$ yarn install

Install

In order to authenticate and obtain OAuth access tokens for the Hawtio console be authorized to watch for hawtio-enabled ¹ applications deployed in your cluster, you have to create an OAuth client that matches localhost development URLs.

Cluster mode

$ oc create -f oauthclient.yml

See OAuth Clients for more information.

Namespace mode

$ oc create -f serviceaccount.yml

See Service Accounts as OAuth Clients for more information.

Run

Cluster mode

$ yarn start --master=`oc whoami --show-server` --mode=cluster

Namespace mode

$ yarn start --master=`oc whoami --show-server` --mode=namespace --namespace=`oc project -q`

You can access the console at http://localhost:2772/.

Disable Jolokia authentication for deployments (dev only)

In order for a local hawtio-online to detect the hawtio-enabled applications, each application container needs to be configured with the following environment variables:

AB_JOLOKIA_AUTH_OPENSHIFT=false
AB_JOLOKIA_PASSWORD_RANDOM=false
AB_JOLOKIA_OPTS=useSslClientAuthentication=false,protocol=https

The following script lets you apply the above environment variables to all the deployments with a label provider=fabric8 in a batch:

$ ./scripts/disable-jolokia-auth.sh

---

1. Containers with a configured port named jolokia and that exposes the Jolokia API.