Expose an HTTP Service from a Cluster

A guide on how to expose an HTTP service from a cluster that is authenticated via Omni user accounts. Viewing the exposed service requires an Omni user with at least Reader access to the cluster.

Enabling Workload Service Proxying Feature

You first need to enable the workload service proxying feature on the cluster you want to expose Services from.

If you are creating a new cluster, you can enable the feature by checking the checkbox in the “Cluster Features” section:

For an existing cluster, simply check the checkbox in the features section of the cluster overview page.

If you are using cluster templates, you can enable the feature by adding the following to the cluster template YAML:

features:
  enableWorkloadProxy: true

You will notice that the “Exposed Services” section will appear on the left menu for the cluster the feature is enabled on.

Exposing a Kubernetes Service

Let’s install a simple Nginx deployment and service to expose it.

Create the following nginx.yaml file:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: workload-proxy-example-nginx
  namespace: default
spec:
  selector:
    matchLabels:
      app: workload-proxy-example-nginx
  template:
    metadata:
      labels:
        app: workload-proxy-example-nginx
    spec:
      containers:
        - name: workload-proxy-example-nginx
          image: nginx:stable-alpine-slim
---
apiVersion: v1
kind: Service
metadata:
  name: workload-proxy-example-nginx
  namespace: default
  annotations:
    omni-kube-service-exposer.sidero.dev/port: "50080"
    omni-kube-service-exposer.sidero.dev/label: Sample Nginx
    #omni-kube-service-exposer.sidero.dev/prefix: myservice
    omni-kube-service-exposer.sidero.dev/icon: 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
spec:
  selector:
    app: workload-proxy-example-nginx
  ports:
    - name: http
      port: 80
      targetPort: 80

Apply it to the cluster:

kubectl apply -f nginx.yaml

Note the following annotations on the cluster:

omni-kube-service-exposer.sidero.dev/port: "50080"
omni-kube-service-exposer.sidero.dev/label: Sample Nginx
#omni-kube-service-exposer.sidero.dev/prefix: myservice
omni-kube-service-exposer.sidero.dev/icon: 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

To expose a service, only the omni-kube-service-exposer.sidero.dev/port annotation is required.

Its value must be a port that is unused on the nodes, such as by other exposed Services.

The annotation omni-kube-service-exposer.sidero.dev/label can be set to a human-friendly name to be displayed on the Omni Web left menu.

If not set, the default name of <service-name>.<service-namespace> will be used.

The annotation omni-kube-service-exposer.sidero.dev/prefix can be set to use a user-defined prefix instead of a randomly-generated alphanumeric string as a prefix in the URL.

The annotation omni-kube-service-exposer.sidero.dev/icon can be set to render an icon for this service on the Omni Web left menu.

If set, valid values are:

Either a base64-encoded SVG
Or a base64-encoded GZIP of an SVG

To encode an SVG file icon.svg to be used for the annotation, you can use the following command:

gzip -c icon.svg | base64

Accessing the Exposed Service

You will notice that the Service you annotated will appear under the “Exposed Services” section in Omni Web, on the left menu when the cluster is selected.

Clicking it will open the exposed service in Omni.

The URL will either contain a randomly-generated alphanumeric prefix, or the user-defined prefix if the omni-kube-service-exposer.sidero.dev/prefix annotation was set.

This feature only works with HTTP services. Raw TCP or UDP are not supported.

The services are only accessible to users authenticated to Omni and that have at leastReaderlevel access to the cluster containing the Service.

Examples

Some common examples include running cluster services such as monitoring that require Omni access.

Grafana

Grafana is a popular dashboarding tool that can be installed as a helm chart and exposed with the following values.yaml.

service:
  annotations:
    omni-kube-service-exposer.sidero.dev/port: "53000"
    omni-kube-service-exposer.sidero.dev/label: Grafana
    omni-kube-service-exposer.sidero.dev/prefix: grafana
    omni-kube-service-exposer.sidero.dev/icon: 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

You can then install the grafana chart with:

helm repo add grafana https://grafana.github.io/helm-charts
helm install -f values.yaml grafana grafana/grafana

Kubernetes Dashboard

The Kubernetes dashboard can be deployed via helm into a cluster and exposed with the workload proxy using the following values.yaml.

web:
  serviceAnnotations:
    omni-kube-service-exposer.sidero.dev/port: "58888"
    omni-kube-service-exposer.sidero.dev/label: Dashboard
    omni-kube-service-exposer.sidero.dev/prefix: dashboard
    omni-kube-service-exposer.sidero.dev/icon: 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

You can then install the kubernetes dashboard chart with:

helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard
helm install dashboard -f values.yaml kubernetes-dashboard/kubernetes-dashboard

Troubleshooting

You can get more info and troubleshoot the exposed services by running the following command:

omnictl get exposedservices

You will get an output like:

NAMESPACE   TYPE             ID                              VERSION   PORT    LABEL    URL                                                           ERROR                                                             HAS EXPLICIT ALIAS
default     ExposedService   talos-default/nginx-1.default   2         12345   nginx    https://myservice1-omni.<omni-url>                                                                                              true
default     ExposedService   talos-default/nginx-2.default   2         12346   nginx2   https://myservice2-omni.<omni-url>                                                                                              true
default     ExposedService   talos-default/nginx-3.default   2         0                                                                              requested alias "myservice2" is already used by another service   false

Inspect the output to get information about the status of your exposed service.

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Last updated 2 days ago